Provoked enuresis-like episodes in healthy children 7 to 12 years old.
OBJECTIVE
We evaluated whether a water load before bedtime provoked enuresis episodes in healthy children with no previous enuresis. We also studied pelvic floor activity during an enuresis episode and the completeness of bladder emptying, attempted to identify a possible trigger mechanism for nocturnal enuresis, and investigated any age and sex differences regarding the frequency of provoked enuresis episodes.


METHODS
We evaluated 55 healthy volunteers (22 girls and 33 boys) 7 to 12 years old who were dry from age 5 years and had no urological or other complaints. Subjects were admitted to the hospital for 4 consecutive nights. Night 1 was for adaptation without a water load. On nights 2 to 4, 25 ml./kg. body weight of water were given orally half an hour before bedtime. During the night pelvic floor activity was monitored, and the time and volume of enuresis and nocturia episodes were noted.


RESULTS
In 17 subjects 28 enuresis-like episodes were provoked, generally comprising incomplete voidings with large residual volumes mostly in younger children and in boys. Enuresis and nocturia episodes were provoked at a volume specific for each individual without a relation to the bladder filling rate.


CONCLUSIONS
Our results support the hypotheses that nocturnal polyuria is an important pathogenetic factor in enuresis and that arousal failure can be provoked in nonenuretic subjects.
Kirk
J
J
Institute of Experimental Clinical Research, University of Aarhus, Denmark.
Rasmussen
P V
PV
Rittig
S
S
Djurhuus
J C
JC
D000293:Adolescent; D002648:Child; D004576:Electromyography; D004775:Enuresis / Q000209:etiology / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D014867:Water / Q000008:administration & dosage
D014867:Water