Uitrasonographic Assessment of Erectile Function After Oral Administration of Sildenafil Citrate in Normal Men

XING Jin-fang; DU Lian-fang; LI Hui-feng; LI Fan

Abstract：Objective:To investigate the ultrasonographie indexes in the evaluation of complete penile erection after oral administra- tion of sildenafil citrate in men with normal erectile function.Methods:The subjects lay supine,with the penis raised upwards.its back clinging to the abdomen.The probe was placed at the base of the ventral side of the penis for longitudinal and transverse section scanning.Observations were made on the corpus cavernosum,deep artery and deep dorsal vein of the penis at the time of flaccidity and complete erection after oral administration of sildenafil citrate,respectively. Results:The examinations were acceptable to all the subjeets both physically and psychologically,and all were completed successfully with no complications. Coml:Iared with the flaccid state of the penis,obvious changes were observed in the state of complete erection,including marked increases in the diameter of the corpus cavemosum ([18.57±2.50] mm,increased by[106.8±62.1]%),the inside diameter of the deep artery([1.18±O.26]mm,increased by [54.9+29.O]%),the peak systolic velocity([32.5±10.7]cm/s,increased by [209.3±112.9]%),and the systolic acceleration ([5.71±2.71]cm/s2,increased by [179.3±138.2]%). Conclusion:Oral administration of sildenafil cit-rate followed by uhrasonography is a new approach to the objective evaluation of penile erection,characterized by convenience,safety,non-invasiveness,non-complication,easy acceptability and easy clinical application.