Peak urine flow as a predictor of urine infection and retention after coronary artery bypass grafting.

Peak urine flow rates were measured in 83 men before coronary artery bypass grafting. The patients were grouped according to the method of Drach et al. [1] into those with normal, equivocal or abnormal flow rates. No cases of urine infection occurred in any of the 3 groups and only 2 patients in the group with abnormal peak flow developed urine retention. This was not statistically significant. Peak urine flow did not appear to be useful in predicting urine retention after coronary artery bypass grafting.