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Bladder Voiding (bladder + voiding)
Selected AbstractsDoes bladder voiding during sleep and wakefulness change the behavioural state of infants?ACTA PAEDIATRICA, Issue 12 2006HEINZ ZOTTER Abstract Aim: To evaluate whether bladder voiding in healthy infants is accompanied by body movements or any changes in heart rate (HR), respiratory frequency (RF) or electroencephalogram (EEG) frequency during sleep and during wakefulness. Methods: Polygraphic recordings were performed on 33 healthy infants (17 female) born at term. The infants' age at study entry was 41±10 d, and actual body weight was 4876±403 g (mean±SD). Bladder voiding was recorded by an adapted enuresis detector connected to the polygraphic computer unit. Results: Awakening was observed in 12 (36%) infants 77±9 s before bladder voiding. Twenty-one infants (64%) continued sleeping during bladder voiding. In sleeping infants, bladder voiding occurred during non-REM sleep only, and was accompanied by a cortical arousal. During wakefulness, RF was lower, and HR and EEG frequency were higher, but stayed constant during bladder voiding. Conclusion: Our observations demonstrate that bladder voiding in healthy infants during sleep is accompanied by body movements and changes in HR and EEG frequency, indicating cortical arousals, whereas during wakefulness these changes cannot be observed. [source] Selective activation of the sacral anterior roots for induction of bladder voidingNEUROUROLOGY AND URODYNAMICS, Issue 2 2006Narendra Bhadra Abstract Aim We investigated the efficacy of selective activation of the smaller diameter axons in the sacral anterior roots for electrically induced bladder voiding. Materials and Methods Acute experiments were conducted in five adult dogs. The anterior sacral roots S2 and S3 were implanted bilaterally with tripolar electrodes. Pressures were recorded from the bladder and from the proximal urethra and the external urethral sphincter. A detector and flow meter monitored fluid flow. A complete sacral dorsal rhizotomy was carried out. The effects of two types of pulse trains at 20 Hz were compared; quasitrapezoidal pulses (500 µsec with 500 µsec exponential decay) and interrupted rectangular (100 µsec, 2 sec on/2 sec off). Before rhizotomy, rectangular pulse trains (100 µsec) to activate all fibers were also applied. The experimental design was block randomized before and after rhizotomy. Results Quasitrapezoidal pulses showed block of sphincter activation with average minimum current for maximum suppression of 1.37 mA. All pulse types evoked average bladder pressures above the basal sphincter closure pressure. The pressure patterns in the proximal urethra closely followed the bladder pressures. Before dorsal rhizotomy, stimulation evoked a superadded increase in sphincter pressures with slow rise time. After rhizotomy, the sphincter pressure patterns followed the bladder pressures during selective activation and voiding occurred during stimulation with quasitrapezoidal trains and in between bursts with interrupted rectangular stimulation. Conclusions Selective activation of sacral ventral roots combined with dorsal rhizotomy may provide a viable means of low-pressure continuous voiding in neurological impairment. Neurourol. Urdynam. © 2005 Wiley-Liss, Inc. [source] Does bladder voiding during sleep and wakefulness change the behavioural state of infants?ACTA PAEDIATRICA, Issue 12 2006HEINZ ZOTTER Abstract Aim: To evaluate whether bladder voiding in healthy infants is accompanied by body movements or any changes in heart rate (HR), respiratory frequency (RF) or electroencephalogram (EEG) frequency during sleep and during wakefulness. Methods: Polygraphic recordings were performed on 33 healthy infants (17 female) born at term. The infants' age at study entry was 41±10 d, and actual body weight was 4876±403 g (mean±SD). Bladder voiding was recorded by an adapted enuresis detector connected to the polygraphic computer unit. Results: Awakening was observed in 12 (36%) infants 77±9 s before bladder voiding. Twenty-one infants (64%) continued sleeping during bladder voiding. In sleeping infants, bladder voiding occurred during non-REM sleep only, and was accompanied by a cortical arousal. During wakefulness, RF was lower, and HR and EEG frequency were higher, but stayed constant during bladder voiding. Conclusion: Our observations demonstrate that bladder voiding in healthy infants during sleep is accompanied by body movements and changes in HR and EEG frequency, indicating cortical arousals, whereas during wakefulness these changes cannot be observed. [source] | ||||||||||