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[Urethral opening pressure: its clinical significance in prostatic obstruction]
K Ameda1, S Kobayashi, S Matsuura
1Department of Urology, Hokkaido University School of Medicine.
Summary
Urethral opening pressure in men with benign prostatic hypertrophy correlates with objective findings but not overall symptoms. High opening pressure may indicate short-term postoperative urinary control issues.
Area of Science:
- Urology
- Urodynamics
- Benign Prostatic Hypertrophy
Context:
- Benign prostatic hypertrophy (BPH) evaluation often uses pressure-flow studies (PFS).
- Urethral opening pressure (UOP) is a parameter reflecting prostatic obstruction.
- The prognostic value of UOP in BPH surgery is not well-established.
Purpose:
- To analyze the correlation between clinical signs and urethral opening pressure in BPH patients.
- To determine if urethral opening pressure has prognostic value for postoperative outcomes.
Summary:
- 46 BPH patients were divided into high (≥70 cm H2O) and low UOP groups.
- High UOP correlated with detrusor instability, trabeculation, and higher voiding pressures.
- No significant difference in preoperative symptoms (except urge incontinence) or postoperative outcomes was observed between groups.
Impact:
- Urethral opening pressure does not predict surgical success in BPH.
- High UOP may be associated with transient postoperative urinary incontinence.
- Compensatory detrusor hyperactivity can improve voiding efficacy in obstructed patients.