**Question:** Test to differentiate between psychological and organic erectile dysfunction: NEET 13

A. Sexual history and physical examination
B. Penile Doppler ultrasound
C. Response to psychological testing
D. Sexual dysfunction questionnaire

**Correct Answer:** C. Response to psychological testing

**Core Concept:**

Erectile dysfunction (ED) is a clinical syndrome characterized by persistent inability to attain or maintain an erection sufficient for satisfactory sexual intercourse. It is classified into two main types: organic ED (physiological cause) and psychological ED (emotional cause). Differentiating between the two is essential for appropriate management.

**Why the Correct Answer is Right:**

The correct answer, option C, focuses on assessing the patient's response to psychological testing. This is crucial because psychological factors are often involved in the development or exacerbation of organic ED. Psychological testing evaluates the patient's ability to achieve and maintain an erection when distressed or anxious, thus revealing the role of psychological factors in their dysfunction.

**Why Each Wrong Option is Incorrect:**

A. Sexual history and physical examination (option A) are essential components of the initial evaluation but do not specifically differentiate between organic and psychological causes. Physical examination may reveal findings indicative of an organic cause, but it does not definitively confirm or rule out psychological factors.

B. Penile Doppler ultrasound (option B) is a valuable diagnostic tool for investigating organic ED, evaluating blood flow and vascular disease. However, it does not differentiate between organic and psychological causes.

D. Sexual dysfunction questionnaire (option D) is helpful for assessing sexual function and distress but does not differentiate between organic and psychological causes. A questionnaire alone may not provide sufficient information regarding the patient's psychological state during sexual encounters.

**Clinical Pearl:**

To differentiate between psychological and organic ED, a comprehensive approach including psychological evaluation is crucial. Assessing the patient's response to psychological testing allows for a more accurate diagnosis and appropriate treatment plan. In addition, addressing emotional factors in patients with ED can improve treatment outcomes for both organic and psychological cases.