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Urinary flow patterns in infants with distal hypospadias.

Abstract：

OBJECTIVE:To investigate preoperative urinary flow patterns in hypospadic infants and compare them to those from normal infant boys. PATIENTS AND METHODS:Twenty-one boys (median age 14.0, range 12.8-21.6 months) referred for distal hypospadias surgery were compared to 19 healthy boys (median age 12.0, 9.2-19.8 months). In both groups a 14-mm transit-time ultrasound flow probe mounted around the base of the penis continuously registered uroflow. RESULTS:Median maximum flow rate (Q(max)) was significantly lower in hypospadics (2.4 vs 4.4 ml/s, P < 0.01) while there was no difference in the voided volume per micturition (19.0 vs 21.0 ml, P 0.33). Flow curve pattern analysis revealed plateau-shaped curves in 31% of hypospadics compared to none in normal infant boys. Interestingly, dyscoordinated flow curves (interrupted, staccato, spike-dome) were less common in the hypospadics (36% vs 64%, P < 0.01). Meatal size did not correlate to Q(max) (rho = 0.26, P = 0.26). CONCLUSIONS:Infants with hypospadias void with a lower Q(max) and a lesser degree of dyscoordination as compared to normal infant boys. It can be speculated that decreased urethral compliance may contribute to the lower Q(max) and may act as a silencer for dyscoordination.

journal_name

J Pediatr Urol

journal_title

Journal of pediatric urology

authors

Olsen LH,Grothe I,Rawashdeh YF,Jørgensen TM

doi

10.1016/j.jpurol.2010.05.013

subject

Has Abstract

pub_date

2011-08-01 00:00:00

pages

428-32

issue

4

eissn

1477-5131

issn

1873-4898

pii

S1477-5131(10)00383-9

journal_volume

7

pub_type

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