WO2017134752A1 - 内視鏡処置具 - Google Patents
内視鏡処置具 Download PDFInfo
- Publication number
- WO2017134752A1 WO2017134752A1 PCT/JP2016/053106 JP2016053106W WO2017134752A1 WO 2017134752 A1 WO2017134752 A1 WO 2017134752A1 JP 2016053106 W JP2016053106 W JP 2016053106W WO 2017134752 A1 WO2017134752 A1 WO 2017134752A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- forceps
- sheath
- bracket
- forceps piece
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
- A61B1/00135—Oversleeves mounted on the endoscope prior to insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/015—Control of fluid supply or evacuation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1442—Probes having pivoting end effectors, e.g. forceps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
- A61B1/018—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/00234—Surgical instruments, devices or methods for minimally invasive surgery
- A61B2017/00238—Type of minimally invasive operation
- A61B2017/00269—Type of minimally invasive operation endoscopic mucosal resection EMR
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2901—Details of shaft
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2901—Details of shaft
- A61B2017/2905—Details of shaft flexible
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/28—Surgical forceps
- A61B17/29—Forceps for use in minimally invasive surgery
- A61B2017/2926—Details of heads or jaws
- A61B2017/2927—Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
- A61B2017/2929—Details of heads or jaws the angular position of the head being adjustable with respect to the shaft with a head rotatable about the longitudinal axis of the shaft
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00184—Moving parts
- A61B2018/00202—Moving parts rotating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2217/00—General characteristics of surgical instruments
- A61B2217/002—Auxiliary appliance
- A61B2217/007—Auxiliary appliance with irrigation system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
- A61B2218/002—Irrigation
Definitions
- the present invention relates to an endoscope treatment tool.
- a forceps part that is opened and closed by a wire is provided at the distal end of the sheath that is inserted into the channel of the endoscope, and the liquid guided through the flow path in the sheath is offset to the side of the forceps.
- Patent Document 1 when it is desired to change the direction of gripping the target site by the forceps portion, it is necessary to rotate the forceps portion together with the sheath. In such a structure, since the rotation of the forceps portion depends on the rotation transmission performance of the sheath, it may be difficult to adjust the gripping direction to a desired direction. On the other hand, in order to improve the rotation performance of the forceps portion in the prior art document 1, it is also conceivable to make the forceps portion relatively rotatable with respect to the sheath. However, in that case, depending on the rotation direction, the forceps piece may be positioned in front of the liquid feeding lumen, which may impede the flow of the fed liquid.
- the present invention has been made in view of the above-described circumstances, and can stably change the direction of gripping with the forceps while maintaining the position of the forceps constant, and rotate the forceps portion to forceps pieces.
- An object of the present invention is to provide an endoscopic treatment tool in which the forceps piece does not obstruct the flow of the liquid fed from the liquid feeding lumen even when the opening / closing direction of the needle is changed.
- One embodiment of the present invention includes a sheath capable of feeding a liquid, a sheath that can be inserted into a channel of an endoscope, and a pair of forceps disposed in a protruding state from a distal end cover provided at the distal end of the sheath
- a forceps portion including a piece and a bracket that supports the forceps piece so that the forceps piece can be opened and closed, and is connected to a proximal end of the forceps piece, and is advanced in the longitudinal direction in the duct of the sheath to open the forceps piece,
- An operation member that closes the forceps piece by being retracted, and a flow path that is fixed to the proximal end of the bracket and that is rotatable around the central axis of the sheath in the vicinity of the distal end of the sheath in the conduit.
- a flow path forming member that is disposed in a direction perpendicular to the opening and closing direction of the forceps piece with respect to the bracket and that is recessed inward in the radial direction, and is fed by a gap with the inner peripheral surface of the tip cover. Forming a hole That is an endoscope treatment instrument provided with a recess.
- the sheath is inserted into the channel of the endoscope, and the forceps portion protruding from the distal end cover provided at the distal end of the sheath is protruded from the distal end of the endoscope, and the proximal end side of the sheath
- the pair of forceps pieces of the forceps portion can be opened and closed to treat the target site.
- the bracket fixed to the flow path forming member and the forceps piece supported by the bracket so as to be openable / closable also move around the central axis of the sheath. Rotated.
- the forceps piece is rotated using the tip cover as a guide, the opening / closing direction of the forceps piece can be stably changed while maintaining the position of the forceps piece constant.
- the recess is arranged in a direction perpendicular to the opening / closing direction of the forceps piece with respect to the bracket that supports the forceps piece so as to be opened / closed, the forceps piece is not obstructed by the opening / closing operation of the forceps piece.
- the liquid can be fed forward.
- the liquid to be fed is not obstructed by the forceps piece, so that body fluids such as blood at the target site can be efficiently washed.
- the said recessed part may be provided in the both sides which pinch
- the forceps piece and the said operation member may consist of an electroconductive material which can flow a high frequency current.
- a forceps part can be used as a high frequency knife with the high frequency current supplied via the operation member. It is possible to switch between treatments involving gripping with forceps, cleaning with liquid feeding, local injection, or treatments involving cutting with a high-frequency knife while the endoscope treatment tool remains inserted into the endoscope channel. it can.
- the width dimension of the said opening / closing direction of the forceps piece may be smaller than the said bracket.
- the width dimension of the direction orthogonal to the said opening / closing direction of the said forceps piece may be smaller than the said bracket.
- FIG. 1 is an overall configuration diagram illustrating an enlarged distal end portion of an endoscope treatment tool according to an embodiment of the present invention, with a part thereof omitted.
- FIG. 2 is an enlarged longitudinal sectional view showing a state in which a forceps piece of the endoscope treatment tool in FIG. 1 is closed.
- FIG. 2 is an enlarged longitudinal sectional view showing a state in which a forceps piece of the endoscope treatment tool in FIG. 1 is opened.
- FIG. 2 is an enlarged longitudinal sectional view showing a cross section in a direction orthogonal to an opening / closing direction of a forceps piece of the endoscope treatment tool of FIG. 1. It is a perspective view which shows the flow-path formation member with which the endoscope treatment tool of FIG. 1 is equipped.
- FIG. 7 It is a front view of the endoscope treatment tool of FIG. It is a front view of the endoscope treatment tool of FIG. It is a front view which shows the state which rotated the forceps part of the endoscope treatment tool of FIG. 7 around the center axis
- An endoscope treatment tool 1 according to an embodiment of the present invention is a treatment tool in which a distal end is introduced into a body through a channel provided in an insertion portion of an endoscope, for example, as shown in FIG.
- a flexible sheath 2 formed into an elongated cylindrical shape that can be inserted into the channel, a forceps portion 3 having a pair of forceps pieces 3 a disposed so as to protrude from the distal end opening of the sheath 2, and the sheath 2
- An operation portion 4 that opens and closes the forceps piece 3a by pushing and pulling at the proximal end of the wire, a wire 4f that transmits the tension generated by the operation portion 4 to the forceps piece 3a, an operation member 4d, and an inner hole of the sheath 2
- a liquid feeding means 5 for feeding a liquid from the tip of a tip cover 30 to be described later via a flow path (pipe) 2a constituted by
- the sheath 2 includes a sheath body 20 and a distal end cover 30 fixed to the distal end of the sheath body 20.
- the sheath body 20 includes a coil sheath 21 having an inner diameter larger than the diameter of the wire 4f, and a cylindrical resin sheath 22 that covers the outer surface of the coil sheath 21.
- the tip cover 30 is a hard member such as metal and has an outer diameter that is substantially the same as the outer diameter of the resin sheath 22.
- the tip of the tip cover 30 is provided with a hook-like portion 2b extending inward in the radial direction and reducing the diameter of the flow path 2a.
- the inner surface of the distal end cover 30 is provided with an abutting portion 2c that protrudes inward in the radial direction at a position spaced a predetermined distance from the flange portion 2b to the base end.
- the forceps portion 3 includes a bracket 3 c that supports a pair of forceps pieces 3 a by a swing shaft 3 b so as to be swingable.
- the pair of forceps pieces 3a is connected to the operation member 4d via a link mechanism 6 provided on the base end side thereof.
- the pair of forceps pieces 3a are swung around the swing shaft 3b in the opening direction.
- the width dimension in the opening / closing direction of the forceps piece 3a and the width dimension in the direction orthogonal to the opening / closing direction are both set smaller than those of the bracket 3c.
- a flow path forming member 7 having a central hole (through hole) 7a through which the operation member 4d passes is fixed integrally to the proximal end of the bracket 3c of the forceps portion 3.
- the flow path forming member 7 is formed in a disc shape having a diameter slightly smaller than the inner diameter of the tip cover 30 and larger than the inner diameter of the flange-shaped portion 2b, and the inner diameter of the flange-shaped portion 2b on both sides of the central hole 7a.
- a concave portion 7b that is recessed to a sufficiently smaller radial position is provided.
- the recess 7b has a shape in which the outer peripheral surface of the flow path forming member 7 is cut out by two planes parallel to the axis of the central hole 7a. Further, as shown in FIGS. 6 and 7, the recesses 7 b are arranged at both side positions sandwiching the bracket 3 c in a direction perpendicular to the opening / closing direction of the pair of forceps pieces 3 a supported by the bracket 3 c. Accordingly, the second liquid feed hole 8 (shown by hatching in FIGS. 6 to 8) for feeding the liquid guided through the sheath 2 forward by the gap between the inner peripheral surface of the tip cover 30 and the recess 7b. Part).
- the abutting portion 2 c protrudes to a radial position where the entire circumference is smaller than the maximum diameter of the flow path forming member 7 and larger than the concave portion 7 b.
- the flow path forming member 7 has a thickness dimension slightly smaller than the distance dimension between the flange-shaped part 2b and the abutting part 2c, and is disposed at a position sandwiched between the flange-shaped part 2b and the abutting part 2c. Has been. Thereby, the flow path forming member 7 is provided to be rotatable around the central axis of the sheath 2.
- the operation member 4d is disposed on the proximal end side with respect to the small-diameter portion 4d1 that can pass through the central hole 7a of the flow path forming member 7, and the central hole 7a. And a large-diameter portion 4d2 having a larger outer diameter.
- the 1st liquid feeding hole 9 is comprised by the clearance gap between the small diameter part 4d1 of the operation member 4d, and the center hole 7a.
- the operation member 4d, the link mechanism 6, the forceps piece 3a, the coil sheath 21, the tip cover 30, the bracket 3c, and the flow path forming member 7 are made of a conductive material that can flow a high-frequency current. Yes.
- the operation unit 4 includes a handle 4b having a finger hooking hole 4a attached to the proximal end side of the sheath 2, and a movable unit 4c provided to be movable in the longitudinal axis direction of the sheath 2 with respect to the handle 4b.
- reference numeral 4e denotes a finger hole provided in the movable portion 4c.
- a connection port 10 that communicates with the flow path 2a of the sheath 2 is provided in the handle 4b.
- the liquid feeding means 5 is a syringe or a pump connected to the connection port 10, and a liquid such as physiological saline can be fed into the flow path 2 a of the sheath 2 by the operation of the liquid feeding means 5. Yes.
- the operation unit 4 is operated to close the forceps piece 3a as shown in FIG.
- the sheath 2 is introduced into the body from the distal end side through the channel of the insertion portion of the endoscope, and the distal end of the sheath 2 is projected from the distal end of the insertion portion of the endoscope.
- the forceps piece 3a arranged at the distal end of the sheath 2 enters the field of view of the endoscope, the operator performs the treatment while confirming the image acquired by the endoscope on the monitor.
- the forceps piece 3a can be used as a high-frequency knife.
- Such an endoscopic submucosal dissection using the endoscope treatment tool 1 according to the present embodiment will be described along the flow of the procedure as follows.
- a closed forceps piece 3a is inserted into the submucosal layer of a site that is considered to be a lesion to be excised in the endoscopic image displayed on the monitor, and a liquid such as physiological saline is injected by the liquid feeding means 5. To raise the lesion.
- the large diameter portion 4d2 of the operation member 4d opens the first liquid feeding hole 9, and the coil sheath 21 flows.
- the liquid guided to the tip in the path 2a is fed forward from both the first liquid feeding hole 9 and the second liquid feeding hole 8.
- the cross-sectional area of the flow path 2a can be widened, and a large flow rate of liquid can be fed.
- a highly viscous liquid such as hyaluronic acid is used as a liquid for raising the lesion site, the liquid can be easily fed by ensuring a wide cross-sectional area of the flow path 2a. There is an advantage.
- an initial incision is made in which holes are made in a plurality of places spaced in the circumferential direction in a part of the mucous membrane around the lesion site. Then, the forceps piece 3a in a closed state is inserted into the hole formed in the initial incision, and a high-frequency current is supplied to the forceps piece 3a through the operation member 4d, while the forceps piece a intersects the longitudinal axis. By moving in the incision direction, the mucosa around the lesion can be excised.
- the liquid feeding means 5 is operated to supply liquid into the flow path 2a of the coil sheath 21, and the bleeding site is washed away. Can be clarified to facilitate the treatment of hemostasis.
- the operator moves the movable portion 4c toward the distal end side with respect to the handle 4b of the operation portion 4 to thereby push the pressing force via the operation member 4d. Is supplied to the link mechanism 6 and is swung in a direction to open the pair of forceps pieces 3a. Then, by applying a twisting force to the operation member 4d, the flow path forming member 7, the bracket 3c, and the forceps piece 3a are rotated around the central axis of the sheath 2 with respect to the sheath 2, and the opening / closing direction of the forceps piece 3a is adjusted. be able to.
- the forceps piece 3a is rotated around the central axis of the tip cover 30 while being supported by the tip cover 30, the forceps piece 3a is compared with the case where the forceps piece 3a is rotated together with the endoscope treatment tool 1.
- the rotation operation is supported by the tip cover 30 and there is an advantage that the opening / closing direction can be changed stably without greatly changing the position of the forceps piece 3a.
- the traction force is applied to the link mechanism 6 via the operation member 4d by moving the movable portion 4c to the proximal side with respect to the handle 4b. Then, the pair of forceps pieces 3a are swung in the closing direction. Thereby, a treatment such as grasping and removing the mucous membrane between the pair of forceps pieces 3a can be performed.
- the liquid feeding means 5 is operated to feed a liquid such as physiological saline through the flow path 2a of the coil sheath 21.
- the second liquid feeding hole 8 is formed by a gap between the concave portion 7b of the flow path forming member 7 and the inner surface of the tip cover 30, and the concave portion 7b is perpendicular to the opening / closing direction of the forceps piece 3a. Since it is arranged at a position sandwiched in the direction, the liquid fed from the second liquid feeding hole 8 is fed straight forward without being obstructed by the open forceps piece 3a. Thereby, the liquid of the target part can be more reliably washed.
- the position of the recess 7b is always arranged at a position sandwiching the bracket 3c in a direction perpendicular to the opening / closing direction of the forceps piece 3a, as shown in FIG.
- the liquid fed from the second liquid feeding hole 8 can be fed straight forward.
- the width dimension in the opening / closing direction of the forceps piece 3a and the width dimension in the direction orthogonal to the opening / closing direction are both smaller than the width dimension of the bracket 3c. Therefore, in a state where the forceps piece 3a is closed, the forceps piece 3a does not interfere with the liquid fed from the second liquid feeding hole 8, and the current density of the supplied high-frequency current is set to the forceps piece 3a. There is an advantage that the efficiency of incision can be improved when used as a high-frequency knife because it can be raised in position.
- the forceps piece 3a can be used as a high-frequency knife and a grasping forceps, and the forceps piece 3a is in a closed state or an open state. Also, it can be used for cleaning or local injection by feeding liquid forward. Therefore, in the above endoscopic submucosal dissection, it is not necessary to insert / remove a plurality of treatment tools into / from the endoscope channel, with the endoscope treatment tool 1 according to the present embodiment being inserted, There is also the advantage that treatment can be performed from beginning to end.
- the forceps piece 3a does not interfere with the liquid feeding while the second liquid feeding hole 8 is disposed radially outside the forceps portion 3. Can be.
- a sufficient liquid feeding amount can be secured without making the size of the forceps portion 3 unnecessarily large, so that insertion into the endoscope channel and the patient's body is possible.
- the second liquid supply holes 8 are provided on both sides of the bracket 3c in a direction perpendicular to the opening / closing direction of the forceps piece 3a. Instead, only one side is provided. May be provided.
- the shape of the concave portion 7b constituting the second liquid feeding hole 8 is not limited to a shape in which the outer peripheral surface of the disk-shaped flow path forming member 7 is cut out by a flat surface, and other arbitrary shapes are adopted. Can do.
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Abstract
Description
一方、先行文献1において鉗子部の回転性能を向上させるために、シースに対して鉗子部を相対的に回転可能な構造にする事も考えられる。しかしその場合には、回転方向によっては鉗子片が送液ルーメンの前方に位置してしまうことで、送液された液体の流れを妨げる可能性がある。
本発明は、上述した事情に鑑みてなされたものであって、鉗子の位置を一定に維持しながら、鉗子による把持の方向を安定的に変更することができ、かつ鉗子部を回転させ鉗子片の開閉方向を変化させても、鉗子片が送液ルーメンから送液された液体の流れを妨げない内視鏡処置具を提供することを目的としている。
このようにすることで、ブラケットを挟んだ両側に形成された送液孔から液体を前方の目的部位に向けて送液することができる。送液によりシースに加わる力をシースの中心軸に対して均等にして送液時にシースを安定させることができる。また、前方の障害物により一方の送液孔からの送液が阻害されても他方の送液孔から送液される液体によって洗浄等を行うことができる。
このようにすることで、操作部材を介して供給した高周波電流によって鉗子部を高周波ナイフとして使用することができる。鉗子部による把持を伴う処置、送液による洗浄や局注あるいは、高周波ナイフによる切断を伴う処置を内視鏡のチャネルに対して内視鏡処置具を挿入したままの状態で切り替えて行うことができる。
また、上記態様においては、前記鉗子片の前記開閉方向に直交する方向の幅寸法が、前記ブラケットより小さくてもよい。
このようにすることで、鉗子部における高周波電流の密度を増大させることができ、切断作業を容易に行うことができる。また、送液された液体の方向を妨げることもなくなる。
本実施形態に係る内視鏡処置具1は、例えば、内視鏡の挿入部に設けられたチャネルを介して先端が体内に導入される処置具であって、図1に示されるように、チャネル内に挿入可能な細長い円筒状に形成され、可撓性を有するシース2と、該シース2の先端開口から突出した状態に配置された一対の鉗子片3aを有する鉗子部3と、シース2の基端側において押し引きすることにより鉗子片3aを開閉動作させる操作部4と、該操作部4により発生した張力を鉗子片3aまで伝達するワイヤ4f、操作部材4dと、シース2の内孔により構成された流路(管路)2aを経由して後述する先端カバー30の先端から液体を送液させる送液手段5とを備えている。
先端カバー30は、金属等の硬質な部材で、外径が樹脂シース22の外径と略同径に形成されている。
鉗子片3aの開閉方向の幅寸法および開閉方向に直交する方向の幅寸法は、いずれもブラケット3cよりも小さく設定されている。
そして、流路形成部材7は、鍔状部2bと突き当て部2cとの間隔寸法より若干小さい厚さ寸法を有し、鍔状部2bと突き当て部2cとの間に挟まれる位置に配置されている。これにより、流路形成部材7は、シース2の中心軸回りに回転可能に設けられている。
ワイヤ4fの基端側には図示しない電源が接続されており、操作部材4dを介して鉗子片3aに高周波電流を供給することができるようになっている。
送液手段5は、接続口10に接続されるシリンジあるいはポンプ等であり、送液手段5の作動によって生理食塩水のような液体をシース2の流路2aに送り込むことができるようになっている。
本実施形態に係る内視鏡処置具1を使用して、内視鏡的粘膜下層剥離術を行うには、操作部4を操作して、図2に示されるように、鉗子片3aを閉じた状態で、内視鏡の挿入部のチャネルを介してシース2を先端側から体内に導入していき、内視鏡の挿入部の先端からシース2の先端を突出させる。
最初に、モニタに表示された内視鏡画像において切除すべき病変と思われる部位の粘膜下層に閉じた状態の鉗子片3aを刺して、送液手段5によって生理食塩水等の液体を注入して病変部位を隆起させる。
そして、初期切開において形成しておいた穴内に閉じた状態の鉗子片3aを挿入し、操作部材4dを介して鉗子片3aに高周波電流を供給しながら、鉗子片aを長手軸に交差する所定の切開方向に移動させることにより、病変部位の周囲の粘膜を切除していくことができる。
また、病変部位の周囲の粘膜を切開する際に出血が発生した場合には、送液手段5を作動させて、コイルシース21の流路2a内に液体を供給し、出血を洗い流して出血した部位を明確にし、止血の処置を行い易くすることができる。
これにより、粘膜を把持するために鉗子片3aを開いた待機状態のままで、液体を送液して粘膜を洗浄し、確認された粘膜を、鉗子片3aによって即座に把持することができる。
また、第2の送液孔8を構成する凹部7bの形状は、円板状の流路形成部材7の外周面を平面によって切り欠いた形状のみならず、他の任意の形状を採用することができる。
2 シース
2a 流路(管路)
3 鉗子部
3a 鉗子片
3c ブラケット
4d 操作部材
7 流路形成部材
7b 凹部
8 第2の送液孔(送液孔)
9 第1の送液孔(送液孔)
30 先端カバー
Claims (5)
- 送液可能な管路を有し、内視鏡のチャネル内に挿入可能なシースと、
該シースの先端に設けられた先端カバーより突出状態に配置される一対の鉗子片および該鉗子片を開閉可能に支持するブラケットを備える鉗子部と、
該鉗子片の基端に接続され、前記シースの前記管路内において長手方向に前進させられることにより前記鉗子片を開き、後退させられることにより前記鉗子片を閉じる操作部材と、
前記ブラケットの基端に固定され、前記シースの前記管路内の先端近傍において、前記シースの中心軸回りに回転可能に配置された流路形成部材とを備え、
該流路形成部材が、前記ブラケットに対し前記鉗子片の開閉方向に直交する方向に配置され径方向内方に窪んで前記先端カバーの内周面との隙間により送液孔を形成する凹部を備える内視鏡処置具。 - 前記凹部が、前記ブラケットを前記鉗子片の開閉方向に直交する方向に挟む両側に設けられている請求項1に記載の内視鏡処置具。
- 前記鉗子片および前記操作部材が、高周波電流を流すことのできる導電性材料からなる請求項1または請求項2に記載の内視鏡処置具。
- 前記鉗子片の前記開閉方向の幅寸法が、前記ブラケットより小さい請求項1から請求項3のいずれかに記載の内視鏡処置具。
- 前記鉗子片の前記開閉方向に直交する方向の幅寸法が、前記ブラケットより小さい請求項1から請求項4のいずれかに記載の内視鏡処置具。
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| CN202111079299.0A CN113813017B (zh) | 2016-02-02 | 2016-02-02 | 内窥镜处置器具 |
| EP16889242.0A EP3412235B1 (en) | 2016-02-02 | 2016-02-02 | Endoscopic instrument |
| PCT/JP2016/053106 WO2017134752A1 (ja) | 2016-02-02 | 2016-02-02 | 内視鏡処置具 |
| CN202111079536.3A CN113813018B (zh) | 2016-02-02 | 2016-02-02 | 内窥镜处置器具 |
| CN201680080735.7A CN108601617B (zh) | 2016-02-02 | 2016-02-02 | 内窥镜处置器具 |
| JP2017526147A JP6216482B1 (ja) | 2016-02-02 | 2016-02-02 | 内視鏡処置具 |
| US16/046,465 US10973540B2 (en) | 2016-02-02 | 2018-07-26 | Endoscopic surgical device |
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| EP (1) | EP3412235B1 (ja) |
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| Publication number | Publication date |
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| CN113813018B (zh) | 2023-10-31 |
| CN113813017A (zh) | 2021-12-21 |
| US10973540B2 (en) | 2021-04-13 |
| US20180368869A1 (en) | 2018-12-27 |
| CN108601617B (zh) | 2021-10-08 |
| EP3412235A4 (en) | 2019-10-02 |
| CN113813018A (zh) | 2021-12-21 |
| JPWO2017134752A1 (ja) | 2018-02-08 |
| EP3412235A1 (en) | 2018-12-12 |
| CN108601617A (zh) | 2018-09-28 |
| JP6216482B1 (ja) | 2017-10-18 |
| EP3412235B1 (en) | 2023-02-01 |
| CN113813017B (zh) | 2024-08-02 |
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