JP2018171257A - Ultrasound endoscope and hood for ultrasound endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic endoscope and a hood for an ultrasonic endoscope capable of preventing a body cavity wall from coming into close contact with a tip body by suctioning, and securing an observation visual field by an observation window.SOLUTION: An ultrasonic endoscope includes: an ultrasonic transducer 50; a tip body 36 having a treatment instrument derivation part 56 and an observation window 44; and a hood 80 for an ultrasonic endoscope mounted on the tip body 36, which includes a hood body 81 and an eaves-like part 83. At least either the tip body 36 or the hood body 81 is provided with a communication part 87 that communicates a first space 68 on a tip side of the treatment instrument derivation part 56 and the observation window 44 and on a more proximal end side than the ultrasonic transducer 50, and a second space 70 on at least either the proximal end side or the outer peripheral side of the hood body 81.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an ultrasonic endoscope and an ultrasonic endoscope hood, and in particular, an ultrasonic endoscope and an ultrasonic endoscope hood that prevent the body cavity wall from sticking to the distal end main body of the endoscope insertion portion. About.

  2. Description of the Related Art As an ultrasonic endoscope, one having an electronic scanning ultrasonic transducer at the distal end portion of an endoscope insertion portion (hereinafter referred to as an insertion portion) is known. Then, while acquiring an ultrasonic image of the lesion using the ultrasonic transducer, puncture the lesion with the puncture needle derived from the treatment instrument outlet through the treatment instrument insertion channel, and the cellular tissue of the lesion is determined. It is being collected.

  In the ultrasonic endoscope, the distal end body is disposed on the proximal end side of the ultrasonic transducer. The distal end body includes the treatment instrument outlet, an observation window, and an illumination window, and can be observed with an optical image in the same manner as a general endoscope. A puncture needle is attached to the body cavity wall. Until the puncture is performed close to the puncture needle, the puncture needle can be reliably guided to the target site by observing with an optical image.

  In the observation by ultrasonic waves, if there is a gap between the ultrasonic transducer and the body cavity wall, the ultrasonic waves are reflected by the gap and an image inside the tissue cannot be obtained. Therefore, in order to acquire a clear ultrasonic image, it is necessary to bring the ultrasonic transducer into close contact with the body cavity wall. At this time, the body cavity wall may be in close contact with the outer surface of the observation window, and the field of view may be lost from the observation window. If the field of view of the observation window is lost, the puncture point (puncture point) cannot be visually recognized.

  In addition, the puncture point can be confirmed using an ultrasound image without using an optical image, but even in that case, if the body cavity wall is in close contact with the observation window, the entire image becomes a red strange image. There is a problem of giving an unpleasant impression.

  The following Patent Document 1 includes a hook-like portion protruding toward the front of an observation window of an ultrasonic endoscope at the tip of a hood, and when the ultrasonic transducer is brought into close contact with the body cavity wall, the body cavity wall is observed. An ultrasonic endoscope hood that prevents the body cavity wall from sticking to the observation window by interposing a hook-like portion between the window and the window is described.

Japanese Patent Laid-Open No. 2006-59471

  When the ultrasonic transducer is brought into close contact with the body cavity wall, the body cavity wall is aspirated from the treatment instrument outlet of the distal end body, thereby being brought into close contact with the ultrasonic transducer. At this time, unexpected negative pressure may be generated in the space between the notch portion of the hood and the body cavity wall, and the space between the tip of the hood, the body cavity wall, and the ultrasonic transducer, and the body cavity wall may be excessively sucked. . When the hood is provided, the wall surface of the hood suppresses the inflow of air, so that a negative pressure is easily generated, and the body cavity wall is easily adhered to the observation window. Therefore, the observation visual field of the observation window is blocked by the body cavity wall, which may hinder examinations and treatments.

  The present invention has been made in view of such circumstances, and when the ultrasonic transducer is brought into close contact with the body cavity wall, the body cavity wall is prevented from coming into close contact with the distal end body by suction, and the observation field of view through the observation window is increased. An object is to provide an ultrasonic endoscope and a hood for an ultrasonic endoscope that can be secured.

  To achieve the above object, the present invention provides an ultrasonic transducer having an ultrasonic transducer, and a treatment instrument derivation having a treatment instrument outlet that is disposed on the proximal end side of the ultrasonic transducer and through which the treatment instrument is derived. And a distal end body provided with an observation window for observing the treatment portion, and a mounting portion attached to the tip portion main body, the tip being an ultrasonic transducer A hood body disposed on the proximal end side than the hood body, and an ultrasonic hood provided on the hood body, and a hook-shaped portion that protrudes toward the observation field of view of the observation window. At least one of the main body and the hood main body, the communication portion is a first space on the distal end side of the treatment instrument lead-out portion and the observation window on the proximal end side from the ultrasonic transducer, and a proximal end of the hood main body Side and outer side Even Ku to provide an ultrasonic endoscope which communicates, and one of the second space.

  According to the present invention, when the body cavity wall is in close contact with the entire first space at the distal end of the treatment instrument outlet and the observation window and the first space becomes negative pressure, the air in the second space communicates with the communication space. Thus, the negative pressure in the first space can be released. Therefore, when the ultrasonic transducer is brought into close contact with the body cavity wall, the body cavity wall is brought into close contact with the tip body by suction. And the observation visual field by the observation window can be secured.

  In another aspect of the present invention, the communication part is a communication path provided on the inner wall surface of the hood main body along the axial direction of the tip end main body and communicating the first space and the second space. preferable.

  This aspect shows one aspect of the communication portion, and the first space and the second space are communicated by providing a communication path along the axis of the tip portion main body on the inner wall surface of the hood main body. be able to.

  In another aspect of the present invention, the communication portion is preferably a groove portion provided on the outer wall surface of the distal end portion main body and extending from the first space to the proximal end side of the distal end portion main body.

  This aspect shows one aspect of the communication part, and the first space and the second space can be communicated by providing a groove on the outer wall surface of the tip body.

  In another aspect of the present invention, the communication portion is constituted by a groove portion provided on the outer wall surface of the tip portion main body, and a communication hole provided in the hood main body and communicating the groove portion and the outer peripheral portion of the hood main body. It is preferable.

  This aspect shows one aspect of the communication part, providing a groove part on the outer wall surface of the tip part main body, and providing a communication hole communicating with the outer peripheral part at a position corresponding to the groove part in the hood main body, The first space and the second space can be communicated.

  In another aspect of the present invention, the communication hole preferably has a valve through which gas flows in a direction from the outer peripheral portion toward the groove portion.

  According to this aspect, by providing the valve in the communication hole, it is possible to prevent gas from flowing into the first space and prevent air from flowing in the reverse direction, thereby preventing the first space from becoming negative pressure. be able to.

  In order to achieve the above object, the present invention provides an ultrasonic transducer having an ultrasonic transducer, an opening that is disposed on the proximal end side of the ultrasonic transducer, and leads the treatment instrument from the treatment instrument insertion channel. A distal end body including a treatment instrument outlet having a treatment instrument outlet to be led out, an observation window disposed at a position adjacent to the treatment instrument outlet and observing the treatment section, and attached to the distal end body A hood main body having a mounting portion that is disposed on the proximal end side of the ultrasonic transducer, and a hook-shaped portion that is provided on the hood main body and protrudes toward the observation field of view of the observation window. An ultrasonic endoscope hood, and at least one of the distal end body and the hood main body, a first space proximal to the ultrasonic transducer on the distal end side of the treatment instrument outlet and the observation window; Treatment tool A third space formed by the treatment instrument outlet within the exit portion and an opening, a to provide an ultrasonic endoscope having a communicating portion communicating.

  According to the present invention, when the body cavity wall is in close contact with the treatment instrument outlet and the third space becomes negative pressure, the negative pressure in the third space is reduced by flowing air from the first space. It can be opened. Therefore, when the ultrasonic transducer is brought into close contact with the body cavity wall, it is possible to prevent the body cavity wall from coming into close contact with the distal end body by suction, and to secure an observation field of view through the observation window.

  In another aspect of the present invention, the hood main body has a notch portion formed at the formation position of the treatment instrument outlet, and a front end side of the hood main body on the opposite side of the hook-shaped portion with respect to the notch portion. A first projecting portion projecting toward the distal end portion main body side, and the communicating portion is formed by the first projecting portion, the inner wall surface of the hood body, and the outer wall surface of the distal end portion body. It is preferable.

  This aspect shows one aspect of the communication part, and has a first projecting part projecting toward the front end part main body side on the front end side of the hood main body, A communication part can be formed with the outer wall surface of the part main body. Thereby, air can flow into the third space and the negative pressure in the third space can be released.

  In another aspect of the present invention, the outer wall surface of the tip body has a second protrusion that protrudes toward the inner wall surface of the hood body, and the communication portion includes the second protrusion and the hood body. It is preferable that the inner wall surface and the outer wall surface of the tip body are formed.

  This aspect shows one aspect of the communication portion, and has a third protrusion that protrudes toward the inner wall surface of the hood body on the outer wall surface of the tip body, and the inner wall surface of the hood body. The communication portion can be formed with the outer wall surface of the tip portion main body. Thereby, air can flow into the third space and the negative pressure in the third space can be released.

  In another aspect of the present invention, the communication portion is preferably a groove portion provided on the outer wall surface of the tip portion main body and extending from the first space to the third space.

  This aspect shows one aspect of the communication portion, and by providing a groove portion extending from the first space to the third space on the outer wall surface of the tip portion main body, when the hood main body is mounted, can do.

  In order to achieve the above-mentioned object, the present invention provides an ultrasonic transducer having an ultrasonic transducer, and a distal end body disposed on the proximal end side of the ultrasonic transducer, the treatment starting from the distal end of the treatment instrument insertion channel. A treatment instrument derivation unit having an opening for deriving the instrument and a treatment instrument derivation port for deriving the treatment instrument derived from the opening from the main body of the distal end; and disposed at a position adjacent to the treatment instrument derivation unit and observing the treatment unit A hood body that has a distal end body that includes an observation window, a mounting portion that is attached to the distal end body, and the distal end of the hood body is disposed closer to the proximal end than the ultrasonic transducer, A hood for an ultrasonic endoscope provided with a hook-shaped portion protruding toward the observation visual field range of the window, and a second space on at least one of the proximal end side and the outer peripheral side of the hood main body, Within the treatment instrument outlet To provide an ultrasonic endoscope having a communicating portion and the third space, the communicating between the 置具 outlet and the opening.

  According to the present invention, when the body cavity wall is in close contact with the treatment instrument outlet and the third space becomes negative pressure, the negative pressure in the third space is reduced by flowing air from the second space. It can be opened. Therefore, when the ultrasonic transducer is brought into close contact with the body cavity wall, it is possible to prevent the body cavity wall from coming into close contact with the distal end body by suction, and to secure an observation field of view through the observation window.

  In another aspect of the present invention, the communication portion is preferably a communication path that is provided on the inner wall surface of the hood main body and communicates the second space and the third space.

  This aspect shows one aspect of the communication portion, and the second space and the third space are communicated by providing a communication path along the axis of the tip portion main body on the inner wall surface of the hood main body. be able to.

  In another aspect of the present invention, the communication portion is preferably a groove provided on the outer wall surface of the distal end portion main body and extending from the third space to the proximal end side of the distal end portion main body.

  This aspect shows one aspect of the communication part, and the second space and the third space can be communicated by providing a groove on the outer wall surface of the tip body.

  In another aspect of the present invention, the communication portion is constituted by a groove portion provided on the outer wall surface of the tip portion main body, and a communication hole provided in the hood main body and communicating the groove portion and the outer peripheral portion of the hood main body. It is preferable.

  This aspect shows one aspect of the communication part, providing a groove part on the outer wall surface of the tip part main body, and providing a communication hole communicating with the outer peripheral part at a position corresponding to the groove part in the hood main body, The second space and the third space can be communicated.

  In another aspect of the present invention, the communication hole preferably has a valve through which gas flows in a direction from the outer peripheral portion toward the groove portion.

  According to this aspect, by providing the valve in the communication hole, it is possible to prevent gas from flowing into the third space and prevent air from flowing in the reverse direction, thereby preventing the third space from becoming negative pressure. be able to.

  In order to achieve the above-mentioned object, the present invention provides an ultrasonic transducer having an ultrasonic transducer, and a distal end body disposed on the proximal end side of the ultrasonic transducer, the treatment starting from the distal end of the treatment instrument insertion channel. A treatment instrument derivation unit having an opening for deriving the instrument and a treatment instrument derivation port for deriving the treatment instrument derived from the opening from the main body of the distal end; and disposed at a position adjacent to the treatment instrument derivation unit and observing the treatment unit A hood for an ultrasonic endoscope used in an ultrasonic endoscope having an observation window, and a mounting portion attached to the distal end body, wherein the tip is ultrasonic A hood body arranged on the proximal side of the transducer, a hook-like portion provided on the hood body and projecting toward the observation field of view of the observation window, and an inner wall surface of the hood body along the axial direction of the distal end body Communication path Provides a hood for an ultrasound endoscope comprising a.

  According to the present invention, when the body cavity wall is in close contact with the treatment instrument lead-out portion of the distal end body of the ultrasonic endoscope and the distal end side of the observation window on the proximal end side of the ultrasonic transducer, the continuous hood body is provided. Using the passage, air can flow into the treatment instrument outlet and the distal end side of the observation window. Therefore, when the ultrasonic transducer is brought into close contact with the body cavity wall, it is possible to prevent the body cavity wall from coming into close contact with the distal end body by suction, and to secure an observation field of view through the observation window.

  To achieve the above object, the present invention provides an ultrasonic transducer having an ultrasonic transducer, and a treatment instrument derivation having a treatment instrument outlet that is disposed on the proximal end side of the ultrasonic transducer and through which the treatment instrument is derived. A distal end portion provided with an observation window for observing the treatment portion, and a groove portion provided on the outer wall surface and extending from the distal end side toward the treatment instrument lead-out port A hood for an ultrasonic endoscope used for an ultrasonic endoscope having a main body, and having a mounting portion attached to the main body of the distal end portion, the distal end being disposed on the proximal end side relative to the ultrasonic transducer. A hood main body, a hook-shaped portion provided on the hood main body and projecting toward the observation field of view of the observation window, and a communication hole provided in the hood main body and communicating the groove portion and the outer peripheral portion of the tip main body. Equipped food hood for ultrasound endoscope To provide.

  According to the present invention, for an ultrasonic endoscope having a groove portion on the outer wall surface of the distal end portion main body, by providing a communication hole that communicates with the outer peripheral portion at a position corresponding to the groove portion of the hood main body, The negative pressure in the space on the outlet side or the distal end side of the treatment instrument outlet and the observation window at the rear end side of the ultrasonic transducer can be released.

  To achieve the above object, the present invention provides an ultrasonic transducer having an ultrasonic transducer, and a treatment instrument derivation having a treatment instrument outlet that is disposed on the proximal end side of the ultrasonic transducer and through which the treatment instrument is derived. A hood for an ultrasonic endoscope used in an ultrasonic endoscope, comprising: a distal end main body provided with a portion and an observation window for observing the treatment portion. A hood body having a mounting portion to be attached to the distal end body, the distal end being disposed on the proximal side of the ultrasonic transducer, and the hood body, which protrudes toward the observation field range of the observation window And a notch portion formed at the position where the treatment instrument outlet is formed, and an inner wall surface of the hood main body, the first provided on the tip side opposite to the notch portion with respect to the notch portion. And an ultrasonic endoscope hood comprising: To.

  According to the present invention, by providing the first protrusion on the inner wall surface of the hood body, when the hood body is attached to the ultrasonic endoscope, the first protrusion, the inner wall surface of the hood body, and the tip A communication part can be formed with the outer wall surface of the part main body. Thereby, air can be allowed to flow into the treatment instrument outlet of the ultrasonic endoscope, and the body cavity wall can be prevented from coming into close contact with the treatment instrument outlet.

  To achieve the above object, the present invention provides an ultrasonic transducer having an ultrasonic transducer, and a treatment instrument derivation having a treatment instrument outlet that is disposed on the proximal end side of the ultrasonic transducer and through which the treatment instrument is derived. A hood for an ultrasonic endoscope used in an ultrasonic endoscope, comprising: a distal end main body provided with a portion and an observation window for observing the treatment portion. A hood body having a mounting portion to be attached to the distal end body, the distal end being disposed on the proximal side of the ultrasonic transducer, and the hood body, which protrudes toward the observation field range of the observation window Ultrasonic wave comprising: a saddle-shaped part; a notch part formed at a position where the treatment instrument outlet is formed; and a communication path provided on the inner wall surface of the hood main body and extending from the notch part toward the proximal end side Provide endoscope hood.

  According to the present invention, air can be introduced into the treatment instrument outlet using the communication passage provided in the hood body. Thereby, adhesion to the front-end | tip part main body of a body cavity wall can be prevented, and a treatment and a test | inspection can be performed confirming with an observation window.

  According to the present invention, when the ultrasonic transducer is brought into close contact with the body cavity wall, it is possible to prevent the body cavity wall from coming into close contact with the distal end main body by suction, and to secure an observation visual field through the observation window.

1 is an overall view of an ultrasonic endoscope according to the present invention. It is the perspective view which expanded and showed the front-end | tip part. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope of 1st Embodiment, and the ultrasonic hood. It is a perspective view which shows the state which mounted | wore the front-end | tip part of the endoscope and ultrasonic hood of 1st Embodiment. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope and ultrasonic hood of 2nd Embodiment. It is a perspective view which shows the state which mounted | wore the front-end | tip part and endoscope hood for ultrasonic endoscopes of 2nd Embodiment. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope of 3rd Embodiment, and the ultrasonic hood. It is a perspective view which shows the state which mounted | wore the front-end | tip part of the endoscope of 3rd Embodiment, and the hood for ultrasonic endoscopes. It is a figure explaining the effect | action of a valve. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope of 4th Embodiment, and the ultrasonic hood. It is a perspective view which shows the state which mounted | wore the front-end | tip part and endoscope hood for ultrasonic endoscopes of 4th Embodiment. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope of 5th Embodiment, and the ultrasonic hood. It is a perspective view which shows the state which mounted | wore the front-end | tip part and endoscope hood for ultrasonic endoscopes of 5th Embodiment. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope of 6th Embodiment, and the ultrasonic hood. It is a perspective view which shows the state which mounted | wore the front-end | tip part of the endoscope and ultrasonic hood of 6th Embodiment. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope and ultrasonic hood of 7th Embodiment. It is a perspective view which shows the state which mounted | wore the front-end | tip part of the endoscope of 7th Embodiment, and the ultrasonic hood. It is a perspective view which shows the state which removed the front-end | tip part of the endoscope of 8th Embodiment, and the ultrasonic hood. It is a perspective view which shows the state which mounted | wore the front-end | tip part and endoscope hood for ultrasonic endoscopes of 8th Embodiment. It is a perspective view which shows the state which removed the front-end | tip part and endoscope hood for ultrasonic endoscopes of 9th Embodiment. It is a perspective view which shows the state which mounted | wore with the front-end | tip part of the endoscope of 9th Embodiment, and the ultrasonic hood.

  Hereinafter, an ultrasonic endoscope and an ultrasonic endoscope hood according to the present invention will be described with reference to the accompanying drawings.

(Ultrasound endoscope)
[First Embodiment]
FIG. 1 is an overall view of an ultrasonic endoscope 1 to which the present invention is applied.

  An ultrasonic endoscope 1 (hereinafter, also simply referred to as “endoscope 1”) in FIG. 1 includes an operation unit 10 that a practitioner holds and performs various operations, an insertion unit 12 that is inserted into a body cavity, And a universal cord 14. The endoscope 1 is connected via a universal cord 14 to a system component device such as a processor device (not shown) and a light source device that form an endoscope system.

  The operation unit 10 is provided with various operation members operated by a practitioner. For example, an angle knob 16, a standing operation lever 18, an air / water supply button 20, and a suction button 22, which will be described later as appropriate, are provided. ing.

  Further, the operation unit 10 is provided with a treatment instrument introduction port 24 for inserting a treatment instrument into a treatment instrument insertion channel inserted into the insertion section 12.

  The insertion part 12 is extended from the front-end | tip of the operation part 10, and the whole is formed in the elongate shape by a small diameter.

  Moreover, the insertion part 12 is comprised by the soft part 30, the curved part 32, and the front-end | tip part 34 in order toward the front end side from the base end side.

  The soft portion 30 occupies most of the insertion portion 12 from the proximal end side, and has flexibility to bend in an arbitrary direction. When the insertion part 12 is inserted into the body cavity, the flexible part 30 bends along the insertion path into the body cavity.

  The bending portion 32 is bent in the vertical direction and the left-right direction by rotating the angle knob 16 of the operation unit 10, and the distal end portion 34 is directed in a desired direction by bending the bending portion 32. Can do.

  The universal cord 14 includes an electric cable, a light guide, and a fluid tube. A connector is provided at an end (not shown) of the universal cord 14, and the connector is connected to a predetermined system component device constituting an endoscope system such as a processor device and a light source device. The apparatus is supplied with power, control signals, illumination light, liquid, gas, and the like necessary for the operation of the endoscope 1 from the apparatus, and observation image data acquired by the imaging unit, and an ultrasonic transducer The acquired ultrasonic image data is transmitted from the endoscope 1 to the system component apparatus. Note that the observation image and the ultrasonic image transmitted to the system component apparatus are displayed on a monitor and can be observed by a practitioner or the like.

  Then, the structure of the front-end | tip part 34 of the insertion part 12 is demonstrated. FIG. 2 is an enlarged perspective view of the distal end portion 34.

  The distal end portion 34 has a distal end portion main body 36 that forms an outer wall and an inner partition wall, and each component arranged in the distal end portion main body 36 is accommodated and held in an accommodating portion provided in the distal end portion main body 36. . 2 indicates the axis 38 of the tip body 36. The axis 38 refers to a line that is coincident with or parallel to the longitudinal axis of the insertion portion 12 of FIG.

  Although details are omitted, a part of the tip portion main body 36 can be detachably removed as a separate block, and each component can be assembled in a predetermined accommodating portion with the separate block removed. After assembling each component into the housing portion, the separate block is attached to the tip body 36, whereby each component is housed and held in the housing portion and fixed to the tip portion 34.

  The tip end body 36 is made of an insulating material having an insulating property, for example, a resin material such as a methacrylic resin and a plastic such as polycarbonate.

  As shown in FIG. 2, the distal end portion 34 includes a base portion 40 that constitutes the distal end portion main body 36, and an extending portion 42 that extends from the base portion 40 toward the distal end side and holds the ultrasonic transducer 50.

  That is, the extension 42 has an ultrasonic transmission / reception surface 52 formed by arranging ultrasonic transducers for transmitting and receiving ultrasonic waves in a curved shape along the direction of the axis 38 of the tip body 36. A transducer 50 is arranged. Data for generating an ultrasonic image of the body tissue is acquired by the ultrasonic transducer 50. The number of ultrasonic transducers is not limited, and may be one, or two or more ultrasonic transducers may be arranged.

  The distal end main body 36 has an outer wall surface 37, and a left observation means forming surface 64 </ b> L and a right observation means forming surface that face obliquely upward toward the proximal end side of the distal end body 36 at the distal end side of the outer wall surface 37. 64R. A treatment instrument lead-out portion 56 is provided at the center between the left observation means formation surface 64L and the right observation means formation surface 64R. The left observation means forming surface 64L is provided with an observation window 44, an air / water supply nozzle 48, and an illumination window 46L. The observation window 44 is disposed at a position adjacent to the treatment instrument outlet 56. An illumination window 46R is provided on the right observation means forming surface 64R. Here, the observation window 44 is disposed at a position adjacent to the treatment instrument deriving unit 56. The observation window 44 is disposed at a position where the treatment instrument derived from the treatment instrument deriving unit 56 falls within the visual field range of the observation window 44. If so, the present invention is not limited to the case where the observation window 44 or the left observation means forming surface 64 </ b> L provided with the observation window 44 is arranged next to the treatment instrument outlet 56. Another member may be disposed between the observation window 44 or the left observation means forming surface 64L and the treatment instrument outlet 56.

  Inside the observation window 44 is housed an imaging system unit in which an imaging optical system and a solid-state imaging device constituting the imaging unit are integrally assembled. As a result, when light from the treatment unit that becomes the visual field range of the imaging unit is taken in from the observation window 44, the light is imaged as an observation image on the individual imaging element via the imaging optical system. That is, the treatment unit is imaged by the solid-state imaging device.

  The light emission part which comprises an illumination part is accommodated in the inside of the illumination windows 46L and 46R. Illumination light transmitted from the light source unit connected to the universal cord 14 through the light guide is emitted from the light emission unit, and the illumination light is treated through the illumination windows 46L and 46R in the visual field range of the imaging unit. Is irradiated.

  The air / water supply nozzle 48 is provided on the left observation means forming surface 64L. By operating the air / water supply button 20 in FIG. 1, the cleaning liquid, water, Alternatively, air or the like (hereinafter also referred to as “cleaning liquid or the like”) is jetted to clean the observation window 44 or the like.

  The treatment instrument lead-out portion 56 has a concave upright stand accommodating portion 62, and an opening 66 of the treatment instrument insertion channel is disposed on the proximal end side of the upright stand accommodating portion 62. The opening 66 is connected to the treatment instrument introduction port 24 of the operation unit 10 through a treatment instrument insertion channel inserted into the insertion portion 12, and the treatment instrument inserted from the treatment instrument introduction port 24 is accommodated from the opening 66 on the stand. Derived to part 62.

  A stand 60 is disposed at a position in front of the opening 66 of the stand support unit 62. The stand 60 is made of a metal material such as stainless steel, and has a concave guide surface that curves upward from the proximal end side of the distal end body 36 toward the distal end side on the upper surface side. The treatment instrument led out from the opening 66 is provided in the upright stand accommodating portion 62 by being curved upward along the guide surface with respect to the direction of the axis 38 of the distal end portion main body 36 (for example, the longitudinal axis direction of the insertion portion 12). The treatment tool is led out from the treatment tool outlet 58.

  Further, the stand 60 is configured to stand up by operating the stand control lever 18 shown in FIG. 1, and the treatment tool is guided by adjusting the stand angle from the lying down state by moving the stand 60 up. The derivation direction (derivation angle) of the treatment instrument derived from the outlet 58 can be changed.

  Note that the treatment instrument insertion channel is also connected to a suction channel (not shown), and by operating the suction button 22 in FIG. 1, body fluid or the like can be sucked from the treatment instrument outlet 58.

  Next, an ultrasonic endoscope hood that is detachably attached to the distal end body 36 of the endoscope 1 will be described.

  3 is a perspective view showing the distal end portion 34 and an ultrasonic endoscope hood 80 (hereinafter, simply referred to as the hood 80), showing the hood 80 before being attached to the distal end portion main body 36. As shown in FIG. FIG. 4 is a perspective view of the distal end portion 34 in which a hood 80 is attached to the distal end portion main body 36.

  The hood 80 shown in these drawings has a hood body 81 made of an elastic material such as silicon rubber or fluorine rubber and formed in a cylindrical shape. Further, the hood 80 extends from the distal end of the hood main body 81 to the proximal end side at a position corresponding to the formation position of the treatment instrument outlet 58 of the distal end main body 36 when the hood 80 is attached to the distal end main body 36. A notch 84 is provided. The hood 80 may be transparent or not transparent.

  The inner peripheral surface of the hood main body 81 has substantially the same diameter as the cylindrical outer wall surface 37 of the distal end portion main body 36, and the mounting portion 82 on the proximal end side of the hood main body 81 is arranged on the distal end portion main body 36 as shown in FIG. 4. The mounting portion 82 is in close contact with the outer wall surface 37 by being fitted on the outer wall surface 37. Thereby, the hood main body 81 is attached to the tip end main body 36 as shown in FIG.

  The configuration of the mounting portion 82 can be arbitrarily changed. Further, the hood main body 81 can be attached to the tip end main body 36 by using any fixing means such as an adhesive or an adhesive tape.

  The hood main body 81 has a position where the base end of the notch 84 substantially coincides with the position of the base end of the recessed stand receiving portion 62 in the treatment instrument outlet 58 of the distal end main body 36, and It is mounted at a position where the circumferential position of the stand support section 62 and the circumferential position of the notch 84 substantially coincide. As a result, the hood body 81 is fixed at a substantially prescribed position with respect to the distal end portion body 36, and the hood body 81 is disposed at a position that does not hinder the derivation of the treatment instrument from the treatment instrument derivation port 58.

  When the hood main body 81 is thus attached to the distal end body 36, the distal end of the hood main body 81 is disposed on the proximal end side with respect to the ultrasonic transducer 50.

  When the hood main body 81 is attached to the distal end portion main body 36, the left observation means forming surface 64R and the right observation means forming surface 64R are at least on the left and right sides of the cutout portion 84 of the hood main body 81. Are arranged so as not to contact the outer wall surface 37 of the tip body 36.

  A hook-like portion 83 that is a portion on the left end side with respect to the notch portion 84 of the hood main body 81 is disposed so as to protrude toward the observation field range of the observation window 44. In a state where the hood 80 is attached to the distal end portion main body 36, the hook-shaped portion 83 of the hood main body 81 protrudes to a position overlapping the observation window 44 in plan view. In addition, the bowl-shaped portion 83 is arranged in a visual field range that does not overlap with the visual field range for observing the treatment instrument derived from the treatment instrument outlet 58 in the observation visual field range of the observation window 44 (imaging means). The

  The saddle-like portion 83 is preferably provided on the opposite side of the treatment instrument outlet 58 with the plane parallel to the axis 38 of the distal end portion body 36 and including the optical axis of the observation window 44. Moreover, it is desirable that the hook-shaped portion 83 is provided at a position that does not overlap the ultrasonic scanning range of the ultrasonic transducer 50, and more preferably at a position that satisfies both.

  A communication passage 85 extending along the direction of the axis 38 of the tip end body 36 is provided on the inner wall surface of the hood body 81. The communication passage 85 is formed on the inner wall surface of the hood main body 81 by two protruding ridges 86 along the direction of the axis 38 of the distal end portion main body 36, and the communication passage 85 can be formed between the protruding ridges 86. . When the hood main body 81 is attached to the distal end portion main body 36, a communication portion 87 is formed between the communication path 85 and the outer wall surface 37 of the distal end portion main body 36.

  According to the endoscope 1 of the first embodiment configured as described above, when the insertion portion 12 is inserted into the body cavity and a suction operation is performed to bring the ultrasonic transducer 50 into close contact with the body cavity wall, FIG. As described above, the first space 68 formed by the ultrasonic transducer 50, the observation means forming surfaces 64L and 64R, and the body cavity wall may become negative pressure. When the negative pressure is reached, the observation window 44 may come into close contact with the body cavity wall and the optical field of view by the observation window 44 may be blocked. However, according to the endoscope 1 of the first embodiment, as indicated by the arrow A in FIG. In addition, air flows from the second space 70 on the base end side of the hood main body 81 into the first space 68 through the communication portion 87. Thereby, since the advance of the negative pressure in the first space 68 is prevented, the observation window 44 can be prevented from coming into close contact with the body cavity wall. Therefore, according to the endoscope 1 of the first embodiment, when the ultrasonic transducer 50 is brought into close contact with the body cavity wall, the body cavity wall is prevented from coming into close contact with the distal end main body 36 by suction, and observation through the observation window 44 is performed. A visual field can be secured.

  The configuration of the communication path 85 is not particularly limited as long as air can be introduced from the proximal end side of the hood main body 81 (the distal end main body 36). For example, a groove portion can be formed on the inner wall surface of the hood body 81, and the groove portion can be used as the communication path 85. Further, a hole penetrating from the proximal end side to the distal end side of the hood body can be provided between the outer wall surface and the inner wall surface of the hood body 81, and this hole can be used as a communication path. Further, the number of communication passages 85 is not particularly limited. As shown in FIG. 3 and FIG. 4, one or more may be provided.

  Further, the hood body 81 may be provided with a communication hole that allows the communication passage 85 and the outer wall surface of the hood body 81 to communicate with each other. By providing the communication hole, air can be caused to flow into the first space 68 from the outer wall surface of the hood main body 81, and the inflow distance of air into the first space 68 can be shortened.

[Second Embodiment]
Next, the endoscope distal end portion 134 and the ultrasonic endoscope hood 180 (hereinafter simply referred to as the hood 180) according to the second embodiment will be described.

  FIG. 5 is a perspective view showing the distal end portion 134 and the hood 180 of the endoscope according to the second embodiment, and showing the hood 180 before being attached to the distal end portion main body 136. FIG. 6 is a perspective view showing a state in which the hood 180 is attached to the distal end body 136. In the description of the second embodiment shown in FIG. 5 and FIG. 6, the same or similar members as those in the first embodiment shown in FIG. 3 and FIG. is there.

  The endoscope according to the second embodiment is provided with a groove 172 in the distal end main body 136, and the hood 180 does not have a communication path. The distal end main body 36 and the hood 80 of the endoscope according to the first embodiment are not provided. It is a different configuration.

  As shown in FIGS. 5 and 6, the outer wall surface 137 of the distal end main body 136 extends from the left observation means forming surface 64 </ b> L to the proximal end side of the distal end main body 136 along the axis 138 direction of the distal end main body 136. A groove 172 is provided. When the hood 180 is attached to the distal end main body 136, the communication portion 187 is formed by the groove 172 and the inner wall surface of the hood main body 181. The groove portion 172 is formed from the base end portion of the hood 180 to a position where the groove portion 172 is exposed when the hood 180 is attached to the distal end portion main body 136.

  According to the endoscope of the second embodiment, as indicated by an arrow B in FIG. 6, air is passed from the second space 70 on the proximal end side of the hood main body 181 to the first space 68 via the communication path 187. Can flow in. Therefore, according to the endoscope of the second embodiment, when the ultrasonic transducer 50 is brought into close contact with the body cavity wall, the body cavity wall is prevented from coming into close contact with the distal end body 36 by suction, and the observation field of view by the observation window 44 is reduced. Can be secured.

  The shape of the groove portion 172 is not particularly limited as long as air can flow from the second space 70 into the first space 68. As shown in FIGS. 5 and 6, the cross section may be a curved surface having an arc shape, or the cross section may be constituted by a plurality of planes such as a square shape.

[Third Embodiment]
Next, the endoscope distal end 234 and the ultrasonic endoscope hood 280 (hereinafter simply referred to as the hood 280) according to the third embodiment will be described.

  FIG. 7 is a perspective view showing the distal end portion 234 and the hood 280 of the endoscope of the third embodiment, and showing the hood 280 before being attached to the distal end portion main body 236. FIG. 8 is a perspective view showing a state in which the hood 280 is attached to the tip body 236. In the description of the second embodiment shown in FIG. 7 and FIG. 8, the same or similar members as those in the first embodiment shown in FIG. 3 and FIG. is there.

  In the endoscope of the third embodiment, a groove portion 272 is provided in the distal end portion main body 236, and the hood 180 does not have a communication path, but has a communication hole 288. The distal end portion 34 and the hood of the first embodiment are provided. The configuration is different from that of 80.

  As shown in FIGS. 7 and 8, the outer wall surface 237 of the distal end portion main body 236 is provided with a groove portion 272 extending from the left observation means forming surface 64L to the proximal end side of the distal end portion main body 236. Further, the hood main body 281 has a communication hole 288 at a position corresponding to the groove 272 in a state where the hood 280 is attached to the tip end main body 236. When the hood 280 is attached to the distal end portion main body 236, a communication portion 287 is formed by the groove portion 272 and the communication hole 288 of the hood main body 281.

  According to the endoscope of the third embodiment, as shown by an arrow C in FIG. 8, air flows from the second space 70 on the outer peripheral side of the hood main body 281 into the first space 68 through the communication portion 287. Can be made. Therefore, according to the endoscope of the third embodiment, when the ultrasonic transducer 50 is brought into close contact with the body cavity wall, the body cavity wall is prevented from coming into close contact with the distal end body 36 by suction, and the observation field of view by the observation window 44 is reduced. Can be secured.

  Further, as shown in the sectional view of the main part of the hood main body 281 in FIG. 9, a valve 289 can be provided in the communication hole 288. As shown in FIG. 9, when the valve 289 is closed, that is, when there is no pressure difference between the first space 68 and the second space 70, the valve 289 blocks the communication hole 288. The second space 70 does not flow into the first space 68. When the valve 289 is opened, that is, when the first space 68 becomes negative pressure, the valve 289 is opened to the inner wall surface side of the hood main body 281, so that the second space 70 moves to the first space 68 as indicated by the arrow C. Air flows in.

  The shape of the groove part 272 is not particularly limited as long as air can flow from the second space 70 into the first space 68. As shown in FIGS. 7 and 8, the cross section may be an arcuate curved surface shape, or the cross section may be constituted by a plurality of planes such as a square shape.

  In the tip portions 34, 134, 234 and the hoods 80, 180, 280 of the first to third embodiments, the communication portions 87, 187, 287 are the tip portion main bodies of the hood main bodies 81, 181, 281. 36, 136, 236 on the left observation means forming surface 64L side. By providing the left observation means forming surface 64 </ b> L provided with the observation window 44, it becomes difficult for the body cavity wall to be in close contact with the observation window 44. If the negative pressure in the first space 68 can be suppressed, the communication portions 87, 187, 287 may be provided on the right observation means forming surface 64R side of the hood main bodies 81, 181, 281.

[Fourth Embodiment]
Next, an endoscope distal end 334 and an ultrasonic endoscope hood 380 (hereinafter simply referred to as a hood 380) according to a fourth embodiment will be described.

  FIG. 10 is a perspective view showing the distal end portion 334 and the hood 380 of the endoscope of the fourth embodiment, and showing the hood 380 before being attached to the distal end portion main body 336. FIG. 11 is a perspective view showing a state in which the hood 380 is attached to the distal end body 336. FIG. In the description of the fourth embodiment shown in FIG. 10 and FIG. 11, the same or similar members as those in the first embodiment shown in FIG. 3 and FIG. is there.

  The hood 380 of the fourth embodiment is different from the hood 80 of the first embodiment in that the hood 380 does not have a communication path and the hood body 381 has a first protrusion 390.

  The first projecting portion 390 is provided to project toward the distal end portion main body 336 at a position on the distal end side of the hood main body 381 on the opposite side of the notch portion 83 with respect to the notch portion 84 of the hood main body 381. . In FIGS. 10 and 11, the position of the corner of the boundary between the notch portion 84 and the front end side end 391 of the hood main body 381 is bent toward the front end portion main body 336 side, so that the first The protruding portion 390 is formed. When the hood 380 is attached to the outer wall surface 337 of the tip body 336, the first protrusion 390 comes into contact with the outer wall surface 337, thereby communicating between the inner wall surface of the hood body 381 and the outer wall surface 337. A portion 387 is formed.

  On the other hand, as described above, since the suction channel is connected to the treatment instrument insertion channel, suction is performed from the treatment instrument insertion channel. Therefore, the body cavity wall is brought into close contact with the treatment instrument outlet 58, and the third space 74 formed by the treatment instrument insertion channel opening 66 (see FIG. 2), the stand support section 62, and the treatment instrument outlet 58 is negative. It may become pressure. If the body cavity wall is in close contact with the treatment instrument outlet 58, the treatment position cannot be observed by the observation window 44, and the treatment cannot be reliably performed at the target position. Therefore, as shown in FIG. 11, a communication portion 387 is provided, and as shown by an arrow D in FIG. 11, the first space 68, that is, the space between the ultrasonic transducer 50 and the observation means forming surfaces 64L and 64R Since the negative pressure generated in the third space 74 can be suppressed by allowing air to flow into the third space 74, the body cavity wall can be prevented from coming into close contact with the treatment instrument outlet 58.

  The configuration of the first projecting portion 390 is not particularly limited as long as the communication portion 387 can be formed between the outer wall surface 337 of the tip end body 336 and the inner wall surface of the hood body 381. The communication path 390 can also be formed by providing a convex portion directed to the outer wall surface 337 at the corner of the boundary between the notch portion 84 and the tip end portion 391 of the hood main body 381.

[Fifth Embodiment]
Next, the endoscope distal end 434 and the ultrasonic endoscope hood 480 (hereinafter simply referred to as the hood 480) according to the fifth embodiment will be described.

  FIG. 12 is a perspective view showing the distal end portion 434 and the hood 480 of the endoscope according to the fifth embodiment, and showing the hood 480 before being attached to the distal end portion main body 436. FIG. 13 is a perspective view showing a state in which the hood 480 is attached to the tip end body 436. In the description of the fifth embodiment shown in FIG. 12 and FIG. 13, the same or similar members as those in the first embodiment shown in FIG. 3 and FIG. is there.

  In the endoscope of the fifth embodiment, the distal end body 436 is provided with a second protrusion 476, and the hood 480 does not have a communication path. It is a different configuration.

  The second protrusion 476 is provided on the outer wall surface 437 of the distal end portion main body 436 so as to protrude from the position adjacent to the treatment instrument outlet 58 and the right observation means forming surface 64R toward the inner wall surface of the hood main body 481. When the hood 480 is attached to the distal end main body 436, the second protrusion 476 is brought into contact with the inner wall surface of the hood main body 481, so that the inner wall surface of the hood main body 481 and the outer wall surface of the distal end body 436 are separated. A communication portion 487 is formed therebetween.

  According to the endoscope of the fifth embodiment, air can be caused to flow from the first space 68 to the third space 74 via the communication portion 487, as indicated by an arrow E in FIG. Thereby, since the negative pressure generated in the third space 74 can be suppressed, it is possible to prevent the body cavity wall from coming into close contact with the treatment instrument outlet 58.

[Sixth Embodiment]
Next, an endoscope distal end 534 and an ultrasonic endoscope hood 580 (hereinafter simply referred to as a hood 580) according to a sixth embodiment will be described.

  FIG. 14 is a perspective view showing the distal end portion 534 and the hood 580 of the endoscope of the sixth embodiment, and showing the hood 580 before being attached to the distal end portion main body 536. FIG. 14 is a perspective view showing a state in which the hood 580 is attached to the distal end portion 534. In the description of the sixth embodiment shown in FIG. 14 and FIG. 15, the same or similar members as those in the first embodiment shown in FIG. 3 and FIG. is there.

  The endoscope of the sixth embodiment is different in configuration from the distal end portion 34 and the hood 80 of the first embodiment in that a groove portion 572 is provided in the distal end portion main body 536 and the hood 580 does not have a communication path. .

  As shown in FIGS. 14 and 15, a groove 572 extending from the right observation means forming surface 64 </ b> R to the treatment instrument outlet 58 is provided on the outer wall surface 537 of the distal end body 536. When the hood 580 is attached to the distal end portion main body 536, a communication portion 587 is formed between the groove portion 572 and the inner wall surface of the hood main body 581.

  According to the endoscope of the sixth embodiment, air can be caused to flow from the first space 68 to the third space 74 via the communication portion 587 as indicated by an arrow F in FIG. Thereby, since the negative pressure generated in the third space 74 can be suppressed, it is possible to prevent the body cavity wall from coming into close contact with the treatment instrument outlet 58.

  The tip portions 334, 434, and 534 and the hoods 380, 480, and 580 of the fourth to sixth embodiments are used when the third space 74 is negative pressure and the first space 68 is open. Air can flow into the third space 74 from the first space 68, which is effective.

[Seventh Embodiment]
Next, an endoscope distal end 634 and an ultrasonic endoscope hood 680 (hereinafter simply referred to as a hood 680) according to a seventh embodiment will be described.

  FIG. 16 is a perspective view showing the distal end portion 634 and the hood 680 of the endoscope according to the seventh embodiment, and showing the hood 680 before being attached to the distal end portion main body 636. FIG. 17 is a perspective view showing a state in which the hood 680 is attached to the distal end body 636. In the description of the seventh embodiment shown in FIGS. 16 and 17, the same or similar members as those in the first embodiment shown in FIGS. 3 and 4 may be denoted by the same reference numerals and the description thereof may be omitted. is there.

  The endoscope of the seventh embodiment is different from the distal end portion 34 and the hood 80 of the first embodiment in that a communication path 685 is provided from the notch portion 84 of the hood 680 toward the proximal end side of the hood main body 681. It is.

  The communication path 685 is formed on the inner wall surface of the hood main body 681 by two frame members 692 extending from the notch portion 84 to the proximal end side of the hood main body 681, and the communication path 685 is defined between the frame members 692. Can do. When the hood main body 681 is attached to the outer wall surface 636 of the distal end portion main body 636, a communication portion 687 is formed by the communication path 685 and the outer wall surface of the distal end portion main body 636.

  According to the endoscope of the seventh embodiment, as indicated by an arrow G in FIG. 17, the opening 66 of the treatment instrument outlet 56 and the upright stand from the second space 70 which is the proximal end side space of the hood main body 681. Air can be allowed to flow into the third space 74 formed by the accommodating portion 62 and the treatment instrument outlet 56 via the communication portion 687. Thereby, since the negative pressure generated in the third space 74 can be suppressed, it is possible to prevent the body cavity wall from coming into close contact with the treatment instrument outlet 58.

[Eighth Embodiment]
Next, an endoscope distal end 734 and an ultrasonic endoscope hood 780 (hereinafter simply referred to as a hood 780) according to an eighth embodiment will be described.

  FIG. 18 is a perspective view showing the distal end portion 734 and the hood 780 of the endoscope according to the eighth embodiment, and showing the hood 780 before being attached to the distal end portion main body 736. FIG. 19 is a perspective view showing a state in which the hood 780 is attached to the distal end body 736. In the description of the eighth embodiment shown in FIG. 18 and FIG. 19, the same or similar members as those in the first embodiment shown in FIG. 3 and FIG. is there.

  The endoscope of the eighth embodiment is different in configuration from the distal end portion 34 and the hood 80 of the first embodiment in that a groove portion 772 is provided in the distal end portion body 736 and the hood 780 does not have a communication path. .

  As shown in FIGS. 18 and 19, a groove 772 extending from the treatment instrument outlet 56 to the proximal end side of the distal end portion body 736 is provided on the outer wall surface 737 of the distal end portion body 736. When the hood 780 is attached to the distal end portion main body 736, a communication portion 787 is formed by the groove portion 772 and the inner wall surface of the hood main body 780.

  According to the endoscope of the eighth embodiment, air can be caused to flow from the second space 70 to the third space 74 via the communication portion 787 as indicated by an arrow H in FIG. Thereby, since the negative pressure generated in the third space 74 can be suppressed, it is possible to prevent the body cavity wall from coming into close contact with the treatment instrument outlet 58.

[Ninth Embodiment]
Next, an endoscope distal end portion 834 and an ultrasonic endoscope hood 880 (hereinafter simply referred to as a hood 880) according to a ninth embodiment will be described.

  FIG. 20 is a perspective view showing the distal end portion 834 and the hood 880 of the endoscope of the ninth embodiment, and showing the hood 880 before being attached to the distal end portion main body 836. FIG. 21 is a perspective view showing a state in which the hood 880 is attached to the distal end body 836. In the description of the ninth embodiment shown in FIG. 20 and FIG. 21, the same or similar members as those in the first embodiment shown in FIG. 3 and FIG. is there.

  In the endoscope of the ninth embodiment, a groove portion 872 is provided in the distal end portion body 836, and the hood 880 does not have a communication path, and has a communication hole 288. The distal end portion 34 and the hood of the first embodiment are the same. This is a configuration different from

  As shown in FIGS. 20 and 21, the outer wall surface 837 of the distal end portion body 836 is provided with a groove portion 872 extending from the treatment instrument outlet 58 to the proximal end side of the distal end portion body 836. Further, the hood main body 881 has a communication hole 888 at a position corresponding to the groove portion 872 in a state where the hood 880 is attached to the distal end portion 834. When the hood 880 is attached to the distal end portion 834, a communication portion 887 is formed by the groove portion 872, the inner wall surface of the hood main body 881, and the communication hole 888.

  According to the endoscope of the ninth embodiment, air can be caused to flow from the second space 70 to the third space 74 through the communication portion 887 as indicated by an arrow I in FIG. Thereby, since the negative pressure generated in the third space 74 can be suppressed, it is possible to prevent the body cavity wall from coming into close contact with the treatment instrument outlet 58.

  In addition, a valve (not shown) can be provided in the communication hole 888 provided in the hood 880 similarly to the hood 288 of the endoscope of the third embodiment. By providing the valve, the inflow direction of air can be one direction from the second space 70 to the third space 74.

  In the distal end portions 634, 734, 834 and the hoods 680, 780, 880 of the endoscopes of the seventh to ninth embodiments, the third space 74 has a negative pressure, and the distal end portion main bodies 636, 736, 836 When the body cavity wall tends to be in close contact with the observation means forming surfaces 64L and 64R and air cannot flow from the first space 68, the air can flow into the third space 74 from the second space 70, which is effective. It is.

DESCRIPTION OF SYMBOLS 1 Ultrasonic endoscope 10 Operation part 12 Insertion part 14 Universal cord 16 Angle knob 18 Standing operation lever 20 Air supply / water supply button 22 Suction button 24 Treatment tool introduction port 30 Soft part 32 Bending part 34, 134, 234, 334, 434 534, 634, 734, 834 Tip portion 36, 136, 236, 336, 436, 536, 636, 736, 836 Tip portion main body 37, 137, 237, 337, 437, 537, 637, 737, 837 Outer wall surface 38 138 Axis 40 of distal end main body 42 Base portion 42 Extension portion 44 Observation window 46L, 46R Illumination window 48 Air supply / water supply nozzle 50 Ultrasonic transducer 52 Ultrasonic transmission / reception surface 56 Treatment instrument outlet 58 Treatment instrument outlet 60 Stand base 62 Stand base Housing 64L Left observation means forming surface 64R Right observation means forming surface 66 Opening 68 First sky 70 Second space 74 Third space 80, 180, 280, 380, 480, 580, 680, 780, 880 Ultrasound endoscope hood 81, 181, 281, 381, 481, 581, 681, 781, 881 Hood body 82 Mounting portion 83 Gutter-shaped portion 84 Notch portion 85, 685 Communication path 86 Projection strip portion 87, 187, 287, 387, 487, 587, 687, 787, 887 Communication portion 172, 272, 572, 772, 872 Groove parts 288, 888 Communicating hole 289 Valve 390 First projecting part 391 Front end part 476 Second projecting part 692 Frame member

Claims (18)

An ultrasonic transducer having an ultrasonic transducer;
A treatment instrument lead-out portion that is disposed on the proximal end side of the ultrasonic transducer and has a treatment tool lead-out port from which a treatment tool is led out, and a treatment tool lead-out portion that is disposed at a position adjacent to the treatment tool lead-out portion and observes the treatment portion. A tip body comprising an observation window;
A hood main body having a mounting portion to be mounted on the distal end main body, the distal end of the hood main body being disposed closer to the proximal end side than the ultrasonic transducer; A hood for an ultrasonic endoscope provided with a protruding hook-shaped portion,
At least one of the distal end portion main body and the hood main body has a communication portion, and the communication portion is a first space on the distal end side of the treatment instrument outlet portion and the observation window on the proximal end side from the ultrasonic transducer. And at least one of the second space on the base end side and the outer peripheral side of the hood main body.   2. The communication portion according to claim 1, wherein the communication portion is a communication path that is provided on an inner wall surface of the hood main body along the axial direction of the distal end portion main body and communicates the first space with the second space. Ultrasound endoscope.   The ultrasonic endoscope according to claim 1, wherein the communication portion is a groove portion provided on an outer wall surface of the distal end portion main body and extending from the first space to a proximal end side of the distal end portion main body. The communication part is
A groove provided on the outer wall surface of the tip body,
A communication hole provided in the hood main body and communicating the groove and the outer peripheral portion of the hood main body;
The ultrasonic endoscope according to claim 1, comprising:   The ultrasonic endoscope according to claim 4, wherein the communication hole has a valve in which gas flows in a direction from the outer peripheral portion toward the groove portion. An ultrasonic transducer having an ultrasonic transducer;
A distal end body disposed on the proximal end side of the ultrasonic transducer, wherein an opening for leading the treatment instrument from the distal end of the treatment instrument insertion channel and the treatment instrument derived from the opening are led out from the distal end body. A distal end body comprising: a treatment instrument outlet having a treatment instrument outlet, and an observation window disposed at a position adjacent to the treatment instrument outlet and observing the treatment section;
A hood main body having a mounting portion to be mounted on the distal end main body, the distal end of the hood main body being disposed closer to the proximal end side than the ultrasonic transducer; A hood for an ultrasonic endoscope provided with a protruding hook-shaped portion,
At least one of the distal end portion main body and the hood main body has a first space proximal to the ultrasonic transducer on the distal end side of the treatment instrument lead-out portion and the observation window, and the inside of the treatment tool lead-out portion. An ultrasonic endoscope having a communication portion that communicates a treatment instrument outlet and a third space between the opening. The hood body is
A notch formed at the formation position of the treatment instrument outlet,
A first projecting portion projecting toward the distal end portion main body side on the distal end side of the hood main body on the opposite side of the bowl-shaped portion with respect to the notch portion;
The ultrasonic endoscope according to claim 6, wherein the communication portion is formed by the first projecting portion, an inner wall surface of the hood main body, and an outer wall surface of the tip end main body. On the outer wall surface of the tip portion main body, there is a second protruding portion that protrudes toward the inner wall surface side of the hood main body,
The ultrasonic endoscope according to claim 6, wherein the communication portion is formed by the second projecting portion, an inner wall surface of the hood main body, and an outer wall surface of the tip end main body.   The ultrasonic endoscope according to claim 7, wherein the communication portion is a groove portion provided on an outer wall surface of the distal end main body and extending from the first space to the third space. An ultrasonic transducer having an ultrasonic transducer;
A distal end body disposed on the proximal end side of the ultrasonic transducer, wherein an opening for leading the treatment instrument from the distal end of the treatment instrument insertion channel and the treatment instrument derived from the opening are led out from the distal end body. A distal end body comprising: a treatment instrument outlet having a treatment instrument outlet, and an observation window disposed at a position adjacent to the treatment instrument outlet and observing the treatment section;
A hood main body having a mounting portion to be mounted on the distal end main body, the distal end of the hood main body being disposed closer to the proximal end side than the ultrasonic transducer; A hood for an ultrasonic endoscope provided with a protruding hook-shaped portion,
Communication that communicates at least one of the second space on the proximal end side and the outer peripheral side of the hood main body with the third space between the treatment instrument outlet and the opening in the treatment instrument outlet. Endoscopic endoscope having a section.   The ultrasonic endoscope according to claim 10, wherein the communication portion is a communication path that is provided on an inner wall surface of the hood main body and communicates the second space and the third space.   The ultrasonic endoscope according to claim 10, wherein the communication portion is a groove portion provided on an outer wall surface of the distal end portion main body and extending from the third space to the proximal end side of the distal end portion main body. The communication part is
A groove provided on the outer wall surface of the tip body,
A communication hole provided in the hood main body and communicating the groove and the outer peripheral portion of the hood main body;
The ultrasonic endoscope according to claim 10, comprising:   The ultrasonic endoscope according to claim 13, wherein the communication hole has a valve through which gas flows in a direction from the outer peripheral portion toward the groove portion. An ultrasonic transducer having an ultrasonic transducer;
A treatment instrument lead-out portion that is disposed on the proximal end side of the ultrasonic transducer and has a treatment tool lead-out port from which a treatment tool is led out, and a treatment tool lead-out portion that is disposed at a position adjacent to the treatment tool lead-out portion and observes the treatment portion. A hood for an ultrasonic endoscope used for an ultrasonic endoscope having an observation window and a tip body having an observation window,
A hood main body having a mounting portion to be mounted on the distal end main body, the distal end of the hood main body being disposed on the proximal side of the ultrasonic transducer;
A hook-shaped portion provided on the hood main body and projecting toward the observation visual field range of the observation window;
A hood for an ultrasonic endoscope, comprising: a communication path provided on an inner wall surface of the hood main body along an axial direction of the distal end main body. An ultrasonic transducer having an ultrasonic transducer;
A treatment instrument lead-out portion that is disposed on the proximal end side of the ultrasonic transducer and has a treatment tool lead-out port from which a treatment tool is led out, and a treatment tool lead-out portion that is disposed at a position adjacent to the treatment tool lead-out portion and observes the treatment portion. A hood for an ultrasonic endoscope used for an ultrasonic endoscope having an observation window and a distal end portion body provided on an outer wall surface and extending from the distal end side toward the treatment instrument outlet port Because
A hood main body having a mounting portion to be mounted on the distal end main body, the distal end of the hood main body being disposed on the proximal side of the ultrasonic transducer;
A hook-shaped portion provided on the hood main body and projecting toward the observation visual field range of the observation window;
A hood for an ultrasonic endoscope, comprising: a communication hole provided in the hood main body and communicating with the groove portion and the outer peripheral portion of the distal end portion main body. An ultrasonic transducer having an ultrasonic transducer;
A treatment instrument lead-out portion that is disposed on the proximal end side of the ultrasonic transducer and has a treatment tool lead-out port from which a treatment tool is led out, and a treatment tool lead-out portion that is disposed at a position adjacent to the treatment tool lead-out portion and observes the treatment portion. A hood for an ultrasonic endoscope used for an ultrasonic endoscope having an observation window and a tip body having an observation window,
A hood main body having a mounting portion to be mounted on the distal end main body, the distal end of the hood main body being disposed on the proximal side of the ultrasonic transducer;
A hook-shaped portion provided on the hood main body and projecting toward the observation visual field range of the observation window;
A notch formed at the formation position of the treatment instrument outlet,
A hood for an ultrasonic endoscope, comprising: an inner wall surface of the hood main body; and a first projecting portion provided on a tip side opposite to the bowl-shaped portion with respect to the notch portion. An ultrasonic transducer having an ultrasonic transducer;
A treatment instrument lead-out portion that is disposed on the proximal end side of the ultrasonic transducer and has a treatment tool lead-out port from which a treatment tool is led out, and a treatment tool lead-out portion that is disposed at a position adjacent to the treatment tool lead-out portion and observes the treatment portion. A hood for an ultrasonic endoscope used for an ultrasonic endoscope having an observation window and a tip body having an observation window,
A hood main body having a mounting portion to be mounted on the distal end main body, the distal end of the hood main body being disposed on the proximal side of the ultrasonic transducer;
A hook-shaped portion provided on the hood main body and projecting toward the observation visual field range of the observation window;
A notch formed at the formation position of the treatment instrument outlet,
A hood for an ultrasonic endoscope, comprising: a communication path provided on an inner wall surface of the hood main body and extending from the notch portion toward a proximal end side.

Images