Deep knotter for fistula resection operation

Abstract

The utility model relates to the field of medical surgical instruments, in particular to a deep knotter for fistula resection surgery. The utility model aims to solve the problems that the conventional equipment cannot knot more knots, is easy to injure accidentally, is not firm in binding and the like. Comprising a shell, a transmission part, a knotting driving part and a sliding part. The shell sleeves the fistula, a knotting driving part is arranged on the outer wall, a sliding groove and a transmission cavity are formed in the side wall, a sliding part is arranged in the sliding groove, and a transmission part is arranged in the transmission cavity and connected with the sliding part. The shell is composed of a cylinder, a semispherical buffer piece and a through channel. The sliding part is composed of a connecting block, a limiting block and a fixing block. The knotting driving part drives the transmission part to drive the sliding part to move so as to control the suture line. The anti-knotting device has the advantages that the anti-knotting device is sleeved on the fistula to be tightly connected, and the anti-knotting position is not accurate; the semispherical buffer piece prevents accidental injury of tissues and reduces the winding risk of suture lines; operation is easy, the working efficiency of medical workers is improved, and practicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical surgical instruments, specifically to a deep knotting device for fistula excision surgery. Background Technology

[0002] A fistula is an abnormal passageway that can be caused by a variety of factors, including congenital developmental abnormalities, infection, trauma, and postoperative complications. Surgery is a common treatment method for fistulas. One of the key steps in surgery is to manage the fistula, such as ligating it to prevent it from reforming into an abnormal passageway.

[0003] However, for deep fistulas, the location is more complex than other tissues and blood vessels, and the surrounding tissue structure is more intricate, limiting the operating space and making it difficult for surgical instruments to reach and operate accurately. Furthermore, traditional ligation instruments are usually of limited length and cannot penetrate deep into the fistula. Moreover, it is difficult for surgeons to accurately wrap sutures around the fistula and tie an effective knot.

[0004] Important blood vessels, nerves, and other tissues and organs may exist around the fistula. Traditional deep knot tying devices, such as the one published in CN2260579Y, have relatively sharp knotting heads. The limited space in deep tissues and poor field of vision during operation make it easy to accidentally damage these structures during ligation, leading to serious complications such as bleeding and sensory or motor disorders caused by nerve damage. Furthermore, most knot tying devices are single-use devices, which are impractical for surgeries requiring multiple knotting operations. The sutures may not be able to fit tightly against the fistula, resulting in insecure ligation. This can lead to fistula reopening after surgery, causing disease recurrence and requiring further surgery, increasing patient suffering and medical costs. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of existing equipment being unable to tie multiple surgical knots at the same time, having a sharp structure that is prone to accidental injury, and being unable to fit tightly into the fistula.

[0006] To achieve the above objectives, the technical approach adopted by this utility model to solve its technical problem is as follows:

[0007] The specific design concept for a deep knot-tying device in fistula resection surgery is as follows: A hollow cylindrical shell is designed with a hemispherical bottom to avoid accidental damage to other tissues when inserted into the fistula. The shell can be fitted onto the outside of the fistula to ensure stable contact. It has a certain length, allowing one end of the shell to be pushed into the knot-tying area during surgery. A tensioning section is provided on the outside of the shell, with a connecting block fixedly connected thereto. A suture is wound into a loop and fitted onto the outside of the shell, with both ends of the suture positioned on the outside of the tissue. The connecting block can hook the looped suture. The transmission section can repeatedly extend and retract the connecting block, simultaneously pulling the looped suture on the outer surface of the shell from one end to the other. When all the knots are at the knot-tying point, the two ends of the suture are pulled to tighten and complete the knot.

[0008] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0009] Design a deep knot-tying device for fistula excision surgery. The specific design is as follows:

[0010] A deep knotting device for fistula resection surgery includes a housing, characterized in that the housing is sleeved on the outside of the fistula; a knotting driving part is provided on the outer wall of the housing, and a sliding groove and a transmission cavity are sequentially opened from the outside to the inside of the side wall of the housing; a sliding part is provided in the sliding groove, and a transmission part is provided in the transmission cavity, and the transmission part is connected to the sliding part; the knotting driving part drives the transmission part to extend or shorten, thereby causing the sliding part to move up and down; the sliding part controls the movement of the suture.

[0011] Furthermore, the sutures are wrapped around the outside of the shell.

[0012] Furthermore, the housing includes a column, a buffer member disposed at the lower end of the column, and a through channel disposed inside the housing.

[0013] Furthermore, the buffer element is hemispherical.

[0014] Furthermore, the sliding part consists of a connecting block, a limiting block disposed at the front end of the connecting block, and a fixing block disposed at the rear end of the connecting block.

[0015] Furthermore, the limiting block protrudes from the outer surface of the shell and abuts against the stitching line.

[0016] The beneficial effects of this utility model are:

[0017] 1. This utility model adopts a method of directly fitting the device onto the fistula, which makes the connection between the fistula and the device tight. In specific surgery, it can prevent the problem of inaccurate knotting position due to unclear vision, thus improving stability.

[0018] 2. The bottom of this utility model is provided with a hemispherical buffer, which can effectively prevent the device from accidentally injuring other tissues and reduce the risk of sutures getting tangled on the device and unable to come off.

[0019] 3. This utility model uses a stretching part and a suture line to work together, which makes the operation simple and the whole knotting process more convenient, thus improving the work efficiency of medical staff. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present invention;

[0021] Figure 2 This is a frontal cross-sectional view of the present invention.

[0022] Figure 3 for Figure 2 Enlarged view of section B;

[0023] Figure 4 for Figure 2 Enlarged view of section A;

[0024] Figure 5 This is a top sectional view of the structure of this utility model;

[0025] Figure 6 for Figure 5 Enlarged view of section C;

[0026] Figure 7 This is a diagram showing the usage state of this utility model;

[0027] Figure 8 This is a commonly used surgical knot tying method;

[0028] The above figures include the following reference numerals:

[0029] 10. Shell; 11. Column; 110. Sliding groove; 111. Transmission cavity; 12. Buffer; 13. Through channel; 50. Knotting drive unit; 211. Bearing; 212. Motor; 20. Transmission unit; 22. Connecting rope; 23. Spring; 24. Rotating shaft; 30. Sliding part; 31. Connecting block; 32. Limiting block; 33. Fixing block; 40. Sewing thread. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0031] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] refer to Figure 1-8 This utility model provides a deep knotting device for fistula resection surgery, including a housing 10, a transmission part 20, a knotting drive part 50, and a sliding part 30. The housing 10 is sleeved on the outside of the fistula; the knotting drive part 50 is provided on the outer wall of the housing 10, and the side wall of the housing 10 has a through sliding groove 110 and a transmission cavity 111 sequentially formed from the outside to the inside; the sliding part 30 is provided in the sliding groove 110, and the transmission part 20 is provided in the transmission cavity 111, and the transmission part 20 is connected to the sliding part 30; the knotting drive part 50 drives the transmission part 20 to extend or shorten, thereby causing the sliding part 30 to move up and down; the sliding part 30 controls the movement of the suture 40.

[0033] In practice, the shell 10 is made of medical-grade stainless steel or high-polymer medical plastic, with a smooth surface to reduce friction and damage to tissues. It has a diameter of approximately 1.5 cm and a length of approximately 15 cm. The upper cylindrical part 11 and the lower hemispherical buffer part 12 are integrally formed, with smooth surface lines. The shell 10 has an internal through channel 13 with a diameter of approximately 8 mm and a smooth surface. Two sliding grooves 110, slightly shorter than the length of the cylindrical part 11, are formed along the length of the shell 10 surface. The opening diameter of the sliding groove 110 is smaller than its internal diameter. A transmission cavity 111 is provided through the rear end of the sliding groove 110. The diameter of the channel between the transmission cavity 111 and the sliding groove 110 is smaller than the internal diameter of the sliding groove 110, ensuring the stability of the sliding part 30 and preventing shaking that could affect the surgical outcome.

[0034] In specific implementation, the sliding part 30 is integrally formed by a connecting block 31, a limiting block 32, and a fixing block 33. The connecting block 31 has a cone-shaped limiting block 32 at its front end and a fixing block 33 at its rear end. The connecting block 31 is slidably disposed within the sliding groove 110 and fits tightly therewith. The fixing block 33 is disposed within the transmission cavity 111. The limiting block 32 is cone-shaped and fits tightly with the opening of the sliding groove 110, protruding from the surface of the housing 10, for pushing the suture 40. The cone-shaped limiting block 32 can better push the suture 40, and due to its small size and smooth surface, it is less likely to damage the tissue.

[0035] In practical implementation, the knot-tying drive unit 50 is existing technology, located at the top of the sliding groove 110 and fixed to the housing 10. It is a miniature motor with a length of 23 mm and a diameter of 17 mm, characterized by its small size. It is equipped with a switch and a battery, allowing the doctor to control the device's operating status at any time during surgery. The knot-tying drive unit 50 includes a bearing 211 and a motor 212. The bearing 211 extends into the transmission cavity 111, and the motor 212 is located on the outside of the housing to provide power to the knot-tying drive unit 50.

[0036] In practice, the transmission unit 20 consists of a connecting rope 22, a spring 23, and a rotating shaft 24. The spring 23 is disposed within the sliding groove 110, and its length is slightly shorter than the sliding groove 110. One end is fixedly connected to the bottom end of the sliding groove 110, and the other end is fixedly connected to the bottom end of the connecting block 31. During operation, the spring 23 acts as a buffer and reset mechanism. When the knotting drive unit 50 winds the connecting rope 22, the spring 23 is compressed, providing power for the movement of the sliding part 30; when the knotting drive unit 50 releases the connecting rope 22, the spring 23 helps the sliding part 30 reset, preparing it for the next operation.

[0037] The rotating shaft 24 is located at the bottom of the transmission cavity 111, and the connecting rope 22 is wound around the rotating shaft 24. One end is fixed to the rear end of the connecting block 31, and the other end is fixed to the bearing 211. After the switch is turned on, the knotting drive part 50 starts to wind, and the connecting rope 22 pulls the sliding part 30 to slide downward, thereby compressing the spring 23.

[0038] In practice, when performing a cervical fistula resection, the housing 10 is placed over the fistula. If the fistula cannot advance within the through-channel 13 of the housing 10, forceps or other auxiliary tools can be used for traction. The device is then pushed into the deep knot of the fistula. A suture 40 is used to tie a loop externally using a common surgical knotting method, with both ends of the suture 40 outside the body. The loop is then placed under the limiting block 32 on the outside of the housing 10. The switch is turned on, the knotting drive 50 rotates, and the connecting rope 22 pulls the sliding part 30, thus moving the loop to the bottom of the column 11. This process is repeated three times to drag all three loops to the bottom of the column 11. At this point, the ends of the suture 40 are tightened, and the three loops slide down the curve of the buffer 12 onto the fistula. Alternatively, each loop can be tightened individually. Finally, the device is removed, excess suture 40 is cut off, and the fistula is excised.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A deep knot-tying device for fistula resection surgery, comprising a housing (10), characterized in that, The housing (10) is fitted onto the outside of the fistula; the outer wall of the housing (10) is provided with a knotting drive part (50), and the side wall of the housing (10) is provided with a through sliding groove (110) and a transmission cavity (111) from the outside to the inside; a sliding part (30) is provided in the sliding groove (110), and a transmission part (20) is provided in the transmission cavity (111), and the transmission part (20) is connected to the sliding part (30); the knotting drive part (50) drives the transmission part (20) to extend or shorten, thereby causing the sliding part (30) to move up and down; the sliding part (30) controls the movement of the suture (40).

2. The deep knot-tying device for fistula resection surgery according to claim 1, characterized in that, The suture (40) is wrapped around the outside of the housing (10).

3. The deep knot-tying device for fistula resection surgery according to claim 1, characterized in that, The housing (10) includes a column (11), a buffer (12) disposed at the lower end of the column (11), and a through channel (13) disposed inside the housing (10).

4. The deep knot-tying device for fistula resection surgery according to claim 3, characterized in that, The buffer (12) is hemispherical.

5. A deep knot-tying device for fistula resection surgery according to claim 1, characterized in that, The sliding part (30) is composed of a connecting block (31), a limiting block (32) disposed at the front end of the connecting block (31), and a fixing block (33) disposed at the rear end of the connecting block (31).

6. A deep knot-tying device for fistula resection surgery according to claim 5, characterized in that, The limiting block (32) protrudes from the outer surface of the shell (10) and abuts against the suture line (40).

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