Surgical instrument

Abstract

To provide a surgical instrument capable of projecting a probe smoothly with comparatively small slide resistance, when using the probe in the projected state, and allowing for obtaining sensation of touching an organ through the probe.SOLUTION: A surgical instrument 10 includes: a shaft 11 with a through hole 21a, formed therein, and penetrating in the axial direction; a curved jacket 12 formed with a given curvature, and provided at a tip part of the shaft 11; a curved probe 13 received in the jacket 12 in a protrudable / retractable manner, and formed with the same curvature as the curvature of the jacket 12; and a trigger 15 provided on a base end part of the shaft 11, for protruding / retracting the probe 13.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a surgical instrument used, for example, when operating on a human or an animal.

Background Art

[0002] As this type of surgical instrument, there is disclosed one including a main body having a displacer at its tip, an insertion portion having a cylindrical member that houses the main body and is slidable, and an operation portion that operates the insertion portion, and including a bending member that holds the main body of the insertion portion in a curved shape, and a coil member that is curved and housed inside the bending member (Patent Document 1). This surgical instrument has a configuration in which the cylindrical member is slid in the direction of the insertion portion, the bending member and the coil member of the main body are linearly deformed and housed inside the cylindrical member, and the insertion portion is slid in the direction opposite to the insertion portion to project the insertion portion from the cylindrical member. Also, a surgical instrument 1 equipped with a probe 3 is used. As shown in FIG. 7, this surgical instrument 1 is composed of a shaft 2, a probe 3, and a handle 4. The surgical instrument 1 is configured to project the probe 3 housed inside the shaft 2 from the tip portion of the shaft 2 by rotating the handle 4. When housing the curved probe 3 in the shaft 2, the handle 4 is rotated to linearly deform the curved probe 3.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the device described in Patent Document 1, when the main body is accommodated in the cylindrical member, the curved member and the coil member are deformed linearly. Therefore, when the curved member and the coil member are protruded from the cylindrical member, a reaction force due to elastic deformation acts, and the sliding resistance generated between the curved member and the cylindrical member is relatively large. For this reason, when a medical practitioner performs an operation to protrude the tip, it is difficult to obtain a feeling of how much force the tip is touching the organ with. Also, in the surgical instrument 1 described in FIG. 7, when the probe 3 is accommodated inside the shaft 2, the curved probe 3 is forcibly deformed linearly. Therefore, when the probe 3 is protruded from the shaft 2, a reaction force due to elastic deformation acts, and the sliding resistance generated between the probe 3 and the shaft 2 is relatively large. For this reason, when a medical practitioner performs an operation to protrude the probe 3, it is difficult to obtain a feeling of how much force the tip is touching the organ with.

[0005] The present invention has been made to solve such problems, and an object of the present invention is to provide a surgical instrument that has a relatively small sliding resistance when the probe is protruded and used, can be smoothly protruded, and can obtain a feeling of touching an organ through the probe.

Means for Solving the Problems

[0006] (1) The surgical instrument according to the present invention includes a shaft in which a through hole penetrating in the axial direction is formed, a curved outer sleeve provided at the tip portion of the shaft and formed with a predetermined curvature, a curved probe formed with the same curvature as the curvature and accommodated in the outer sleeve so as to be insertable and removable, and a trigger provided at the proximal end portion of the shaft for inserting and removing the probe.

[0007] (2) The surgical instrument according to the present invention is the surgical instrument according to (l), further comprising a handle provided at the proximal end portion of the shaft for rotating the outer sleeve, wherein the outer sleeve is rotatably provided on the shaft.

[0008] (3) The surgical instrument according to the present invention is the surgical instrument described in (2), and is characterized by including a first link wire accommodated in the shaft for connecting the outer sleeve and the handle, and a second link wire accommodated in the shaft for connecting the probe and the trigger.

[0009] (4) The surgical instrument according to the present invention is the surgical instrument described in any one of (1) to (3), and is characterized in that a through hole for passing a thread is formed at the tip portion of the probe.

[0010] The surgical instrument according to the present invention described in the above (1) includes a shaft, a curved outer sleeve formed with a predetermined curvature, a curved probe that is movably accommodated in the outer sleeve and is formed with the same curvature as the predetermined curvature, and a trigger for moving the probe in and out.

[0011] With this configuration, in the surgical instrument according to the present invention, the probe is accommodated in the outer sleeve provided on the shaft, and the probe accommodated in the outer sleeve protrudes from the outer sleeve by operating the trigger, and the protruding probe is accommodated in the outer sleeve by operating the trigger. Since the probe is formed with the same curvature as the outer sleeve formed with a predetermined curvature, when the probe protrudes from the outer sleeve, the sliding resistance between the probe and the outer sleeve is reduced, and it can protrude smoothly. Medical staff using the surgical instrument according to the present invention can obtain the feeling of touching an organ through the probe during the operation.

[0012] The surgical instrument according to the present invention described in the above (2) is configured such that the outer sleeve is rotatably provided on the shaft, the handle is provided at the proximal end portion of the shaft, and the outer sleeve is rotated by the handle. With this configuration, the surgical instrument according to the present invention can take a state in which the outer sleeve is in a straight posture with respect to the shaft and a state in which the outer sleeve is inclined with respect to the shaft by operating the handle.

[0013] The surgical instrument according to the present invention described in (3) above has a first link wire that is housed inside the shaft and connects the outer sleeve and the handle, and a second link wire that is housed inside the shaft and connects the probe and the trigger. With this configuration, in the surgical instrument according to the present invention, the operation of the handle due to the operation of the handle is transmitted to the outer sleeve via the first link wire housed inside the shaft, and the operation of the trigger due to the operation of the trigger is transmitted to the probe via the second link wire housed inside the shaft. A medical worker using the surgical instrument according to the present invention can obtain, via the second link wire, the feeling of the probe touching an organ through the probe during surgery.

[0014] The surgical instrument according to the present invention described in (4) above has a through hole formed at the tip portion of the probe for passing a thread. With this configuration, a medical worker can perform a ligation procedure with a thread or tape passed through the through hole behind a luminal organ or blood vessel having a tubular or bag-like form by means of the probe inserted into the abdominal cavity.

Advantages of the Invention

[0015] According to the present invention, when the probe is protruded and used, it is possible to provide a surgical instrument that has a relatively small sliding resistance and can be smoothly protruded, and through which a feeling of touching an organ can be obtained.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0017] A surgical instrument 10 according to an embodiment to which the surgical instrument according to the present invention is applied will be described with reference to the drawings.

[0018] As shown in FIGS. 1, 2(a), 2(b), 2(c), 2(d) and 3, the surgical instrument 10 includes a shaft 11, an outer sheath 12, a probe 13, a grip 14, a trigger 15, a handle 16, a first link wire 17, and a second link wire 18. The surgical instrument 10 of the present embodiment is used for human surgery, but is not limited thereto, and can also be used for, for example, animal surgery.

[0019] The surgical instrument 10 is used for surgical operations including laparoscopic surgery in which small holes are made in several places in the abdomen of the human body to perform surgery inside the abdominal cavity, and open surgery in which the abdomen is opened. The surgical instrument 10 is used to perform ligation by passing a thread or tape behind a luminal organ or blood vessel having a tubular or bag-like form inserted into the abdominal cavity, or to perform a treatment of hooking a luminal organ or blood vessel and lifting it forward to shift the position.

[0020] As shown in FIGS. 3, 4(a), 4(b) and 5, the shaft 11 includes a cylindrical main body 21, a tip guide 22, and an intermediate guide 23. The cylindrical main body 21 is formed with a through hole 21a penetrating in the axial direction and a notch 21b at the tip portion. The notch 21b functions as a clearance when the outer sheath 12 rotates.

[0021] The cylindrical main body 21 has its proximal end portion inserted into and fixed to the grip 14. The cylindrical main body 21 fixes the tip guide 22 inside the tip portion and fixes the intermediate guide 23 inside between the tip guide 22 and the proximal end portion. The first link wire 17 and the second link wire 18 are inserted through the cylindrical main body 21.

[0022] As shown in FIG. 4(b), the tip guide 22 has a first through hole 22a and a second through hole 22b formed in the axial direction, and they are spaced apart from each other. The tip portion of the first link wire 17 is inserted through the first through hole 22a.

[0023] The first through hole 22a of the tip guide 22 prevents the first link wire 17 from being bent and deformed, guides the first link wire 17, and smoothly moves it in the axial direction. The tip portion of the second link wire 18 is inserted through the second through hole 22b. The second through hole 22b of the tip guide 22 prevents the second link wire 18 from being bent and deformed, guides the second link wire 18, and smoothly moves it in the axial direction.

[0024] The intermediate guide 23 is made of a rod-shaped member and is fixed to the shaft 11 so as to be located at the radial center portion of the shaft 11. The first link wire 17 is inserted through the gap between the outer peripheral surface of the intermediate guide 23 and the inner wall surface on one side of the shaft 11. The intermediate guide 23 prevents the first link wire 17 from being bent and deformed and guides its smooth movement in the axial direction.

[0025] The second link wire 18 is inserted through the gap between the outer peripheral surface of the intermediate guide 23 and the inner wall surface on the side opposite to one side of the shaft 11. The intermediate guide 23 prevents the second link wire 18 from being bent and deformed, guides the second link wire 18, and smoothly moves it in the axial direction.

[0026] As shown in FIGS. 4(a) and 4(b), the outer sleeve 12 is in the axial direction toIt is composed of a curved member curved with a predetermined curvature, and a through hole 12a penetrating in the axial direction is formed. A tip wire 18c (described later) of the second link wire 18 is inserted through the through hole 12a so as to be reciprocally movable. Further, a regulating portion 12b is formed at the opening portion of the outer sleeve 12, and the regulating portion 12b regulates the probe 13 so as not to come out of the outer sleeve 12. Further, the regulating portion 12b also has a function of guiding the proximal end portion of the probe 13 to slide smoothly.

[0027] The outer sleeve 12 is rotatably attached to the shaft 11 via a pin at the central portion in the direction orthogonal to the axis of the proximal end portion, and a connecting portion 12c that connects to the tip of the first link wire 17 is provided on the side facing the notch 21b of the cylindrical main body 21 of the shaft 11.

[0028] The outer sleeve 12 rotates about a pin via the connecting portion 12c in response to the horizontal movement in the axial direction of the first link wire 17. By rotating, the outer sleeve 12 can take a state of being straight with respect to the shaft 11 and a state of being inclined with respect to the shaft 11. The predetermined curvature is appropriately selected based on setting specifications such as the size, structure, and material of the surgical instrument 10, and data such as experimental values. The outer sleeve 12 is rotatably supported so that the center of curvature is located upward on the side opposite to the side where the grip 14 protrudes with the central axis of the shaft 11 in between, and in the inclined posture state, the tip portion of the outer sleeve 12 protrudes upward.

[0029] As shown in FIGS. 4(a) and 4(b), the probe 13 is composed of a flat curved member curved with substantially the same curvature as the predetermined curvature of the outer sleeve 12 in the axial direction to and is housed in the outer sleeve 12 so as to be insertable and removable. The probe 13 is connected to the tip portion of the second link wire at the proximal end portion, and enters and exits the outer sleeve 12 according to the movement in the axial direction of the second link wire 18. A through hole 13a for passing a thread or a tape is formed at the tip portion of the probe 13.

[0030] As shown in FIG. 1, the grip 14 is composed of a one - side grip 31, a the - other - side grip 32, and three fastening members 33. The grip 14 has a two - part structure divided into the one - side grip 31 and the the - other - side grip 32. The one - side grip 31 and the the - other - side grip 32 are formed symmetrically about the dividing surface, and are fastened and integrated with each other by three fastening members 33. The grip 14 functions as a handle that can be held with one hand when a medical staff uses the surgical instrument 10.

[0031] As shown in FIG. 5, the one - side grip 31 is composed of a handle part 31a held by a medical staff, an insertion part 31b into which the shaft 11 is inserted, a support part 31c that rotatably supports the handle 16, a support pin part 31d that rotatably supports the trigger 15, a rotation restricting part 31e that restricts the rotation of the trigger 15, and three fastening parts 31f. Each component is integrally formed, for example, by molding a synthetic resin.

[0032] The the - other - side grip 32 has a mirror - symmetric shape about the dividing surface with respect to the one - side grip 31, has the same components as the one - side grip 31, and is formed in the same manner as the one - side grip 31. The one - side grip 31 and the the - other - side grip 32 of the grip 14 can be assembled as follows. That is, after the proximal end portion of the shaft 11 is attached to the insertion part 31b of the one - side grip 31, the handle 16 is attached to the support part 31c, and the trigger 15 is attached to the support pin part 31d, the the - other - side grip 32 is overlapped on the one - side grip 31, and each fastening part 31f is fastened by a fastening member 33, thereby completing the assembly.

[0033] The trigger 15 is integrally composed of an operation part 15b in which an insertion hole 15a into which a finger of a medical staff is inserted is formed, a rotation part 15d in which a through - hole 15c into which the support pin part 31d is inserted is formed, a connection part 15e that connects to the second link wire 18, and a wire fixing part 15f that fixes the proximal end portion of the second link wire 18.

[0034] As shown in FIG. 5, the trigger 15 rotates about the support pin portion 31d by an operation in the direction indicated by the arrow a of the trigger by the finger of a medical worker, and by this rotation, the second link wire 18 reciprocates in the axial direction indicated by the arrow b. The clockwise rotation in which the through hole 15c of the trigger 15 moves away from the insertion portion 31b of the one-side grip 31 is restricted by the rotation restricting portion 31e, and the counterclockwise rotation is restricted by the restricting portion 12b (FIG. 4(b)) of the outer jacket 12. The trigger 15 is rotatably supported by the grip 14 by the support pin portion 31d, and can be stopped at an arbitrary position within the rotatable range.

[0035] As shown in FIG. 5, the handle 16 has a rotary handle 41 and a moving block 42. When the rotary handle 41 rotates forward or backward in the direction of the arrow c, the moving block 42 reciprocates in the direction of the arrow b as it rotates. For example, when viewed from the side of the rotary handle 41, when the rotary handle 41 rotates counterclockwise, the moving block 42 moves in a direction away from the rotary handle 41.

[0036] The rotary handle 41 is composed of a handle portion 41a, an engaging portion 41b, and a threaded portion 41c. The surface portion of the handle portion 41a is subjected to uneven processing such as flat knurling so as to be easy to hold and slip-resistant. The engaging portion 41b restricts the movement of the handle 16 in the direction of the arrow b and is rotatably engaged with the support portion 31c of the grip 14, and a male thread is formed on the threaded portion 41c.

[0037] The moving block 42 is composed of a main body portion 42a, a threaded portion 42b, and a fixing portion 42c. The moving block 42 is accommodated in the support portion 31c of the grip 14, can reciprocate in the direction of the arrow b, and its rotation in the radial direction is restricted. A female thread that is threadedly coupled to the male thread of the threaded portion 41c is formed at the center of the moving block 42 in the axial direction on the threaded portion 42b. Further, the base end portion of the first link wire 17 is fixed to the fixing portion 42c.

[0038] The first link wire 17 is formed of a highly rigid wire material such as a stainless steel wire, for example. The first link wire 17 is housed in the shaft 11, the tip portion thereof is inserted into the first through hole 22a of the tip guide 22, and the movement thereof is guided by the tip guide 22. The proximal end portion of the first link wire 17 is fixed to the fixing portion 42c of the movement block 42 of the handle 16, and the tip portion thereof is connected to the connecting portion 12c of the outer sheath 12. Therefore, the first link wire 17 has a function of transmitting the operation of the handle 16 to the outer sheath 12.

[0039] As shown in FIGS. 4(b) and 5, the second link wire 18 is composed of a main body wire 18a, a flexible wire 18b, and a tip wire 18c. Each component is coupled to each other to form a single wire. The main body wire 18a and the tip wire 18c are formed of a highly rigid wire material such as a stainless steel wire, similar to the first link wire 17. The flexible wire 18b is formed of a wire material having rigidity and being bendable.

[0040] The second link wire 18 is housed in the shaft 11, the tip portion of the main body wire 18a and the proximal end portion of the flexible wire 18b are inserted into the second through hole 22b of the tip guide 22, and the movement thereof is guided by the tip guide 22.

[0041] As shown in FIG. 5, the proximal end portion of the main body wire 18a is fixed to the wire fixing portion 15f of the trigger 15, and the tip portion of the tip wire 18c is connected to the proximal end portion of the probe 1�. Therefore, the second link wire 18 has a function of transmitting the operation of the trigger 15 to the probe 13.

[0042] Hereinafter, the operation of the surgical instrument 10 according to the embodiment will be described with reference to the drawings. After use, as shown in FIG. 6(a), the outer sheath 12 is held by the shaft 11 in a straight posture that is substantially horizontal in the axial direction of the shaft 11 and does not protrude from the outer peripheral surface of the shaft 11. The probe 13 is housed in the outer sheath 12.

[0043] The surgical instrument 10 is inserted into the abdominal cavity by a medical practitioner through a tube, so-called trocar, which is inserted into the body during surgery with the outer sheath 12 shown in Fig. 6(a) in a straight state.

[0044] Then, as shown in Fig. 6(b), when the rotation handle 41 rotates counterclockwise as indicated by the arrow d by the operation of the medical practitioner, the moving block 42 moves in the direction indicated by the arrow e. When the moving block 42 moves, the outer sheath 12 rotates in the direction of the arrow f about a pin (not shown) by the first link wire 17. Due to the rotation of the outer sheath 12, the outer sheath 12 and the probe 13 project in the direction of the arrow f from the axis of the shaft 11 and assume a posture inclined with respect to the shaft 11.

[0045] Then, as shown in Fig. 6(c), when the trigger 15 is pulled in the direction of the arrow g by the medical practitioner according to the surgical content, the trigger 15 rotates about the support pin portion 31d, and the second link wire 18 is pressed by the wire fixing portion 15f of the trigger 15 and moves in a direction away from the grip 14.

[0046] Due to the movement of the second link wire 18, the probe 13 smoothly projects in the direction of the arrow h from the outer sheath 12 with a relatively small sliding resistance according to the amount of rotation of the trigger 15. That is, when the rotation angle of the trigger 15 is small, the protruding amount of the probe 13 from the outer sheath 12 is also small, and when the rotation angle of the trigger 15 is large, the protruding amount of the probe 13 from the outer sheath 12 also becomes large.

[0047] By operating the trigger 15 of the medical worker, the probe 13 can pass through tissue spaces that are difficult to reach with ordinary surgical instruments behind organs with blocked interiors, so-called solid organs, organs with complex shapes, blood vessels, and organs with hollow interiors, so-called luminal organs. In particular, in laparoscopic surgery, an operating trocar, that is, an endoscopic surgery trocar sleeve, constructs a working channel connecting the inside and outside of the body, and enables surgery without being restricted by the site where the surgical operation is performed. The medical worker can use the probe 13 to perform surgery in the visible part by the endoscope, that is, in the so-called surgical field, and can perform a ligation treatment by passing a thread or tape through the through-hole 13a of the probe 13. Also, the probe 13 can hook and lift an organ, making the surgical operation easier.

[0048] During such surgery, since the sliding resistance between the probe 13 and the outer sheath 12 is small, the medical worker can feel the resistance of the reaction force from the organ when the probe 13 touches the organ by operating the trigger 15. In addition, in order for the medical worker to move the probe 13 in the direction of housing it in the outer sheath 12, it can be executed by pushing the trigger 15 in the direction opposite to the arrow g shown in FIG. 6(c).

[0049] After using the surgical instrument 10, push the trigger 15 in the direction opposite to the arrow g shown in FIG. 6(c) to house the probe 13 in the outer sheath 12, rotate the rotary handle 41 counterclockwise in the direction opposite to the arrow d shown in FIG. 6(b), and move the moving block 42 in the direction opposite to the arrow e. By this movement, the outer sheath 12 rotates in the direction opposite to the arrow f, and the surgical instrument 10 can be made into the state where the outer sheath 12 is straight as shown in FIG. 6(a) after use. Therefore, for example, it can be easily taken out from the operating trocar.

[0050] Hereinafter, the effects of the surgical instrument 10 according to the embodiment will be described. The surgical instrument 10 according to the embodiment includes a shaft 11, a curved outer sleeve 12 formed with a predetermined curvature, a curved probe 13 that is removably accommodated within the outer sleeve 12 and is formed with substantially the same curvature as the predetermined curvature, and a trigger 15 for inserting and removing the probe 13.

[0051] With this configuration, in the surgical instrument 10, the probe 13 is accommodated in the outer sleeve 12 provided on the shaft 11, and the probe 13 accommodated in the outer sleeve 12 protrudes from the outer sleeve 12 by operating the trigger 15, and the protruding probe 13 is accommodated within the outer sleeve 12 by operating the trigger 15. Since the probe 13 is formed with substantially the same curvature as the outer sleeve 12 formed with a predetermined curvature, when the probe 13 protrudes from the outer sleeve 12, the sliding resistance between the probe 13 and the outer sleeve 12 is reduced, and an effect is obtained in that it can protrude smoothly. The probe 13 can be inserted into and removed from the outer sleeve 12 without deforming under tissue pressure.

[0052] As a result, an effect is obtained in that a medical worker using the surgical instrument 10 can obtain a feeling of touching an organ through the probe 13. In addition, it becomes possible to convey the resistance of the tissue and the size of the gap to the hand of the operating medical worker as a tactile sensation, and an effect is obtained in that the probe 13 can be safely advanced without causing organ damage while checking the state of the tip of the probe 13. Further, by inserting and removing the probe 13 from the outer sleeve 12, an effect is obtained in that a medical worker can perform operations from highly flexible angle adjustment to depth adjustment without being restricted by the site where the surgical operation is performed.

[0053] In addition, in the surgical instrument 10, the outer sleeve 12 is rotatably provided on the shaft 11, a handle 16 is provided at the proximal end portion of the shaft 11, and the outer sleeve 12 is configured to rotate by the handle 16. With this configuration, the surgical instrument 10 can take a state in which the outer sleeve 12 is in a straight posture with respect to the shaft 11 and a state in which the outer sleeve 12 is inclined with respect to the shaft 11 by operating the handle 16.

[0054] In addition, the surgical instrument 10 includes a first link wire 17 that is housed within the shaft 11 and connects the outer sleeve 12 and the handle 16, and a second link wire 18 that is housed within the shaft 11 and connects the probe 13 and the trigger 15.

[0055] With this configuration, in the surgical instrument 10, the movement of the handle 16 due to the operation of the handle 16 is transmitted to the outer sleeve 12 via the first link wire 17 housed within the shaft 11, and the movement of the trigger 15 due to the operation of the trigger 15 is transmitted to the probe 13 via the second link wire 18 housed within the shaft 11. A medical practitioner using the surgical instrument 10 can obtain the effect of being able to obtain, via the second link wire 18, the sensation of the probe 13 touching an organ through the probe 13.

[0056] In addition, the surgical instrument 10 can be deformed into the states shown in FIGS. 6(a) to 6(c) and the tip portion can be made U-shaped by, for example, tilting the outer sleeve 12 with respect to the shaft 11 by operating the handle 16, and further protruding the probe 13 by rotating the trigger 15. Therefore, for example, a medical practitioner can hook and pull up a luminal organ having a tubular or bag-like form, a blood vessel, a bile duct, or the digestive tract around a parenchymal organ by the probe 13 inserted into the abdominal cavity, and shift its position, thereby obtaining the effect.

[0057] In addition, the surgical instrument 10 has a through hole 13a formed at the tip portion of the probe 13 for passing a thread therethrough. With this configuration, a medical practitioner can peel behind a luminal organ having a tubular or bag-like form, a blood vessel, a bile duct, or the digestive tract around a parenchymal organ by the probe 13 inserted into the abdominal cavity, and perform an operation of passing a thread or a tape therethrough, thereby obtaining the effect of being able to perform a ligation treatment with the thread or the tape.

[0058] Further, the surgical instrument 10 can project the distal end portion of the outer sheath 12 upward in a direction opposite to the grip 14 by operating the handle 16, and can project the distal end portion of the probe 13 further upward from the outer sheath 12 by operating the trigger 15. Therefore, for example, in the abdominal cavity, the distal end portion of the probe 13 can be easily confirmed by the image of the endoscope, and the operation of passing a thread or a tape behind a luminal organ, a blood vessel around a parenchymal organ, a bile duct or the digestive tract can be easily performed.

[0059] As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the gist of the present invention described in the claims.

Explanation of Reference Numerals

[0060] 10... Surgical instrument, 11... Shaft, 12... Outer sheath, 12a, 13a, 15c, 21a... Through hole, 12b... Regulation portion, 12c... Connection portion, 13... Probe, 14... Grip, 15... Trigger, 15a... Insertion hole, 15b... Operation portion, 15d... Rotation portion, 15e... Connection portion, 15f... Wire fixing portion, 16... Handle, 17... First link wire, 18... Second link wire, 18a... Main body wire, 18b... Flexible wire, 18c... Tip wire, 21... Cylindrical main body, 21b... Notch, 22... Tip guide, 22a... First through hole, 22b... Second through hole, 23... Intermediate guide, 31... One-side grip, 31a... Handle portion, 31b... Insertion portion, 31c... Support portion, 31d... Support pin portion, 31e... Rotation regulation portion, 31f... Fastening portion, 32... The other-side grip, 33... Fastening member, 41... Rotation handle, 41a... Handle portion, 41b... Engagement portion, 41c, 42b... Thread portion, 42... Moving block, 42a... Main body portion, 42c... Fixing portion

Claims

1. A surgical instrument used for performing a ligation procedure by passing a thread or tape behind a luminal organ or blood vessel inserted into the abdominal cavity, or for performing a procedure of hooking the luminal organ or blood vessel and lifting it forward to shift its position, comprising: a shaft having a through-hole formed therethrough in the axial direction; a curved outer sleeve provided at the distal end portion of the shaft and curved with a predetermined curvature in the axial direction; a curved probe accommodated in the outer sleeve so as to be insertable and removable, and curved with the same curvature as the curvature in the axial direction; a trigger provided at the proximal end portion of the shaft for inserting and removing the probe; and comprising; the outer sleeve is rotatably provided on the shaft; a handle provided at the proximal end portion of the shaft for rotating the outer sleeve; A surgical instrument characterized by comprising.

2. a first link wire accommodated in the shaft for connecting the outer sleeve and the handle; a second link wire accommodated in the shaft for connecting the probe and the trigger, The surgical instrument according to claim 1, characterized by comprising.

3. The surgical instrument according to claim 1 or 2, characterized in that a through-hole for passing a thread is formed at the distal end portion of the probe.

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