Extracorporeal Remote Blood Supply Device for Free Skin Flap

Abstract

The invention provides a free skin flap in-vitro distal blood supplying device, and relates to the field of mechanical instruments. The free skin flap in-vitro distal blood supplying device comprises an artery blood supplying unit, a vein blood returning unit, a precise peristaltic pump, a blood anti-freezing device and a temperature control system, wherein the artery blood supplying unit comprises an artery puncture needle, a blood delivery catheter, a flow adjuster, a three-way pipe, a skin flap artery anastomosis needle and an elastic sleeve; the vein blood returning unit comprises a vein puncture needle, a blood delivery catheter, a catheter joint, a three-way pipe, a peristaltic pump pipe, a skin flap vein anastomosis needle and an elastic sleeve; the temperature control system comprises a circulating water pump, a water delivery catheter, a heating catheter and a constant-temperature water tank; the peristaltic pump is precise and is suitable for pumping liquid with medium and small flow; the blood anti-freezing device is a precise injection pump filled with anticoagulant normal saline; and anticoagulant is injected into the artery blood supplying device through a catheter. The free skin flap in-vitro distal blood supplying device is used for distally and continuously supplying blood for free skin flaps circularly in a free skin flap surgery; and the problem that good blood supplying vessels do not exist surrounding a skin flap area is solved.

Description

technical field [0001] The invention relates to a flap blood supply device applied to free flap operation. Background technique [0002] A skin flap is a tissue flap containing skin and subcutaneous fat, which provides blood circulation through the pedicle, and can be transferred or transplanted to cover defective wounds, repair deformities or reconstruct tissues and organs. In some specific cases, the operation needs to cut off the vascular pedicle of the flap to make the flap completely free, and under the operation of microsurgical techniques, the arterial and venous ends of the flap should be anastomosed with the blood vessels in the recipient area. It is free flap surgery. However, when the tissue vessels near the wound are damaged or occluded, there will be no suitable blood supply vessels around the wound and difficult anastomosis of the vascular pedicles during free flap transplantation. [0003] In view of the above situation, some operations currently choose cros...

AI Technical Summary

Problems solved by technology

However, this kind of operation has its defects: the legs need to be crossed and fixed for a long time after operation, which has a great impact on the quality of life of the patient; complications such as deep vein thrombosis of the lower extremities are prone to occur, and it is not suitable for elderly patients; if the contralateral limb If the blood vessel is also damaged, it is difficult to select the blood vessel, which increases the risk of surgery

However, the source of the former is limited and restricted by ethics; the diameter of the latter is limited, and it is clinically used in aortic transplantation, but there are still difficulties in microvascular transplantation

[0004] To sum up, the current free flap surgery is still based on the premise that there are good blood vessels in a short distance. If the situation of severe damage and no good blood vessels around is not completely solved, some patients will have to face amputation, etc. brutal reality

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