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The voiding pattern of healthy preterm neonates.

Artikel i vetenskaplig tidskrift
Författare Ulla Sillén
Ewa Sölsnes
Anna-Lena Hellström
Kenneth Sandberg
Publicerad i The Journal of urology
Volym 163
Nummer/häfte 1
Sidor 278-81
ISSN 0022-5347
Publiceringsår 2000
Publicerad vid Institutionen för omvårdnad
Institutionen för kvinnors och barns hälsa, Avdelningen för pediatrik
Sidor 278-81
Språk en
Länkar www.ncbi.nlm.nih.gov/entrez/query.f...
Ämnesord Female, Humans, Infant, Newborn, Infant, Premature, physiology, Male, Urination, physiology
Ämneskategorier Fysiologi, Barn

Sammanfattning

PURPOSE: To elucidate further the maturation of voiding habits from gestation to infancy we investigated the free voiding pattern of healthy preterm neonates. MATERIALS AND METHODS: We evaluated 11 male and 8 female healthy preterm newborns at a mean of 32 weeks after cessation of menstrual flow (postmenstrual age). Assessment was done in the neonatal ward using 4-hour voiding observation, a method described previously in studies of free voiding pattern of full-term newborns. RESULTS: The voiding pattern of male and female preterm neonates was characterized by 1 void per hour and a mean voided volume of 53% of bladder capacity with 58% frequency of interrupted voiding. Residual urine was increased but varied during observation (mean 11% bladder capacity) and was 0 after at least 1 void during 4 hours in 14 of the 19 subjects. Two-thirds of all voiding occurred during sleep, whereas a third of the newborns showed signs of arousal with a mean awake time of only 17 minutes. CONCLUSIONS: The voiding pattern of preterm versus full-term subjects is characterized by an increased number of interrupted voidings, further indicating that these voidings represent immature behavior of detrusor-sphincter coordination. Also, the high number of voidings during sleep suggest a more immature pattern for preterm newborns.

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