A percutaneous gastrostomy suturing device

Abstract

The utility model discloses a kind of percutaneous gastrostomy suturing devices, including steel sleeve, scale, memory alloy puncture needle, suture and positioning mechanism, steel sleeve is hollow, and with needle tip;Scale is arranged on the steel sleeve outer wall, and steel sleeve puncture depth can be measured;Memory alloy puncture needle is inserted in the steel sleeve inner cavity, and is hollow, with needle tip;Suture is inserted in the memory alloy puncture needle inner cavity;Positioning mechanism is installed on the steel sleeve outer wall, and the steel sleeve puncture depth is positioned.Replaces traditional double-needle puncture, avoids threading uncertainty, reduces suturing difficulty, shortens gastrostomy operation time.

Description

Technical Field

[0001] This utility model relates to a preoperative suturing technique for gastrostomy, specifically a percutaneous gastrostomy suturing device, belonging to the field of medical device technology. Background Technology

[0002] Percutaneous gastrostomy refers to the insertion of a feeding tube into the stomach cavity through percutaneous puncture under image guidance to address the enteral nutrition support problem for patients with advanced esophageal cancer, ALS, or other conditions that prevent oral feeding.

[0003] The working principle of the currently used products in clinical applications is as follows: Percutaneous gastrostomy first requires suturing and fixing the stomach body to the abdominal wall to prevent stomach displacement and puncture failure when using the gastrostomy puncture kit. This requires a suture guide tool, which is essentially two parallel hollow puncture needles. One can be called the suture introduction needle, used to introduce the suture into the stomach cavity. The other can be called the suture exit needle, which has a pre-molded loop inside. An external operating part allows the loop containing the suture to be pulled out of the exit needle for knotting and suturing. When the molded loop is extended, it unfolds into a ring shape and extends with a certain arc towards the underside of the introduction needle, eventually ending completely below the suture needle. Thus, the suture inserted from the introduction needle extends into the loop, and is then pulled out of the body through the external operating part. This process allows the suture to enter the body from the outside via the introduction needle, and then be pulled out by the exit needle, completing the suturing process between the stomach body and the abdominal wall.

[0004] The traditional suturing methods described above are prone to failure because the suture may become damp or deformed under stress during insertion into the stomach cavity, posing a risk of it not accurately entering the loop. Sometimes, multiple attempts are required to insert the suture into the loop, making the procedure difficult and the gastrostomy time-consuming. Utility Model Content

[0005] The purpose of this invention is to provide a percutaneous gastrostomy suturing device to at least solve the problem of difficult preoperative suturing in the prior art.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a percutaneous gastrostomy suturing device, comprising a steel cannula, a measuring ruler, a shape memory alloy puncture needle, a suture, and a positioning mechanism. The steel cannula is hollow and has a needle tip; the measuring ruler is disposed on the outer wall of the steel cannula and can measure the puncture depth of the steel cannula; the shape memory alloy puncture needle is inserted into the inner cavity of the steel cannula and is hollow and has a needle tip; the suture is inserted into the inner cavity of the shape memory alloy puncture needle; the positioning mechanism is installed on the outer wall of the steel cannula to position the puncture depth of the steel cannula.

[0007] Preferably, the shape memory alloy puncture needle is U-shaped in its normal state, and the tip has a groove for securing the suture.

[0008] Preferably, the length of the steel sleeve is greater than 10cm.

[0009] Preferably, the positioning mechanism includes a fixing plate, a clamping plate, and a nut. The fixing plate is slidably fitted onto the outer wall of the steel sleeve. There are at least three clamping plates, which are installed circumferentially in the middle of the right side wall of the fixing plate, and the outer wall of the clamping plates is threaded. The nut is screwed onto the outer wall of the clamping plate.

[0010] Preferably, the outer surface of the clamping plate is a slope.

[0011] The beneficial effects of this invention are as follows: Under contrast imaging, the puncture depth of the steel cannula is clearly defined; under measurement, the fixation plate is positioned at the designated location; the nut is tightened to press the clamp onto the fixation plate, thus securing the fixation plate and allowing for precise puncture of the steel cannula. The memory function of the shape memory alloy puncture needle is activated, allowing it to puncture in reverse. The other end of the suture is then removed, the shape memory alloy puncture needle is retracted into the steel cannula, and the suture is withdrawn. Finally, the stomach body and abdominal wall are successfully sutured. This invention completely avoids the possibility of suture failure during traditional double-needle puncture, reduces suturing difficulty, and shortens the gastrostomy surgery time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the puncture structure;

[0014] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0015] Figure 4 This is a front sectional view of the positioning mechanism.

[0016] In the diagram: 1. Steel sleeve; 2. Measuring ruler; 3. Shape memory alloy puncture needle; 4. Suture thread; 5. Positioning mechanism; 6. Slot; 51. Fixing plate; 52. Clamping plate; 53. Nut. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-4As shown, this utility model provides a technical solution: a percutaneous gastrostomy suturing device, including a steel tube 1, which is hollow and has a needle tip. The length of the steel tube 1 is greater than 10cm. After the patient's stomach is inflated, the steel tube 1 can complete the puncture for patients of various body types. A measuring ruler 2 is provided on the outer wall of the steel tube 1 for measuring the puncture depth. A shape memory alloy puncture needle 3 is inserted into the inner cavity of the steel tube 1. The shape memory alloy puncture needle 3 is a nickel-titanium alloy, which is an alloy material with shape memory function. It can be bent into a U-shape at human body temperature. The tip of the shape memory alloy puncture needle 3 has a groove 6. A suture 4 is inserted into the inner cavity of the shape memory alloy puncture needle 3. The suture 4 can be locked in the inner cavity of the groove 6 to prevent the end of the suture 4 from retracting into the shape memory alloy puncture needle 3. A positioning mechanism 5 is installed on the outer wall of the steel tube 1 to position its puncture depth.

[0019] As a technical optimization of this utility model, the positioning mechanism 5 includes a fixing plate 51, which is slidably sleeved on the outer wall of the steel sleeve 1. The fixing plate 51 blocks the steel sleeve 1, and the steel sleeve 1 is pierced accurately. At least three clamping plates 52 are installed circumferentially in the middle of the right side wall of the fixing plate 51. The outer wall of the clamping plate 52 is provided with threads, and a nut 53 is screwed onto the outer wall of the clamping plate 52.

[0020] As a technical optimization of this utility model, the outer wall of the clamping plate 52 is shaped as an inclined surface. When the nut 53 rotates onto the clamping plate 52, the clamping plate 52 moves inward under the action of the inclined surface, so that the clamping plate 52 is pressed against the outer wall of the steel sleeve 1, thereby positioning the fixing plate 51.

[0021] Working principle:

[0022] Step 1: Inflate the patient's stomach through the gastric tube to make the stomach fit tightly against the abdominal wall. Under CT guidance, measure the puncture angle and depth to determine the puncture depth of the steel cannula 1. Tighten the nut 53 away from the clamp 52 so that the clamp 52 no longer squeezes the steel cannula 1. Move the fixing plate 51 to slide on the steel cannula 1. Locate the position of the fixing plate according to the length unit of the measuring ruler 2. Tighten the nut 53 on the clamp 52 to fix the fixing plate 51. Adjust the insertion depth of the steel cannula 1.

[0023] Step two: Insert the steel cannula 1 into the stomach cavity from the designated point on the abdominal wall until the fixation plate 51 rests on the skin. Once the steel cannula 1 reaches the designated position, push the shape memory alloy puncture needle 3 into the stomach. Affected by temperature, the shape memory alloy puncture needle 3 gradually bends into a U-shape. Then, pull back the shape memory alloy puncture needle 3 and the steel cannula 1 simultaneously. The shape memory alloy puncture needle 3 is then pushed back out of the body. Remove the suture 4 from the slot 6. Push the steel cannula 1 into the stomach cavity to allow the shape memory alloy puncture needle 3 to return to the stomach cavity. Pull the shape memory alloy puncture needle 3 outward until it is fully inserted into the steel cannula 1. Pull out the steel cannula 1 along with the shape memory alloy puncture needle 3. The shape memory alloy puncture needle 3 is withdrawn from the suture 4, leaving both ends of the suture 4 outside the body. At this point, tighten and tie the suture 4 to fix the abdominal wall and stomach wall, allowing the percutaneous gastrostomy to proceed with the next steps.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A percutaneous gastrostomy suturing device, characterized in that, include: The steel sleeve (1) is hollow and has a needle tip; A measuring ruler (2) is set on the outer wall of the steel sleeve (1) and can measure the puncture depth of the steel sleeve (1); A shape memory alloy puncture needle (3) is inserted into the inner cavity of the steel sleeve (1) and is hollow with a needle tip; The suture (4) is inserted into the inner cavity of the shape memory alloy puncture needle (3); The positioning mechanism (5) is installed on the outer wall of the steel sleeve (1) to position the puncture depth of the steel sleeve (1).

2. The percutaneous gastrostomy suturing device according to claim 1, characterized in that, The memory alloy puncture needle (3) is U-shaped under normal conditions, and the tip is provided with a groove (6) to hold the suture (4).

3. The percutaneous gastrostomy suturing device according to claim 2, characterized in that, The steel sleeve (1) has a length greater than 10cm.

4. The percutaneous gastrostomy suturing device according to claim 3, characterized in that, The positioning mechanism (5) includes: The fixing plate (51) is slidably fitted onto the outer wall of the steel sleeve (1); The clamps (52), numbering at least three, are installed circumferentially in the middle of the right side wall of the fixing plate (51), and the outer wall of the clamps (52) is provided with threads; Nut (53) is screwed onto the outer wall of the clamp (52).

5. A percutaneous gastrostomy suturing device according to claim 4, characterized in that, The outer surface of the clamp (52) is a slope.

Images