Method, device and system for recovering red blood cells from autologous blood

Abstract

The invention provides a red blood cell recovery method, device and system in autologous blood. The system includes: a blood delivery device, a centrifugal device, a frequency conversion speed regulating device and a blood recovery controller; the centrifugal device includes a centrifugal cup and a centrifugal motor; the blood delivery The device includes: a peristaltic pump, a stepper motor and a stepper motor driver. The stepper motor driver drives the stepper motor to rotate under the control of the blood recovery controller, and then drives the peristaltic pump to send the patient's blood loss stored in the blood storage tank to the centrifuge. In the cup; the blood recovery controller obtains the current speed of the separation cup in real time, and compares the current speed with the preset speed threshold range. If the current speed falls outside the preset speed threshold range, control the frequency conversion speed regulating device to adjust the current speed. Make the current speed fall within the preset speed threshold range. The invention can dynamically adjust the rotating speed of the centrifuge cup to prevent the problem of red blood cell destruction during the use of the autologous blood recovery machine.

Description

technical field [0001] The invention relates to autologous blood recovery technology, in particular to a method, device and system for recovering red blood cells from autologous blood. Background technique [0002] With the advancement of science and technology and the rapid development of electronic technology, autologous blood salvage technology has been widely used in clinical medicine. The autologous blood salvage machine collects traumatic bleeding or intraoperative bleeding into the blood storage device through a negative pressure absorption device, mixes it with an appropriate amount of anticoagulant during the suction process, and uses a high-speed centrifugal blood centrifuge cup to separate the red blood cells after multi-layer filtration out, and shunt the waste liquid, broken cells and harmful components into the waste liquid bag. Then the blood cells are washed, purified and concentrated with normal saline, and finally the pure and concentrated blood cells are ...

AI Technical Summary

Problems solved by technology

[0004] The hematocrit of the red blood cells retained in the centrifuge cup is directly related to the centrifugation speed. The higher the speed, the higher the hematocrit, but it will also cause the destruction of red blood cells and reduce the recovery rate of red blood cells.

However, in the existing blood separation and cleaning process, the centrifugal speed is constant at 5650pm, which cannot give good consideration to hematocrit and red blood cell recovery rate.

Under the current technical conditions, the red blood cell recovery rate generally does not exceed 90%

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