Hunan Xiang Yi Laboratory Instrument Development Co., Ltd.

Introduction and Use of Medical Centrifuge

Medical centrifuges are widely used. At present, the most widely used centrifuge products in hospitals include high-speed centrifuges, blood centrifuges, blood card centrifuges, urine sediment centrifuges, capillary centrifuges, cytocentrifuges, biopharmaceutical centrifuges, and gels bubble processing centrifuges, etc. This article briefly introduces the purpose, function, application type, usage and management and maintenance specifications of the medical centrifuge. So, let's learn about the introduction and use of medical centrifuges!


1. Purpose and functions of medical centrifuges

1) For separating particles suspended in solution

A. Separation of formed components in blood, concentration of cells or other formed components in body fluids for analytical determination

B. Separation of protein-bound or antibody-bound ligands and free ligands, etc.

C. Separate the proteins that have been precipitated in the specimen.


2) Separation of two liquids of different densities that are incompatible with each other

A. For example, extracting certain components of body fluids with organic solvents.

B. Separation of blood lipid components, such as chylomicrons and various lipoproteins in plasma.


2. Types of medical centrifuge machine applications

1). Horizontal neck type or bucket type.

2). Fixed flat head rotary type or flat head rotary type

3). High-speed centrifugal type. The above three include floor-standing, desktop


3. Principle of medical centrifugal action

Its centrifugal force is expressed by relative centrifugal force (RCF). r is the radius from the center of the rotation axis to the bottom surface of the centrifuge tube (cm ); RCF=1.11810-5rK2 In the formula, 1.11810-5 is the experimental constant, and n is the rotational speed.


4. Medical Centrifuge Operation

To ensure the normal operation of the centrifuge, the maximum load at both ends during centrifugation must not exceed the limits specified by the manufacturer. The high-speed centrifuge should be operated by a special person, and use the tube  by centrifuge tube manufacturer. The centrifuge tubes, tube racks, and centrifuge buckets that are symmetrical at both ends of the rotating shaft should be balanced. Other technicians need to study the rotational speed and the rotating head used.


5. Medical Centrifuge Maintenance

1). When the centrifuge tube or empty tube with specimen in centrifugation is damaged, remove the debris in time, and use disinfectant to turn the centrifuge bucket or head to disinfect the centrifuge hole, etc. If there is radioactive contamination, the contamination shall be removed and recorded in accordance with regulations.

2). Wipe the inside and outside of the centrifuge with a damp cloth at least once a week.

3). Check the balance of the centrifuge every 3 months and add lubricating oil.

4). The carbon brush should be checked every three months, and it should be replaced in time after it is found to be used up.

5). Check whether the speed is consistent with the indicator every three months.