# # Does one need to take and discard so much blood? # When blood is drawn from an indwelling line # normally used for administration of fluids etc, # it had been the practice to first draw and discard 10 cc # and then to take the next 2 cc for blood examination # and determination of blood levels of various 'chemistries' # of interest (22 in all) # Nurses at a Montreal hospital questioned whether this was a # waste of blood, especially in patients who had been given # transfusions, and were undergoing blood work every 4 hours # to monitor progress after a transplant. # so they put the 1st 2 cc of the blood in the syringe into 1 tube, # the next 2 cc into another, and so on, and sent all 6 tubes to the lab, # but not telling the lab that the 6 were from the same patient, # or which tube was which. ds=read.table("BloodValues.txt") names(ds) = c("pt", "tube", "gl" , "bun" , "cr", "ua", "ca" , "po", "na", "k", "cl", "co", "mg", "pr_t", "alb", "bili_t", "bili_d", "cho", "alk_p", "sgot", "sgpt", "ldh", "gammaGT", "amylase")