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Current perception threshold evaluation of the female urethra
Kimberly Kenton1, Elizabeth Fuller, J Thomas Benson
1Department of Obstetrics and Gynecology, Methodist Hospital, Indiana University, Indianapolis, Indiana, USA. kkenton@lumc.edu
Summary
Current perception threshold (CPT) testing is feasible in the female urethra. This method can differentiate between sensory perception and pain thresholds, aiding in assessing nerve pathway function.
Area of Science:
- Urology
- Neuroscience
- Sensory Physiology
Background:
- Assessing urethral sensory function is crucial for diagnosing lower urinary tract (LUT) dysfunction.
- Current perception threshold (CPT) testing is a validated method for evaluating sensory nerve integrity in other anatomical regions.
Purpose of the Study:
- To determine the feasibility and potential utility of CPT evaluation in the female urethra.
- To establish normative sensory and pain thresholds in women without LUT dysfunction.
Main Methods:
- Ten women without LUT dysfunction underwent CPT testing using a Neurometer and a urethral ring electrode.
- Stimulation was applied at 2000, 250, and 5 Hz to determine perception and pain thresholds.
- Statistical analysis was performed to compare perception and pain thresholds across frequencies.
Main Results:
- CPT testing was successfully completed in all 10 subjects.
- Perception thresholds were significantly lower than pain thresholds (P<0.002).
- Mean perception thresholds ranged from 70 microA (2000 Hz) to 17 microA (5 Hz), while pain thresholds ranged from 229 microA (2000 Hz) to 110 microA (5 Hz).
Conclusions:
- Current perception threshold testing is technically feasible in the female urethra.
- This method can differentiate between sensory perception and pain, suggesting its utility for assessing afferent pathway function.
- CPT may serve as a valuable tool for evaluating urethral sensory integrity in clinical settings.