Shaft assembly used for being matched with puncture outfit and hemostatic forceps

Abstract

The utility model provides a shaft assembly used for being matched with a puncture outfit and hemostatic forceps. The shaft assembly comprises a transmission structure, a clamping bin, a percussion structure, a percussion block, a clamp, a tube body, a first sleeve and a second sleeve. The tube body, the first sleeve and the second sleeve are sequentially communicated from near to far, the far end of the tube body is fixedly connected with the near end of the first sleeve, the second sleeve is located on the far side of the first sleeve, the near end of the second sleeve is fixedly connected with the percussion structure, and the far end of the second sleeve is fixedly connected with the percussion block; the transmission structure is contained in the tube body, the clamping bin is arranged in the first sleeve and the second sleeve in a penetrating mode, the clamping bin is fixed relative to the first sleeve or the tube body, and the jaw is installed at the far end of the clamping bin; the near end of the percussion structure is inserted into the tube body to be matched with the transmission structure so as to be driven by the transmission structure to move towards the far side, and the percussion block closes the clamp. When the device is matched with a puncture outfit for use, the clamping bin assembly does not retreat in the percussion process, and blood vessel traction is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a shaft assembly and a hemostatic forceps used for matching with a puncture device. Background Art

[0002] To fully expose the surgical field of view during surgery, it is necessary to ligate the blood vessels surrounding the target tissue to stop bleeding. Hemostasis has become one of the core basic surgical techniques. Surgical procedures on any part of the human body almost invariably involve bleeding and hemostasis, and hemostatic forceps and ligature clips are generally used to close and stop bleeding.

[0003] Current hemostatic forceps in clinical use typically consist of a handle and shaft assembly arranged from proximal to distal. The upper end of the handle forms an adapter, and the proximal end of the shaft assembly connects to the distal end of the adapter. The shaft assembly includes a cannula extending in the proximal-distal direction and a jaw located distally. The adapter drives the cannula distally, squeezing the jaws and engaging the ligating clip within them.

[0004] When the hemostatic forceps are used in laparoscopic surgery, the cannula needs to be inserted into the trocar so that the distal end of the shaft assembly (including the jaws) is located inside the human body to perform hemostasis on the blood vessel. The trocar is fixed to the patient's body, and the cannula is inserted into the trocar. There is a large frictional force between the cannula and the trocar, especially between the cannula and the one-way valve of the trocar used to maintain positive abdominal pressure. During the firing process of the hemostatic forceps (i.e., the process in which the adapter drives the cannula to move distally), the large frictional force between the cannula and the trocar will cause the main body of the hemostatic forceps (including the jaws) to retreat, causing the cannula and the main body of the hemostatic forceps to move relative to each other. In this way, the ligating clamp will pull on the blood vessel when it is fastened to the blood vessel, which may easily tear the blood vessel.

[0005] Therefore, there is an urgent need for an improved shaft assembly and hemostatic forceps for matching with a puncture device. Utility Model Content

[0006] (1) Technical issues to be resolved

[0007] In view of the problems existing in the above technology, the present invention solves the problems at least to a certain extent. To this end, the present invention provides a shaft assembly and a hemostatic forceps for matching with a trocar.

[0008] (2) Technical solution

[0009] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0010] In the first aspect, the utility model provides an axis assembly for cooperating with a puncture device, comprising a transmission structure, a clamping magazine, a firing structure, a firing block, a clamp, a tube body, a first sleeve and a second sleeve; the tube body, the first sleeve and the second sleeve are connected in sequence from near to far, the distal end of the tube body is fixedly connected to the proximal end of the first sleeve, the second sleeve is located on the distal side of the first sleeve, the proximal end of the second sleeve is fixedly connected to the firing structure, and the distal end of the second sleeve is fixedly connected to the firing block; the transmission structure is accommodated in the tube body, the clamping magazine is passed through the first sleeve and the second sleeve, the clamping magazine is fixed relative to the first sleeve or the tube body, and the jaws are installed at the distal end of the clamping magazine; the proximal end of the firing structure is inserted into the tube body and cooperates with the transmission structure to be driven by the transmission structure to move distally, so that the firing block closes the clamp.

[0011] Optionally, the distal end of the firing structure is inserted into the first sleeve and passes through the first sleeve distally to form a protruding portion, and the protruding portion is inserted into the second sleeve and fixedly connected to the second sleeve.

[0012] Optionally, the position of the jaws relative to the first cannula or tube is fixed.

[0013] Optionally, the firing structure can move between an initial position and a firing position arranged in sequence from near to far, and the firing structure is in the initial position, and the proximal end surface of the second sleeve abuts against the distal end surface of the first sleeve.

[0014] Optionally, the proximal end of the clamping magazine and the proximal end of the first sleeve are both inserted into the tube body, and a positioning pin perpendicular to the clamping magazine is provided in the tube body, and the two ends of the positioning pin are respectively connected to the two opposite walls of the tube body; the proximal end of the clamping magazine corresponds to the position of the positioning pin and is provided with a first positioning hole that is adapted to the cross-sectional shape of the positioning pin, and the proximal end of the first sleeve corresponds to the position of the positioning pin and is provided with a second positioning hole that is adapted to the cross-sectional shape of the positioning pin, and the positioning pin passes through the first positioning hole and the second positioning hole.

[0015] Optionally, the shaft assembly also includes an inner liner, which is fixedly installed in the first sleeve and located at the bottom of the first sleeve. A mounting position is formed on the inner liner, and the clamping magazine is placed on the mounting position. The left side wall of the clamping magazine abuts against the inner liner, the right side wall of the clamping magazine abuts against the inner liner, and the top of the clamping magazine abuts against the firing structure.

[0016] Optionally, the distal end of the liner is inserted into the second sleeve; during the process of the second sleeve moving distally, the distal end of the liner is always inserted into the second sleeve.

[0017] Optionally, the proximal end of the first sleeve is inserted into the tubular body and has an interference fit with the tubular body.

[0018] Optionally, a reset member is provided between the first sleeve and the second sleeve, the first end of the reset member is connected to the distal end face of the first sleeve, and the second end of the reset member is connected to the proximal end face of the second sleeve; when the firing structure moves distally, the reset member undergoes elastic deformation.

[0019] In a second aspect, the present invention provides a hemostatic forceps having the shaft assembly described above for cooperating with a trocar.

[0020] (3) Beneficial effects

[0021] The beneficial effects of the utility model are:

[0022] The shaft assembly and hemostatic forceps provided by the present invention are used in laparoscopic surgery. The distal end of the shaft assembly is inserted into the puncture device, the outer wall of the first sleeve contacts the inner wall of the puncture device, and the second sleeve is located at the distal side of the puncture device and does not contact the inner wall of the puncture device. During the firing process, the transmission structure drives the firing structure, the second sleeve and the firing block to move distally as a whole, so that the firing block squeezes the opposite sides of the jaws to buckle the ligation clamp. The firing process will not cause the shaft assembly to retreat, thereby preventing the ligation clamp from pulling on the blood vessel and tearing the blood vessel when buckling it. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is described with the help of the following drawings:

[0024] Figure 1 Schematic cross-sectional view of the hemostatic forceps according to Example 1 of the present utility model;

[0025] Figure 2 for Figure 1 Enlarged schematic diagram of point A in the middle.

[0026] [Description of Reference Numerals]

[0027] 1: Transmission structure;

[0028] 2: clamping compartment;

[0029] 21: lining;

[0030] 3: Firing structure;

[0031] 4: Firing block;

[0032] 5: jaws;

[0033] 6: Pipe body;

[0034] 61: positioning pin;

[0035] 7: First casing;

[0036] 8: Second sleeve;

[0037] 91: Handle; 92: Trigger. DETAILED DESCRIPTION

[0038] It should be noted that the “near” mentioned in this article refers to the side close to the operator, and the “far” refers to the side close to the patient. The directional terms such as “upper”, “lower”, “front”, “back”, “left” and “right” mentioned in this article are in the order of Figure 1 The orientation is used as a reference, and the direction from front to back is also the direction from far to near.

[0039] Example 1

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a hemostatic forceps, which includes a shaft assembly and a handle.

[0041] Among them, the shaft assembly includes a transmission structure 1, a clamping magazine 2, a clamping structure, a firing structure 3, a firing block 4, a jaw 5, a tube body 6, a first sleeve 7 and a second sleeve 8.

[0042] The tubular body 6, the first sleeve 7, and the second sleeve 8 are sequentially connected from proximal to distal. The distal end of the tubular body 6 is fixedly connected to the proximal end of the first sleeve 7, and the second sleeve 8 is located distal to the first sleeve 7. The tubular body 6 can be the outer shell of the proximal end of the shaft assembly, or a component within the proximal end outer shell of the shaft assembly. The tubular body 6 itself can be a single piece or a split piece. One of the functions of the tubular body 6 is to provide a limiting structure on its inner wall to limit the movable position of the movable component.

[0043] The transmission structure 1 is housed within the tubular body 6. The clip compartment 2 is inserted into the first and second sleeves 7 and 8, and is fixed relative to the first sleeve 7 or the tubular body 6. The distal end of the clip delivery structure is inserted into the first sleeve 7, and the proximal end of the clip delivery structure is inserted into the tubular body 6 to cooperate with the transmission structure 1. The transmission structure 1 moves distally, driving the clip delivery structure to move distally, pushing the ligating clip in the clip compartment 2 into the jaws 5. The transmission structure 1 moves proximally, allowing the clip delivery structure to return to its initial state after pushing the ligating clip. The jaws 5 are installed at the distal end of the clamping magazine 2, the distal end of the firing structure 3 is inserted into the first sleeve 7 and passes through the first sleeve 7 distally, the part where the distal end of the firing structure 3 passes through the first sleeve 7 distally is the extension part, the proximal end of the firing structure 3 is inserted into the tube body 6 and cooperates with the transmission structure 1, the proximal end of the second sleeve 8 is fixedly connected to the extension part, the distal end of the second sleeve 8 is fixedly connected to the firing block 4, and the transmission structure 1 moves distally, which can drive the firing structure 3, the second sleeve 8 and the firing block 4 to move distally as a whole, so that the firing block 4 squeezes the opposite sides of the jaws 5 to buckle the ligation clamp, and the transmission structure 1 moves proximally, allowing the firing structure 3, the second sleeve 8 and the firing block 4 to be reset to the initial state as a whole.

[0044] The shaft assembly configured in this way is used for laparoscopic surgery, and the distal end of the shaft assembly is inserted into the puncture device, the outer wall of the first sleeve 7 contacts the inner wall of the puncture device, and the second sleeve 8 is located on the distal side of the puncture device and does not contact the inner wall of the puncture device. During the firing process, the transmission structure 1 drives the firing structure 3, the second sleeve 8 and the firing block 4 to move distally as a whole, so that the firing block 4 squeezes the opposite sides of the jaws 5 to buckle the ligation clamp. The firing process will not cause the shaft assembly to retreat, thereby preventing the ligation clamp from pulling on the blood vessel and tearing the blood vessel when buckling it.

[0045] Preferably, the position of the jaws 5 relative to the first sleeve 7 or the tubular body 6 is fixed.

[0046] Preferably, the firing mechanism 3 is movable between an initial position and a firing position, arranged sequentially from proximal to distal. In the initial position, the proximal end face of the second sleeve 8 abuts the distal end face of the first sleeve 7. When the firing mechanism 3 is in the firing position, the firing block 4 closes the jaws 5. In this manner, the cooperation between the first sleeve 7 and the second sleeve 8 limits the travel of the firing mechanism 3, thereby ensuring more stable operation of the shaft assembly. Alternatively, when the firing mechanism 3 is in the initial position, the second sleeve 8 is separated from the first sleeve 7.

[0047] Preferably, the shaft assembly further includes an inner liner 21, which is fixedly mounted within the first sleeve 7 and located at the bottom of the first sleeve 7. The inner liner 21 is formed with a mounting position, and the clip cartridge 2 is placed on the mounting position. The left side wall of the clip cartridge 2 abuts against the inner liner 21, the right side wall of the clip cartridge 2 abuts against the inner liner 21, and the top of the clip cartridge 2 abuts against the firing mechanism 3. This facilitates the installation of the clip cartridge 2 within the first sleeve 7 and simultaneously limits the position of the clip cartridge 2 in the left-right and up-down directions.

[0048] Further preferably, the proximal end of the clamping cartridge 2 is inserted into the tubular body 6. A positioning pin 61 is provided in the tubular body 6 perpendicular to the clamping cartridge 2. The two ends of the positioning pin 61 are connected to two opposite walls of the tubular body 6. A first positioning hole is provided at the proximal end of the clamping cartridge 2 at a position corresponding to the positioning pin 61, and the positioning pin 61 is inserted through the first positioning hole. In this way, the clamping cartridge 2 is fixedly installed.

[0049] Further preferably, the proximal end of the first sleeve 7 is inserted into the tubular body 6. A second positioning hole is provided at the proximal end of the first sleeve 7, corresponding to the position of the positioning pin 61, and the positioning pin 61 is disposed through the second positioning hole. This facilitates the secure installation of the first sleeve 7 on the tubular body 6. Simultaneously, the tubular body 6 is connected to the clamping chamber 2 and the first sleeve 7 through the same positioning pin 61, making the clamping chamber assembly structure simpler and more compact.

[0050] Specifically, in this embodiment, the positioning pin 61 is cylindrical, that is, the cross-section of the positioning pin 61 is circular. Correspondingly, the first positioning hole and the second positioning hole are both circular.

[0051] Further preferably, the distal end of the liner 21 is inserted into the second sleeve 8 ; and during the process of the second sleeve 8 moving distally, the distal end of the liner 21 is always inserted into the second sleeve 8 .

[0052] Further preferably, the proximal end of the first sleeve 7 is inserted into the tubular body 6 and is interference fit with the tubular body 6. In this way, the first sleeve 7 is fixedly installed on the tubular body 6.

[0053] The handle includes a grip 91 and a trigger 92. The first end of the trigger 92 is resiliently rotatably mounted on the grip 91, and the second end of the trigger 92 is spaced apart from the grip 91 to form a V-shaped opening. When the trigger 92 is squeezed, it elastically rotates, and the second end of the trigger 92 approaches the grip 91, narrowing the V-shaped opening. When the trigger 92 is released, it elastically returns, and the second end of the trigger 92 moves away from the grip 91, widening the V-shaped opening.

[0054] The trigger 92 is in transmission connection with the transmission structure 1. When the trigger 92 is squeezed, the transmission structure 1 moves distally in response to the actuation of the trigger 92, driving the shaft assembly to work. When the trigger 92 is released, the transmission structure 1 is allowed to automatically return to its initial state.

[0055] It should be noted that this embodiment is illustrated by taking the continuous-type manual hemostatic forceps as an example, which should not be understood as a limitation of the present invention. The improvement scheme proposed in the present invention is also applicable to the continuous-type automatic hemostatic forceps and the single-type hemostatic forceps.

[0056] Example 2

[0057] The difference between this embodiment and embodiment 1 is that:

[0058] A reset member is disposed between the first sleeve 7 and the second sleeve 8. Its first end is connected to the distal end of the first sleeve 7, and its second end is connected to the proximal end of the second sleeve 7. As the firing mechanism moves distally, the reset member elastically deforms. As the transmission mechanism moves proximally, the elastic deformation of the reset member is restored, facilitating the return of the firing mechanism to its initial state. The reset member may be a spring, a rubber member, or the like.

[0059] Preferably, the reset member is a spring, and the firing structure 3 and the lining 21 are both provided with springs.

[0060] The rest of the content is similar to that of Example 1 and will not be repeated here.

[0061] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0062] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0063] In the present invention, unless otherwise expressly specified or limited, when a first feature is “above” or “below” a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0064] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A shaft assembly for use with a trocar, characterized in that: It comprises a transmission structure (1), a clamping chamber (2), a firing structure (3), a firing block (4), a clamp (5), a tube body (6), a first sleeve (7) and a second sleeve (8); The tube body (6), the first sleeve (7) and the second sleeve (8) are sequentially connected from near to far, the distal end of the tube body (6) is fixedly connected to the proximal end of the first sleeve (7), the second sleeve (8) is located on the distal side of the first sleeve (7), the proximal end of the second sleeve (8) is fixedly connected to the firing structure (3), and the distal end of the second sleeve (8) is fixedly connected to the firing block (4); the transmission structure (1) is accommodated in the tube body (6), the clamping chamber (2) is passed through the first sleeve (7) and the second sleeve (8), the clamping chamber (2) is fixed relative to the first sleeve (7) or the tube body (6), and the jaws (5) are installed at the distal end of the clamping chamber (2); The proximal end of the firing structure (3) is inserted into the tube body (6) and cooperates with the transmission structure (1) so as to be driven by the transmission structure (1) to move distally, causing the firing block (4) to close the clamp (5); The distal end of the shaft assembly is inserted into the puncture device, the outer wall of the first sleeve contacts the inner wall of the puncture device, and the second sleeve is located at the distal side of the puncture device.

2. The shaft assembly for use with a trocar according to claim 1, wherein: The distal end of the firing structure (3) is inserted into the first sleeve (7) and passes through the first sleeve (7) distally to form a protruding portion, and the protruding portion is inserted into the second sleeve (8) and fixedly connected to the second sleeve (8).

3. The shaft assembly for use with a trocar according to claim 1, wherein: The position of the jaws (5) relative to the first sleeve (7) or the tubular body (6) is fixed.

4. The shaft assembly for use with a trocar according to claim 1, wherein: The firing structure (3) can move between an initial position and a firing position arranged in sequence from near to far. When the firing structure (3) is in the initial position, the proximal end surface of the second sleeve (8) abuts against the distal end surface of the first sleeve (7).

5. The shaft assembly for use with a trocar according to claim 1, wherein: The proximal end of the clamping chamber (2) and the proximal end of the first sleeve (7) are both inserted into the tube body (6). A positioning pin (61) perpendicular to the clamping chamber (2) is provided in the tube body (6). The two ends of the positioning pin (61) are respectively connected to the two opposite tube walls of the tube body (6). A first positioning hole adapted to the cross-sectional shape of the positioning pin (61) is provided at the position corresponding to the positioning pin (61) at the proximal end of the clamping magazine (2), and a second positioning hole adapted to the cross-sectional shape of the positioning pin (61) is provided at the position corresponding to the positioning pin (61) at the proximal end of the first sleeve (7), and the positioning pin (61) passes through the first positioning hole and the second positioning hole.

6. The shaft assembly for use with a trocar according to claim 5, wherein: The invention also includes an inner lining (21), which is fixedly installed in the first sleeve (7) and located at the bottom of the first sleeve (7). A mounting position is formed on the inner lining (21), and the clamping bin (2) is placed on the mounting position. The left side wall of the clamping bin (2) abuts against the inner lining (21), the right side wall of the clamping bin (2) abuts against the inner lining (21), and the top of the clamping bin (2) abuts against the firing structure (3).

7. The shaft assembly for use with a trocar according to claim 6, wherein: The distal end of the liner (21) is inserted into the second sleeve (8); and during the process of the second sleeve (8) moving distally, the distal end of the liner (21) is always inserted into the second sleeve (8).

8. The shaft assembly for use with a trocar according to claim 5, wherein: The proximal end of the first sleeve (7) is inserted into the tubular body (6) and is interference-fitted with the tubular body (6).

9. The shaft assembly for use with a trocar according to claim 1, wherein: A reset member is provided between the first sleeve (7) and the second sleeve (8), wherein a first end of the reset member is connected to the distal end face of the first sleeve (7), and a second end of the reset member is connected to the proximal end face of the second sleeve (7); when the firing structure moves distally, the reset member undergoes elastic deformation.

10. A hemostatic forceps, characterized in that: A shaft assembly for cooperating with a trocar as claimed in any one of claims 1 to 9.

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