Twelve‐hour daytime observation of voiding pattern in newborns <4 weeks of age

Abstract

Voiding pattern in the preterms differed in many ways from that of the full-term newborns. Frequent interrupted and incomplete voiding pattern in the preterm newborns indicates a disrupted coordination of the detrusor-sphincter and a delayed maturation of the neural micturition centre.

The voiding pattern in healthy pre- and term infants and toddlers: a literature review

“…In the latter population, a significant increase is detected at days 1-4 (p<0.05) and at days 14-28 (p<0.01) [4]. This differs from the preterm-born children where the interval is situated only at one time period: day 14-28 [4] (Fig. 5).…”

“…It ranged in preterm infants from 6.7-14.1 ml [32,33], whereas in "term" infants, the voided volume can be as large as 77 ml [11]. In the latter population, a significant increase is detected at days 1-4 (p<0.05) and at days 14-28 (p<0.01) [4]. This differs from the preterm-born children where the interval is situated only at one time period: day 14-28 [4] (Fig.…”

“…In general, interrupted voiding decreases with age [6,7,17]. In preterm infants (gestational age 32 weeks), this is present in 58-70 % of all voids, whereas in "term" children, this ranges from 23 to 40 % [4,30]. The phenomenon is rarely detected in infants older than 1 year, when toilet training was introduced [6, 13] (Fig.…”

“…Voided volume increases significantly according to age [7,13], especially after the first 6 months of life [36]. The voided volume of preterm infants is generally smaller than that of "term"-born infants (p<0.05) [4,30]. It ranged in preterm infants from 6.7-14.1 ml [32,33], whereas in "term" infants, the voided volume can be as large as 77 ml [11].…”

“…Sixty percent of the Bterm^-born infants voided when being awake. This percentage is as much as the double of the awake voiding percentage in preterm infants (30 %) [4]. During micturition, overt signs of arousal and body movements were consistently detectable [36].…”