Urinary flow patterns in infants with distal hypospadias

Area of Science:

• Pediatric Urology
• Medical Engineering
• Infant Health

Background:

• Hypospadias is a common congenital condition affecting the male urethra.
• Understanding voiding dynamics in infants with hypospadias is crucial for surgical planning and management.
• Preoperative assessment of urinary flow patterns can provide insights into urethral function.

Purpose of the Study:

• To investigate and characterize preoperative urinary flow patterns in infants diagnosed with hypospadias.
• To compare the uroflowmetry parameters of hypospadic infants with those of healthy infant controls.

Main Methods:

• Utilized transit-time ultrasound flowmetry with a 14-mm probe around the penile base for continuous uroflow registration.
• Compared 21 boys undergoing hypospadias surgery (median age 14.0 months) with 19 healthy controls (median age 12.0 months).

Main Results:

• Hypospadic infants demonstrated a significantly lower median maximum flow rate (Qmax) (2.4 ml/s vs. 4.4 ml/s, P < 0.01).
• Plateau-shaped flow curves were observed in 31% of hypospadic infants, absent in controls.
• Dyscoordinated flow curves were less frequent in hypospadic infants (36% vs. 64%, P < 0.01).

Conclusions:

• Infants with hypospadias exhibit distinct uroflowmetry characteristics, including lower Qmax and reduced flow dyscoordination.
• Decreased urethral compliance is hypothesized as a contributing factor to reduced Qmax and may mitigate flow dyscoordination in hypospadias.