Simple minimally invasive fascia stitching instrument

Abstract

The utility model relates to a simple minimally invasive fascia stitching instrument. Comprising a sleeve with a tip at the front end, a telescopic inner rod is arranged in the sleeve, and an elastic lantern ring used for being connected with a silk thread is arranged at the front end of the telescopic inner rod; an operating handle is arranged at the rear end of the sleeve, a fixed seat is arranged behind the operating handle through a neck part, a threaded hole is formed in the center of the fixed seat, a central hole for communicating an inner cavity of the sleeve with the threaded hole is formed in the center of the operating handle and the center of the neck part, and a pushing handle is arranged at the rear end of the telescopic inner rod; an external thread part is further arranged at the root of the telescopic inner rod and located in the threaded hole, and when the telescopic inner rod is operated by pushing the handle to move forwards or backwards in the axial direction, the elastic lantern ring moves out of or retracts into the front end of the sleeve. The utility model provides a simple minimally invasive fascia stitching instrument, which improves the convenience of operation, reduces the range of injury to fascia tissues, can effectively pull out a silk thread in an abdominal cavity, and ensures the stitching effect of fascia.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a simple minimally invasive fascia suture device, which is used in laparoscopic minimally invasive surgery, specifically for closing laparoscopic puncture holes (Trocar holes). Background Art

[0002] In recent years, minimally invasive surgery has been widely carried out in general surgery. Especially the widespread clinical application of laparoscopic surgery and robotic surgery has led to an increasing incidence of abdominal wall puncture hole complications. Common puncture hole complications include bleeding, puncture hole hernia, poor healing, etc. The occurrence of complications is often closely related to poor suture of the puncture hole, and once it occurs, it is often difficult to heal on its own and usually requires surgical intervention to improve. Therefore, the closure of laparoscopic puncture holes is a key step in the operation and requires more suitable instruments to assist in completion.

[0003] The specification of Chinese utility model patent CN215018201U discloses a disposable minimally invasive surgery fascia peritoneum suture device, which includes a needle rod. The tip of the needle rod is provided at the end, a notch is provided on one side close to the tip, the end of the notch is hook-shaped, and a through hole is also provided at a position close to the notch. The other end of the needle rod is provided with a handle. This kind of suture device needs to accurately hang the silk thread on the hook inside the patient's abdominal cavity, with a relatively high operation difficulty. Moreover, during the process of pulling outwards, not only is it easy to drop the thread, but also it is easy to hook the abdominal wall. The specification of Chinese utility model patent CN 217310422U discloses a disposable minimally invasive fascia suture device, which includes a suture device body. A guiding channel is provided on the suture device body, a suture threading device is arranged inside the guiding channel, and rotating plates are arranged on both sides at the bottom end of the suture device body. After inserting the suture into the abdominal cavity, using the clamping force of the inner silicone sheet, the suture is likely to exit along with the suture needle when withdrawn. And due to different body types and cavity wall thicknesses of patients, the suture device is prone to move up and down, affecting the suture effect.

[0004] In summary, it is necessary to develop and design a new type of simple minimally invasive fascia suture device to solve the above-mentioned technical problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a simple minimally invasive fascia suture device, which can improve the convenience of operation, reduce the damage range to fascia tissue, effectively pull out the silk thread in the abdominal cavity, and ensure the suture effect of the fascia.

[0006] The technical solution adopted by the present utility model is as follows: A simple minimally invasive fascia suture device, comprising a cannula with a tip at the front end, a telescopic inner rod disposed within the cannula, and an elastic collar for connecting a silk thread provided at the front end of the telescopic inner rod; an operation handle is provided at the rear end of the cannula, a fixing base is provided through a neck behind the operation handle, a threaded hole is provided at the center of the fixing base, a central hole penetrating the inner cavity of the cannula and the threaded hole is provided at the center of the operation handle and the neck, a pushing handle is provided at the rear end of the telescopic inner rod, and an external thread portion is further provided at the root of the telescopic inner rod and the external thread portion is located within the threaded hole. When the telescopic inner rod is operated by the pushing handle to move forward or backward along the axial direction, the elastic collar is moved out of or retracted into the front end of the cannula.

[0007] Preferably, the elastic collar is made of elastic metal, the main body part is in a rhombus shape, and the root of the elastic collar is fixedly connected to the front end of the telescopic inner rod.

[0008] Preferably, the front end of the telescopic inner rod has a spherical end.

[0009] Preferably, the outer diameter of the telescopic inner rod is equal to the inner diameter of the cannula.

[0010] Preferably, the cannula, the operation handle, the neck, and the fixing base are of an integrally injection-molded structure, the telescopic inner rod, the external thread portion, and the pushing handle are of an integrally injection-molded structure, and the root of the elastic collar is integrally injection-molded inside the spherical end of the telescopic inner rod.

[0011] The advantages and positive effects of the present utility model are as follows:

[0012] The present utility model provides a simple minimally invasive fascia suture device, which is specifically used for closing the laparoscopic puncture hole in laparoscopic minimally invasive surgery. Compared with the existing fascia suture devices, the suture device in the present utility model uses a cannula with a tip to pierce the fascia layer of the patient. The smooth front end of the cannula makes the piercing and pulling-out operations smoother, and will not cause excessive damage to the patient's fascia tissue, ensuring the suture effect of the fascia, facilitating the operation and making it easier for the patient to recover.

[0013] This fascia suture device uses an elastic collar that can be moved out and retracted to connect and pull the silk thread in the abdominal cavity. Compared with the existing methods of connecting and pulling the silk thread, firstly, since the moved-out elastic collar will expand into a ring automatically, it is easier to pass the silk thread through the elastic collar in the abdominal cavity and within the field of view of the endoscope to achieve connection, which improves the convenience and effectiveness of the operation. Secondly, after connecting the silk thread, the elastic collar is retracted. The completely retracted elastic collar pulls a part of the silk thread into the interior of the cannula. In this way, when pulling out this fascia suture device outward, the silk thread can be smoothly pulled out without the problem of falling off or disconnecting, thus improving the effectiveness of the suture operation.

[0014] By providing an operating handle at the rear of the sleeve and a pushing handle at the rear end of the telescopic inner rod, the insertion and extraction of the stapler and the forward and backward displacement of the telescopic inner rod and the elastic collar are made more convenient to operate, reducing the operating burden of the suture operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front sectional structural schematic diagram of the present utility model;

[0016] Figure 2 is Figure 1 a sectional structural schematic diagram of the tip part in

[0017] In the figure:

[0018] 1, pushing handle; 2, fixed seat; 3, neck; 4, external thread part; 5, threaded hole; 6, operating handle; 7, telescopic inner rod; 8, sleeve; 9, ball end; 10, tip; 11, elastic collar; 12, silk thread. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To further understand the content, features and effects of the present utility model, the following embodiments are given for detailed description.

[0020] Please refer to Figure 1 and Figure 2 , the simple minimally invasive fascia stapler of the present utility model includes a sleeve 8 with a tip 10 at the front end. A telescopic inner rod 7 is provided inside the sleeve 8, and an elastic collar 11 for connecting a silk thread 12 is provided at the front end of the telescopic inner rod 7. As shown in the figure, the tip 10 at the front end of the sleeve 8 is achieved by processing the front port of the sleeve 8 into a sharp inclined surface shape. By providing the tip 10, the front end of the stapler is more easily pierced into the fascia layer of the patient. The telescopic inner rod 7 can be displaced forward and backward in the axial direction. When moving forward to the end position, the elastic collar 11 moves out from the front end and expands autonomously under the action of elasticity, so that the silk thread 12 in the patient's abdominal cavity can be inserted into the elastic collar 11. When moving backward to the end position, the elastic collar 11 is squeezed and deformed and completely retracted into the front port of the sleeve 8, and at the same time, the folded part of the silk thread 12 is brought into the front port of the sleeve 8. Then, the stapler is pulled outwards, and the silk thread 12 is pulled out. The two ends of the same silk thread 12 are fastened outside the fascia layer, and the suture of the fascia is completed.

[0021] In this embodiment, the outer diameter of the telescopic inner rod 7 is equal to the inner diameter of the sleeve 8, so that the telescopic inner rod 7 does not shake when moving forward and backward, and at the same time, it can effectively prevent the tissue fluid in the patient's abdominal cavity from entering the gap between the telescopic inner rod 7 and the sleeve 8.

[0022] In this embodiment, the front end of the telescopic inner rod 7 has a ball end 9, that is to say, the front end of the telescopic inner rod 7 is in a hemispherical shape.

[0023] In this embodiment, the elastic collar 11 is made of elastic metal, such as medical-grade stainless steel wire, medical-grade nitinol wire, etc. The main body part is in a rhombus shape. The root of the elastic collar 11 is fixedly connected to the front end of the telescopic inner rod 7. When the elastic collar 11 is in a fully self-expanded state, its transverse dimension is larger than the inner diameter dimension of the sleeve 8. Therefore, when it is pushed out, it can expand autonomously under its own elastic force. When it is subjected to a pulling-back force, it deforms under pressure and finally completely retracts into the front port of the sleeve 8.

[0024] An operating handle 6 is provided at the rear end of the sleeve 8. A fixing seat 2 is provided through a neck 3 behind the operating handle 6. A threaded hole 5 is provided at the center of the fixing seat 2. A central hole that penetrates the inner cavity of the sleeve 8 and the threaded hole 5 is provided at the center of the operating handle 6 and the neck 3. In this embodiment, the sleeve 8, the operating handle 6, the neck 3, and the fixing seat 2 are of an integrally injection-molded structure and are processed by an integrally injection-molding process using medical-grade plastic.

[0025] A pushing handle 1 is provided at the rear end of the telescopic inner rod 7. An external thread portion 4 is further provided at the root of the telescopic inner rod 7 and the external thread portion 4 is located in the threaded hole 5. That part of the telescopic inner rod 7 in front of the external thread portion 4 is located in the central holes of the operating handle 6 and the neck 3. In this embodiment, the telescopic inner rod 7, the external thread portion 4, and the pushing handle 1 are of an integrally injection-molded structure and are processed by an integrally injection-molding process using medical-grade plastic. Moreover, the root of the elastic collar 11 is integrally injection-molded inside the spherical end 9 of the telescopic inner rod 7.

[0026] When the telescopic inner rod 7 is operated by the pushing handle 1 to move forward or backward along the axial direction, the elastic collar 11 moves out of or retracts into the front end of the sleeve 8. Since the root of the telescopic inner rod 7 is connected to the fixing seat 2 through the external thread portion 4 located in the threaded hole 5, the forward and backward displacement of the telescopic inner rod 7 is completed by operating the pushing handle 1 to rotate forward or backward. When the pushing handle 1 rotates forward or backward, the external thread portion 4 enters more or less into the threaded hole 5.

[0027] Production method:

[0028] The sleeve 8, the operating handle 6, the neck 3, and the fixing seat 2 are integrally injection-molded, and the front end of the sleeve 8 is cut or polished to make it sharp; the telescopic inner rod 7, the external thread portion 4, the pushing handle 1, and the elastic collar 11 are integrally injection-molded;

[0029] The above two assemblies are assembled. Specifically, the front end of the telescopic inner rod 7 and the elastic collar 11 are inserted through the rear port of the threaded hole 5 until the external thread portion 4 is combined with the threaded hole 5; then the entire fascia suturing device is sealed in a sterile package to form a disposable medical device consumable.

[0030] Usage method:

[0031] Take out this fascia stapler from the sterile package at the surgical site. Initially, the elastic collar 11 is fully retracted inside the front port of the cannula 8 (which helps with the piercing operation of the fascia layer). Hold the rear part of the stapler (including the operating handle 6, the neck 3, the fixing base 2, and the pushing handle 1), pierce the tip 10 of the cannula 8 through the fascia layer and reach the inside of the patient's abdominal cavity; insert the silk thread 12 into the patient's abdominal cavity through the channel of the endoscope and observe the situation inside the abdominal cavity through the endoscope. Operate the pushing handle 1 to fully move the elastic collar 11 out from the front end. Use surgical clips to pass one end of the silk thread 12 through the expanded elastic collar 11 inside the abdominal cavity. Then, operate the pushing handle 1 to fully retract the elastic collar 11 inside the front port of the cannula 8. At this time, the folded part of the silk thread 12 is also pulled into the front port of the cannula 8. Then, hold the rear part of the stapler and pull it outwards until the front end of the stapler separates from the fascia layer. At this time, one end of the silk thread 12 is brought out. Then, repeat the same operation to insert the stapler into the fascia layer on the other side of the puncture hole and bring out the other end of the silk thread 12. Then, tighten and fasten the two exposed ends of the silk thread 12 outside the abdominal cavity to complete a single suture operation.

Claims

1. A simple minimally invasive fascia suture device, characterized by: The invention comprises a sleeve (8) having a tip (10) at the front end, a telescopic inner rod (7) being arranged in the sleeve (8), and an elastic collar (11) for connecting a thread (12) being arranged at the front end of the telescopic inner rod (7); an operating handle (6) being arranged at the rear end of the sleeve (8), a fixing seat (2) being arranged behind the operating handle (6) through a neck (3), a threaded hole (5) being arranged at the center of the fixing seat (2), and a center hole for connecting the inner cavity of the sleeve (8) and the threaded hole (5) being arranged at the center of the operating handle (6) and the neck (3); a pushing handle (1) being arranged at the rear end of the telescopic inner rod (7), an external threaded portion (4) being arranged at the root of the telescopic inner rod (7), and the external threaded portion being arranged in the threaded hole (5); when the telescopic inner rod (7) is operated by the pushing handle (1) to move forward or backward along the axial direction, the elastic collar (11) is moved out or retracted from the front end of the sleeve (8).

2. The simple minimally invasive fascia suture device according to claim 1, characterized in that: The elastic collar (11) is made of elastic metal, and the main body is in a rhombus shape. The root of the elastic collar (11) is fixedly connected to the front end of the telescopic inner rod (7).

3. The simple minimally invasive fascia suture device according to claim 2, characterized in that: The front end of the telescopic inner rod (7) is provided with a ball end (9).

4. The simple minimally invasive fascia suture device according to claim 3, characterized in that: The outer diameter of the telescopic inner rod (7) is equal to the inner diameter of the sleeve (8).

5. The simple minimally invasive fascia suture device according to claim 4, characterized in that: The sleeve (8), the operating handle (6), the neck (3) and the fixing seat (2) are an integral injection-molded structure, the telescopic inner rod (7), the external threaded portion (4) and the pushing handle (1) are an integral injection-molded structure, and the root of the elastic collar (11) is integrally injection-molded inside the ball end (9) of the telescopic inner rod (7).

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