Variable-diameter puncture outfit

Abstract

The utility model discloses a variable-diameter puncture outfit which comprises a puncture needle, a puncture cannula assembly and a variable-diameter assembly arranged on the periphery of the puncture cannula assembly. The variable-diameter assembly comprises a first shell, a second shell, a rigid variable-diameter component arranged in the first shell and the second shell in a penetrating manner, and an elastic film; a spring fixing column and a spring sleeving the spring fixing column are arranged at the bottom of the first shell, and a guide groove matched with the rigid reducing component is formed in the bottom of the first shell; a spring hole corresponding to the spring fixing column is formed in the bottom of the second shell, and a driving groove for driving the rigid reducing component to move is formed in the side wall of the second shell; the upper part of the rigid variable-diameter component is mounted in the guide groove and the driving groove, and the lower part of the rigid variable-diameter component is wrapped in the elastic film; the bottom of the first shell and the bottom of the second shell are provided with cannula channels allowing the puncture cannula assembly to penetrate through, the diameter of the cannula of the variable-diameter puncture outfit can be changed, and the same variable-diameter puncture outfit can be used for establishing operation channels of different sizes.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, and in particular relates to a variable-diameter puncture device. Background Art

[0002] Minimally invasive surgery, as the name implies, is a surgery with minimal trauma. It refers to a new technology that uses modern medical devices such as laparoscopes and thoracoscopes and related equipment to perform surgery in the human body. Minimally invasive surgery has the advantages of less trauma, less pain, and faster recovery. Minimally invasive surgery represented by laparoscopes has developed rapidly in recent years, and its number of surgeries has exceeded that of traditional surgeries in developed countries.

[0003] A cannula puncture device (abbreviated as puncture device) is a surgical instrument used to establish surgical channels and observation channels during laparoscopic surgery. When performing laparoscopic surgery, it may be necessary to establish surgical channels of different sizes, and sometimes the size of the channel may need to be changed during the same operation. The current method uses a fixed size cannula for the puncture device. In order to establish surgical channels of different sizes, multiple puncture devices of different specifications are generally used for replacement during surgery, which not only makes the surgical process more complicated, but also has an adverse effect on the patient's recovery in the later stage. Utility Model Content

[0004] The utility model provides a variable diameter puncture device, the sleeve diameter of which can be changed, and the same variable diameter puncture device can be used to establish surgical channels of different sizes.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A variable diameter puncture device, comprising a puncture needle, a puncture sleeve assembly and a variable diameter assembly arranged on the periphery of the puncture sleeve assembly;

[0007] The diameter-changing assembly comprises a cylindrical first shell, a cylindrical second shell arranged in the first shell, and a plurality of rigid diameter-changing members and elastic films passing through the first shell and the second shell;

[0008] The bottom of the first housing is provided with a spring fixing column and a spring sleeved on the spring fixing column, and a guide groove extending along the radial direction and cooperating with the rigid diameter-changing member is provided at the bottom;

[0009] The bottom of the second housing is provided with a spring hole corresponding to the spring fixing column, and the side wall is provided with a driving groove for driving the rigid diameter-changing member to move radially;

[0010] The upper part of the rigid variable diameter member is installed in the guide groove and the driving groove, and the lower part is wrapped in the elastic film;

[0011] The bottoms of the first shell and the second shell are provided with a sleeve channel through which the puncture sleeve assembly can pass.

[0012] In the utility model, the second shell can move up and down a certain distance in the first shell, and then the driving groove can drive the radial movement of the rigid variable diameter component, so as to achieve the adjustment of the size of the lower channel.

[0013] Preferably, the driving groove passes through the side wall of the first housing, and the top of the driving groove is an obliquely arranged driving groove;

[0014] The top of the rigid diameter-changing member is an obliquely arranged driving protrusion, and the shape of the driving protrusion matches the shape of the driving groove.

[0015] Preferably, a guide block cooperating with the guide groove is provided in the middle of the rigid variable diameter member, and the guide block is a strip-shaped structure.

[0016] Preferably, a plurality of axial guide rails are provided on the inner wall of the first shell, and an axial guide groove matching with the guide rails is provided on the side wall of the second shell.

[0017] Preferably, a vent hole communicating with the sleeve channel is provided on the side wall of the first shell.

[0018] Preferably, the puncture sleeve assembly comprises a puncture sleeve, a sealing ring sequentially arranged at the upper end of the puncture sleeve, a second sealing cap, a gland, a rotating cover, a first sealing cap and a top cover;

[0019] The upper surface of the top cover is provided with a fixing groove, and the puncture needle is provided with a fixing convex piece matched with the fixing groove.

[0020] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0021] The diameter of the lower variable diameter component of the variable diameter puncture device of the utility model can be changed. During puncture, it is a 3mm puncture device, which causes little trauma and reduces tissue damage. Then, by moving the second shell up and down, the rigid variable diameter component can move radially to change the size of the lower channel, and can seamlessly switch between 3-5-12mm, thereby achieving the purpose of efficiently creating surgical channels of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the variable diameter puncture device of the utility model;

[0023] Figure 2 for Figure 1 A cross-sectional view of the variable diameter puncture device shown;

[0024] Figure 3 It is a structural schematic diagram of the puncture sleeve assembly in the variable diameter puncture device;

[0025] Figure 4 for Figure 3 An exploded view of the puncture cannula assembly is shown;

[0026] Figure 5 It is a schematic diagram of the structure of the first shell in the variable diameter puncture device;

[0027] Figure 6 It is a schematic diagram of the structure of the second shell in the variable diameter puncture device;

[0028] Figure 7 It is a structural schematic diagram of a rigid diameter-changing component in a variable-diameter puncture device;

[0029] Figure 8 It is a structural schematic diagram of the initial state of the variable diameter component in the variable diameter puncture device;

[0030] Fig. 9 is a cross-sectional view of the initial state of the variable diameter component in the variable diameter puncture device;

[0031] Fig.10 It is a schematic structural diagram of the variable diameter component in the variable diameter puncture device in an expanded state;

[0032] Fig.11 It is a cross-sectional view of the variable diameter assembly in the variable diameter puncture device in the expanded state; in the figure, 1. puncture needle, 2. top cover, 3. first sealing cap, 4. rotating cover, 5. pressure cover, 6. second sealing cap, 7. puncture sleeve, 8. sealing ring, 9. elastic film, 10. first shell, 11. second shell, 12. rigid variable diameter member, 13. spring, 14. axial guide rail, 15. spring fixing column, 16. guide groove, 17. spring hole, 18. drive groove, 18a. drive groove, 19. axial guide groove, 20. drive protrusion, 21. guide block. DETAILED DESCRIPTION

[0033] The variable diameter puncture device of the present invention is further described below in conjunction with the accompanying drawings.

[0034] Figure 1 and Figure 2 They are respectively a schematic diagram and a cross-sectional view of the structure of the variable diameter puncture device of the utility model, Figure 1 It can be seen that the variable diameter puncture device of the present invention mainly comprises a puncture needle 1, a puncture sleeve assembly and a variable diameter assembly arranged on the periphery of the puncture sleeve assembly.

[0035] Figure 3 and Figure 4 The schematic diagram and exploded diagram of the puncture cannula assembly in the variable diameter puncture device are respectively Figure 3 and Figure 4 It can be seen that the puncture sleeve assembly includes a puncture sleeve 7, a sealing ring 8 arranged in sequence at the upper end of the puncture sleeve 7, a second sealing cap 6, a pressure cover 5, a rotating cover 4, a first sealing cap 3 and a top cover 2;

[0036] The upper surface of the top cover 2 is provided with a fixing groove, and the puncture needle 1 is provided with a fixing convex piece matched with the fixing groove, and the puncture needle 1 can be fixed to the puncture sleeve assembly through the fixing convex piece and the fixing groove.

[0037] Figures 5 to 7 It is a schematic diagram of the structure of the components in the reducer assembly. Figure 8 and Fig. 9 is the structural schematic diagram and cross-sectional view of the reducer assembly in its initial state. Figures 5 to 9 It can be seen that the diameter-changing assembly includes a cylindrical first shell 10, a cylindrical second shell 11 arranged in the first shell 10, a plurality of rigid diameter-changing members 12 and an elastic film 9 inserted in the first shell 10 and the second shell 11, and further, there are three diameter-changing rigid diameter-changing members 12;

[0038] The bottom of the first housing 10 is provided with a spring fixing column and a spring 13 sleeved on the spring fixing column, and a guide groove extending along the radial direction to cooperate with the rigid diameter-changing member 12 is opened at the bottom;

[0039] The bottom of the second housing 11 is provided with a spring hole corresponding to the spring fixing column, and the side wall is provided with a driving groove for driving the rigid diameter-changing member 12 to move radially;

[0040] The upper part of the rigid variable diameter member 12 is installed in the guide groove and the driving groove, and the lower part is wrapped in the elastic film 9;

[0041] The bottoms of the first housing 10 and the second housing 11 are provided with cannula channels through which the puncture cannula assembly can pass.

[0042] In the present invention, the second housing 11 can move up and down a certain distance in the first housing 10, and then the driving groove can drive the radial movement of the rigid variable diameter member 12, thereby realizing the adjustment of the size of the lower channel.

[0043] Specifically, the driving groove passes through the side wall of the first housing 10, and the top of the driving groove is an obliquely arranged driving groove, and the height of the inner side of the driving groove is lower than the height of the outer side;

[0044] The top of the rigid variable diameter member 12 is an obliquely arranged driving protrusion, and the shape of the driving protrusion matches the shape of the driving groove.

[0045] Specifically, a guide block that cooperates with the guide groove is provided in the middle of the rigid variable diameter member 12, and the guide block is a strip-shaped structure.

[0046] Specifically, a plurality of axial guide rails are disposed on the inner wall of the first shell 10 , and axial guide grooves matching with the guide rails are opened on the side wall of the second shell 11 .

[0047] Preferably, a vent hole communicating with the sleeve channel is provided on the side wall of the first shell 10 .

[0048] Fig.10 and 11 The following are the structural schematic diagram and cross-sectional view of the variable diameter component in the variable diameter puncture device in the expanded state, combined with Figures 9-11 It can be seen that when the variable diameter assembly is in the initial state, the spring is in an extended state, and the distance between the bottom of the second shell 11 and the bottom of the first shell is the largest. At this time, the driving protrusion at the top of the rigid variable diameter member is located on the inner side of the driving groove, and the distance between several rigid variable diameter members is the shortest; when the variable diameter assembly is in the expanded state, the spring is in a compressed state, and the distance between the bottom of the second shell 11 and the bottom of the first shell becomes smaller. At this time, the driving protrusion at the top of the rigid variable diameter member slides to the outside of the driving groove, which drives the rigid variable diameter member to move outward as a whole. The distance between several rigid variable diameter members is the shortest, driving the elastic film 9 to expand, and a larger puncture cannula can be used to achieve variable diameter operation.

[0049] The specific implementation methods described above provide a detailed description of the technical solutions and beneficial effects of the utility model. It should be understood that the above is only the most preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, supplements and equivalent substitutions made within the scope of the principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A variable diameter trocar, characterized in that: It comprises a puncture needle (1), a puncture sleeve assembly and a diameter-changing assembly arranged on the periphery of the puncture sleeve assembly; The diameter-changing assembly comprises a cylindrical first shell (10), a cylindrical second shell (11) arranged in the first shell (10), a plurality of rigid diameter-changing components (12) and an elastic film (9) inserted in the first shell (10) and the second shell (11); The bottom of the first housing (10) is provided with a spring fixing column (15) and a spring (13) sleeved on the spring fixing column (15), and a guide groove (16) extending along the radial direction and cooperating with the rigid diameter-changing member (12) is provided at the bottom; The bottom of the second housing (11) is provided with a spring hole (17) corresponding to the spring fixing column (15), and the side wall is provided with a driving groove (18) for driving the rigid diameter-changing member (12) to move radially; The upper portion of the rigid variable diameter member (12) is installed in the guide groove (16) and the driving groove (18), and the lower portion is wrapped in the elastic film (9); The bottoms of the first housing (10) and the second housing (11) are provided with sleeve passages through which the puncture sleeve assembly can pass.

2. The variable diameter trocar according to claim 1, characterized in that: The driving groove (18) passes through the side wall of the first housing (10), and the top of the driving groove (18) is a driving groove (18a) arranged obliquely; The top of the rigid diameter-changing component (12) is a driving protrusion (20) arranged obliquely, and the shape of the driving protrusion (20) matches the shape of the driving groove (18a).

3. The variable diameter trocar according to claim 1, characterized in that: A guide block (21) that cooperates with the guide groove (16) is provided in the middle of the rigid diameter-changing component (12); the guide block (21) is a strip-shaped structure.

4. The variable diameter trocar according to claim 1, characterized in that: A plurality of axial guide rails (14) are provided on the inner wall of the first shell (10), and an axial guide groove (19) matching with the guide rails is provided on the side wall of the second shell (11).

5. The variable diameter trocar according to claim 1, characterized in that: A vent hole communicating with the sleeve channel is provided on the side wall of the first shell (10).

6. The variable diameter trocar according to claim 1, characterized in that: The puncture sleeve assembly comprises a puncture sleeve (7), a sealing ring (8) arranged in sequence at the upper end of the puncture sleeve (7), a second sealing cap (6), a gland (5), a rotating cover (4), a first sealing cap (3) and a top cover (2); The upper surface of the top cover (2) is provided with a fixing groove, and the puncture needle (1) is provided with a fixing protrusion matched with the fixing groove.

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