The objectives of urethral reconstructive surgery are to maintain function and to produce an aesthetically satisfactory penis. Urethroplasty is the gold standard treatment to manage urethral stricture disease with greater than 90% success for most repair types. ( Wong et al., 2010)
The methods to evaluate the reconstructed urethra include direct observation of the urinary stream, voiding cystourethrography and uroflowmetry (Hussein et al.,2013)
Uroflowmetry tests are simple and non-invasive, and they have been adopted by urologists as preliminary screening tools for voiding dysfunction in men with lower urinary tract symptoms (Juliao et al., 2012).
Due to the increasing popularity of the urethral repair for all types of urethral defects namely, hypospadias and urethral stricture and their potential sequelae include stricture recurrence, critical analysis of the uroflowmetry findings could reflect the elasticity of the neourethra. As described by Poiseuille’s law, the pressure differential created by a tube is directly related to its length and inversely related to the radius. Thus, the neourethra could be stricture-free while its length-to-caliber ratio may be acting as a resistance. In the absence of frank stricture and neomeatal stenosis, elasticity in the neourethra could explain the high incidence of plateau flow curve, increased resistance, and proximal fistula (Braga et al., 2007). |
