Trocar assembly with cutting edge
By designing a trocar assembly with a blade, using a combination of oblique needle tip insertion and needle knife cutting, the cutting problem of needle cutting damage to surrounding tissues in the prior art during the loosening of subcutaneous tissue is solved, thus achieving a smaller amount of damage to the cutting of needles in the prior art. tissue damage and faster operation.
Patent Information
- Application Number
- CN202420883135.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-04-26
AI Technical Summary
Existing needles with blades can easily cause cutting damage to surrounding tissues during the loosening of subcutaneous tissue, resulting in bleeding and large wounds, making it difficult to heal.
Design a trocar assembly with a blade, including an external trocar and an internal needle knife. The trocar is inserted into the tissue with an oblique needle tip. After reaching the target position, the needle knife is activated for cutting to reduce damage to the surrounding tissue.
The inclined needle tip of the trocar is less harmful to the tissue during the insertion process. After reaching the target position, it cuts quickly and efficiently, reduces damage to the target area, improves operating efficiency and reduces the difficulty of wound healing.
Smart Images
Figure CN222323631U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments, and more specifically, to a trocar assembly with a blade. Background Art
[0002] At present, subcutaneous puncture has been widely used in clinical practice, especially in the field of subcutaneous nerve treatment. In the treatment of some neurological diseases, it is necessary to loosen the tissues around the nerves. In order to reduce the wound, the existing medical methods generally use a needle knife with a blade to insert into the subcutaneous tissue for loosening. However, if the needle knife is directly inserted into the subcutaneous tissue, the blade will continue to penetrate into the subcutaneous layer, which will cause the surrounding tissues to be cut within the range of the blade during the penetration process, resulting in more bleeding, and it is easy to cut small nerves during the insertion process. The wound is large and difficult to heal. Utility Model Content
[0003] The purpose of the utility model is to provide a trocar assembly with a blade, wherein the trocar body is first inserted into the tissue, and the damage to the surrounding tissue is small during the insertion process. The needle knife body is activated after reaching the target position, so that fast and efficient target cutting can be performed, the operation process can be accelerated, and the damage to the target part can be reduced.
[0004] The above technical purpose of the utility model is achieved through the following technical solutions: a trocar assembly with a blade, comprising an external trocar and an internal needle knife;
[0005] The external trocar includes a trocar body and a needle tube seat. The trocar body is a hollow needle tube. One end of the hollow needle tube is provided with an oblique needle tip. One end of the needle tube seat is fixedly connected to one end of the trocar body. A hollow needle tube through cavity is also provided in the needle tube seat at a position corresponding to the cavity of the trocar body.
[0006] The internal needle knife includes a needle knife body and a needle knife seat, one end of the needle knife body is provided with a blade, the other end of the needle knife body is fixedly connected to one end of the needle knife seat, the diameter of the needle knife body is smaller than the inner diameter of the cavity in the trocar body and the inner diameter of the needle tube cavity, when the needle knife body is completely inserted from the needle tube cavity, the blade will pass through the tail end of the cavity in the trocar body.
[0007] As a preferred technical solution of the present utility model, the needle tube seat includes a needle tube connecting seat and a needle tube hand-held seat. A through hole is provided in the needle tube connecting seat. One end of the trocar body is fixedly connected to the hole wall of the through hole. One end of the needle tube connecting seat is fixedly connected to one end of the needle tube hand-held seat, and the cavity in the trocar body is concentrically connected with the needle tube cavity inside the needle tube hand-held seat.
[0008] As a preferred technical solution of the utility model, the inner diameter of the needle tube through cavity at one end facing the trocar body is smaller than the inner diameter of the end facing away from the trocar body.
[0009] As a preferred technical solution of the utility model, raised placement rings with the same diameter are arranged on the edges of both ends of the side surface of the needle tube hand-held seat.
[0010] As a preferred technical solution of the utility model, the needle knife seat includes a circular cylindrical needle knife hand-held seat and a needle knife connecting seat, the needle knife connecting seat is provided with a connecting hole, one end of the needle knife hand-held seat is provided with a connecting groove, one end of the needle knife body passes through the connecting hole and is fixedly connected in the connecting groove, one end of the needle knife body is fixedly connected in the connecting hole, and one end of the needle knife connecting seat is fixedly connected to one end of the needle knife hand-held seat.
[0011] As a preferred technical solution of the utility model, one end of the needle knife hand-held seat facing away from the needle knife body is a plane.
[0012] As a preferred technical solution of the utility model, the outer sides of the needle knife hand-held seat and the needle tube hand-held seat are both provided with anti-slip grooves.
[0013] As a preferred technical solution of the utility model, the bottom end and the side end of the blade of the needle knife body are both provided with sharp edges.
[0014] As a preferred technical solution of the utility model, the outer sides of the needle knife body and the trocar body are both provided with scales, and the starting end of the scale is arranged at the position of the blade or the beveled needle tip.
[0015] As an optimal technical solution of the utility model, the external trocar and the internal needle knife also include a placement base, the placement base includes a counterweight base platform, a vertical support rod, and a suspended bracket, the bottom of the counterweight base platform is provided with a magnetic suction sheet, the top of the counterweight base platform is provided with a placement groove opening upward and matching the needle knife handheld seat, the bottom end of the vertical support rod is fixedly connected to the top table surface of the counterweight base platform, the top end of the vertical support rod is connected to the outer side of the suspended bracket on the side facing away from the counterweight base platform, the suspended bracket is a missing ring bracket, the notch of the missing ring bracket corresponds to the middle part of the needle tube handheld seat, the top surface of the missing ring bracket is provided with a card slot, and the card slot corresponds to the shape of the raised placement ring.
[0016] In summary, the utility model has the following beneficial effects: when the trocar assembly of the utility model needs to be used, first hold the needle tube seat, drive the trocar body to extend into the target tissue, stop after reaching the target part, then hold the needle knife seat, drive the needle knife body to insert into the needle tube cavity and the internal cavity of the trocar body, until it passes through the internal cavity of the trocar body, and then the target part can be cut by the end blade of the needle knife body. The whole operation process first inserts the trocar body into the tissue. Since the trocar body adopts an oblique needle tip, it is equivalent to squeezing into the tissue through the tip. The damage to the surrounding tissue during the insertion process is small. Compared with the direct use of the needle knife insertion, it can greatly reduce the damage to the tissue, which is not conducive to wound healing; the needle knife body is started after reaching the target position, and the target cutting can be carried out quickly and efficiently, which can speed up the operation process and reduce the damage to the target part. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model;
[0018] Figure 2 It is a schematic diagram of the needle tube through cavity and a schematic diagram of the needle knife hand-held seat of the utility model;
[0019] Figure 3 It is a schematic diagram of the blade in the utility model;
[0020] Figure 4 It is a schematic diagram of the placement base of the utility model;
[0021] Figure 5 It is a schematic diagram of a notch for placing a base of the utility model.
[0022] In the figure: 1. cannula needle body; 2. oblique needle tip; 3. needle tube cavity; 4. cavity; 5. needle knife body; 6. blade; 7. needle tube connecting seat; 8. needle tube holding seat; 9. raised placement ring; 10. needle knife holding seat; 11. needle knife connecting seat; 12. configuration base; 13. vertical support rod; 14. suspended bracket; 15. magnetic suction sheet; 16. placement slot; 17. notch; 18. card slot. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0024] like Figure 1-5 As shown, the utility model provides a trocar assembly with a blade 6, comprising an external trocar and an internal needle knife;
[0025] The external trocar includes a trocar body 1 and a needle tube seat. The trocar body 1 is a hollow needle tube, one end of which is provided with an oblique needle tip 2. One end of the needle tube seat is fixedly connected to one end of the trocar body 1, and a hollow needle tube through cavity 3 is also arranged in the needle tube seat at a position corresponding to the cavity 4 of the trocar body 1.
[0026] The internal needle knife includes a needle knife body 5 and a needle knife seat. A blade 6 is provided at one end of the needle knife body 5, and the other end of the needle knife body 5 is fixedly connected to one end of the needle knife seat. The diameter of the needle knife body 5 is smaller than the inner diameter of the cavity 4 in the trocar body 1 and the inner diameter of the needle tube cavity 3. When the needle knife body 5 is completely inserted from the needle tube cavity 3, the blade 6 will pass through the tail end of the cavity 4 in the trocar body 1, that is, the length of the needle knife body 5 is greater than the length of the trocar body 1, so that the blade 6 can be passed through to operate on the target tissue in actual use.
[0027] The working principle and use process of the trocar assembly with blade 6 of the utility model are as follows: when the trocar assembly of the utility model needs to be used, the needle tube seat is first held to drive the trocar body 1 to extend into the target tissue, and the needle knife seat is stopped after reaching the target part, and then the needle knife seat is held to drive the needle knife body 5 to insert into the needle tube cavity 3 and the internal cavity 4 of the trocar body 1, until it passes through the internal cavity 4 in the trocar body 1, and then the target part can be cut by the end blade 6 of the needle knife body 5. The whole operation process first inserts the trocar body 1 into the tissue. Since the trocar body 1 adopts an oblique needle tip 2, it is equivalent to squeezing into the inside of the tissue through the tip. The damage to the surrounding tissue during the insertion process is small. Compared with the direct use of the needle knife insertion, the damage to the tissue can be greatly reduced, which is not conducive to wound healing; the needle knife body 5 is started after reaching the target position, and the target cutting can be carried out quickly and efficiently, which can speed up the operation process and reduce the damage to the target part.
[0028] As an embodiment of the present utility model, Figure 2 As shown, the needle tube seat includes a needle tube connection seat 7 and a needle tube hand-held seat 8. A perforation is provided in the needle tube connection seat 7. One end of the trocar body 1 is fixedly connected to the hole wall of the perforation. One end of the needle tube connection seat 7 is fixedly connected to one end of the needle tube hand-held seat 8, and the cavity 4 in the trocar body 1 is concentrically connected with the needle tube through cavity 3 inside the needle tube hand-held seat 8. The inner diameter of the needle tube through cavity 3 facing the trocar body 1 is smaller than the inner diameter of the end facing away from the trocar body 1, so that the needle knife body 5 can quickly find the position of the needle tube through cavity 3 and insert the needle knife body 5 to improve efficiency. The two end edges of the side of the needle tube hand-held seat 8 are provided with raised placement rings 9 of the same diameter. The two raised placement rings 9 can protrude from the side of the needle tube hand-held seat 8. When placed after use, the needle tube hand-held seat 8 can be placed flat so that the trocar body 1 can be kept away from the placement table, reducing the possibility of contaminating the trocar body 1.
[0029] As an embodiment of the present utility model, Figure 2 As shown, the needle knife seat includes a circular cylindrical needle knife hand-held seat 10 and a needle knife connecting seat 11, the needle knife connecting seat 11 is provided with a connecting hole, one end of the needle knife hand-held seat 10 is provided with a connecting groove, one end of the needle knife body 5 passes through the connecting hole and is fixedly connected in the connecting groove, one end of the needle knife body 5 is fixedly connected in the connecting hole, and one end of the needle knife connecting seat 11 is fixedly connected to one end of the needle knife hand-held seat 10. The end of the needle knife hand-held seat 10 facing away from the needle knife body 5 is a plane, which is convenient for placing the entire internal needle knife with the plane needle knife hand-held seat 10 to avoid contaminating the needle knife body 5.
[0030] Furthermore, the outer sides of the needle knife hand-held seat 10 and the needle tube hand-held seat 8 are provided with anti-slip grooves, which facilitate medical staff to hold the hands more stably and reduce the possibility of hand slippage.
[0031] Further, such as Figure 3 As shown, the bottom and side ends of the blade 6 of the needle knife body 5 are provided with sharp edges, that is, the side surface of the end of the needle knife body 5 can also be cut, which is convenient for multi-angle operation in actual use.
[0032] As an embodiment of the utility model, a scale is provided on the outside of the needle knife body 5 and the trocar body 1, and the starting end of the scale is set at the position of the blade 6 or the beveled needle tip 2, which is convenient for understanding the insertion depth of the trocar body 1 and the needle knife body 5 during actual operation.
[0033] As an embodiment of the present utility model, Figure 4 and 5As shown, the external trocar and the internal needle knife also include a placement base, which includes a counterweight base platform, a vertical support rod 13, and a suspended bracket 14. A magnetic suction sheet 15 is provided at the bottom of the counterweight base platform, and a placement groove 16 with an opening upward and matching the needle knife hand-held seat 10 is provided at the top of the counterweight base platform. The bottom end of the vertical support rod 13 is fixedly connected to the top table surface of the counterweight base platform, and the top end of the vertical support rod 13 is connected to the outer side of the suspended bracket 14 on the side facing away from the counterweight base platform. The suspended bracket 14 is a missing ring bracket, and the notch 17 of the missing ring bracket corresponds to the middle part of the needle tube hand-held seat 8. The top surface of the missing ring bracket is provided with a card groove 18, and the card groove 18 corresponds to the shape of the raised placement ring 9.
[0034] Since the trocar assembly of the utility model is not a disposable item, it can be used repeatedly for one patient in the same period of time and can act on multiple patient parts. Therefore, after one use, it is necessary to properly place the trocar assembly to avoid contact with a sterile environment. Therefore, the utility model also designs a special placement base for the trocar assembly. After the internal needle knife is used, the flat end of the needle knife hand-held seat 10 can be directly inserted into the placement groove 16. Through the limiting effect of the placement groove 16, the needle knife body 5 can be stably placed on the counterweight base. After the external trocar is used, the middle section of the needle tube hand-held seat 8 can be inserted into the notch 17 of the missing annular bracket, and the raised placement ring 9 can be stuck on the top of the missing annular bracket to achieve the placement of the external needle tube. The overall counterweight base has a certain weight and is not easy to tip over. In addition, a magnetic suction sheet 15 is provided at the bottom thereof, so that the iron plate for placing the utensil can be adsorbed, and the stability is higher, so that the parts that directly contact the patient are suspended to avoid contamination caused by contact with other objects, thereby achieving repeated use of the trocar assembly in the same stage of a patient.
[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A trocar assembly with a blade (6), characterized in that: Includes external trocar and internal needle knife; The external trocar comprises a trocar body (1) and a needle tube seat, wherein the trocar body (1) is a hollow needle tube, one end of which is provided with an oblique needle tip (2), one end of the needle tube seat is fixedly connected to one end of the trocar body (1), and a hollow needle tube through cavity (3) is also arranged in the needle tube seat at a position corresponding to the cavity (4) of the trocar body (1); The internal needle knife comprises a needle knife body (5) and a needle knife seat, one end of the needle knife body (5) is provided with a blade (6), the other end of the needle knife body (5) is fixedly connected to one end of the needle knife seat, the diameter of the needle knife body (5) is smaller than the inner diameter of the cavity (4) in the trocar body (1) and the inner diameter of the needle tube cavity (3), and when the needle knife body (5) is completely inserted from the needle tube cavity (3), the blade (6) will pass through the rear end of the cavity (4) in the trocar body (1).
2. A trocar assembly with a blade (6) according to claim 1, characterized in that: The needle tube seat comprises a needle tube connecting seat (7) and a needle tube hand-held seat (8). A through hole is provided in the needle tube connecting seat (7). One end of the trocar body (1) is fixedly connected to the hole wall of the through hole. One end of the needle tube connecting seat (7) is fixedly connected to one end of the needle tube hand-held seat (8), so that the cavity (4) in the trocar body (1) is concentrically connected with the needle tube through cavity (3) inside the needle tube hand-held seat (8).
3. A trocar assembly with a blade (6) according to claim 2, characterized in that: The inner diameter of the needle tube through cavity (3) at one end facing the trocar body (1) is smaller than the inner diameter of the end facing away from the trocar body (1).
4. A trocar assembly with a blade (6) according to claim 3, characterized in that: The two end edges of the side surface of the needle tube hand-held seat (8) are provided with raised placement rings (9) of the same diameter.
5. A trocar assembly with a blade (6) according to claim 4, characterized in that: The needle knife seat comprises a circular cylindrical needle knife hand-held seat (10) and a needle knife connecting seat (11), wherein the needle knife connecting seat (11) is provided with a connecting hole, and one end of the needle knife hand-held seat (10) is provided with a connecting groove, and one end of the needle knife body (5) passes through the connecting hole and is fixedly connected in the connecting groove, and one end of the needle knife body (5) is fixedly connected in the connecting hole, and one end of the needle knife connecting seat (11) is fixedly connected to one end of the needle knife hand-held seat (10).
6. A trocar assembly with a blade (6) according to claim 5, characterized in that: One end of the needle knife hand-held seat (10) facing away from the needle knife body (5) is a flat surface.
7. A trocar assembly with a blade (6) according to claim 6, characterized in that: The outer sides of the needle knife hand-held seat (10) and the needle tube hand-held seat (8) are both provided with anti-slip grooves.
8. A trocar assembly with a blade (6) according to claim 7, characterized in that: The bottom end and the side end of the blade (6) of the needle knife body (5) are both provided with sharp edges.
9. A trocar assembly with a blade (6) according to claim 8, characterized in that: The outer sides of the needle knife body (5) and the trocar body (1) are both provided with scales, and the starting end of the scale is arranged at the position of the blade (6) or the beveled needle tip (2).
10. A trocar assembly with a blade (6) according to claim 9, characterized in that: The external trocar and the internal needle knife also include a placement base, the placement base includes a counterweight base platform, a vertical support rod (13), and a suspended bracket (14); a magnetic suction sheet (15) is provided at the bottom of the counterweight base platform; a placement groove (16) opening upward and matching the needle knife hand-held seat (10) is provided at the top of the counterweight base platform; the bottom end of the vertical support rod (13) is fixedly connected to the top table surface of the counterweight base platform; the top end of the vertical support rod (13) is connected to the outer side of the suspended bracket (14) on the side facing away from the counterweight base platform; the suspended bracket (14) is a missing ring bracket; the notch (17) of the missing ring bracket corresponds to the middle part of the needle tube hand-held seat (8); the top surface of the missing ring bracket is provided with a card slot (18); the card slot (18) corresponds in shape to the raised placement ring (9).