CASE STUDIES Case 5-1 fibody amide form nated gative stube.

CASE STUDIES Case 5-1 fibody amide form nated gative stube. tailed You are working second shift at a suburban hospital. Your laboratory utilizes the conventional tube testing method using LISS as an enhancement medium. About an hour before the end of your shift, the phlebotomist brings you a routine type and screen for a patient just admitted to

116 PART II Blood Groups and Serologic Testing the medical surgical floor. Because you are confident can finish before your shift ends, you decide to proceed with testing. The patient types as an A-positive. The anti- body screen results were negative in all phases of testing. Therefore, check cells were added to all tubes and the reactions after centrifuging were also negative. 1. Can the antibody screen be interpreted as negative? 2. What steps must be taken to resolve the problem? 3. What is the most likely cause for the discrepant results? 4. What are other causes for the results?

116 PART II Blood Groups and Serologic Testing the medical surgical floor. Because you are confident you can finish before your shift ends, you decide to proceed with testing. The patient types as an A-positive. The anti- body screen results were negative in all phases of testing: Therefore, check cells were added to all tubes and the reactions after centrifuging were also negative. 1. Can the antibody screen be interpreted as negative? 2. What steps must be taken to resolve the problem? 3. What is the most likely cause for the discrepant results? 4. What are other causes for the results?