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A medical intramedullary venous return device

A technology of venous return and medullary cavity, which is applied in medical science, surgery, etc., to achieve the effect of preventing embolism

Active Publication Date: 2021-08-10
何志友
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, intramedullary infusion and blood transfusion itself is a relatively mature and reliable treatment method, but it has not been reported for venous drainage of skin flaps

Method used

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  • A medical intramedullary venous return device
  • A medical intramedullary venous return device
  • A medical intramedullary venous return device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment includes a hollow screw 1, a drill core 2, a guide core 3 and a vein anastomotic ring 4. The cavity of the hollow screw 1 is used in conjunction with the drill core 2 or the guide core 3. After the drill core 2 is loaded into the hollow screw 1 Drill into the bone cortex 5 as a whole, then take out the drill core 2, replace the guide core 3 and put it into the hollow screw 1, the head of the guide core 3 communicates with the return vein through the vein anastomotic ring 4, and the tail passes through the bone cortex 5 Connects to the bone marrow cavity 6.

[0030] The hollow screw 1 is made of medical stainless steel material, the inner wall is smooth, and the outer wall is provided with upper and lower threads in opposite directions. The upper thread 11 is used to fix the drill core 2 or guide core 3, and the lower thread 12 is used to penetrate into the bone marrow. A protruding ring 13 with a groove is arranged between the cavity 6 and the upper thre...

Embodiment 2

[0036] The difference between this embodiment and Embodiment 1 is that the hollow screw 1 is made of titanium alloy material, the drill core 2 is made of medical stainless steel, the guide core 3 is made of polytetrafluoroethylene material, and the vein anastomotic ring 4 is made of polyester material .

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Abstract

A medical intramedullary venous return device, comprising a hollow screw (1), a drill core (2), a guide core (3) and a venous anastomotic ring (4), the cavity of the hollow screw (1) and the drill The core (2) and the guide core (3) are used together, the drill core (2) is put into the hollow screw (1) and drilled into the bone marrow cavity (6) as a whole, and then the drill core (2) is replaced with the guide core (3), the guide core (2) communicates with the return vein (7) through the venous anastomotic ring (4). The present invention provides a venous return scheme for skin flap surgery when there is no ideal vein in the recipient area for anastomosis; the device uses high-strength metal materials combined with more biocompatible polymer materials to facilitate its realization of corresponding functions; The inner wall of the guide core made of polymer materials can be coated with a sustained-release drug film to achieve long-term anticoagulation and prevent backflow channel embolism.

Description

technical field [0001] The invention relates to a medical treatment device, in particular to a medical intramedullary venous return device. Background technique [0002] Clinically, a large number of patients with skin defects accompanied by bone exposure require local flap or free flap surgery. Patients who need free skin flaps need to find arteriovenous anastomoses in the recipient area that match the flaps in the donor area, so as to realize the establishment of blood supply of the skin flap. Clinically, there is often a lack of available blood vessels in the recipient area, especially veins, which are thinner than arteries and often exist in a network structure, which is difficult to use. Venous reflux disorder is one of the most serious complications of free flap surgery, often leading to surgical failure. Taking the common clinical scalp avulsion injury as an example, because the scalp vein wall is thin and widely connected into a network, it is difficult to anastomo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/16
Inventor 何志友赵爽陈翔
Owner 何志友
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