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Sexual dysfunction and poor HR-QoL was identified on validated questionnaires in both groups. Men with SRPE had a normal resting PDU and abnormal sleep architecture with REM awakenings and significantly more Periodic limb movements ( p = 0.04) than men with SP suggesting a central (sleep-related) cause in men with SRPE. This implies a local (penile) etiology in men with SP. No sleep pathology was identified in men with SP. They also had significantly higher peak systolic and end diastolic velocities on unstimulated PDU with an abnormal low resistance waveform identified. Men with SP had significantly longer erections (60.0 vs 18.5 p = 0.002) and took longer to detumesce once awake (25.7 vs 5.4 min p = 0.001) than men with SRPE. Abnormal Polysomnographic findings (reduced sleep efficiency, total sleep time, and awake after sleep onset) were identified in both groups suggesting poor sleep. All participants were referred to the sleep disorder clinic to be assessed and consented for overnight polysomnography with simultaneous NPT recording and to complete validated sleep, sexual dysfunction and health-related quality of life questionnaires.

This is a prospective cohort study of 20 participants divided into two groups (Group 1 = SP Group 2 = SRPE ) with bothersome painful nocturnal erections. The aim of this study is to observe common features and differences between men with SP and SRPE based on polysomnography, nocturnal penile tumescence (NPT), and penile doppler ultrasound (PDU). Men with Stuttering Priapism (SP) and sleep-related painful erections (SRPE) experience bothersome nocturnal painful erections resulting in poor sleep.