Skip to main content

Nocturnal Penile Tumescence Markers

Meaning

Nocturnal Penile Tumescence (NPT) markers are objective physiological measurements of spontaneous erections that occur during the Rapid Eye Movement (REM) phases of sleep, serving as a critical clinical indicator of vascular and neurological integrity. The assessment of NPT frequency, rigidity, and circumference helps differentiate between psychogenic and organic (vascular or neurological) causes of erectile dysfunction. Robust NPT markers signify an intact vascular supply and neurological signaling pathway, reflecting overall endothelial health and hormonal sufficiency. These markers are essential for a precise diagnostic workup in male sexual health.