Premium
Voiding pattern in healthy newborns
Author(s) -
Gladh G.,
Persson D.,
Mattsson S.,
Lindström S.
Publication year - 2000
Publication title -
neurourology and urodynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.918
H-Index - 90
eISSN - 1520-6777
pISSN - 0733-2467
DOI - 10.1002/(sici)1520-6777(2000)19:2<177::aid-nau8>3.0.co;2-0
Subject(s) - medicine , provocation test , diuresis , enuresis , urination , residual volume , urinary system , crying , anesthesia , pediatrics , renal function , lung volumes , alternative medicine , pathology , lung , psychiatry
Abstract A 4‐hour observation period has been used in infants to investigate suspected bladder dysfunction. The aim of the present study was to extend the usefulness of this protocol by establishing reference values for voiding frequency, intervals, volumes, and residual urine in healthy newborns. The study included 51 healthy newborns, 26 girls and 25 boys, aged 3 to 14 days. During a 4‐hour period, all micturitions and residuals were recorded as well as feeding, sleeping, crying, and defecations. The observation was completed with the child undressed to observe the urinary stream during one void. Different provocation tests were tried to induce urinary leakage. All newborns voided with a stream, about once per hour, with a median volume of 23 mL. For each voiding parameter, there was a large inter‐ and intra‐individual variability. Double voidings were common as well as sizable residual volumes. The diuresis was about six times higher than in healthy school children. The healthy newborns did not leak during provocation tests such as manual compression of the bladder. Neurourol. Urodynam. 19:177–184, 2000. © 2000 Wiley‐Liss, Inc.