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Physiologic analyzers that determine male sexual arousal by measuring and evaluating erectile events and/or penile tumescence. These analyzers may consist of mechanical electroimpedance or ultrasound sensors for measuring the circumferential volumetric, and/or blood-volume penile changes; they may collect data during diurnal tests or while recording the nocturnal sleep erection cycle. Erection/tumescence analyzers typically are used in the diagnosis of erectile dysfunction (impotence), especially in the differentiation between psychogenic versus organic impotence.
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