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Urophonographic studies of benign prostatic hypertrophy
1Department of Urology, Institute of Clinical Medicine, University of Tsukuba, Japan.
The Journal of Urology
|May 1, 1991
Summary
Urophonography, a new method for analyzing urethral sounds during urination, can distinguish between healthy individuals and those with benign prostatic hyperplasia (BPH). This technique aids in diagnosing voiding dysfunction and urinary obstruction.
Area of Science:
- Urology
- Medical acoustics
- Diagnostic technology
Background:
- Micturition generates urethral sounds.
- Benign prostatic hyperplasia (BPH) can alter these sounds.
- Novel diagnostic methods for lower urinary tract symptoms are needed.
Purpose of the Study:
- To develop and evaluate a system for recording and classifying urethral sounds during micturition, termed urophonography.
- To differentiate urophonograms between healthy males and those with BPH.
- To assess the utility of urophonography in diagnosing voiding dysfunction.
Main Methods:
- Development of sonic detection and recording systems for urethral sounds.
- Classification of recorded sounds (urophonograms) from healthy volunteers and BPH patients.
- Analysis of sound characteristics including shape, frequency, and power gain.
- Comparison with conventional uroflowmetry.
Main Results:
- Four types of urophonograms were identified: Type 1 (diamond shape), Type 2 (irregular spikes), Type 3 (mixed), and Type 4 (no spikes).
- Types 1, 2, and 3 were associated with BPH, while Type 4 was found in healthy males.
- Post-prostatectomy, a high percentage of Type 4 urophonograms were observed.
- Urethral sound frequency was around 650 Hz, with diamond-shaped sounds having higher power gain.
Conclusions:
- Urophonography is a novel technique for analyzing urethral sounds during micturition.
- Urophonograms can effectively distinguish between healthy individuals and BPH patients.
- This method shows promise for investigating dysfunctional voiding and lower urinary tract obstruction.