Interventional hepatic vein blocking device
By designing an interventional hepatic vein occlusion device and using the anterior and posterior balloon structure and valve to control pneumatic dilation, the problem of hepatic vein blockade in laparoscopic surgery is solved, and the rapid, safe and reliable vascular blockade effect of the hepatic vein is achieved.
Patent Information
- Application Number
- CN202422205480.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing balloon catheter with a cardiovascular intervention is difficult to first place the guidewire and then the balloon catheter during laparoscopic surgery, especially in the case of short hepatic veins, which leads to an unsatisfactory reduction of central venous pressure and ineffective blocking blood flow.
An interventional hepatic venous occlusion device is designed, including a core wire stent and an outer tube, anterior balloon and posterior balloon are connected, gas flow is controlled through valves, and the anterior balloon is dilated by the air pressure in the posterior balloon to achieve vascular blockade, which is suitable for shorter hepatic veins.
It achieves rapid, safe and reliable blockade of the hepatic vein, adapts to short target blood vessel length, is easy to operate, has strong practicality and promotion prospects.
Smart Images
Figure CN223232741U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of surgical instruments, in particular to an interventional hepatic vein blocking device. Background Art
[0002] Laparoscopic techniques are currently widely used in liver surgery, and preventing and controlling bleeding during surgery is a major concern. To minimize bleeding, the hepatic portal is often blocked to reduce blood flow into the liver. Another measure is to lower central venous pressure to reduce reflux resistance and reduce backflow from the hepatic vein and inferior vena cava. However, for various reasons, central venous pressure often cannot be reduced to the desired level. Therefore, we have considered temporary hepatic vein occlusion. Currently, balloon-loaded catheters used for cardiovascular intervention are used for vascular occlusion. This procedure involves first inserting a guidewire through a distal incision in the vessel, then advancing a balloon-loaded catheter over the guidewire. Once the target vessel is reached, the balloon is inflated to dilate or occlude the vessel.
[0003] Currently, balloon catheters used in cardiovascular interventions are primarily used for cardiovascular interventional procedures and come with a separate guidewire. However, in laparoscopic surgery, inserting the guidewire first and then the balloon catheter is nearly impossible. Furthermore, the hepatic vein is relatively short, making the procedure relatively easy and eliminating the need for a guidewire. Utility Model Content
[0004] In order to solve the problems mentioned in the background technology, the purpose of the present invention is to provide an interventional hepatic vein blocking device.
[0005] In order to achieve the above objectives, the technical solution of the utility model is:
[0006] An interventional hepatic vein occlusion device comprises a core wire stent and an outer tube, wherein the core wire stent is arranged in the outer tube, the front end of the outer tube is connected to a front balloon, the core wire stent passes through the front balloon and is sealedly connected to the front balloon, a rear balloon is sleeved at a rear position of the peripheral wall of the outer tube, the peripheral wall of the outer tube is sealedly connected to the rear balloon, a plurality of side holes are opened on the peripheral surface of the outer tube inside the rear balloon, a valve is connected to the outer tube between the front balloon and the rear balloon, the rear end of the outer tube is connected to a Luer connector, and a sealing cap is detachably connected to the Luer connector.
[0007] Furthermore, the core wire stent is connected to a flexible guiding mechanism at a section outside the front balloon, and the flexible guiding mechanism includes a spring coil sheath and a protective cap. The spring coil sheath is arranged on the periphery of the core wire stent, and the protective cap is connected to the end of the spring coil sheath. The core wire stent in the spring coil sheath becomes thinner in a stepped manner from back to front.
[0008] The beneficial effects of the present invention are as follows: during surgery, a branch of a pre-blocked blood vessel (such as the middle hepatic vein) is dissected out, the front of the interventional hepatic vein blocking device is placed into the target blood vessel, the valve is unscrewed, and the pressurized air in the rear balloon flows into the front balloon, causing the front balloon to expand, thereby blocking the blood vessel. At the end of the operation, the gas is first extracted by connecting the Luer connector to the syringe, and the front balloon returns to its hollow folded state before use, and then the interventional hepatic vein blocking device is pulled out. This device fixes the core wire stent and the outer tube together. Compared with an independent core wire stent (guide wire), it can adapt to the shorter length of the target blood vessel, and has the advantages of convenience, speed, safety, reliability, etc. It is highly practical and has a strong prospect for application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.
[0010] Explanation of the accompanying figures: 1. core wire stent, 2. outer tube, 21. front balloon, 22. rear balloon, 23. side hole, 3. valve, 4. Luer connector, 41. sealing cap, 5. spring coil sheath, 6. protective cap. DETAILED DESCRIPTION
[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.
[0012] like Figure 1 As shown, an interventional hepatic vein occlusion device includes a core wire stent 1 and an outer tube 2. The core wire stent 1 is made of stainless steel and is arranged in the outer tube 2. The front end of the outer tube 2 is connected to a front balloon 21. Both the outer tube 2 and the front balloon 21 are made of polyamide. The core wire stent 1 passes through the front balloon 21 and is sealed with the front balloon 21. A rear balloon 22 is sleeved on the rear position of the peripheral wall of the outer tube 2. The rear balloon 22 is made of polyamide material. The peripheral wall of the outer tube 2 is sealed with the rear balloon 22. A number of side holes 23 are opened on the peripheral surface of the outer tube 2 inside the rear balloon 22. A valve 3 is connected to the outer tube 2 between the front balloon 21 and the rear balloon 22. The rear end of the outer tube 2 is connected to a Luer connector 4. A sealing cap 41 is detachably connected to the Luer connector 4.
[0013] In actual application, taking the middle hepatic vein as an example, gas is injected into the rear balloon 22 through the Luer connector 4 in advance, the front part of the interventional hepatic vein blocking device is placed into the target blood vessel, the valve 3 is unscrewed, and the pressurized air in the rear balloon 22 flows into the front balloon 21, and the front balloon 21 expands to achieve the effect of blocking the blood vessel. At the end of the operation, the gas is first extracted by connecting the syringe with the Luer connector 4, and the front balloon 21 returns to the hollow folded state before use, and then the interventional hepatic vein blocking device is pulled out. This device fixes the core wire stent 1 and the outer tube 2 together. Compared with the independent core wire stent 1 (guide wire), it can adapt to the shorter length of the target blood vessel, has the advantages of convenience, speed, safety, reliability, etc., is highly practical, and has a strong application and promotion prospect.
[0014] In this embodiment, a section of the core wire stent 1 outside the front balloon 21 is connected to a flexible guiding mechanism, and the flexible guiding mechanism includes a spring coil sheath 5 and a protective cap 6. The spring coil sheath 5 is arranged on the periphery of the core wire stent 1, and the protective cap 6 is connected to the end of the spring coil sheath 5. The core wire stent 1 in the spring coil sheath 5 becomes thinner in a stepped manner from back to front. With this solution, the core wire stent 1 and the spring coil sheath 5 ensure a soft tip, so that the front end of the entire blocking device has a certain supporting force and flexibility, and has strong tissue tracking ability.
[0015] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. An interventional hepatic vein occlusion device, comprising a core wire stent (1) and an outer tube (2), wherein the core wire stent (1) is arranged in the outer tube (2), and is characterized in that: The front end of the outer tube (2) is connected to a front balloon (21), the core wire stent (1) passes through the front balloon (21) and is sealed with the front balloon (21), a rear balloon (22) is sleeved at a rear position of the peripheral wall of the outer tube (2), the peripheral wall of the outer tube (2) is sealed with the rear balloon (22), a plurality of side holes (23) are opened on the peripheral surface of the outer tube (2) inside the rear balloon (22), a valve (3) is connected to the outer tube (2) between the front balloon (21) and the rear balloon (22), and a Luer connector (4) is connected to the rear end of the outer tube (2), and a sealing cap (41) is detachably connected to the Luer connector (4).
2. The interventional hepatic vein occlusion device according to claim 1, characterized in that: The core wire stent (1) is connected to a flexible guiding mechanism at a section outside the front balloon (21), and the flexible guiding mechanism includes a spring coil sheath (5) and a protective cap (6). The spring coil sheath (5) is sleeved on the periphery of the core wire stent (1), and the protective cap (6) is connected to the end of the spring coil sheath (5). The core wire stent (1) in the spring coil sheath (5) becomes thinner in a stepped manner from back to front.