Novel absorbable biliary tract suture for laparoscope

Abstract

The novel absorbable biliary tract suture for the laparoscope comprises a suture body and a biliary duct, the suture body comprises a long tail, a first suture needle is arranged at one end of the long tail, a short tail is arranged at the other end of the long tail, a second suture needle is arranged at one end of the short tail, and a suture knot is arranged between the long tail and the short tail. Each of the long thread tail and the short thread tail comprises an outer thread layer, an inner thread layer is arranged inside each outer thread layer, an antibacterial and anti-inflammatory layer is arranged outside each long thread tail, each of the first suture needle and the second suture needle comprises a crescent needle, and a needle head is arranged at one end of each crescent needle. According to the utility model, a single-line double-needle head is designed, a wide line knot is introduced into the middle section of the line to avoid slipping and reduce the knotting frequency, meanwhile, barbs are not arranged on the suture line, so that the phenomenon of bile leakage caused by the damage of the barbed line to bile duct tissues can be avoided, and the use amount of suture line materials can be relatively reduced under the condition that the radial deformation of the suture line is relatively small; and the time for absorbing the suture line is shortened.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, specifically to a novel absorbable bile duct suture for laparoscopy. Background Technology

[0002] With the development of surgical instruments and suture materials, the surgical treatment philosophy for patients with bile duct stones has undergone tremendous changes. Laparoscopic choledochotomy (primary anastomosis) has replaced choledochotomy (with T-tube drainage) as the new mainstream. For certain patients with gallbladder stones, laparoscopic cholecystolithotomy or cholecystectomy has become a new treatment method. Previous suture materials were developed during the era of open surgery, and their usage is not entirely compatible with the new laparoscopic surgical methods. Especially given the significant differences in the suturing philosophy of primary laparoscopic biliary tract (or gallbladder) closure compared to open surgery, biliary surgeons have a more urgent need for new laparoscopic-specific sutures.

[0003] Chinese Patent No. 202210055590.2 discloses a nano-silver absorbable knot-free suture and its preparation method. The preparation method includes taking granular polylactic acid and carboxymethyl chitosan, ball-milling them separately into powders of a specified particle size, and then drying them; mixing the two dried powders, nano-silver powder, and nano-titanium dioxide powder uniformly in a certain proportion to obtain a composite powder; preparing the composite powder into a spinning solution; and adding the spinning solution to a wet spinning machine to produce the nano-silver suture. This invention uses polylactic acid, nano-silver, carboxymethyl chitosan, and nano-titanium dioxide as raw materials, and uses a ball mill to ball-mill the polylactic acid and carboxymethyl chitosan to a specified particle size, which facilitates the interaction between the powders and improves the mechanical properties of the powder. Simultaneously, through mixing and spinning processes, a suture meeting the requirements is produced. This method not only has fewer process steps but also is simple to process and low in cost.

[0004] Existing sutures often only offer single-needle, long-tailed sutures, which cannot support bidirectional suturing. This necessitates multiple knotting during intracavitary suturing, and beginners may easily disrupt the suture's conformability by knotting, increasing material waste. Even double-ended needles are available, but those on the market are typically long-threaded double needles. Their excessively long tails are inconvenient for intracavitary use and must be shortened to a single needle. These types of sutures are unfriendly to beginners and their cumbersome application process prolongs surgery and anesthesia time.

[0005] Currently, there are absorbable barbed sutures available on the market that do not require knotting, which can reduce the learning curve to some extent. However, their barbed structure can easily damage the bile duct wall tissue during biliary duct suturing, causing bile leakage. In severe cases, this complication requires long-term drainage tubes, and the only treatment options are waiting for the patient to heal on their own or a second surgery, both of which prolong hospital stays, increase hospitalization costs, and add to the patient's suffering. Therefore, this is currently the mainstream field of biliary tract surgery. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of absorbable bile duct suture for laparoscopy that avoids damage to the bile duct wall tissue.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: the novel absorbable bile duct suture for laparoscopy comprises a suture and a bile duct. The suture includes a long tail, one end of which is provided with a suture needle, and the other end of which is provided with a short tail. One end of the short tail is provided with a suture needle, and a knot is provided between the long tail and the short tail. Both the long tail and the short tail include an outer suture layer, an inner suture layer is provided inside the outer suture layer, and an antibacterial and anti-inflammatory layer is provided outside the long tail.

[0010] As a preferred embodiment, both the first suture needle and the second suture needle include a crescent-shaped needle, and one end of the crescent-shaped needle is provided with a needle tip.

[0011] As a preferred embodiment, the other end of the crescent needle is provided with a needle tail, and both ends of the suture are integrally formed on different needle tails.

[0012] As a preferred embodiment, the inner wall of the outer wire layer is provided with a connecting post, and the other end of the connecting post is located outside the inner wire layer.

[0013] As a preferred embodiment, the outer layer has an outer air cavity, and the inner layer has an inner air cavity.

[0014] As a preferred embodiment, the bile duct includes an outer wall and an inner wall, and different sutures are respectively sutured to the outer wall and the inner wall.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a novel absorbable bile duct suture for laparoscopy, which has the following beneficial effects:

[0017] 1. By using single-strand suture and single-thread double needle, the problem of bile duct tissue damage caused by barbed suture can be solved. To solve the cumbersome knotting operation of single-needle suture, the design uses single-thread double needle, with a wide knot introduced in the middle of the suture to prevent slippage and reduce the number of knots.

[0018] 2. The absorbable sutures are made of absorbable materials. After a period of time, the suture material can be absorbed by the body, leaving no residue and reducing the probability of bile duct stone recurrence. At the same time, the sutures do not contain barbs, which can avoid barbs damaging the bile duct tissue and causing bile leakage.

[0019] 3. By using the sutures and connecting the column and inner suture layer, the outer suture layer can generate relatively large deformation stress, which can reduce the amount of suture material used while keeping the radial deformation of the suture relatively small, and reduce the absorption time of the suture.

[0020] 4. The antibacterial and anti-inflammatory layer provides the suture with relatively good antibacterial and anti-inflammatory properties, which can have a relatively good antibacterial and anti-inflammatory effect on the needle puncture hole after the bile duct wound is sutured, while preventing wound inflammation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the suture needle structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the suture of this utility model;

[0024] Figure 4 This is a schematic diagram of the suture structure of the present invention.

[0025] In the diagram: 1. Suture thread; 2. Long suture tail; 3. Suture needle one; 4. Short suture tail; 5. Suture needle two; 6. Thread knot; 7. Crescent needle; 8. Needle tip; 9. Needle tail; 10. Outer suture layer; 11. Inner suture layer; 12. Connecting post; 13. Outer air cavity; 14. Inner air cavity; 15. Antibacterial and anti-inflammatory layer; 16. Bile duct; 17. Outer wall of the duct; 18. Inner wall of the duct. Detailed Implementation

[0026] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0027] Please see Figure 1-4This utility model discloses a novel absorbable biliary suture for laparoscopy, comprising a suture 1, which is a PDS suture. The suture 1 is made of absorbable material, and the suture material can be absorbed by the human body after a period of time, leaving no residual material and reducing the probability of bile duct stone recurrence. At the same time, the suture 1 does not contain barbs, which can avoid barbs damaging the bile duct 16 tissue and causing bile leakage. The suture 1 includes a long tail 2, one end of which is provided with a suture needle 3, and the other end of which is provided with a short tail 4. One end of the short tail 4 is provided with a suture needle 5, and a knot 6 is provided between the long tail 2 and the short tail 4. Both the suture needle 3 and the suture needle 5 include a crescent needle 7, one end of which is provided with a needle tip 8, and the other end of which is provided with a needle tail 9. Both ends of the suture 1 are integrally formed on different needle tails 9.

[0028] Both the long suture tail 2 and the short suture tail 4 include an outer suture layer 10. An inner suture layer 11 is provided inside the outer suture layer 10. An antibacterial and anti-inflammatory layer 15 is provided on the outside of the long suture tail 2. The antibacterial and anti-inflammatory layer 15 gives the suture 1 a relatively good antibacterial and anti-inflammatory function, and provides a relatively good antibacterial and anti-inflammatory effect on the needle puncture hole after the bile duct wound is sutured. A connecting post 12 is provided on the inner wall of the outer suture layer 10. The connection structure between the connecting post 12 and the inner suture layer 11 causes the outer suture layer 10 to generate a relatively large deformation stress, so that the radial deformation of the suture 1 is relatively small, and the amount of suture material used is relatively reduced. The other end of the connecting post 12 is located outside the inner suture layer 11. An outer air cavity 13 is provided inside the outer suture layer 10, and an inner air cavity 14 is provided inside the inner suture layer 11. The use of multiple outer air cavities 13 and inner air cavities 14 significantly reduces the amount of PDS material used compared to a solid suture 1 of the same diameter, which can greatly reduce the absorption time of the human body. At the same time, the shortened retention time also reduces the possibility of local inflammation.

[0029] As a preferred embodiment, the bile duct 16 includes an outer wall 17 and an inner wall 18. Different suture lines 1 are respectively sutured to the outer wall 17 and the inner wall 18. The inner wall 18 is sutured from top to bottom using a suture needle 3 at one end of a long suture tail 2, and the outer wall 17 is sutured from bottom to top using a suture needle 3 at one end of another long suture tail 2. Then, the adjacent long suture tails 2 and short suture tails 4 of the two suture lines 1 are tied together.

[0030] The working principle of this utility model is as follows: A first suture needle 3 is fixed to one end of the long suture tail 2, and a second suture needle 5 is fixed to one end of the short suture tail 4. The connecting structure of the connecting post 12 and the inner suture layer 11 causes the outer suture layer 10 to generate relatively large deformation stress, thus reducing the amount of suture material used while minimizing radial deformation of the suture 1 and shortening the absorption time of the suture 1. An antibacterial and anti-inflammatory layer 15 is provided on the outside of the suture 1, giving the suture 1 relatively good antibacterial and anti-inflammatory function. After suturing the bile duct wound, it provides a relatively good antibacterial and anti-inflammatory effect on the needle puncture hole, while preventing wound inflammation. It is made of absorbable material, and the suture material can absorb the suture material after a period of time. The material is absorbed by the body without leaving any residue, which can reduce the probability of bile duct stone recurrence. At the same time, the suture 1 does not contain barbs, which can avoid the barbs damaging the bile duct 16 tissue and causing bile leakage. When suturing the wound, the suture needle 3 at one end of the long suture tail 2 is used to suture the inner wall 18 of the tube from top to bottom, and the suture needle 3 at the other end of the long suture tail 2 is used to suture the outer wall 17 of the tube from bottom to top. Then the adjacent long suture tail 2 and short suture tail 4 of the two suture 1 are tied together. The suture 1 is sutured with a single strand. The use of single strand suture can solve the problem of barbs damaging the bile duct 16 tissue. It is designed with a single thread and double needle head 8. A wide knot is introduced in the middle of the thread to prevent slippage and reduce the number of knots 6.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A new absorbable suture for laparoscopy in biliary tract, comprising a suture thread (1) and a biliary duct (16), characterized in that: The suture line (1) comprises a long line tail (2), one end of the long line tail (2) is provided with a suture needle one (3), the other end of the long line tail (2) is provided with a short line tail (4), one end of the short line tail (4) is provided with a suture needle two (5), a line knot (6) is arranged between the long line tail (2) and the short line tail (4), the long line tail (2) and the short line tail (4) each comprise an outer line layer (10), the inner part of the outer line layer (10) is provided with an inner line layer (11), the outer part of the long line tail (2) is provided with an antibacterial and anti-inflammatory layer (15).

2. The novel absorbable suture for laparoscopy according to claim 1, characterized in that: The suture needle one (3) and the suture needle two (5) each comprise a crescent needle (7), one end of the crescent needle (7) is provided with a needle head (8).

3. The novel absorbable suture for laparoscopy according to claim 2, characterized in that: The other end of the crescent needle (7) is provided with a needle tail (9), both ends of the suture line (1) are integrally formed on different needle tails (9).

4. The novel absorbable suture for laparoscopy according to claim 1, wherein: The inner wall of the outer line layer (10) is provided with a connecting column (12), the other end of the connecting column (12) is arranged outside the inner line layer (11).

5. The novel absorbable suture for laparoscopy according to claim 1, wherein: The inner part of the outer line layer (10) is provided with an outer air cavity (13), the inner part of the inner line layer (11) is provided with an inner air cavity (14).

6. The novel absorbable suture for laparoscopy according to claim 1, wherein: The bile duct (16) comprises a tube outer wall (17) and a tube inner wall (18), and different suture lines (1) are respectively sutured on the tube outer wall (17) and the tube inner wall (18).

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