CN211213711U - Controllable-caliber leakage-proof bracket for interventional TIPS (plastic surgery and surgical intervention) - Google Patents

Abstract

The utility model discloses an intervene TIPS operation with controllable pipe diameter leak protection support. The stent comprises a main body of a reticular structure stent, a controllable ring and a covering film; the two ends of the net-shaped structure support main body are provided with the controllable rings; the controllable ring is a hollow ring body; the controllable loop includes a first end and a second end; the first end portion has a larger bore diameter than the second end portion; the second end is nested within the first end. The utility model has the advantages of diameter can be increased according to different gradients and leakage prevention as required.

Description

Controllable diameter leak-proof stent for interventional TIPS surgery

technical field

The utility model relates to the technical field of medical devices, in particular to a leak-proof stent with a controllable diameter for interventional TIPS surgery.

Background technique

Interventional TIPS (transjugular portosystemic shunt) is an important surgical method for the treatment of massive gastrointestinal bleeding due to liver cirrhosis. Opening the blood flow channel connecting the portal vein and the hepatic vein through the stent is the most important part of the operation. Due to the short development time of this surgical method, the surgical stent used is not yet very mature. In current clinical practice, if the diameter of the stent is not selected properly, it will lead to narrowing of the blood flow channel, which is not conducive to relieving the disease, or lead to excessive blood flow channel and cause serious complications such as hepatic encephalopathy.

The current research shows that the stent diameter of 6-10mm is suitable for TIPS, but there are several problems: 1) The results of this study are limited to the specifications of stent diameters commonly used in the market, and it is not enough to accurately quantify the optimal diameter; 2) Due to individual differences, the above research results may not be the most suitable for individual patients; 3) According to the stent diameter estimated by the surgeon before surgery, the diameter size can only be fine-tuned after stent implantation. If the stent is not suitable, the stent will not be able to effectively relieve the disease; 4) After the stent is implanted for a period of time (months to years), thrombus may form in the stent and block the lumen of the stent, causing the disease to worsen again; If it cannot be adjusted, the current better treatment method is to perform TIPS again.

Since the intrahepatic bile duct and portal vein are tightly wrapped in the vascular sheath, the bile duct may be perforated during the process of puncturing the blood vessel to establish a channel, leading to bile into the blood, causing complications such as jaundice. And there is no good treatment for this complication of bile into the blood. The currently used stents include stent-grafts. Although the symptoms can be relieved to a certain extent, the ruptured bile duct has not been effectively treated.

Based on the above background, there is an urgent need to develop a leak-proof stent with a controllable diameter for interventional TIPS surgery, which can be increased in diameter according to different gradients as required, and can treat bile intrusion.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a leak-proof stent with a controllable diameter for interventional TIPS operation, the diameter can be increased according to different gradients as required, has a leak-proof function, can effectively alleviate the complications that may be caused by bile duct rupture, and has a simplified structure. Easy to operate.

In order to achieve the above purpose, the technical scheme of the present utility model is as follows: a controllable diameter leak-proof stent for interventional TIPS operation, including a mesh structure stent body, and is characterized in that: it also includes a controllable ring and a membrane;

The controllable rings are provided at both ends of the main body of the mesh structure bracket;

The controllable ring is a hollow annular body; the controllable ring includes a first end and a second end; the aperture of the first end is larger than the aperture of the second end;

The second end is nested within the first end.

In the above technical solution, tooth slots are provided on the inner wall of the first end portion; there are multiple tooth slots;

The distance between two adjacent tooth slots is set to πmm.

In the above technical solution, a toothed protrusion is provided on the outer wall of the second end portion; the toothed protrusion is matched and connected with the tooth groove.

In the above technical solution, there are seven tooth slots and at least one tooth protrusion.

In the above technical solution, the covering film is attached to the outer wall of the main body of the mesh structure stent; the outer side of the covering film is provided with a procoagulant drug coating.

The utility model has the following advantages:

(1) The utility model is simple in structure and easy to operate;

(2) the utility model can improve the TIPS operation effect and reduce the possibility of complications;

(3) The two ends of the main body of the mesh structure stent of the present invention are circular hollow collar structures, which basically do not affect the hemodynamics;

(4) The two ends of the main body of the mesh structure stent of the present utility model are circular hollow collar structures, and are provided with tooth grooves and tooth convex structures, which can quantitatively control the diameter of the stent; If the diameter of the tube has not yet reached the optimal state for remission of the disease, the diameter of the tube can be expanded again to minimize the occurrence of complications such as hepatic encephalopathy;

(5) The utility model can adjust the diameter of different stents as needed in the first operation, and can adjust the diameter of the stent again after the operation; it overcomes the limitation of the stent for interventional TIPS operation in the prior art, which is limited by the operator before the operation. The estimated and selected stent diameter can only fine-tune the diameter of the tube in the first operation; it overcomes the blockage after a period of time after stent placement in the prior art, and it is not easy to improve the patient's condition through the original delivery channel Shortcomings;

(6) The leak-proof function of the present invention is realized by the coating on the main body of the stent and the procoagulant drug coating on the outer side of the coating. To a certain extent, it prevents bile from entering the blood through the stent mesh; secondly, the procoagulant drug on the procoagulant drug coating can promote blood coagulation, and the coagulated blood will cover and block the adjacent bile ducts that have been broken during the operation, which is complementary to the covering effect. , so as to effectively prevent the complications that may be caused by bile duct rupture;

The utility model provides a controllable diameter leak-proof stent for interventional TIPS surgery, which can quantitatively control the diameter of the tube according to the condition of the individual patient, and has the following functions: First, the present invention can be used according to the different stages of the patient during the operation or after the operation. Adjusting the diameter of the stent, or expanding the diameter of the stent through the original delivery channel after the stent is blocked, can easily and effectively relieve the patient's condition; Blocking the ruptured bile duct with coagulated blood can effectively prevent complications that may be caused by bile duct rupture; The treatment of similar patients provides scientific guidance basis; the utility model can not only promote the clinical research of the operation method, but more importantly, can finally achieve the best treatment effect for current and future patients.

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.

FIG. 2 is an enlarged view of part A of FIG. 1 .

In the figure, 1-controllable ring, 1.1-first end, 1.11-alveolar, 1.2-second end, 1.21-tooth convexity, 2-net structure stent body, 3-film, 4-procoagulant drug Coated, 5-controllable diameter leak-proof stent for interventional TIPS surgery.

Detailed ways

The implementation of the present utility model will be described in detail below with reference to the accompanying drawings, but they do not constitute a limitation to the present utility model, but only serve as examples. At the same time, the advantages of the present invention are made clearer and easier to understand through the description.

Referring to the accompanying drawings, it can be known that the controllable diameter leak-proof stent for interventional TIPS operation includes a mesh structure stent body 2, a controllable ring 1 and a coating 3;

The controllable ring 1 is provided at the upper and lower ends of the mesh structure bracket main body 2; the controllable ring 1 is a hollow annular body; the controllable ring 1 includes a first end 1.1 and a second end 1.2 ; The aperture of the first end 1.1 is larger than the aperture of the second end 1.2;

The second end portion 1.2 is sheathed in the first end portion 1.1 (as shown in Figure 1), and can be pulled out, thereby expanding the diameter of the controllable diameter leak-proof stent 5 for interventional TIPS surgery; The utility model has a stable structure, improves the TIPS operation effect, and reduces the possibility of complications.

Further, a toothed slot 1.11 is provided on the inner wall of the first end portion 1.1; there are multiple toothed slots 1.11; the toothed slot 1.1.1 is a right-angled triangle; The effect of being stuck can be;

The spacing between two adjacent tooth slots 1.11 is set to πmm; the diameter of the utility model can be increased according to different gradients as required, the diameter of the utility model bracket is set to 5-11mm, the circumference is πd, and the diameter is increased by 1mm each time , the circumference is increased by πmm, and the distance between two adjacent tooth slots is also πmm; there are seven gradients from 5 to 11mm, namely 5, 6, 7, 8, 9, 10, 11mm, so there are also seven tooth slots. It can also be set to other distances according to actual needs; it overcomes the disadvantage that the diameter of the commonly used bracket is a fixed value (6-10mm), and its size cannot be adjusted according to needs.

Further, a toothed protrusion 1.21 is provided on the outer wall of the second end portion 1.2; (as shown in Figure 2); the toothed protrusion is a right-angled triangle that matches with the tooth slot; the toothed protrusion 1.21 and the toothed protrusion The groove 1.11 is matched and connected; the tooth protrusion 1.21 is closely connected with the tooth groove 1.11 to prevent the controllable diameter leak-proof bracket 5 for interventional TIPS surgery from slipping.

Further, there are seven tooth grooves 1.11; at least one tooth convexity 1.21; tooth grooves 1.11 and tooth convexity 1.21 are tightly fastened to prevent slippage of the controllable diameter leak-proof bracket 5 for interventional TIPS surgery.

Further, the film 3 is attached to the outer wall of the mesh structure stent body 2; the outer side of the film 3 is coated with a procoagulant drug coating 4 (as shown in FIG. 1 ); the procoagulant drug coating 4. Coated on the outside of the film 3, that is, on the side of the film 3 in contact with the liver tissue puncture tract;

The procoagulant drug coating promotes blood clotting, causing the blood produced during the establishment of blood flow channels to form a thrombus, covering the adjacent damaged bile duct.

As shown in Figure 1 and Figure 2: the working process of the controllable diameter leak-proof stent for interventional TIPS operation described in the present invention is as follows:

Step 1: Before use, the controllable diameter leak-proof stent 5 for interventional TIPS surgery is routinely compressed to the smallest diameter and placed in the protective sleeve;

Step 2: Routinely establish a delivery channel, transport the controllable diameter leak-proof stent 5 for interventional TIPS surgery to a suitable position in the intrahepatic delivery channel and release it; the delivery channels of the controllable diameter leak-proof stent 5 for interventional TIPS surgery are in sequence are: external jugular vein, superior vena cava, inferior vena cava, hepatic vein, intrahepatic puncture, portal vein;

Step 3: When it is necessary to increase the diameter of the leak-proof stent 5 with a controllable diameter for interventional TIPS surgery, the diameter of the main body 2 of the mesh structure stent is expanded to a smaller degree (slightly larger than the initial diameter) through a balloon;

Step 4: Observe the blood flow by angiography. If the angiography result is not satisfactory, use the balloon again to expand the diameter of the main body 2 of the mesh structure stent until the angiography result is satisfactory;

Step 5: If the controllable diameter leak-proof stent 5 for interventional TIPS surgery is blocked after a period of time, the delivery channel of the controllable diameter leak-proof stent 5 for interventional TIPS surgery described in step 2 can be passed through the balloon to the mesh again. The main body 2 of the stent-like structure is expanded in diameter until the clinical needs are met.

In actual use, the diameters of the various components of the present invention can be changed according to requirements.

Other unexplained parts belong to the prior art.

Claims (5)

1. A controllable diameter leak-proof stent for interventional TIPS operation, comprising a mesh structure stent main body (2), characterized in that: also comprising a controllable ring (1) and a coating (3); The controllable rings (1) are provided at both ends of the mesh structure bracket main body (2); The controllable ring (1) is a hollow annular body; the controllable ring (1) comprises a first end (1.1) and a second end (1.2); the aperture of the first end (1.1) larger than the aperture of said second end (1.2); The second end portion (1.2) is sheathed within the first end portion (1.1). 2. The controllable diameter leak-proof stent for interventional TIPS operation according to claim 1, characterized in that: a tooth slot (1.11) is arranged on the inner wall of the first end (1.1); the tooth slot (1.11) 1.11) There are multiple; The distance between two adjacent tooth slots (1.11) is set to πmm. 3. The controllable diameter leak-proof stent for interventional TIPS operation according to claim 2, characterized in that: a toothed protrusion (1.21) is provided on the outer wall of the second end (1.2); the toothed protrusion (1.21) 1.21) is connected with the tooth slot (1.11). 4. The leak-proof stent with controllable diameter for interventional TIPS operation according to claim 3, characterized in that: there are seven tooth slots (1.11) and at least one tooth protrusion (1.21). The controllable diameter leak-proof stent for interventional TIPS surgery according to claim 4, characterized in that: the coating (3) is attached to the outer wall of the mesh structure stent main body (2); the The outer side of the covering film (3) is provided with a procoagulant drug coating.

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