While the patient is sleeping, the HOLTER box will record the times, persistent period, rigidity, length, circumference of penis when it erects and the change of blood volume. The corresponding images of diagnostic result can be created automatically by connecting with computer, to help doctors fix on the erectile dysfunction style of the patient, which is the most effective method to distinguish psychological erectile dysfunction and organic erectile dysfunction.
Diagnosis and treatment of male sexual function disorders has important significance in the research and clinical in China has caused widespread concern. 1965, Dr. Fisher first time to report states: "Men in deep sleep during penile erection signal NPT (nocturnal penile tumescence) and rapid eye movement signals have good correlation." Both signals occur simultaneously in most cases, this is normal healthy men. 1970, Karacan also think: NPT signal can be used as diagnostic indicators of male impotence syndrome. This became the foundation for the world's impotence diagnosis. Nearly three decades. Clinical practice has proved its significance.
Adult health man is turn up 2 to 10 times NPT signal waveform changing waveform in evening. Generally, in process of sleeping, the NPT signal turn up for less times at beginning, it will get more and more. Impotence can be divided into psychological importance, organic impotence (including vascular, neurological, the traumatic of endocrine etc impotence.), drug-induced impotence and senility impotence. The proportion of psychological impotence is largest, it’s more than 65%. NPT signal has been considered for the most intuitive and reliable to distinguish between psychological impotence and other symptoms of the patient. It is widely used in clinical and scientific research.\
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f) Force majeure.
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