Hi everyone, I am a new supervisor and I need a little help. Our lab has two Echos, and we use gel and tubes also. When doing comparison studies do I need to run my patients on both echos as well as the gel and tubes. Also, we use the Echos, with tube and gel as back up for antibody identification. Do we need to do comparison for antibody identification as well? The previous supervisor had a procedure in place but what was being done was not satisfactory. What is the rule for using CAP survey samples?. ex Echo to test antibody identification The procedure we have in place states to run at least four patient samples, how many do you run against all methods for the comparison studies? Thanks in advance for all your help. It can be a little overwhleming at times