CN119014916A - Surgical Retriever - Google Patents

Abstract

The invention discloses a surgical object retriever. The surgical object retriever comprises a bag body and a surgical instrument, wherein the surgical instrument comprises a handle assembly, an operating mechanism, an end effector and a connecting mechanism; the handle assembly comprises a movable handle; the connecting mechanism comprises: a locking member, which is arranged on the operating mechanism and has an unlocking position and a locking position; an actuating mechanism, which is arranged on the operating mechanism and connected to the locking member; a first locking arm; and a second locking arm, wherein the first locking arm and/or the second locking arm are arranged on one of the end effector and the operating mechanism and can be disengaged from the other, the locking member is in the unlocking position, the first locking arm is disengaged from the other, the locking member is in the locking position, the locking member constrains the first locking arm to be engaged with the other, and at this time, in response to the closing of the movable handle, the second locking arm is engaged with the other, thereby locking the end effector with the operating mechanism, thereby solving the problem in the prior art that the tissue fluid contaminated on the end effector of the surgical instrument easily contaminates normal human tissue.

Description

Surgical object taking device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a surgical object extractor.

Background

Surgical extractors are a type of surgical instrument used to remove surgical resections from the abdominal cavity. The surgical extractor comprises a bag body for containing the resected objects, wherein the bag body comprises a main bag opening and an auxiliary bag opening which are respectively used for inserting different surgical instruments. Surgical instruments are often used to hold the resections in the pocket to facilitate handling of the resections when using the surgical retriever. The surgical instrument includes an operating mechanism and an end effector that is caused to perform a grasping action or a releasing action to grasp or release the resection by manipulating the operating mechanism.

In the prior art, when the surgical extractor is used, a bag body is placed in an abdominal cavity to hold a resected object, such as a tumor, surgical instruments are inserted into the bag body from an auxiliary bag opening of the bag body to clamp the resected object, other surgical instruments are inserted into the bag body from a main bag opening or other auxiliary bag openings of the bag body, and the resected object is crushed by adopting a rotary cutter and taken out to the outside.

After the resections are removed to the outside of the body, the surgical instrument is removed from the auxiliary pocket where it is located, and other surgical instruments are removed from the main pocket or the auxiliary pocket where it is located.

During the process of clamping the resected object by the end effector of the surgical instrument, the end effector can be stained with tissue fluid of the resected object, and when the surgical instrument is taken out, the tissue fluid stained by the end effector can also pollute the auxiliary pocket where the end effector is positioned, so that the tissue fluid on the end effector or the auxiliary pocket can pollute the inside of the abdominal cavity, and the risk of tumor tissue diffusion is brought.

To avoid the above problems, a split surgical instrument may be used, in which the end effector of the surgical instrument is sealingly connected to the auxiliary port, the operating mechanism is located outside the bag, the operating mechanism is detachably connected to the end effector, and after the resected object is processed, the operating mechanism is detached from the end effector, and then the operating mechanism is removed from the abdominal cavity, and the end effector is not required to be removed, but is withdrawn out of the body together with the bag.

Based on the foregoing, there is a need for a split surgical instrument that is easy to disassemble and assemble.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a surgical extractor which solves the problem that an end effector and an operating mechanism of a split surgical instrument in the prior art are inconvenient to assemble and disassemble.

The invention is realized by the following technical scheme: a surgical extractor comprising a pocket and a surgical instrument, the surgical instrument comprising a handle assembly, an operating mechanism, an end effector, and a connecting mechanism; the handle assembly includes a movable handle; the end effector is connected with the bag body in a sealing way and is at least partially arranged in the bag body, the operating mechanism is positioned on the outer side of the bag body and is detachably connected with the end effector through the connecting mechanism, and the connecting mechanism comprises: the locking piece is arranged on the operating mechanism and provided with an unlocking position and a locking position; the actuating mechanism is arranged on the operating mechanism and connected with the locking piece, and the actuating mechanism drives the locking piece to switch between an unlocking position and a locking position; a first locking arm; a second locking arm disposed on one of the end effector and the operating mechanism and detachably engaged with the other, the second locking arm being disposed on one of the end effector and the operating mechanism and detachably engaged with the other; the locking member is in an unlocked position, the first locking arm is separated from the other of the end effector and the operating mechanism; the locking member is in a locked position, the locking member restrains the first locking arm to engage the first locking arm with the other of the end effector and the operating mechanism, when the second locking arm engages the other of the end effector and the operating mechanism in response to the movable handle being closed, thereby locking the end effector with the operating mechanism.

Further, the operating mechanism comprises a rod body assembly, the end effector comprises a clamping mechanism and a sleeve connected with the clamping mechanism, the rod body assembly comprises an operating rod and a sleeve sleeved on the operating rod, the sleeve is detachably connected with the sleeve, and the clamping mechanism is detachably connected with the operating rod.

Further, a first locking arm is provided on one of the sleeve and the collar and is detachably engaged with the other, and a second locking arm is provided on one of the clamping mechanism and the lever and is detachably engaged with the other.

Further, a handle assembly is disposed proximal to the shaft assembly, and a movable handle is drivingly connected to the lever for axial movement of the lever along the shaft assembly in response to rotation of the movable handle.

Further, the movable handle abuts the proximal end of the lever, and the lever moves linearly in response to rotation of the movable handle.

Further, a locking member is disposed between the lever and the sleeve, the locking member being in a locked position, an outer wall of the locking member abutting the first locking arm to restrain the first locking arm such that one of the sleeve and the sleeve engages the other.

Further, a first locking arm is disposed on the sleeve and detachably engaged with the inner wall of the sleeve, and a second locking arm is disposed on the clamping mechanism and detachably engaged with the outer wall of the lever; the locking member is in the unlocked position with the first locking arm disengaged from the inner wall of the sleeve, the locking member is in the locked position with the locking member restraining the first locking arm to engage the first locking arm with the inner wall of the sleeve, at which time the lever moves distally to engage the second locking arm with the outer wall of the lever in response to the movable handle being closed, thereby locking the end effector with the operating mechanism.

Further, at least two first locking arms are arranged at intervals along the circumferential direction of the sleeve; and/or the number of the second locking arms is at least two, the at least two second locking arms are arranged at intervals along the circumferential direction of the clamping mechanism and form a containing space, and the distal end of the operating rod extends into the containing space to be jointed with the second locking arms.

Further, the clamping mechanism comprises a clamping jaw assembly and a moving piece, and the moving piece is in driving connection with the clamping jaw assembly; the second locking arm is arranged on the moving piece; after the operating rod is engaged with the second locking arm, the operating rod moves along the axial direction to drive the moving piece to move along the axial direction so as to open or close the clamping jaw assembly.

Further, the clamping jaw assembly comprises a torsion spring, a first clamping jaw and a second clamping jaw which are connected in a pivoting mode, the first clamping jaw is connected with the sleeve, the second clamping jaw is connected with the moving piece in a driving mode, a first torsion arm of the torsion spring is connected with the first clamping jaw, and a second torsion arm of the torsion spring is connected with the second clamping jaw, so that the first clamping jaw and the second clamping jaw can be kept closed when the first clamping jaw and the second clamping jaw are not subjected to external force.

Further, the distal end of the sleeve is provided with a guide block, the inner wall of the proximal end of the sleeve is provided with a guide groove matched with the guide block, and the guide block stretches into the guide groove to guide the connection of the sleeve and the sleeve.

Compared with the prior art, the invention has the beneficial effects that: through setting up the end effector inside the bag body, operating device sets up the outside of the bag body and is connected with end effector detachably through coupling mechanism, thereby when taking out surgical instrument after the operation is accomplished, end effector can follow the bag body and take out outside, make the tissue fluid that is stained with on the end effector can not pollute the abdominal cavity inside, avoid the risk of pollution diffusion, in addition, through the first locking arm with coupling mechanism and the locking of second locking arm in proper order of two steps, finally realize the locking of end effector and operating device, under the condition that first locking arm and second locking arm have been avoided locking simultaneously, the doctor that brings needs to aim at first locking arm and the inconvenient problem of second locking arm operation simultaneously, make the equipment of end effector and operating device more convenient high-efficient, save operation time.

Drawings

FIG. 1 is a schematic view of a surgical extractor according to an embodiment of the present invention;

FIG. 2 is a schematic view of a pushing assembly in a deployed state provided by an embodiment of the present invention;

fig. 3 is a schematic structural view of a pushing assembly in a storage state according to an embodiment of the present invention;

FIG. 4 is a schematic view of a surgical instrument according to an embodiment of the present invention;

FIG. 5 is an exploded view of a surgical instrument provided in accordance with an embodiment of the present invention;

FIG. 6 is a schematic view of an end effector with a lock in a locked position according to an embodiment of the present invention;

FIG. 7 is a schematic view of the end effector with the jaw assembly provided in an open state in accordance with an embodiment of the present invention;

FIG. 8 is a schematic view of the end effector with the jaw assembly in a closed position, according to an embodiment of the present invention;

FIG. 9 is a structural cross-sectional view of an end effector with a jaw assembly according to an embodiment of the present invention in an open state;

FIG. 10 is a schematic view of a first locking arm according to an embodiment of the present invention;

FIG. 11 is a schematic view of a first trench according to an embodiment of the present invention;

FIG. 12 is a schematic view of a second locking arm according to an embodiment of the present invention;

FIG. 13 is a schematic view of a second trench according to an embodiment of the present invention;

FIG. 14 is a schematic view of the structure at the proximal end of a sleeve provided in accordance with an embodiment of the present invention;

FIG. 15 is a schematic view of the structure at the distal end of a cannula provided in accordance with an embodiment of the present invention;

FIG. 16 is a schematic view of an angle of a jaw assembly according to an embodiment of the present invention;

fig. 17 is a schematic view of another angle of the jaw assembly according to an embodiment of the present invention.

Wherein the above figures include the following reference numerals:

1. An end effector; 100. a clamping mechanism; 101. a first jaw; 102. a second jaw; 1021. a sliding shaft; 103. a moving member; 1031. a chute; 104. a torsion spring; 1041. a first torsion arm; 1042. the second torsion arm; 110. a sleeve; 111. a first trench; 112. a guide groove; 2. a shaft assembly; 200. an operation lever; 201. a first abutment block; 202. a second trench; 210. a sleeve; 211. a guide block; 3. a movable handle; 4. a fixed handle; 5. a transmission member; 6. a first locking arm; 61. a first clamping part; 7. a second locking arm; 71. a second clamping part; 8. a locking member; 81. a pushing part; 9. an actuator; 10. a connecting pipe; 11. an accommodating cylinder; 12. an elastic arm; 13. a bag body; 131. a pocket mouth; 14. a push rod; 15. an actuation handle; 16. a mounting part; 161. a second abutment block; 17. a first reset member; 18. and a second reset piece.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is to be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a handle of a surgical instrument. The term "proximal" refers to the portion that is proximal to the clinician, and the term "distal" refers to the portion that is distal to the clinician. I.e., the handle is proximal and the end effector is distal, e.g., the proximal side of a component represents a side relatively closer to the handle and the distal side represents a side relatively closer to the end effector. However, surgical extractors can be used in many orientations and positions, and thus these terms expressing relative positional relationships are not limiting and absolute.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, movably connected, or integrated, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two elements or interaction relationship between the two elements such as abutting. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. It should be noted that, when the terms "connected" and "connected" are used in the meanings defined by the corresponding terms, only the cases where the terms are clearly required are excluded, and other possible cases are not excluded, such as "detachably connected" means detachably connected, not including being integrated, but movable connection and the like are not excluded.

The term "separated" as used herein includes the two elements being in a separable state and does not merely refer to the two elements being physically separated from each other.

The term "engaged" as used herein means that two elements are connected together and locked. Engagement and disengagement are two states corresponding between two elements. The term "detachably engaged with another" means that the two elements are locked in an engaged state, but the engaged state may be released such that the two elements are in a disengaged state.

The term "axial" as used herein refers to the length of the sleeve 210. The "longitudinal axis" of the lever 200 is the axis of the lever 200 along its length.

Referring to fig. 1, the present embodiment provides a surgical extractor, which includes a pushing assembly, a receiving cylinder 11, a bag 13, and a surgical instrument.

Referring to fig. 1-3, the push assembly includes a push rod 14 and an actuation handle 15. The push lever 14 is movably provided in the accommodating cylinder 11. The push rod 14 has axially opposite first and second ends. Two elastic arms 12 are connected to a first end of the push rod 14. The second end of the push rod 14 is connected to an actuating handle 15, and the actuating handle 15 is disposed outside the housing cylinder 11.

The pocket 13 is used to house an intraoperative resection object, such as a tumor. Referring to fig. 1, the pouch 13 has a pocket 131 to facilitate placement of the resections within the pouch 13 and to facilitate insertion of other surgical instruments into the pouch 13 for treatment of the resections. The mouth 131 of the bag 13 is detachably connected to the two elastic arms 12. Specifically, the pocket 131 has a circumferentially arranged channel, which is annular, which is wound around the pocket 131 for one week with one point of the pocket 131 as a start point, and returns to the start point, and two channel openings are formed. One elastic arm 12 is inserted into the channel from one of the channel openings, and the other elastic arm 12 is inserted into the channel from the other channel opening, thereby expanding the pocket 131 so that the bag body 13 is in the unfolded state. In the initial state, the two elastic arms 12 can be compressed by the inner wall of the accommodating cylinder 11 and accommodated in the accommodating cylinder 11, and the bag 13 is accommodated in the accommodating cylinder 11, so that the bag 13 is in the accommodated state.

Referring to fig. 1 and 4, a surgical instrument includes a handle assembly, an operating mechanism, an end effector 1, and a connecting mechanism. The end effector 1 is sealingly connected to the pocket 13 to avoid leakage of tissue fluid from the resections in the pocket 13. The end effector 1 is at least partially disposed within the interior of the pocket 13 to grip the resections within the pocket 13 to facilitate handling of the resections by other surgical instruments. The operating mechanism is located outside the pocket 13, the handle assembly is drivingly connected to the operating mechanism, the operating mechanism is detachably connected to the end effector 1, and the operating mechanism can be actuated by manipulating the handle assembly to cause the end effector 1to perform a grasping action or a releasing action.

Referring to fig. 4 to 8, in the present embodiment, the handle assembly includes a movable handle 3 and a fixed handle 4, the movable handle 3 is pivotally connected to the fixed handle 4, and the end effector 1 can be caused to perform a gripping action or a releasing action by manipulating the movable handle 3. When the surgical extractor is used, the accommodating cylinder 11 is placed in the abdominal cavity, the actuating handle 15 is pushed, the pushing rod 14 is driven to move, the two elastic supporting arms 12 extend out of the accommodating cylinder 11 and are gradually opened, the bag body 13 is unfolded in the abdominal cavity, the actuating handle 15 is pulled back, the pushing rod 14 moves along a third direction, the two elastic supporting arms 12 are accommodated in the accommodating cylinder 11, the two elastic supporting arms 12 are separated from the bag body 13, the accommodating cylinder 11 is taken out from the abdominal cavity, and therefore the bag body 13 is placed in the abdominal cavity.

After the bag body 13 is placed in the abdominal cavity, the operating mechanism and the end effector 1 are assembled, and after the assembly is completed, the end effector 1 can be driven by the operating handle assembly to perform a grabbing action or a releasing action so as to clamp or release the cut objects in the bag body 13. When the resections are processed, the operating mechanism is detached from the end effector 1, then the operating mechanism is taken out from the abdominal cavity, and the end effector 1 is arranged in the bag body 13 without being pulled out, but is pulled out of the body along with the bag body 13.

When the surgical extractor is used for extracting surgical instruments, the end effector 1 is arranged in the bag body 13 and is pulled out of the body along with the bag body 13, so that tissue fluid stained by the end effector 1 can not pollute other tissues in the abdominal cavity, and the risk of pollution diffusion is avoided.

The efficiency and ease of assembly and disassembly are particularly important when assembling and disassembling the end effector 1 and the operating mechanism. In order to facilitate assembly and disassembly of the end effector 1 and the operating mechanism, the present embodiment provides a coupling mechanism for detachably coupling the operating mechanism to the end effector 1. Specifically, the present embodiment of the connecting mechanism includes a lock 8, an actuating mechanism, a first lock arm 6, and a second lock arm 7. The locking member 8 is provided to the operating mechanism, and the locking member 8 has an unlocked position and a locked position. The actuating mechanism is arranged on the operating mechanism and connected with the locking piece 8, and can be moved by the actuating mechanism to drive the locking piece 8 to move, so that the locking piece 8 is switched between the unlocking position and the locking position.

The first lock arm 6 and the second lock arm 7 are provided to one of the end effector 1 and the operating mechanism and are detachably engaged with the other. That is, the first locking arm 6 may be provided to the end effector 1 or to the operating mechanism, as may the second locking arm 7, and in practice, the specific position of the locking arm may be designed according to the use requirement, the processing requirement, and the like. The first and second locking arms 6, 7 are sized to engage the operating mechanism when the first and second locking arms 6, 7 are disposed on the end effector 1, and the first and second locking arms 6, 7 are sized to engage the end effector 1 when the first and second locking arms 6, 7 are disposed on the operating mechanism.

When the locking member 8 is in the unlocked position, the first locking arm 6 is disengaged from the other of the end effector 1 and the operating mechanism described above. If the first locking arm 6 is provided to the end effector 1 and is detachably engaged with the operating mechanism, the first locking arm 6 is separated from the operating mechanism, i.e., in a detachable state, when the lock 8 is in the unlock position. If the first locking arm 6 is provided to the operating mechanism and is detachably engaged with the end effector 1, the first locking arm 6 is separated from the end effector 1, i.e., in a detachable state, when the lock 8 is in the unlocked position.

When the locking member 8 is in the locking position, the locking member 8 restrains the first locking arm 6 such that the first locking arm 6 engages the other of the end effector 1 and the operating mechanism, and then the second locking arm 7 engages the other of the end effector 1 and the operating mechanism under the drive of the movable handle such that the end effector 1 is locked with the operating mechanism. In an alternative embodiment, the first locking arm 6 and the second locking arm 7 are provided to the end effector 1 and are detachably engaged with the operating mechanism, and when the locking member 8 is in the locked position, the locking member 8 restrains the first locking arm 6 so that the first locking arm 6 is engaged with the operating mechanism, and then the second locking arm 7 is engaged with the operating mechanism under the drive of the movable handle. In another alternative embodiment, the first locking arm 6 is provided to the operating mechanism and the second locking arm 7 is provided to the end effector 1, such that when the locking member 8 is in the locked position, the locking member 8 restrains the first locking arm 6 such that the first locking arm 6 engages the end effector 1, and then the second locking arm 7 engages the operating mechanism under actuation of the movable handle, thereby locking the end effector 1 to the operating mechanism. Whether the first locking arm 6, the second locking arm 7 are provided to the end effector or the operating mechanism depends on the actual needs of the user, and is not explicitly limited herein.

Referring to fig. 4 to 8, in the present embodiment, the operating mechanism includes a shaft assembly 2, a handle assembly is provided at a proximal end of the shaft assembly 2, and the handle assembly is drivingly connected to the shaft assembly 2. The end effector 1 is disposed at a distal end of the shaft assembly 2, and the end effector 1 is detachably connected to the shaft assembly 2.

Referring to fig. 4-7, the end effector 1 includes a clamping mechanism 100 and a sleeve 110 coupled to the clamping mechanism 100. The clamping mechanism 100 is disposed inside the bag 13, so as to clamp the cut-out in the bag 13, and the sleeve 110 is in sealing connection with the bag 13, optionally, the sealing connection is in an adhesive manner, so that the clamping mechanism 100 is isolated from the outside of the bag 13.

Referring to fig. 4 to 7, the shaft assembly 2 includes an operation lever 200 and a sleeve 210 sleeved on the operation lever 200. The sleeve 210 is detachably connected to the sleeve 110, while the operating rod 200 is inserted into the sleeve 110 to be detachably connected to the clamping mechanism 100. The movable handle 3 is drivingly connected to the lever 200, and the lever 200 moves axially along the shaft assembly in response to rotation of the movable handle 3, and in particular, the movable handle 3 is connected to the proximal end of the lever 200, and the lever 200 moves axially relative to the sleeve 210 in response to application of a force to the movable handle 3. Specifically, the movable handle abuts the proximal end of the lever, and the lever moves linearly in response to rotation of the movable handle. In a specific embodiment, as shown in fig. 6, the movable handle 3 abuts the proximal side of the lever 200, and for ease of abutment, the proximal end of the lever 200 may be provided with an extension protrusion or recess, the movable handle 3 abutting the extension protrusion, or a portion of the movable handle 3 being received in the recess abutting the recess sidewall, such that in response to rotation of the movable handle 3, the lever 200 is urged to effect axial movement relative to the sleeve 210.

Referring to fig. 5 to 7, the locking member 8 is disposed between the lever 200 and the sleeve 210. Specifically, the locking member 8 is sleeved on the outer side of the operating rod 200, and the sleeve 210 is sleeved on the outer side of the locking member 8. The second locking arm 7 is in this embodiment arranged distally of the first locking arm 6 in the longitudinal direction of the shaft assembly. The actuating mechanism is configured to drive the locking member 8 between a locked position and an unlocked position, preferably the actuating mechanism is configured to drive the locking member 8 axially proximally from a locked position to an unlocked position, and in other alternative embodiments the actuating mechanism is also configured to drive the locking member 8 axially distally from the unlocked position to the locked position. When the locking member 8 is in the locking position, the outer wall of the locking member 8 abuts the first locking arm 6 to restrain the first locking arm 6.

The first locking arm 6 is provided to one of the sleeve 110 and the socket 210 and is detachably engaged with the other, and the second locking arm 7 is provided to one of the clamping mechanism 100 and the operating lever 200 and is detachably engaged with the other. In this embodiment, the first locking arm 6 is provided to the sleeve 210 and detachably engaged with the inner wall of the sleeve 110, and the second locking arm 7 is provided to the clamping mechanism 100 and detachably engaged with the outer wall of the lever 200. When the locking member 8 is in the unlocked position, the first locking arm 6 is separable from the inner wall of the sleeve 110. When the locking member 8 is in the locking position, the locking member 8 restrains the first locking arm 6 to engage and hold the first locking arm 6 with the inner wall of the sleeve 110, thereby locking the sleeve 110 with the sleeve 210; with the locking member 8 in the locked position, the second locking arm 7 engages the outer wall of the lever 200 upon actuation of the handle assembly, and in particular, in response to the movable handle 3 being closed, the lever 200 moves distally, thereby locking the clamping mechanism 100 with the lever 200, ultimately effecting locking of the end effector 1 with the operating mechanism.

The following will describe the locking process of the end effector 1 and the operating mechanism of the surgical instrument according to the present embodiment:

The end effector 1 may be additionally secured with a conventional clamp and the actuating mechanism may then be operated such that the locking member 8 is moved to the unlocked position and the sleeve 210 is inserted into the sleeve 110, whereupon the actuating mechanism is released and the locking member 8 moves to the locked position, wherein the first locking arm 6 engages the inner wall of the sleeve 110 and the locking member 8 cooperates with the first locking arm 6 to lock the sleeve 210 to the sleeve 110. The distal end of the lever 200 is not engaged with the second locking arm 7 at this time. After the sleeve 210 is locked with the sleeve 110, the movable handle 3 is pressed at this time, so that the lever 200 is moved distally, and thus the lever 200 is moved distally, so that the second lock arm 7 is engaged with and held by the lever 200. Thereby, the shaft assembly 2 of the surgical instrument is assembled with the end effector 1. The manner in which the first locking arm 6 is engaged with the sleeve 110 and the manner in which the second locking arm 7 is engaged with the lever 200 will be described in detail later. According to the embodiment, the first locking arm 6 and the second locking arm 7 are sequentially locked in two steps, so that the end effector 1 and an operating mechanism are assembled and locked finally, namely, the locking piece 8 is operated by the actuating mechanism to lock the first locking arm 6 and the sleeve 110, the operating lever 200 is operated by the movable handle 3 on the basis, the second locking arm 7 and the operating lever 200 are locked, and the problem that a doctor needs to align the first locking arm 6 and the second locking arm 7 simultaneously under the condition that the first locking arm 6 and the second locking arm 7 need to be locked simultaneously is solved, so that the end effector 1 and the operating mechanism are assembled more conveniently and efficiently, and the operation time is saved.

Referring to fig. 9 to 11, in the present embodiment, the distal end of the first locking arm 6 has the first engaging portion 61, and the inner wall of the sleeve 110 has the first groove 111 extending in the circumferential direction and adapted to the outer shape of the first engaging portion 61, that is, the outer shape of the first groove 111 is sized to be able to receive the first engaging portion 61. When the sleeve 210 is inserted into the end effector 1 and connected to the sleeve 110, each of the first engaging portions 61 can be engaged in the first groove 111. When the locking member 8 is in the locking position, each first clamping portion 61 is buckled in the first groove 111, so that the locking of the sleeve 210 and the sleeve 110 is more stable.

Specifically, the first engaging portion 61 has a first abutting surface protruding toward the sleeve 110, and the first groove 111 has a recessed second abutting surface, and when the first locking arm 6 is engaged with the sleeve 110, the first abutting surface abuts against the second abutting surface. At least one of the first abutment surface and the second abutment surface is surface treated to make the surface rough, so that the friction between the first abutment surface and the second abutment surface is increased, and thus the locking of the sleeve 210 and the sleeve 110 is more stable.

Referring to fig. 5, 9 and 12 to 13, in the present embodiment, the proximal end of the second locking arm 7 has the second clamping portion 71, and the outer wall of the distal end of the operating lever 200 has the second groove 202 extending in the circumferential direction and adapted to the outer shape of the second clamping portion 71, i.e., the second groove 202 is sized to be able to receive the second clamping portion 71. Each of the second snap-in portions 71 is snap-fit into the second groove 202 when the lever 200 is inserted into the end effector 1 to engage the second locking arm 7. When the locking member 8 is located at the locking position, under the driving of the operating mechanism, each second clamping portion 71 is buckled into the second groove 202, so that the locking between the operating rod 200 and the clamping mechanism 100 is more stable.

Specifically, the second engagement portion 71 has a third contact surface protruding toward the lever 200, and the outer wall of the lever 200 has a recessed fourth contact surface, and when the second lock arm 7 is engaged with the outer wall of the lever 200, the third contact surface is in contact with the fourth contact surface. At least one of the third abutment surface and the fourth abutment surface is surface-treated so that the surface thereof is rough, thereby increasing friction between the third abutment surface and the fourth abutment surface, and further stabilizing the locking of the lever 200 and the clamping mechanism 100.

In this embodiment, the connection mechanism comprises at least two first locking arms 6 and at least two second locking arms 7. Preferably, the number of second locking arms 7 is four. The two first locking arms 6 are arranged at intervals along the circumference of the sleeve 210. Four second locking arms 7 are arranged at intervals along the circumferential direction of the clamping mechanism 100 and form a containing space, and the distal end of the operating lever 200 extends into the containing space to be engaged with the second locking arms 7. Of course, the number of the first locking arms 6 and the second locking arms 7 may be selected according to actual requirements.

Referring to fig. 5, the proximal end of the first locking arm 6 is connected to the sleeve 210, the distal end extending in a direction towards the clamping mechanism 100, the distal end of the first locking arm 6 being movable. Correspondingly, the distal end of the second locking arm 7 is connected to the clamping mechanism 100, the proximal end extending in a direction towards the handle assembly, the proximal end of the second locking arm 7 being movable.

In the present embodiment, the first locking arm 6 and the second locking arm 7 each have elasticity. When the locking member 8 reaches the locking position, the first locking arm 6 is pressed by the locking member 8, so that the first clamping portion 61 is buckled with the first groove 111. Further, under the drive of the handle assembly, the distal end of the operating rod 200 extends into the accommodating space enclosed by the second locking arm 7, at this time, the second locking arm 7 moves outwards, and when the second groove 202 of the operating rod 200 reaches the position corresponding to the second clamping portion 71, the second locking arm 7 resets under the self elastic action, so that the second clamping portion 71 is buckled with the second groove 202.

In this embodiment, the sleeve 210 is provided with a guiding portion, and the sleeve 110 is provided with a limiting portion, and the limiting portion cooperates with the guiding portion to limit the sleeve 210. Specifically, referring to fig. 15, the guide portion is a guide block 211, and the outer wall of the distal end of the sleeve 210 has at least one guide block 211, and when there are a plurality of guide blocks 211, the plurality of guide blocks 211 are disposed at intervals along the circumferential direction of the sleeve 210. Referring to fig. 14, the limiting portion is a guide groove 112, the inner wall of the proximal end of the sleeve 110 is provided with a plurality of guide grooves 112 adapted to the guide blocks 211, the plurality of guide grooves 112 are arranged at intervals along the circumferential direction of the sleeve 110, and the guide blocks 211 extend into the guide grooves 112 to guide the connection between the sleeve 210 and the sleeve 110.

In this embodiment, the distal end of the guide block 211 has a tip, and the width of the opening of the guide groove 112 is gradually increased in a direction toward the proximal end, thereby facilitating insertion of the guide block 211 into the guide groove 112.

Referring to fig. 4-5, 7-9, and 16-17, the clamping mechanism 100 includes a jaw assembly and a moving member 103, the moving member 103 being drivably connected with the jaw assembly. The second lock arm 7 is provided to the moving member 103. After the locking piece 8 is in the locking position, the operating rod 200 is engaged with the second locking arm 7 under the driving of the handle assembly, and the operating rod 200 can drive the moving piece 103 to move axially to drive the clamping jaw assembly to open or close, so that the clamping jaw assembly performs a releasing action or a grabbing action.

With continued reference to fig. 4-5, 7-9, and 16-17, the jaw assembly includes a torsion spring 104 and pivotally connected first and second jaws 101, 102. The first jaw 101 is connected to the sleeve 110 and the second jaw 102 is drivably connected to the moving member 103. Torsion spring 104 includes a first torsion arm 1041 and a second torsion arm 1042, the first torsion arm 1041 coupled to the first jaw 101 and the second torsion arm 1042 coupled to the second jaw 102 such that the first jaw 101 and the second jaw 102 remain closed when not subjected to an external force. Specifically, referring to fig. 7, the moving member 103 is provided with a chute 1031, the second clamping jaw 102 is provided with a sliding shaft 1021, and the sliding shaft 1021 is slidably disposed in the chute 1031. After the operating lever 200 is engaged with the second locking arm 7, the operating lever 200 moves axially to drive the moving member 103 to move axially, so that the sliding shaft 1021 slides in the sliding groove 1031, and the second clamping jaw 102 rotates relative to the first clamping jaw 101, so that the clamping jaw assembly is opened or closed.

When the surgical instrument is removed, as the lever 200 is pulled proximally, the lever 200 moves the displacement member 103 proximally, causing the jaw assembly to open and remain open. When the lever 200 is fully disengaged from the second locking arm 7, the jaw assembly is closed and remains closed under the influence of the torsion spring 104. If torsion spring 104 were not provided, the jaw assembly would continue to remain open when lever 200 is fully disengaged from second locking arm 7, which would make it difficult to remove it from the body because end effector 1 is inside the abdominal cavity.

Referring to fig. 4 to 8, the surgical extractor further includes a first restoring member 17, a first abutment block 201 is provided at a proximal end of the operating lever 200, a second abutment block 161 is provided at the mounting portion 16 of the fixed handle 4, the first restoring member 17 is sleeved on the operating lever 200 and abuts against the first abutment block 201 and the second abutment block 161, respectively, and when the movable handle 3 is released, the first restoring member 17 drives the operating lever 200 to move proximally to open the jaw assembly of the clamping mechanism 100. Specifically, pressing on the movable handle 3, the movable handle 3 rotates counterclockwise relative to the fixed handle 4, causing the lever 200 to move distally relative to the sleeve 210, thereby closing the jaw assembly, and the first restoring member 17 is compressed. Releasing the movable handle 3, under the influence of the first restoring member 17, the movable handle 3 rotates clockwise relative to the fixed handle 4, causing the lever 200 to move proximally relative to the sleeve 210, thereby causing the jaw assembly to open. In this embodiment, the second abutment block 161 is a stainless steel gasket, which prevents scratching the silicone gasket in the mounting portion 16.

It should be noted that, during use, the second locking arm 7 and the operation lever 200 cannot be separated because: pressing the movable handle 3, the lever 200 moves distally, the jaw assembly closes, and the lever 200 remains in a tendency to move distally all the time under the action of the movable handle 3, without disengaging from the second locking arm 7. Releasing the movable handle 3, the torsion spring 104 of the jaw assembly applies torsion to the second jaw 102 such that the second jaw 102 tends to close, such that the lever 200 tends to move distally, the lever 200 moves proximally against the action of the torsion spring 104 under the influence of the first return member 17 to return, and the jaw assembly opens, during which the snap-fit force between the second snap-fit portion 71 of the resilient second locking arm 7 and the second groove 202 of the lever 200 is able to overcome the force of the first return member 17 and the force of the torsion spring 104, thereby maintaining the engagement between the second snap-fit portion 71 of the second locking arm 7 and the second groove 202 of the lever 200. That is, during use of the surgical instrument, the force during use does not disengage the second clamping portion 71 from the second channel 202, and only when the surgical instrument is removed, a large force is applied and the end effector 1 is clamped to disengage the two.

Referring to fig. 4 to 8, the surgical extractor further includes a connection tube 10, both ends of the connection tube 10 being connected to the sleeve 210 and the mounting portion 16 of the fixed handle 4, respectively. The actuating mechanism comprises an actuating piece 9, a transmission piece 5 and a second reset piece 18, wherein the actuating piece 9 is sleeved on the connecting pipe 10, and the transmission piece 5 is detachably connected with the actuating piece 9. The proximal end of the locking member 8 extends into the actuating member 9 and abuts the transmission member 5, and the second restoring member 18 abuts the proximal end of the locking member 8 and the mounting portion 16 of the fixed handle 4, respectively, and the actuating member 9 moves proximally to drive the locking member 8 from the locked position to the unlocked position. The second reset element 18 is used for driving the locking element 8 to return from the unlocking position to the locking position. That is, the second restoring member 18 biases the locking member 8 toward the locking position, and the actuating member 9 drives the locking member 8 from the locking position to the unlocking position against the biasing force of the second restoring member 18.

Specifically, referring to fig. 5 and 7, the distal end of the locking member 8 has a pushing portion 81 protruding from the outer surface of the locking member 8, and the transmission member 5 abuts against the distal end side of the pushing portion 81. When the actuating member 9 is pulled proximally, the transmission member 5 pushes the pushing portion 81 proximally, so that the locking member 8 moves proximally to reach the unlocked position.

In this embodiment, the first return member 17 and the second return member 18 are both springs.

In this embodiment, the actuating element 9 can be designed in the form of a wrench for ease of operation.

In the present embodiment, the transmission member 5 has a through hole that communicates with the outside and with the inside of the shaft assembly 2 of the operating mechanism. With the above arrangement, the cleaning liquid can be injected into the shaft assembly 2 through the transmission 5 to clean the shaft assembly 2 and the end effector 1. Further, the transmission part 5 is in threaded connection with the actuating part 9, a sealing ring is arranged at the joint to prevent the cleaning liquid from overflowing and losing, and a silica gel sealing gasket is arranged between the operating rod 200 and the mounting part 16 of the fixed handle 4 to prevent the cleaning liquid from flowing into the handle assembly to overflow and lose.

The following will describe the method and principle of use of the surgical extractor of the present embodiment:

when the surgical extractor is used, the bag body 13 is placed in the abdominal cavity, then the resections separated from the normal tissues are placed in the bag body 13 from the bag opening 131, and then the bag opening 131 of the bag body 13 is pulled out of the body from the abdominal cavity.

After the opening 131 of the bag 13 is pulled out of the body from one puncture channel of the abdominal cavity, the shaft assembly 2 is inserted into the abdominal cavity from the other puncture channel, the actuating member 9 and the handle assembly are both disposed outside the abdominal cavity, the end effector 1 can be additionally fixed in the abdominal cavity by using a common clamp or other instruments, then the actuating member 9 is pulled proximally to move the locking member 8 to the unlocking position, the sleeve 210 is inserted into the sleeve 110, the actuating member 9 is released at this time, the locking member 8 is moved distally to the locking position under the action of the second reset member 18, the first clamping portion 61 of the first locking arm 6 is matched with the first groove 111 of the sleeve 110, and the locking member 8 is matched with the first locking arm 6 to lock the sleeve 210 and the sleeve 110. The distal ends of the operating lever 200 do not enter the plurality of second locking arms 7 at this time.

After the sleeve 210 is locked with the sleeve 110, the movable handle 3 is pressed at this time, so that the operating rod 200 moves distally, and thus the distal end of the operating rod 200 enters the accommodating space surrounded by the plurality of second locking arms 7, and the second clamping portion 71 of the second locking arm 7 is buckled with the second groove 202 of the operating rod 200 to complete connection. Thereby, the shaft assembly 2 of the surgical instrument is assembled with the end effector 1.

After the assembly of the rod body assembly 2 and the end effector 1 is completed, the movable handle 3 is actuated to rotate relative to the fixed handle 4, so that the clamping jaw assembly clamps the cut-out objects in the bag body, and other surgical instruments are adopted to treat the cut-out objects and take out the cut-out objects out of the body under the auxiliary clamping of the surgical instruments in the embodiment.

After the resections are removed to the outside of the body, the shaft assembly 2 of the other surgical instrument and the surgical instrument other than the present embodiment is removed to the outside of the body. The shaft assembly 2 in this embodiment is taken out in the following manner: the lever 200 is disengaged from the second locking arm 7 by securing the end effector 1 in the abdominal cavity using a conventional clamp or other instrument, and then pulling the actuator 9 proximally to move the locking member 8 to the unlocked position and continuing to pull the entire shaft assembly. Thus, the shaft assembly 2 is detached from the end effector 1, and the shaft assembly 2 is removed from the abdominal cavity. After the shaft assembly 2 is removed from the abdominal cavity, the bag 13 is withdrawn from the abdominal cavity, and the end effector 1 provided in the bag 13 is removed to the outside.

In summary, in the present embodiment, the end effector 1 and the operating mechanism of the surgical instrument are detachably connected, and when the surgical instrument is taken out, the end effector 1 does not need to be separated from the bag body, but is drawn out along with the bag body 13, so that interstitial fluid stained with the end effector 1 does not pollute the inside of the abdominal cavity, and the risk of pollution diffusion is avoided.

In this embodiment, the first locking arm 6 and the second locking arm of the connecting mechanism are locked in two steps in sequence, so that the end effector 1 and the operating mechanism are assembled and locked, and the problem that a doctor needs to align the first locking arm 6 and the second locking arm 7 simultaneously and is inconvenient to operate when the first locking arm 6 and the second locking arm 7 are locked simultaneously is avoided, so that the end effector 1 and the operating mechanism are assembled more conveniently and efficiently, and the operation time is saved.

Claims (11)

1. A surgical extractor comprising a pocket and a surgical instrument, the surgical instrument comprising a handle assembly, an operating mechanism, an end effector, and a connecting mechanism; the handle assembly includes a movable handle; the end effector with bag body sealing connection and set up in at least part in the inside of bag body, operating device is located the bag body the outside and through coupling mechanism with end effector detachably connects, coupling mechanism includes:

The locking piece is arranged on the operating mechanism and provided with an unlocking position and a locking position;

the actuating mechanism is arranged on the operating mechanism and connected with the locking piece, and the actuating mechanism drives the locking piece to switch between the unlocking position and the locking position;

A first locking arm;

a second locking arm disposed on one of the end effector and the operating mechanism and detachably engaged with the other, the second locking arm being disposed on one of the end effector and the operating mechanism and detachably engaged with the other; the lock is in the unlocked position, the first lock arm is separated from the other of the end effector and the operating mechanism; the locking member is in the locked position and the locking member restrains the first locking arm to engage the first locking arm with the other of the end effector and the operating mechanism when the second locking arm engages the other of the end effector and the operating mechanism in response to the movable handle being closed to thereby lock the end effector with the operating mechanism.

2. The surgical retractor of claim 1, wherein the operating mechanism comprises a shaft assembly, the end effector comprises a clamping mechanism and a sleeve coupled to the clamping mechanism, the shaft assembly comprises an operating rod and a sleeve disposed over the operating rod, the sleeve is detachably coupled to the sleeve, and the clamping mechanism is detachably coupled to the operating rod.

3. A surgical harvester as in claim 2, wherein the first locking arm is disposed on one of the sleeve and the cannula and is detachably engaged with the other, and the second locking arm is disposed on one of the clamping mechanism and the lever and is detachably engaged with the other.

4. A surgical harvester as in claim 3 wherein the handle assembly is disposed proximal to the shaft assembly, the movable handle being drivingly connected to the lever, the lever being movable in an axial direction of the shaft assembly in response to rotation of the movable handle.

5. A surgical harvester as in claim 4, wherein the movable handle abuts the proximal end of the lever, the lever moving linearly in response to rotation of the movable handle.

6. A surgical harvester as in claim 4, wherein the locking member is disposed between the lever and the cannula, the locking member being in the locked position, an outer wall of the locking member abutting the first locking arm to restrain the first locking arm such that one of the cannula and the sleeve engages the other.

7. The surgical retractor of claim 6, wherein the first locking arm is disposed on the cannula and is detachably engaged with an inner wall of the sleeve and the second locking arm is disposed on the clamping mechanism and is detachably engaged with an outer wall of the lever; the locking member is in the unlocked position with the first locking arm separated from the inner wall of the sleeve and in the locked position with the locking member restraining the first locking arm to engage the first locking arm with the inner wall of the sleeve, at which time the lever moves distally to engage the second locking arm with the outer wall of the lever in response to the movable handle being closed to lock the end effector with the operating mechanism.

8. The surgical extractor of claim 7 wherein,

The number of the first locking arms is at least two, and the at least two first locking arms are arranged at intervals along the circumferential direction of the sleeve; and/or

The number of the second locking arms is at least two, the at least two second locking arms are arranged at intervals along the circumferential direction of the clamping mechanism and form a containing space, and the distal end of the operating rod extends into the containing space to be engaged with the second locking arms.

9. The surgical extractor of claim 7 wherein the clamping mechanism includes a jaw assembly and a moving member drivingly connected with the jaw assembly; the second locking arm is arranged on the moving piece; after the operating rod is engaged with the second locking arm, the operating rod moves along the axial direction to drive the moving piece to move along the axial direction so as to open or close the clamping jaw assembly.

10. A surgical object picker according to claim 9, wherein the jaw assembly includes a torsion spring and pivotally connected first and second jaws, the first jaw being connected to the sleeve, the second jaw being drivingly connected to the moveable member, a first torsion arm of the torsion spring being connected to the first jaw, a second torsion arm of the torsion spring being connected to the second jaw such that the first and second jaws remain closed when not subjected to an external force.

11. The surgical extractor according to claim 2, wherein the distal end of the sleeve has a guide block, the inner wall of the proximal end of the sleeve has a guide slot adapted to the guide block, and the guide block extends into the guide slot to guide the connection of the sleeve and the sleeve.