JP2010162054A - Mechanism of puncture needle guide - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanism of puncture needle guide which can be mounted on probes having various lengths and to cope with the diameters of various puncture needles. <P>SOLUTION: A first slide mechanism 34 is provided striding over a first guide tube 26 and a second guide tube 28. Thus, the length of a needle guide part 24 can be adjusted. Also, the second guide tube 28 is provided with a second slide mechanism 36. Thus, a second mounting part 32 can be slid in the axial direction. A second pipe and an entrance guide 42 on the front side of the second guide tube 28 have an inner diameter corresponding to the diameter of the puncture needle. That is, the plurality of second pipes and the plurality of entrance guides are prepared, and the ones corresponding to the diameter of the puncture needle to be used are utilized from them. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a puncture needle guide mechanism, and more particularly, to a mechanism that guides a puncture needle attached to an ultrasonic probe inserted into a living body.

  As an intracavity ultrasonic probe, a transrectal probe, a transvaginal probe, and the like are known. For example, when performing tissue ultrasound or drug injection with a puncture needle while performing ultrasound diagnosis of the prostate using a transrectal probe, the transrectal probe may be referred to as a puncture needle guide mechanism (puncture adapter, puncture attachment). Is attached (Patent Document 1). The puncture needle guide mechanism is normally detachably attached to a rod-like insertion portion of the probe to guide the puncture needle.

  Conventionally, the puncture needle guide mechanism is manufactured as a dedicated product in accordance with the form of the probe to which it is attached. Therefore, a dedicated puncture needle guide mechanism is produced for each of the plurality of probes having different insertion portions. Even in a minor change in which only the length of the insertion portion is changed while maintaining the basic shape of the insertion portion, the exclusive product must be redesigned and remanufactured. It is cumbersome to prepare another dedicated product only with different lengths, and there is a problem of cost increase.

  On the other hand, there are puncture needles having various diameters. One puncture needle guide mechanism corresponds to one or a plurality of puncture needles. However, when a puncture needle exceeding the acceptable range is used, another corresponding puncture needle guide mechanism must be used. Don't be.

JP 2006-288773 A

  As described above, in the conventional puncture needle guide mechanism, the probes that can be mounted are basically limited, and the acceptable puncture needles are also limited. In other words, the manufacture as a dedicated product is fundamental, and the puncture needle guide mechanism has not been generalized or semi-generalized. For this reason, there has been a problem that the use efficiency cannot be increased and the cost is increased.

  It is an object of the present invention to solve the problems caused by using a dedicated puncture needle guide mechanism.

  Another object of the present invention is to provide a puncture needle guide mechanism that can be attached to several types of probes.

  Another object of the present invention is to provide a puncture needle guide mechanism that can accept several types of puncture needles.

  The present invention relates to a puncture needle guide mechanism that is detachably provided on an ultrasonic probe inserted into a body cavity, and has a form extending in the axial direction of the ultrasonic probe and guides the puncture needle A guide part; a first attachment part attached to the first part of the ultrasonic probe while holding the needle guide part; and a second part of the ultrasonic probe while holding the needle guide part. A second guide part attached to the first guide part, the needle guide part being a first guide pipe held by the first attachment part, and a pipe connected to the first guide pipe, A second guide tube provided so as to be slidable in the axial direction with respect to the one guide tube, and a first slide structure is provided at a connecting portion between the first guide tube and the second guide tube. It is characterized by that.

  According to the above configuration, since the slide structure is provided at the connecting portion between the first guide tube and the second guide tube, the relative positional relationship between the first guide tube and the second guide tube is changed in the axial direction. It is possible. Therefore, the overall length of the puncture needle guide mechanism can be easily varied in accordance with the axial dimension (length) of the ultrasonic probe to be mounted. Since the needle guide portion is not a single pipe but is constituted by two parts, ie, a first guide pipe and a second guide pipe, it is easy to replace one of them. The second guide tube itself may be composed of a plurality of pipes. Similarly, the first guide tube itself may be composed of a plurality of pipes.

  Preferably, a first fixing mechanism for fixing a slide position of the second guide tube with respect to the first guide tube is included. According to this structure, since the full length of a needle guide part can be set fixedly, it is convenient. Preferably, the first slide structure is a structure in which one guide tube partially enters the other guide tube of the first guide tube and the second guide tube, and the first fixing mechanism includes: It is a mechanism for fixing the amount of insertion of the other guide tube with respect to the one guide tube. According to this configuration, the slide position can be reliably maintained with a simple configuration.

  Desirably, the first part is an external position in the rod-like insertion part of the ultrasonic probe, the second part is an inward part of the rod-like insertion part, and the needle guide part is from the first part. It has a form extending beyond the second part to the vicinity of the tip of the rod-shaped insertion part, and the connecting portion of the first guide tube and the second guide tube is between the first part and the second part. And the second guide tube is held by the second mounting portion. According to this configuration, the positional relationship between the first guide tube and the second guide tube can be adjusted using the first slide mechanism according to the length between the first portion and the second portion. That is, the length of the needle guide portion can be easily adapted to the length of the rod-like insertion portion.

  Preferably, a second slide structure is provided in a connecting portion between the second mounting portion and the second guide tube so as to slide both relative to each other in the axial direction, and the second guide tube with respect to the second mounting portion. A second fixing mechanism that fixes the slide position is included, and the amount of protrusion from the second portion to the tip position of the second guide tube can be varied. According to this configuration, since the relative position of the second mounting portion with respect to the second guide tube can be changed by the second slide mechanism, the second part of the ultrasonic probe changes or is changed from the second part. When the distance to the tip changes, it becomes possible to cope with it. Although it is possible to provide only the second slide mechanism without providing the first slide mechanism, if both are provided, the mounting target can be further expanded.

  Preferably, the second guide tube includes a second guide tube body that is slidably connected to the first guide tube, and an exchange portion that is replaceably connected to the second guide tube body. The replacement part constitutes a body-inside replacement part corresponding to a puncture needle having a predetermined diameter. Preferably, an outer side exchange portion corresponding to the puncture needle having the predetermined diameter is provided at an outer side end portion of the first guide tube. According to these configurations, it is possible to deal with puncture needles having different thicknesses by simply exchanging a part of the puncture needle guide mechanism.

  Desirably, a plurality of pairs of the inner exchange part and the outer exchange part are prepared corresponding to a plurality of puncture needles having different diameters, and the diameter of the puncture needle to be used is selected from the plurality of exchange part pairs. The optimal pair is selectively used accordingly.

  As described above, according to the present invention, it is possible to provide a puncture needle guide mechanism that can be attached to several types of probes. Or according to this invention, the puncture needle guide mechanism which can accept several types of puncture needles can be provided. Therefore, the practicality of the puncture needle guide mechanism can be improved.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  In FIG. 1, a straight probe 10 is shown. The straight probe 10 is a body cavity insertion type ultrasonic probe that is inserted into the rectum of a subject. For example, when puncturing the prostate while performing ultrasonic diagnosis, the puncture needle guide mechanism 12 shown in FIG. 1 is used. The puncture needle guide mechanism 12 is detachably attached to the transversal probe 10. The puncture needle guide mechanism 12 in the present embodiment has a plurality of slide mechanisms and has a special structure for guiding a plurality of puncture needles having different diameters. In FIG. 1, the puncture needle itself is not shown.

  The straight probe 10 is roughly composed of a rod-shaped portion 14 and a grip portion 16. The grip part 16 has a shape in which the lower half has a semi-cylindrical shape and the upper half is largely cut off. Reference numeral 16 </ b> A represents the upper surface of the grip portion 16. The rod-shaped portion 14 is an insertion portion to be inserted into the rectum, and the front side thereof is a tip portion 20 and the rear side thereof is a root portion 22. The root portion 22 is positioned outside the body. Between the tip portion 20 and the root portion 22 is the main body 18 of the rod-like portion 14. The tip portion 20 is slightly enlarged with respect to the main body 18. An array transducer composed of a plurality of transducer elements is provided inside the tip portion 20. An ultrasonic beam is formed by the array transducer, and the ultrasonic beam is scanned electronically. Thereby, a beam scanning surface is formed. The tip portion 20 is provided with a pair of notches 20A on the left and right. The root portion 22 is slightly larger than the main body 18, and the root portion 22 is formed with a groove 22A along the circumferential direction. The puncture needle guide mechanism 12 according to the present embodiment can correspond to a plurality of types of straight probe having different lengths of the main body 18 and can correspond to a plurality of straight probes having different sizes in the axial direction at the distal end portion 20. It is.

  FIG. 2 shows the puncture needle guide mechanism 12 as an enlarged view. The puncture needle guide mechanism 12 has a needle guide portion 24 that guides the puncture needle or forms a hollow cover. In the present embodiment, the needle guide portion 24 includes a first guide tube 26 and a second guide tube 28. The first guide tube 26 and the second guide tube 28 are both pipe-shaped members, and the front end of the first guide tube 26 and the rear end of the second guide tube 28 are engaged with each other. A first slide mechanism 34 is configured.

  A first mounting portion 30 is provided on the rear end side of the first guide tube 26. The first mounting portion 30 has a pair of arms 38 and 40 that are fitted into the groove 22A shown in FIG. The pair of arms 38 and 40 are members that can be opened and closed. The first attachment portion 30 is attached to a predetermined part (first part) of the straight probe, and in this embodiment, the attachment part is a fundamental part shown in FIG. In the first mounting portion 30, an inlet guide 42 is detachably attached to the rear end of the first guide tube 26. In this embodiment, a plurality of types of entrance guides 42 are prepared, and a predetermined entrance guide 42 corresponding to the diameter of the puncture needle is selected and attached to the first guide tube 26.

  A second mounting portion 32 is provided on the front end side of the second guide tube 28. A second slide mechanism 36 is provided to position the second mounting portion 32 in the axial direction with respect to the second guide tube 28. The second mounting portion 32 is a means for mounting the puncture needle guide mechanism 12 together with the first mounting portion 30 to the rod-shaped portion of the straight probe, and the second mounting portion 32 is located behind the distal end portion shown in FIG. In other words, it is mounted on the tip side of the rod-like body. Specifically, as will be described later, the second mounting portion 32 has an arch portion straddling the rod-shaped portion, and a pair of end portions of the arch portion are fitted into the pair of notches shown in FIG. .

  FIG. 3 shows an exploded perspective view of the puncture needle guide mechanism 12. The first slide mechanism 34 and the second slide mechanism 36 will be described with reference to FIG.

  The first slide mechanism 34 is composed of a first slide structure and a mechanism for fixing the slide position. Specifically, the front end 26A of the first guide tube 26 and the second guide tube 28 into which it is inserted (specifically). Specifically, an inner 44 and a clamping pipe 46 are provided in order to fix the amount of insertion of the first guide pipe 26 into the first pipe 50. They constitute a fixing mechanism. The outer peripheral surface of the rear end of the first pipe 50 is a screw portion 48, and a screw portion that engages with the screw portion 48 is formed on the inner surface of the fastening pipe 46.

  FIG. 4 shows a cross section of the first slide mechanism 34. As shown in the drawing, the front end 26A of the first guide tube is inserted into the rear end of the first pipe 50 by an arbitrary amount. In this state, the tightening pipe 46 is rotated in one direction, whereby the threaded portion 48 is obtained. The relative position of both of the first pipe 50 and the first guide is determined by the contact relationship between the inclined surface of the inner 44 and the inner inclined surface in the tightening pipe 46. The positional relationship with the tube 26 is fixed. If the fastening pipe 46 is rotated in the opposite direction, the fixed state can be easily eliminated. In addition, various things can be employ | adopted about a 1st slide mechanism, ie, a slide structure, and a fixing mechanism.

  Returning to FIG. 3, the second guide tube 28 includes a first pipe 50 and a second pipe 52. A threaded portion is formed on the inner surface of the front end side of the first pipe 50, while a threaded portion is also formed at the rear end of the second pipe 52. A second pipe 52 is connected to 50. In the present embodiment, a plurality of types of second pipes having different inner diameters are prepared corresponding to a plurality of diameters of the puncture needle, and the second pipes suitable for the diameter of the puncture needle to be used are selectively used. It's being used.

  FIG. 5 shows a cross section of the second slide mechanism 36. As described above, the threaded portion is formed inside the tip 50A of the first pipe 50, while the threaded portion 52A is formed at the rear end of the second pipe 52, and they are engaged with each other and fastened together. ing. Incidentally, the opening edge of the rear end opening of the second pipe 52 is cut obliquely, that is, a tapered surface 100 is formed. The tapered surface 100 can smoothly guide the puncture needle into the second pipe 52 when the tip of the puncture needle reaches the tapered surface 100. As described above, the second mounting portion 32 has the arch portion 54, and an intermediate portion thereof constitutes the slider 54A. The slider 54 </ b> A can slide in the axial direction on a slide groove 58 formed in the second pipe 52. Incidentally, the position of the second mounting portion 32 in the axial direction can be fixed by tightening the screw 56. The second mounting portion 32 is provided detachably with respect to the second pipe 52. The tip of the second pipe 52 is cut obliquely, and there is a tip opening 52A. Various mechanisms can be adopted for the second slide mechanism 36. In any case, if the relative position of the second mounting part 32 can be freely changed with respect to the second pipe 52, it is possible to cope with various forms of the straight probe.

  FIG. 6 shows a cross section of the rear end side of the needle guide portion. There, the first mounting portion 30 appears as a schematic cross section. The inside of the first guide tube 26 is a passage 26B. An inlet guide 42 is detachably attached to the rear end. A threaded portion is formed at the rear end of the first guide tube 26, while a threaded portion is also formed at the tip of the inlet guide 42, and they are screwed together so that An inlet guide 42 is attached.

  The inlet guide 42 has a cavity 60. In the cavity 60, an entrance opening for receiving the puncture needle is widened, from which the inner diameter is gradually reduced to form a tapered portion 60A, and a guide passage 60B as a pore is formed on the front side of the tapered portion 60A. Is configured. The guide passage 60B corresponds to the diameter of the puncture needle, that is, the shape of the cavity 60 is different in a plurality of types of entrance guides, and in particular, the inner diameter of the guide passage is different.

  In the present embodiment, as described above, the second pipe in the second guide tube is replaceable, and the second pipe that matches the diameter of the puncture needle can be selectively used. That is, the inside body exchange part is comprised there. On the other hand, in the present embodiment, a plurality of types of entrance guides are prepared corresponding to the number of diameters of the puncture needle, and an optimum entrance guide is selected and used. That is, the outside body replacement part is also formed on the rear end side of the needle guide part. In the present embodiment, a plurality of pairs of the body inside exchange part and the body outside exchange part are prepared, and the optimum pair is selectively used from the plurality of exchange part pairs according to the diameter of the puncture needle to be used. The As shown in FIG. 2 and the like, since the puncture needle guide mechanism 12 of the present embodiment has the first slide mechanism 34, the first portion where the first mounting portion is mounted and the second portion between the plurality of straight probes. Even if the mounting part is different from the second part to be mounted, a common puncture needle guide mechanism can be used. As a result, the puncture needle guide mechanism can be generalized or semi-generalized. In addition, since the second slide mechanism is provided, it is possible to position the second mounting portion at an optimal position even if the position of the second mounting portion is different in the axial direction between the plurality of straight probe. is there. Alternatively, even if the distance from the second portion to the probe tip surface is different, the second guide mechanism can be made to have the optimum length of the second guide tube.

  As described above, since the puncture needle guide mechanism according to the present embodiment has a plurality of slide mechanisms and an exchange function, it is possible to attach a common puncture needle guide mechanism to a plurality of types of straightness probes. Alternatively, the main part of the puncture needle guide mechanism can be shared. Therefore, there is an advantage that it is possible to provide a puncture needle guide mechanism with extremely high practicality. In addition, the mechanism shown as the 1st mounting part and the 2nd mounting part is an example, Comprising: Various mechanisms can be employ | adopted about those mounting parts. Similarly, various mechanisms can be employed for the first slide mechanism and the second slide mechanism.

It is a perspective view for demonstrating the use condition of the puncture needle guide mechanism which concerns on this invention. It is a perspective view of a puncture needle guide mechanism. It is a disassembled perspective view of a puncture needle guide mechanism. It is sectional drawing of a 1st slide mechanism. It is sectional drawing of a 2nd slide mechanism. It is sectional drawing of the rear end side of a needle guide part.

  DESCRIPTION OF SYMBOLS 10 Straight probe, 12 puncture needle guide mechanism, 14 stick-shaped part, 16 grip part, 18 main body, 20 tip part, 22 root part, 26 1st guide tube, 28 2nd guide tube, 30 1st mounting part, 32 1st 2 mounting part, 34 1st slide mechanism, 36 2nd slide mechanism.

Claims (8)

In the puncture needle guide mechanism detachably provided on the ultrasonic probe inserted into the body cavity,
A needle guide part having a shape extending in the axial direction of the ultrasonic probe and guiding a puncture needle;
A first attachment portion attached to a first portion of the ultrasonic probe while holding the needle guide portion;
A second attachment portion attached to a second portion of the ultrasonic probe while holding the needle guide portion;
Including
The needle guide is
A first guide tube held by the first mounting portion;
A second guide tube connected to the first guide tube, the second guide tube provided to be slidable in the axial direction with respect to the first guide tube;
Including
A puncture needle guide mechanism, wherein a first slide structure is provided at a connecting portion between the first guide tube and the second guide tube. The puncture needle guide mechanism according to claim 1,
A puncture needle guide mechanism comprising a first fixing mechanism for fixing a slide position of the second guide tube with respect to the first guide tube. The puncture needle guide mechanism according to claim 2,
The first slide structure is a structure in which one guide tube partially enters the other guide tube in the first guide tube and the second guide tube,
The puncture needle guide mechanism, wherein the first fixing mechanism is a mechanism for fixing an insertion amount of the other guide tube with respect to the one guide tube. The puncture needle guide mechanism according to claim 3,
The first part is a position external to the rod-like insertion part of the ultrasonic probe;
The second part is an inward part in the rod-like insertion part,
The needle guide part has a form extending from the first part to the vicinity of the tip part of the rod-like insertion part over the second part,
A connecting portion between the first guide tube and the second guide tube is set between the first portion and the second portion;
The puncture needle guide mechanism, wherein the second guide tube is held by the second mounting portion. The puncture needle guide mechanism according to claim 4,
A second slide structure is provided in the connecting portion between the second mounting portion and the second guide tube to cause both to slide relative to each other in the axial direction;
A second fixing mechanism for fixing the slide position of the second guide tube with respect to the second mounting portion;
A puncture needle guide mechanism characterized in that the amount of protrusion from the second part to the tip position of the second guide tube can be varied. In the puncture needle guide mechanism according to any one of claims 1 to 5,
The second guide tube is
A second guide tube main body slidably coupled to the first guide tube;
An exchange part connected to the second guide tube body in an exchangeable manner;
Consists of
The puncture needle guide mechanism, wherein the exchange portion constitutes an inside body exchange portion corresponding to a puncture needle having a predetermined diameter. The puncture needle guide mechanism according to claim 6,
A puncture needle guide mechanism, wherein an outer side exchange portion corresponding to the puncture needle having a predetermined diameter is provided at an outer end portion of the first guide tube. The puncture needle guide mechanism according to claim 7,
Corresponding to a plurality of puncture needles having different diameters, a plurality of pairs of the inner exchange part and the outer exchange part are prepared,
A puncture needle guide mechanism, wherein an optimal pair is selectively used according to a diameter of a puncture needle to be used from among the plurality of exchange unit pairs.

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