2019 Medical Laboratory Science: Reasons for inconsistent results of positive and negative ABO stereotypes

?2019 Tianjin Hospital Recruitment|Medical and Health Examination Announcements and Publicity Summary (continuously updated)

1. Personnel operation factors

(1) During the operation process Failure to operate in accordance with standardized operating procedures

(2) Zhang Guanli Dai

(3) The centrifugation speed and time do not meet the requirements

(4) Inability to correctly interpret the test results< /p>

(5) The prepared red blood cell suspension is too thin or too concentrated

(6) Use unclean test tubes

(7) Ignore the hemolysis of blood samples Phenomenon

(8) The ratio of added antigen and antibody is inappropriate, resulting in false positive or false negative results

2. Reagent factors

(1) Reagent contamination

(2) Reagent failure, expiration, etc.

3. Blood sample itself factors

(1) The elderly and infants have weak antibody levels

< p> (2) Reduction of antigenic epitopes on the surface of red blood cells

(3) Agglutination of red blood cells caused by disease or bacterial infection

The above are the reasons for the inconsistent results of positive and negative blood group identification In summary, students must pay attention to clarify their ideas when answering and answer in an organized manner. The answer is mainly from three major aspects, namely, thinking factors, reagent factors and specimen factors. Remember it during later review.

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