The effect of posture and repetition on urodynamic parameters: A prospective randomized study

Area of Science:

• Urology
• Urodynamics
• Men's Health

Background:

• Benign prostatic hyperplasia (BPH) can affect lower urinary tract symptoms.
• Urodynamic studies are crucial for evaluating bladder function.

Purpose of the Study:

• To assess how body posture and repetition of filling cystometry influence urodynamic parameters in men with BPH.
• To examine the correlation between overactive bladder (OAB) symptoms and detrusor overactivity (DO).

Main Methods:

• 71 men with BPH underwent two filling cystometry sessions.
• Participants were randomized into four groups based on posture changes (supine-supine, erect-erect, supine-erect, erect-supine).
• Evaluated effects of posture and repetition on bladder sensation, compliance, maximum cystometric capacity (MCC), and detrusor overactivity (DO).

Main Results:

• The supine posture led to decreased bladder sensation and DO, with increased bladder compliance and MCC compared to the erect posture.
• A second filling cystometry resulted in further reductions in sensation and DO, and increased MCC.
• The supine posture during the first filling cystometry demonstrated a better correlation between OAB and DO, and between maximum voided volume (MVV) and MCC.

Conclusions:

• Body posture and repetition significantly impact urodynamic parameters.
• Supine posture and repeated cystometry decrease bladder sensitivity and overactivity.
• Supine posture offers a more reliable correlation with OAB symptoms than erect posture during initial cystometry.