phonatory threshold pressure
Also written as: PTP — Phonatory Threshold Pressure
Minimum subglottal pressure required to initiate vocal fold oscillation and voice production.
Full Definition
Phonatory threshold pressure (PTP) represents the lowest subglottal air pressure needed to overcome vocal fold tissue resistance and begin phonation. This aerodynamic measure is typically expressed in centimeters of water pressure and varies with vocal fold tension, hydration, and pathological conditions. Elevated PTP values may indicate vocal fold stiffness, dehydration, or mass lesions, while reduced values might suggest vocal fold atrophy or paralysis. PTP measurements are valuable for assessing vocal efficiency and monitoring treatment outcomes.
Usage
Usage note: Commonly abbreviated as PTP in clinical documentation; specify measurement units as cm H2O.
In Context
- "Phonatory threshold pressure was elevated at 8.2 cm H2O, suggesting increased vocal fold stiffness." — Aerodynamic assessment report
- "Following hydration therapy, PTP decreased from 7.1 to 4.3 cm H2O, indicating improved vocal fold pliability." — Treatment response documentation