Effect of voluntary retention of urine on plasma and urinary biogenic amines as well as circulatory and respiratory responses.

Stress caused by voluntary retention of urine in 25 normal healthy volunteers has been estimated by measuring the levels of biogenic amines (serotonin, catecholamine) in blood and urine. Estimations were done before and after voluntary retention of urine. Plasma and urine catecholamines and 5-HT significantly increased after retention. Simultaneously rise in BP, PR, RR were also observed. Inference has been drawn that retention of urine may induce stress.