Fig. 2
From: Sleep related painful erection: an algorithm for evaluation and management
Proposed algorithm for the evaluation and management of sleep related painful erections. Abbreviations: PE: Painful erection; LUTS: Lower urinary tract symptoms; SRPE: Sleep related painful erection; US: Ultrasound; REM: Rapid eye movement; OSA: Obstructive sleep apnea; PDE: Phosphodiesterase. * Numerator: number of positive experiences; Denominator: total number of treated cases. # Home maneuvers include: walking, urinating, cold showers, cycling. ^ Pathognomonic, but not necessary for diagnosis [27, 30]