The ability to drink clear liquids without vomiting after anesthesia a
nd surgery is a commonly used criteria for discharge of pediatric day
surgery patients. We hypothesized that the ability to drink as a prere
quisite for discharge would not affect the frequency of vomiting, dela
y discharge, or increase the frequency of readmission of children for
dehydration after day surgical procedures. We randomized 989 patients
between the ages of 1 month and 18.0 yr to one of two groups. The 464
"mandatory drinkers" were required to demonstrate the ability to drink
clear liquids without vomiting prior to discharge from the hospital,
whereas 525 "elective drinkers" were allowed but not required to drink
. Other than the discharge criteria, the patients were managed in an i
dentical fashion; the minimum volume of intravenous fluids received by
all patients was adequate to supply a calculated 8-h fluid deficit pr
ior to discharge from the hospital. There were no differences between
the two groups in the incidence of vomiting in the operating room, the
postanesthesia care unit, or after discharge from the hospital. Howev
er, in the day surgery unit, only 14% of the elective drinkers vomited
compared to 23% of the mandatory drinker group (P < 0.001). The manda
tory drinkers had a more prolonged stay in the day surgical unit, aver
aging 101 +/- 58 min (mean +/- SD) compared to 84 +/- 40 min for elect
ive drinkers (P < 0.001). No patient in either group required admissio
n to the hospital for persistent vomiting on the day of surgery, and n
o patient required readmission for vomiting or dehydration after disch
arge from the day surgery unit. We conclude that it is unnecessary to
make drinking a prerequisite for discharging pediatric patients after
day surgery.