Minimally invasive channel ring shear apparatus

Abstract

The minimally invasive channel ring shear instrument comprises an outer pipe shear and an inner pipe shear, the outer pipe shear is of a tubular structure, the inner pipe shear is rotationally arranged in an inner hole of the outer pipe shear, an outer shear blade is arranged at the far end of the outer pipe shear, an inner shear blade is arranged at the far end of the inner pipe shear, and the outer shear blade and the inner shear blade are arranged in a staggered mode. When the outer pipe shear and the inner pipe shear rotate coaxially, the outer shear blade and the inner shear blade conduct shearing action. Human tissue is sheared in a rotary shearing mode, ring shear is formed, and the slender rod-shaped ring shear instrument is small in occupied channel diameter, small in damage to the human tissue, small in occupied space of an operation and not prone to damaging the human tissue except an operation site.

Description

Technical Field

[0001] The utility model relates to the technical field of laparoscopic medical surgical instruments, in particular to a minimally invasive channel ring shear instrument. Background Art

[0002] Minimally invasive surgery has become widespread today. Minimally invasive surgery is less invasive, reduces pain, and speeds recovery, making it highly sought after by both patients and their doctors. Currently, all surgeries prioritize the possibility of minimally invasive surgery, making innovation in minimally invasive surgical instruments crucial.

[0003] Current laparoscopic surgeries require multiple instruments, as instruments with limited functionality often require multiple channels. This necessitates the use of multiple instruments in a single minimally invasive procedure. This necessitates multiple incisions, hindering patient recovery. Even with this, the need to frequently change instrument access channels significantly impacts surgical efficiency. Furthermore, multiple channels require multiple instruments, and in the confined environment of the abdominal and thoracic cavities, these instruments can easily interfere with and collide with each other, compromising the surgical field of view. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide a minimally invasive channel ring shearing instrument, which shears human tissue by rotating shearing to form a ring shear, and the slender rod-shaped ring shearing instrument occupies a small channel diameter, causes little damage to human tissue, occupies a small space for surgery, and is not easy to damage human tissue other than the surgical site.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A minimally invasive channel ring shear instrument includes an outer tube shear and an inner tube shear. The outer tube shear is a tubular structure. The inner tube shear is rotatably arranged in the inner hole of the outer tube shear. The distal end of the outer tube shear is provided with an outer shear blade, and the distal end of the inner tube shear is provided with an inner shear blade. When the outer tube shear and the inner tube shear rotate coaxially, the outer shear blade and the inner shear blade perform a shearing action.

[0007] Furthermore, the outer shape of the outer scissor blade is rectangular, trapezoidal or triangular, and the outer shape of the inner scissor blade is rectangular, trapezoidal or triangular.

[0008] Furthermore, it also includes a movable pin, and an outer inclined long groove is provided on the proximal tube wall of the outer tube shear, and the movable pin is slidably arranged in the outer inclined long groove.

[0009] Furthermore, it also includes a fixed handle and a movable handle, the movable handle rotates and slides relative to the fixed handle, the fixed handle is fixedly connected to the movable pin, and the movable handle is fixedly connected to the proximal end of the outer tube shears.

[0010] Furthermore, the fixed handle is a rod-shaped structure, the movable handle is a tubular structure, and the movable handle is slidably sleeved on the outside of the fixed handle.

[0011] Furthermore, a spring is included, and the spring is arranged between the fixed handle and the movable handle.

[0012] Furthermore, the inner tube shear is provided with a protrusion or flange to prevent axial sliding relative to the outer tube shear.

[0013] Furthermore, an inner inclined long groove is provided on the proximal tube wall of the inner tube shear, and the inner inclined long groove and the outer inclined long groove are symmetrically arranged relative to the horizontal central axis of the outer tube shear, and the movable pin is slidably arranged in the inner inclined long groove.

[0014] Furthermore, an inner straight long groove communicating with the distal end of the inner inclined long groove is provided on the tube wall of the inner tube shear, and an outer straight long groove communicating with the distal end of the outer inclined long groove is provided on the tube wall of the outer tube shear.

[0015] Furthermore, the inner tube shear is axially slidably arranged relative to the outer tube shear, and the movable pin is fixed on the proximal tube wall of the inner tube shear.

[0016] Furthermore, the inner tube shear is a tubular structure.

[0017] The beneficial effects of the present invention are as follows: the outer tube scissors and the inner tube scissors still have a slender rod-shaped structure after being assembled, and the diameter of the channel opened on the human body during surgery can be as small as possible. The outer tube scissors and the inner tube scissors adopt a coaxial rotating shearing method, and the overall width will not increase during the shearing process, so that the space occupied during the operation is minimized, thereby not easily damaging human tissue other than the surgical site, thereby improving the safety and success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a minimally invasive channel ring shearing instrument according to an embodiment of the present invention;

[0019] Figure 2 This is a partial enlarged view of the distal end of the minimally invasive channel ring shearing instrument according to an embodiment of the present utility model;

[0020] Figure 3 This is a partial enlarged view of the distal end of the minimally invasive channel ring shearing instrument according to an embodiment of the present invention when the outer tube shears are separated from the inner tube shears;

[0021] Figure 4 This is a schematic diagram of the distal end of the minimally invasive channel ring shearing instrument according to an embodiment of the present invention after cutting something;

[0022] Figure 5 This is a frontal, sectional, stereoscopic view of a minimally invasive channel ring shearing instrument according to an embodiment of the present invention;

[0023] Figure 6 For the embodiment of the utility model Figure 5 A partial enlarged view of;

[0024] Figure 7 This is a frontal, sectional, stereoscopic view of the proximal end of the minimally invasive channel ring shearing instrument according to an embodiment of the present invention, when the movable pin slides to the outer inclined long slot position;

[0025] Figure 8 This is a partial enlarged view of the proximal end of the minimally invasive channel ring shearing instrument according to an embodiment of the present invention when the outer tube shears are separated from the inner tube shears;

[0026] Figure 9 This is a right side view of the outer tube shear, inner tube shear and movable pin after assembly when the inner tube shear is a tubular structure according to an embodiment of the present invention;

[0027] Figure 10 This is a structural schematic diagram of other instruments according to an embodiment of the present invention using the inner hole of the inner tube shears of the minimally invasive channel ring shear instrument of the present application to enter the human body.

[0028] Description of labels:

[0029] 1. External tube shears; 2. Internal tube shears; 3. Movable pin; 4. Fixed handle; 5. Movable handle; 6. Spring; 7. Other instruments

[0030] 11. External shear blade; 12. External inclined long slot; 13. External straight long slot;

[0031] 21. Inner shear blade; 22. Inner inclined long groove; 23. Inner straight long groove. DETAILED DESCRIPTION

[0032] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0033] Please refer to Figures 1 to 10 , the embodiments provided by the present utility model are:

[0034] A minimally invasive channel ring shearing instrument comprises an outer tube shear 1 and an inner tube shear 2. The outer tube shear 1 is a tubular structure, and the inner tube shear 2 is rotatably disposed in the inner hole of the outer tube shear 1. The outer tube shear 1 is provided with an outer shear blade 11 at its distal end, and the inner tube shear 2 is provided with an inner shear blade 21 at its distal end. When the outer tube shear 1 and the inner tube shear 2 rotate coaxially, the outer shear blade 11 and the inner shear blade 21 perform a shearing action. The distal end of the ring shearing instrument refers to the end that extends into the human body, and the proximal end refers to the end that is operated by the human hand. The portion of the laparoscopic surgical instrument that rises into the human tissue is in the shape of a slender rod. In this application, the inner tube shear 2 is inserted into the inner hole of the outer tube shear 1. After the two are assembled, they still have a slender rod-shaped structure. When performing a shearing action, the inner tube shear 2 only needs to rotate relative to the outer tube shear 1, so that the overall width of the distal end of the ring shearing instrument does not increase during shearing. This reduces the damage to human tissue other than the surgical site during the ring shearing instrument operation, thereby improving the safety and success rate of the operation.

[0035] The outer tube shears 1 and inner tube shears 2 are both slender rod-shaped structures, coaxially arranged and capable of relative rotation. The cutting edge of the outer shear blade 11 and the cutting edge of the inner shear blade 21 face each other, forming a pair of shear blades that rotate with each other for shearing. During shearing, the shear blades do not need to open or close in the width direction; they only need to coaxially rotate the outer tube shears 1 and the inner tube shears 2.

[0036] Specifically, the outer shear blade 11 and the inner shear blade 21 are both sheet-like structures. Since the outer tube shear 1 and the inner tube shear 2 rotate relative to each other, the two opposing surfaces of the outer shear blade 11 and the inner shear blade 21 are both arc surfaces. The surface of the outer shear blade 11 opposing the inner shear blade 21 does not exceed the inner cylindrical surface of the outer tube shear 1. At the same time, the surface of the inner shear blade 21 opposing the outer shear blade 11 does not exceed the inner cylindrical surface of the outer tube shear 1.

[0037] Regarding the top projection shapes of the outer scissor blade 11 and the inner scissor blade 21 , the outer shape of the outer scissor blade 11 is rectangular, trapezoidal, or triangular, and the outer shape of the inner scissor blade 21 is rectangular, trapezoidal, or triangular.

[0038] In order to facilitate manual operation of the inner tube scissors 2 and the outer tube scissors 1 during surgery, one solution is: the proximal end of the inner tube scissors 2 is longer than the proximal end of the outer tube scissors 1. The doctor grasps the tube wall of the outer tube scissors 1 with one hand and grasps the proximal end of the inner tube scissors 2 extending beyond the outer tube scissors 1 with the other hand to operate. During surgery, one hand or both hands can be rotated.

[0039] Furthermore, in order to more accurately control the position and movement of the inner shears 2 relative to the outer shears 1, one solution is to further include a movable pin 3. An outer inclined slot 12 is provided on the proximal wall of the outer shears 1, and the movable pin 3 is slidably disposed within the outer inclined slot 12. During surgery, the surgeon grasps the movable pin 3 with one hand and the outer shears 1 with the other hand, and manually rotates the outer shears 1 to achieve rotation of the outer shears 1 relative to the inner shears 2.

[0040] Specifically, the outer inclined long groove 12 can be one on one side, or two symmetrical ones. In this case, the connection between the inner tube shear 2 and the movable pin 3 can be a fixed connection or a sliding connection. If the outer inclined long groove 12 is one on one side, then there is one movable pin 3, and the movable pin 3 is fixedly connected or slidably connected to the inner tube shear 2. If there are two symmetrical outer inclined long grooves 12, then the movable pin 3 is set to one or two. In this case, if there is one movable pin 3, the movable pin 3 passes through the inner tube shear 2 and extends into the two outer inclined long grooves 12 for sliding; if there are two movable pins 3, they are two coaxial ones, symmetrically arranged on the two sides of the inner tube shear 2 opposite to the outer inclined long groove 12, and the movable pin 3 is fixedly connected or slidably connected to the inner tube shear 2.

[0041] Regarding whether the inner shear 2 can slide axially relative to the outer shear 1, one solution is to allow the inner shear 2 to slide axially relative to the outer shear 1. In this case, the movable pin 3 is fixed to the proximal wall of the inner shear 2. During surgery, the surgeon can grasp the movable pin 3 with one hand and the wall of the outer shear 1 with the other hand to perform the operation.

[0042] Regarding whether the inner tube shear 2 can slide axially relative to the outer tube shear 1, another solution is to prevent the inner tube shear 2 from sliding axially relative to the outer tube shear 1 by providing a protrusion or flange on the inner tube shear 2 to prevent axial sliding relative to the outer tube shear 1. For example, both the proximal and distal ends of the inner tube shear 2 can be provided with outward flanges to prevent the inner tube shear 2 from sliding axially relative to the outer tube shear 1. Alternatively, for example, a single or half-circle groove can be provided on the outer tube shear 1 to match the shape of the protrusion on the inner tube shear 2. The protrusion fits into the groove and can rotate within the groove, allowing the inner tube shear 2 to rotate relative to the outer tube shear 1 without sliding axially.

[0043] If the inner shears 2 cannot slide axially relative to the outer shears 1, one solution is to achieve symmetrical relative rotation between the inner and outer shears 2 and 1 during shearing. The proximal wall of the inner shears 2 is provided with an inner, inclined slot 22. The inner, inclined slot 22 and the outer, inclined slot 12 are arranged symmetrically with respect to the horizontal central axis of the outer shear 1, and the movable pin 3 is slidably disposed within the inner, inclined slot 22. This solution allows the inner and outer shears 2 and 1 to rotate symmetrically during shearing, making the operation more consistent with current human experience of shearing operations. This also allows for more accurate shearing during surgery, improving the success rate of the procedure. During surgery, one hand grasps the movable pin 3, while the other hand grasps the outer shears 1. Rotating the outer shears 1 or the movable pin 3 achieves synchronized relative rotation between the outer and inner shears 1 and 2.

[0044] Furthermore, an inner straight long groove 23 connected to the distal end of the inner inclined long groove 22 is provided on the tube wall of the inner tube shears 2, and an outer straight long groove 13 connected to the distal end of the outer inclined long groove 12 is provided on the tube wall of the outer tube shears 1. In order to allow a forward extending action before the shearing action during operation, the inner scissor blade 21 and the outer scissor blade 11 extend forward to the tissue to be sheared in the open state, making the surgical operation more reasonable.

[0045] Further, in order to facilitate hand operation, refer to Figures 5 to 7 As shown, the outer tube shears 1 and the inner tube shears 2 are further comprised of a fixed handle 4 and a movable handle 5. The movable handle 5 rotates and slides relative to the fixed handle 4. The fixed handle 4 is fixedly connected to the movable pin 3, and the movable handle 5 is fixedly connected to the proximal end of the outer tube shears 1. During the surgical operation, one hand grasps the fixed handle 4 and the other hand grasps the movable handle 5, and the movable handle 5 is pushed and / or the fixed handle 4 is rotated to operate the outer tube shears 1 and the inner tube shears 2.

[0046] The inner tube scissors 2 are provided with an inner linear long groove 23 and an inner inclined long groove 22, and the outer tube scissors 1 are provided with an outer linear long groove 13 and an outer inclined long groove 12. The inner tube scissors 2 can rotate but not slide relative to the outer tube scissors 1. In addition, the movable pin 3 is fixed on the fixed handle 4, and the movable handle 5 is fixed on the outer tube scissors 1 for fixed connection. When performing surgical operations, one hand grasps the fixed handle 4 and the other hand grasps the movable handle 5. When the movable pin 3 slides in the inner linear long groove 23 and the outer linear long groove 13, the inner scissor blade 21 and the outer scissor blade 11 are in an open state, and the inner tube scissors 2 and the outer tube scissors 1 move forward synchronously to approach the tissue to be sheared. When the movable pin 3 slides in the inner inclined long groove 22 and the outer inclined long groove 12, the inner tube scissors 2 and the outer tube scissors 1 rotate relative to each other for shearing.

[0047] Furthermore, with regard to the shapes of the fixed handle 4 and the movable handle 5, the fixed handle 4 is a rod-shaped structure, the two ends of the movable pin 3 are fixed on the fixed handle 4, and the fixed handle 4 is provided with a clearance hole for the outer tube shear 1 and the inner tube shear 2 to slide, and the movable handle 5 is a tubular structure, provided with a structural hole for the installation of the fixed handle 4, and the movable handle 5 is slidably sleeved on the outside of the fixed handle 4, and the movable handle 5 slides and rotates axially relative to the fixed handle 4.

[0048] Furthermore, in order to facilitate the assembly of the fixed handle 4 and the movable handle 5, the fixed handle 4 and the movable handle 5 are designed to be assembled in a manner of splicing two halves.

[0049] Furthermore, in order to make the outer scissor blade 11 and the inner scissor blade 21 in the open state when the human hand is not operating, a spring 6 is further included. The spring 6 is arranged between the fixed handle 4 and the movable handle 5. The spring 6 makes the movable handle 5 and the fixed handle 4 in the limit state without external force. At this time, the outer scissor blade 11 and the inner scissor blade 21 are in the open state, as shown in the appendix of the manual. Figure 5 and attached Figure 6 Status shown.

[0050] In addition, if a movable pin 3 is included, an arc-shaped groove with a vertical axis can also be provided on the outer tube shear 1. In this case, the movable pin 3 is fixed to the proximal tube wall of the inner tube shear 2, and the movable pin 3 is slidably set in the arc-shaped groove. By rotating the outer tube shear 1, the outer scissor blade 11 can be rotated relative to the inner scissor blade 21, thereby realizing the shearing action.

[0051] In addition, the structure of the inner tube shear 2 can be a solid rod or a tubular structure with holes.

[0052] If the inner tube shear 2 is a tubular structure, please refer to Figure 9 As shown, other instruments 7 can be inserted into the inner hole of the inner tube shears 2 to enter the human tissue, such as Figure 10 shown.

[0053] Furthermore, the side of the inner scissor blade 21 facing away from the outer scissor blade 11 is an arc-shaped surface that does not exceed the inner hole wall of the inner tube shear 2. In this way, the ring shear instrument of the present application also has its own channel, and laparoscopic instruments can be used for surgery through its channel, so it does not occupy the channel opening. When shearing is required, the other instruments 7 do not need to be withdrawn to complete the shearing action, and it is basically suitable for all laparoscopic instruments, effectively improving surgical efficiency. Therefore, the ring shear instrument of the present application is suitable for shearing tissue in conjunction with laparoscopic instruments or for shearing tissue alone.

[0054] In summary, the minimally invasive channel ring shearing instrument provided by the present invention has the following advantages:

[0055] 1. The relative rotation of the tubular outer shears 1 and the tubular or rod-shaped inner shears 2 realizes the rotary ring shearing action, thereby enabling the shearing of human tissue within the width range of the outer shears 1, making the channel hole opened in the human body as small as possible and the space required for the shearing action as small as possible, thereby improving the success rate of the operation;

[0056] 2. Through the movable pin 3 and the outer inclined long slot 12 and outer straight long slot 13 on the outer tube shear 1, and / or the movable pin 3 and the inner inclined long slot 22 and inner straight long slot 23 on the inner tube shear 2, the outer tube shear 1 can be precisely controlled in its opening and shearing states relative to the inner tube shear 2.

[0057] 3. The cooperation between the fixed handle 4, the movable handle 5 and the spring 6 makes it easier for people to operate the device;

[0058] 4. Through the tubular inner tube shears 2, other laparoscopic instruments can enter the human body through the inner hole of the inner tube shears 2, so that the ring shears instrument of the present application can serve as a channel for other laparoscopic instruments to enter the human body, and can also cooperate with other laparoscopic instruments to perform surgical operations.

[0059] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A minimally invasive channel ring shearing instrument, characterized in that: The invention comprises an outer tube shear (1) and an inner tube shear (2), wherein the outer tube shear (1) is a tubular structure, and the inner tube shear (2) is rotatably arranged in the inner hole of the outer tube shear (1). The distal end of the outer tube shear (1) is provided with an outer shear blade (11), and the distal end of the inner tube shear (2) is provided with an inner shear blade (21). When the outer tube shear (1) and the inner tube shear (2) rotate coaxially, the outer shear blade (11) and the inner shear blade (21) perform a shearing action.

2. The minimally invasive channel ring shearing instrument according to claim 1, characterized in that: The outer shape of the outer scissor blade (11) is rectangular, trapezoidal or triangular, and the outer shape of the inner scissor blade (21) is rectangular, trapezoidal or triangular.

3. The minimally invasive channel ring shearing instrument according to claim 1, characterized in that: It also includes a movable pin (3), an outer inclined long groove (12) is provided on the proximal tube wall of the outer tube shear (1), and the movable pin (3) is slidably arranged in the outer inclined long groove (12).

4. The minimally invasive channel ring shearing instrument according to claim 3, characterized in that: It also includes a fixed handle (4) and a movable handle (5), wherein the movable handle (5) rotates and slides relative to the fixed handle (4), the fixed handle (4) is fixedly connected to the movable pin (3), and the movable handle (5) is fixedly connected to the proximal end of the outer tube shears (1).

5. The minimally invasive channel ring shearing instrument according to claim 4, characterized in that: The fixed handle (4) is a rod-shaped structure, the movable handle (5) is a tubular structure, the movable handle (5) is slidably sleeved on the outside of the fixed handle (4), and further comprises a spring (6), wherein the spring (6) is arranged between the fixed handle (4) and the movable handle (5).

6. The minimally invasive channel ring shearing instrument according to claim 3, characterized in that: The inner tube shear (2) is provided with a protrusion or flange for preventing axial sliding relative to the outer tube shear (1).

7. The minimally invasive channel ring shearing instrument according to claim 3, characterized in that: An inner inclined long groove (22) is provided on the proximal tube wall of the inner tube shear (2), and the inner inclined long groove (22) and the outer inclined long groove (12) are arranged symmetrically relative to the horizontal central axis of the outer tube shear (1), and the movable pin (3) is slidably arranged in the inner inclined long groove (22).

8. The minimally invasive channel ring shearing instrument according to claim 7, characterized in that: An inner straight long groove (23) communicating with the distal end of the inner inclined long groove (22) is provided on the tube wall of the inner tube shear (2), and an outer straight long groove (13) communicating with the distal end of the outer inclined long groove (12) is provided on the tube wall of the outer tube shear (1).

9. The minimally invasive channel ring shearing instrument according to claim 3, characterized in that: The inner tube shear (2) is axially slidably arranged relative to the outer tube shear (1), and the movable pin (3) is fixed on the proximal tube wall of the inner tube shear (2).

10. The minimally invasive channel ring shearing instrument according to any one of claims 1 to 9, characterized in that: The inner tube shear (2) is a tubular structure.

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