Related Experiment Videos
Detecting urethral and prostatic inflammation in patients with chronic prostatitis
J N Krieger1, R Jacobs, S O Ross
1Department of Urology, University of Washington School of Medicine, Seattle, USA.
Urology
|February 25, 2000
Summary
The four-glass test, combining urethral smear and lower urinary tract localization, is optimal for diagnosing urethral and prostatic inflammation. Other methods like first-void urine (VB1) and midstream urine (VB2) show low sensitivity for urethral inflammation.
Area of Science:
- Urology
- Infectious Diseases
- Diagnostic Microbiology
Background:
- Diagnosing urethral and prostatic inflammation can be challenging.
- Accurate detection is crucial for effective treatment and patient management.
Purpose of the Study:
- To compare the diagnostic accuracy of various methods for detecting inflammation in lower urinary specimens.
- To identify the most effective approach for diagnosing urethritis and prostatitis.
Main Methods:
- Evaluation of urethral smear, first-void urine (VB1), midstream urine (VB2), expressed prostatic secretions (EPS), and postmassage urine (VB3).
- Standardized protocol applied to urologic patients attending a prostatitis clinic.
- Analysis of leukocyte detection in 235 subjects for urethral inflammation and 83 subjects for prostatic inflammation.
Main Results:
- Gram-stained urethral smear detected leukocytes in 26% of subjects, VB1 in 18%, and VB2 in only 6%.
- VB1 and VB2 exhibited low sensitivity (0-22% and 8-11% respectively) for detecting urethral inflammation compared to urethral swab.
- EPS detected 76% and VB3 detected 82% of prostatic inflammation cases.
Conclusions:
- VB1 and VB2 have low sensitivity for diagnosing urethral inflammation.
- Examining both EPS and VB3 is most effective for detecting prostatic inflammation.
- Combining urethral smear with lower urinary tract localization (four-glass test) is an optimal diagnostic strategy.