Related Experiment Video
Updated: Sep 14, 2025

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents
Published on: June 6, 2018
Clinical value of spontaneous cavernous activity evaluation in identifying misdiagnosed corporal venous occlusive
Zizhou Meng1, Haowei Bai1, Shiyun Liu1
1Clinical Medical Center of Urology, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Background:
Previous studies have indicated that corporal venous occlusive dysfunction (CVOD) may be misdiagnosed in some patients with psychogenic erectile dysfunction (ED), as the observed venous leakage could actually reflect cavernous smooth muscle (CSM) relaxation failure due to sympathetic overactivity. Misdiagnosed CVOD can lead to inappropriate treatment decisions, such as unnecessary penile venous surgery or reliance solely on phosphodiesterase type 5 inhibitors (PDE5i), overlooking the need for psychogenic interventions. Therefore, it is important to identify the misdiagnosis of CVOD. Corpus cavernosum electromyography (CC-EMG) offers unique insights into the autonomic and myogenic integrity of CSM. This retrospective analysis aimed to evaluate the clinical value of spontaneous cavernous activity (SCA) assessment in identifying misdiagnosed CVOD in psychogenic ED.
Methods:
The study enrolled 168 ED patients who underwent comprehensive evaluation using color duplex Doppler ultrasound (CDDU) and CC-EMG-based SCA assessment (amplitude and duration). Psychogenic ED was confirmed through nocturnal penile tumescence and rigidity (NPTR) monitoring. CVOD patients identified by CDDU were stratified into two subgroups based on NPTR results: psychogenic ED group (misdiagnosed CVOD) and organic ED group (actual CVOD).
Results:
The cohort comprised 69 cases (41.1%) of non-vascular ED (NVED), 67 cases (39.9%) of CVOD, 15 cases (8.9%) of arterial ED (AED), and 17 cases (10.1%) of mixed ED (MED). Among CVOD patients, 30 cases were classified as misdiagnosed CVOD and 37 as actual CVOD. Comparative analysis demonstrated that the SCA parameters were significantly higher in the misdiagnosed CVOD group compared to those of the actual CVOD group, with notable differences in amplitude (305.65±196.79 vs. 172.07±86.36 µV, P=0.002) and duration (3.31±1.94 vs. 2.36±1.26 s, P=0.046). Receiver operating characteristic (ROC) curve analysis demonstrated an area under the curve (AUC) of 0.666 [P=0.02, 95% confidence interval (CI): 0.503-0.830] for SCA amplitude, with an optimal cutoff of 357.50 µV yielding 94.7% specificity and 55.0% sensitivity, indicating its potential predictive value for identifying misdiagnosed CVOD in psychogenic ED.
Conclusions:
The findings suggested that elevated SCA may contribute to CVOD development in psychogenic ED through impaired CSM relaxation due to sympathetic overactivity. SCA assessment might be a useful diagnostic tool for identifying misdiagnosed CVOD in psychogenic ED. However, given the modest AUC, along with high specificity but low sensitivity of SCA parameters for diagnosing misdiagnosed CVOD, further research is needed to identify additional clinical parameters with better predictive performance.
More Related Videos
Related Concept Videos
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
Assessment of the Cardiovascular System III: Palpation
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above...
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
Angina III: Clinical Manifestations and Assessment
Disorders of the Male Reproductive System
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra....
Assessment of the Cardiovascular System I: Subjective Data
Initial Enquiry
Ask the patient about their primary concern and thoroughly explore all reported symptoms.
Medical History
Investigate past illnesses affecting the cardiovascular system, such as angina, anemia, rheumatic fever, congenital heart disease, stroke, thrombophlebitis, dysrhythmias, varicosities
Inquire about symptoms...

