Method and device for extracting platelet-rich plasma from blood

Abstract

The invention relates to a method and device for extracting platelet-rich plasma from blood. The method comprises the steps that a conical head of a first injector containing blood subjected to anticoagulation treatment faces downwards, the first injector is centrifuged for 5-45 minutes at the relative centrifugal force of 300-3000 g, and the content in the first injector is divided into a platelet-poor plasma layer, a platelet-rich plasma layer and a red blood cell layer from top to bottom; the conical head of the first injector is kept downward, and the red blood cell layer in the first injector is transferred into a collecting container through a communicating piece; the conical head of the first injector is kept downward, and the platelet-rich plasma layer in the first injector is transferred into the second injector through the communicating piece, so that only the platelet-rich plasma layer is contained in the second injector; and the platelet-rich plasma in the second injector and the blood coagulation agent in the third injector transferred to a spraying device, the platelet-rich plasma and the blood coagulation agent are mixed in the spraying device to generate platelet-rich gel, and the platelet-rich gel is sprayed from the spraying device.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a method and a device for extracting platelet-rich plasma from blood. Background technique [0002] After centrifugation, the blood will be divided into three layers, from top to bottom are platelet-poor plasma (Platelet-Poor Plasma, PPP) layer, platelet-rich plasma (Platelet-Rich Plasma, PRP) layer and red blood cell layer. Liquid PRP is usually injected into the treatment site to accelerate wound healing and repair cartilage damage, etc. Gel-like PRP is suitable for bonding, filling wounds, covering wounds and preventing the loss of growth factors, so it is widely used in the medical field. In the prior art, primary centrifugation or secondary centrifugation is usually used to extract PRP. However, primary centrifugation generally extracts the middle PRP layer, which will cause the PRP located in the middle layer to diffuse into the upper PPP layer. Or the red blood ce...

AI Technical Summary

Problems solved by technology

In the prior art, primary centrifugation or secondary centrifugation is usually used to extract PRP. However, primary centrifugation generally extracts the middle PRP layer, which will cause the PRP located in the middle layer to diffuse into the upper PPP layer. or the underlying red blood cell layer resulting in lower PRP extraction concentration and recovery

The double centrifugation rule requires two centrifugation processes, which obviously complicates and lengthens the extraction process required

In addition, in the prior art, the extracted liquid PRP is usually injected directly, so the use effect is relatively general

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