An intraoperative liver suspension device

Abstract

The utility model relates to medical instrument technical field, in order to solve the problem that the existing liver suspension device lacks adjustability, and the stability is insufficient and the problem of big traumatic, proposes a kind of intraoperative liver suspension device, including puncture needle, tip is blunt head;Suspension traction part, connect in the rear end of the puncture needle, for liver sleeve;Suspension ring, connect in the rear end of the suspension traction part, external suspension line, for lifting suspension traction part, realize liver suspension.The utility model can reduce liver tissue damage risk, and accurately, stably, flexibly adjust the sleeve position and force of liver according to the size shape of different liver.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an intraoperative liver suspension device. Background Technology

[0002] Liver suspension is a crucial technique in liver surgery, aiming to expose the surgical field by lifting the liver tissue, facilitating precise manipulation by the surgeon. Traditional methods often use monofilament sutures or rigid instruments for fixation, which have the following drawbacks: Insufficient stability: Monofilament sutures are prone to slippage, especially when the liver surface is smooth or edematous, requiring repeated adjustments and prolonging the operation time; High invasiveness: Some devices require insertion through large incisions or rely on multiple puncture points for fixation, increasing the risk of postoperative complications; Complex operation: Existing instruments lack adjustability, making it difficult to adapt to different liver shapes and surgical needs, relying heavily on the surgeon's experience; Limited field of vision: Fixation devices may obstruct the surgical field, affecting laparoscopic operations.

[0003] The patent number 201520328989.9 describes a laparoscopic liver suspension device, which includes a suspension belt and suspension lines. It adopts a design of double-layer rubber suspension belt combined with figure-eight crisscross suspension lines. It mainly relies on the structural combination of suspension belt, suspension lines and support strips and the knotting of fixing lines for fixation. During the operation, due to traction and other operations, the suspension belt may shift or the knot may loosen, resulting in unstable suspension and affecting the operation. In addition, the suspension belt needs to be fixed by suturing the diaphragm crus during the operation, which increases additional trauma and operation steps. Summary of the Invention

[0004] To address the aforementioned problems, this utility model aims to provide an intraoperative liver suspension device that can reduce the risk of liver tissue damage and precisely, stably, and flexibly adjust the position and force of the suspension on the liver according to different liver sizes and shapes.

[0005] The main idea of ​​the technical solution adopted in this utility model is as follows: A puncture needle is used as the starting segment, with a blunt tip and a retractable end to reduce damage to the liver and surrounding tissues during puncture. A double-wire sling connected to the puncture needle is used, and a sliding guide tube pushes the sling to unfold and encircle the liver, using this as a point of leverage to suspend the liver. A limiting component consisting of a limiting ring and a limiting cavity is provided. After the double-wire sling is encircled by the liver, the limiting component, through the cooperation of a limiting piece, restricts the sliding of the guide tube, ensuring the stability of the double-wire sling and maintaining an effective encirclement of the liver. The fixing head is connected to the suspension ring via a connecting rod, and a suspension line is connected to the outside of the suspension ring. After the double-wire sling is stably encircled by the liver, the suspension line is pulled to suspend the liver. A double-layered outer sleeve is provided outside the guide tube to protect against secondary damage caused by the sliding of the guide tube.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An intraoperative liver suspension device includes: a puncture needle with a blunt tip; a suspension traction unit connected to the rear end of the puncture needle for looping around the liver; and a suspension ring connected to the rear end of the suspension traction unit, with an external suspension line for lifting the suspension traction unit to suspend the liver.

[0008] Further, based on the above technical solution, the suspension traction unit includes: a double-wire collar, the front end of which is connected to the puncture needle; a guide tube, a hollow structure, which is sleeved on the outside of the double-wire collar and slidably connected to the double-wire collar, and the rear end of the guide tube is provided with a limiting component for restricting the sliding of the guide tube; and a fixing head, which has an internal receiving cavity for fixing the rear end of the double-wire collar, and the rear end of the fixing head is fixedly connected to the suspension ring through a connecting rod.

[0009] Furthermore, the limiting component includes: a limiting ring with a hollow structure, sleeved on the rear end of the guide tube, and having several limiting pieces on it; and a limiting cavity, which is a conical cavity with the larger diameter end facing forward, located at the front end of the fixing head, and also having several limiting pieces inside, which cooperate with the limiting pieces on the limiting ring to limit the guide tube.

[0010] Furthermore, the guide tube is further provided with a double-layered outer sleeve, the outer layer of which is a flexible tube and the inner layer is a rigid guide sheath.

[0011] Furthermore, through the above technical solution, the needle tip of the puncture needle is a retractable head.

[0012] The beneficial effects of this utility model are:

[0013] 1. The puncture needle is designed with a blunt tip and a retractable tip, which can reduce damage to the liver tissue when puncturing into the surrounding tissues of the liver, reduce the risk of intraoperative bleeding, and avoid puncturing the liver or other important tissues. At the same time, the double-layer structure of the outer sleeve further protects the tissue and ensures the safety of the operation.

[0014] 2. By using a double-wire loop connected to the puncture needle, the double-wire loop is pushed out and looped around the liver through a sliding guide tube. The liver is suspended by this point of force. After the double-wire loop is looped around the liver, the position of the guide tube is fixed by a limiting component to prevent the double-wire loop from loosening or shifting. This utility model can flexibly adjust the looping position and force on the liver according to the surgical needs to achieve precise suspension. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged view of a portion at point A;

[0017] Figure 3 This is a schematic diagram of the limiting component structure of this utility model;

[0018] Figure 4 This is a schematic diagram showing the connection relationship between the suspension ring and the fixing head of this utility model;

[0019] Figure 5 This is a schematic diagram of the fixing head structure of this utility model;

[0020] Figure 6 This is a schematic cross-sectional view of the fixing head of this utility model;

[0021] Figure 7 This is an initial state diagram of the present invention without the limiting component;

[0022] Figure 8 This is a diagram showing the final state of the present invention without the limiting components.

[0023] Figure 9 This is a schematic diagram of the first model of the present invention;

[0024] Figure 10 This is a schematic diagram of the second model of this utility model.

[0025] The components are: 1. Puncture needle; 2. Guide tube; 3. Fixing head; 301. Receiving cavity; 302. Connecting rod; 4. Double-wire ferrule; 5. External sleeve; 501. Flexible tube; 502. Rigid guide sheath; 6. Suspension ring; 7. Limiting assembly; 701. Limiting ring; 702. Limiting cavity; 703. Limiting plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] The inventors' research found that traditional liver suspension often uses monofilament suspension or rigid instruments for fixation, which is not stable enough, highly invasive, complicated to operate, lacks adjustability, and is difficult to adapt to different patients' liver shapes and surgical needs.

[0028] Based on the above findings, this application proposes an intraoperative liver suspension device. The device uses a puncture needle as the starting point, with a blunt tip and a retractable end. A double-wire loop connected to the puncture needle is used, and a slidable guide tube pushes the loop to unfold and encircle the liver, suspending it at this point. A limiting component consisting of a limiting ring and a limiting cavity is provided. After the double-wire loop encircles the liver, the limiting component, through the cooperation of a limiting plate, restricts the sliding of the guide tube, ensuring the stability of the double-wire loop and maintaining effective liver encirclement. A fixing head is connected to the suspension ring via a connecting rod. A suspension line is connected to the outside of the suspension ring. After the double-wire loop stably encircles the liver, the suspension line is pulled, suspending the liver. A double-layered outer sleeve is provided outside the guide tube to protect against secondary damage caused by guide tube slippage.

[0029] Example 1

[0030] See Figures 1-10 This application discloses an intraoperative liver suspension device, including a puncture needle 1 for puncturing the tissues surrounding the liver, which allows the subsequent suspension traction unit to pass through and loop around the liver smoothly. The puncture needle 1 has a length of 150-200mm and a diameter of 2-3mm. Its tip is blunt to reduce damage to the liver and surrounding tissues. At the same time, the needle tip is a retractable head. When the puncture needle 1 is punctured to the appropriate position, the retractable head can automatically retract, further avoiding excessive damage to the tissue. It should be noted that the retractable head is similar to the retractable head on a pneumoperitoneum needle, which is prior art and will not be described in detail here.

[0031] Next, the rear end of the puncture needle 1 is connected to a suspension traction part for looping around the liver. The suspension traction part includes a double-wire loop 4, a guide tube 2, and a fixing head 3.

[0032] Specifically, the double-wire loop 4 consists of two wires, with the front end fixedly connected to the puncture needle 1 and the rear end passing through and fixedly connected to the fixing head 3. The fixing head 3 has a receiving cavity 301 inside to accommodate the double-wire loop 4 for fixing the rear end of the double-wire loop 4. Preferably, the double-wire loop 4 is made of medical-grade nickel-titanium shape memory alloy wire, which has good elasticity and shape memory function and can remain stable in different states. At the same time, the double-wire loop 4 is coated with biocompatible silicone to increase friction and ensure that it will not easily slip off when it is looped around the liver.

[0033] The guide tube 2 has a hollow structure and is made of a flexible material with a certain degree of rigidity. Preferably, the material is polyetheretherketone (PEEK), which can provide sufficient rigidity and flexibility. The guide tube 2 is sleeved on the outside of the double-wire loop 4 and is slidably connected to the double-wire loop 4. By sliding the guide tube 2 to adjust its relative position with the double-wire loop 4, the size of the loop 4 can be adjusted to adapt to different patients' abdominal cavity depth, liver position, shape and size, which facilitates the adjustment of suspension force and position during operation and allows for flexible operation.

[0034] Next, a limiting component 7 is provided at the rear end of the guide tube 2 to restrict the sliding of the guide tube 2 relative to the double-wire loop 4 when the guide tube 2 is slidably adjusted to the desired size of the double-wire loop 4. The limiting component 7 includes a limiting ring 701 and a limiting cavity 702.

[0035] Specifically, the limiting ring 701 has a hollow structure and is sleeved on the rear end of the guide tube 2. Its diameter is slightly larger than that of the guide tube 2. Preferably, in order to increase the friction between the limiting ring 701 and the guide tube 2, it can be threaded. Several limiting pieces 703 are provided on the outer side of the limiting piece 703. It is worth noting that the length of the limiting ring 701 can be selected according to different sizes.

[0036] The limiting cavity 702 is a conical cavity, fixedly installed at the front end of the fixing head 3, with the larger diameter end facing forward. It also contains several limiting pieces 703. When the guide tube 2 slides to a suitable position, the limiting ring 701 at the rear end of the guide tube 2 abuts against the limiting cavity 702. The limiting pieces 703 on the limiting ring 701 cooperate with the limiting pieces 703 in the limiting cavity 702 at the front end of the fixing head 3 to abut against each other, restricting the sliding of the guide tube 2 and stabilizing the state of the double-wire collar 4 around the liver.

[0037] Next, an outer sleeve 5 is fitted around the guide tube 2. The outer sleeve 5 has a double-layer structure, with an outer flexible tube 501 to reduce tissue damage and an inner rigid guide sheath 502 to provide support for the guide tube 2. Preferably, the outer layer is made of flexible medical silicone and the inner layer is made of medical stainless steel. The length of the guide tube 2 is greater than that of the outer sleeve 5, which helps to provide a certain passage for the guide tube 2 after a part of the outer sleeve 5 enters the appropriate position in the human body, thereby reducing tissue friction and damage. Specifically, at the start of the puncture, the outer sleeve 4, with its outer flexible tube 501, can gently contact and pass through the tissue surrounding the liver. After the puncture is in place, the rigid guide sheath 502 of the inner layer of the outer sleeve 5 not only provides stable support for the guide tube 2, preventing it from bending or twisting during the push process and ensuring that the guide tube 2 can accurately reach the target position, but also avoids direct contact between the guide tube 2 and the surrounding tissue. When the guide tube 2 is adjusted in position multiple times or left in place for a long time, it prevents the guide tube 2 from repeatedly rubbing against the tissue due to movement, effectively reducing the possibility of secondary damage to the puncture site caused by the sliding of the guide tube 2.

[0038] Furthermore, a suspension ring 6 is fixedly connected to the rear end of the fixing head 3 via a connecting rod 302. Specifically, one end of the connecting rod 302 is fixedly connected to the top of the fixing head 3, and the other end is fixedly connected to the suspension ring 6. The suspension ring 6 is made of medical-grade titanium alloy, with an anti-slip texture on the surface, and is connected to an external suspension line for lifting the suspension traction part to achieve liver suspension.

[0039] Application Examples:

[0040] The puncture needle 1 is inserted into the lower left rib area of ​​the abdomen. After the puncture, the external sleeve is fixed to the abdominal wall, acting like a puncture device, allowing part of the device to penetrate into the abdominal cavity. Under the guidance of the laparoscope, the guide tube 2 is inserted into the abdominal cavity through the external sleeve 5 to reach the liver area. The puncture needle is inserted into the round ligament of the liver and fixed to the upper abdominal wall. Then, the right diaphragmatic angle is fully freed, the hepatogastric ligament is cut, the guide tube 2 is withdrawn and slid, and the size of the double-wire loop 4 is adjusted. The double-wire loop 4 forms a ring in the appropriate position. The double-wire loop 4 is placed on the left lobe of the liver with surgical forceps, so that it firmly covers most of the left lobe of the liver that needs to be suspended. Then, the suspension ring remaining outside the abdominal cavity is pulled up by the suspension line, thereby achieving complete suspension of the liver.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An intraoperative liver suspension device, characterized in that, include: Puncture needle (1), with a blunt tip; The suspension traction part is connected to the rear end of the puncture needle (1) and is used to loop around the liver; The suspension ring (6) is connected to the rear end of the suspension traction unit and has an external suspension line for lifting the suspension traction unit to achieve liver suspension.

2. The intraoperative liver suspension device according to claim 1, characterized in that, The suspension traction unit includes: The double-wire loop (4) is connected at its front end to the puncture needle (1); The guide tube (2) has a hollow structure and is sleeved on the outside of the double wire ferrule (4) and is slidably connected to the double wire ferrule (4). The rear end of the guide tube (2) is provided with a limiting component (7) for limiting the sliding of the guide tube (2). The fixing head (3) has an internal cavity (301) for fixing the rear end of the double wire ferrule (4). The rear end of the fixing head (3) is fixedly connected to the suspension ring (6) via a connecting rod (302).

3. The intraoperative liver suspension device according to claim 2, characterized in that, The limiting component (7) includes: The limiting ring (701) has a hollow structure and is sleeved on the rear end of the guide tube (2), on which several limiting pieces (703) are provided. The limiting cavity (702) is a conical cavity with the larger diameter end facing forward. It is located at the front end of the fixed head (3). Several limiting pieces (703) are also provided inside it, and they cooperate with the limiting pieces (703) on the limiting ring (701) to achieve the limiting effect on the guide tube (2).

4. The intraoperative liver suspension device according to claim 2, characterized in that: The guide tube (2) is fitted with a double-layered outer sleeve (5), the outer layer of which is a flexible tube (501) and the inner layer is a rigid guide sheath (502).

5. The intraoperative liver suspension device according to claim 1, characterized in that: The tip of the puncture needle (1) is designed to reach the retractable head.

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