Serial residual volumes in men with prostatic hypertrophy

Area of Science:

• Urology
• Medical Imaging

Background:

• Prostatic hypertrophy commonly leads to urinary retention.
• Accurate assessment of residual urine volume is crucial for surgical planning, particularly before Transurethral Resection of the Prostate (TURP).

Purpose of the Study:

• To evaluate the reliability of commonly used formulae for estimating residual urine volume in men with prostatic hypertrophy.
• To determine the clinical utility of single residual urine measurements prior to TURP.

Main Methods:

• Thirty male patients with prostatic hypertrophy were enrolled.
• Each patient underwent three separate scanning sessions on the day preceding TURP.
• Five established formulae were employed to calculate estimated residual urine volumes.

Main Results:

• All five formulae demonstrated significant degrees of error in estimating residual urine.
• A substantial proportion (66%) of patients exhibited significant variations in their residual urine volumes within the same day.
• This intra-day variability suggests inconsistency in measurements.

Conclusions:

• Current methods for estimating residual urine in patients with prostatic hypertrophy are prone to considerable error.
• Performing a single residual urine measurement is not clinically valuable due to high intra-day variability.
• Repeat or more robust assessment methods may be necessary for accurate pre-operative evaluation.