ABSTRACT
Premature ejaculation is a common male sexual dysfunction disorder, and there are many controversies over its definition. With deeper insights into the etiology and pathogenesis of premature ejaculation, more and more auxiliary examinations are used in its diagnosis, prognostic evaluation and treatment, such as transrectal ultrasonography of seminal vesicles, determination of serum 5-hydroxytryptamine (5-HT) concentration, serum hormone levels, penile sensitivity detection, brain function tests, and genetic sequencing. This review outlines the latest advances in the auxiliary examination of premature ejaculation and provides clinicians with some diagnostic indexes or methods of premature ejaculation for reference.
ABSTRACT
Penile hypersensitivity plays an important role in premature ejaculation (PE), but differences in penile sensitivity among subtypes of PE are unknown. Therefore, we compared penile sensory thresholds in PE subtypes of lifelong and acquired PE, PE with and without erectile dysfunction (ED), PE with an intravaginal ejaculation latency time ≤1 min and >1 min, and PE with and without orgasmic pleasure perceptual dysfunction. During August 2014 to January 2016, 136 patients with PE were included. Penile warm, cold, and vibratory thresholds were measured. Data of clinical characteristics, sexual life, Premature Ejaculation Diagnostic Tool (PEDT) score, and the 5-item version of the International Index of Erectile Function (IIEF-5) score were collected. Vibratory thresholds of the PE with ED group were higher in the right coronal sulcus (median amplitude: 4.92 vs 3.65 μ m, P = 0.02) and the right penile shaft (median amplitude: 3.87 vs 3.30 μ m, P = 0.03), while differences in penile sensory thresholds between other subtypes were not significant. The median PEDT score was lower in the PE without ED group (12 vs 14, P < 0.001). The IIEF-5 and PEDT scores were negatively correlated (r = -0.29, P < 0.001). Patients with orgasmic pleasure perceptual dysfunction had a lower median IIEF-5 score (20 vs 21, P = 0.02). Patients with PE and ED had lower penile sensitivity, and ED was associated with more severe symptoms and weaker orgasmic pleasure perception. In men with PE, management of comorbid ED is necessary. In case of side effects in erectile function, topical anesthetics should be cautiously used in men with PE and ED.
ABSTRACT
Penile hypersensitivity plays an important role in premature ejaculation (PE), but differences in penile sensitivity among subtypes of PE are unknown. Therefore, we compared penile sensory thresholds in PE subtypes of lifelong and acquired PE, PE with and without erectile dysfunction (ED), PE with an intravaginal ejaculation latency time ≤1 min and >1 min, and PE with and without orgasmic pleasure perceptual dysfunction. During August 2014 to January 2016, 136 patients with PE were included. Penile warm, cold, and vibratory thresholds were measured. Data of clinical characteristics, sexual life, Premature Ejaculation Diagnostic Tool (PEDT) score, and the 5-item version of the International Index of Erectile Function (IIEF-5) score were collected. Vibratory thresholds of the PE with ED group were higher in the right coronal sulcus (median amplitude: 4.92 vs 3.65 μ m, P = 0.02) and the right penile shaft (median amplitude: 3.87 vs 3.30 μ m, P = 0.03), while differences in penile sensory thresholds between other subtypes were not significant. The median PEDT score was lower in the PE without ED group (12 vs 14, P < 0.001). The IIEF-5 and PEDT scores were negatively correlated (r = -0.29, P < 0.001). Patients with orgasmic pleasure perceptual dysfunction had a lower median IIEF-5 score (20 vs 21, P = 0.02). Patients with PE and ED had lower penile sensitivity, and ED was associated with more severe symptoms and weaker orgasmic pleasure perception. In men with PE, management of comorbid ED is necessary. In case of side effects in erectile function, topical anesthetics should be cautiously used in men with PE and ED.
Subject(s)
Adolescent , Adult , Humans , Male , Middle Aged , Young Adult , Ejaculation , Erectile Dysfunction/physiopathology , Orgasm , Penis/physiology , Physical Stimulation , Pleasure , Premature Ejaculation/physiopathology , Prospective Studies , Sensory Thresholds , Sexual Dysfunctions, Psychological , Sexuality , Surveys and Questionnaires , Temperature , VibrationABSTRACT
INTRODUCTION: Premature ejaculation is the most prevalent form of male sexual dysfunction, but its cause has not been well established. Recently some studies indicated that penile sensitivity is decreased in men with premature ejaculation. MATERIALS AND METHODS: To clarify the association between penile sensitivity and premature ejaculation, we evaluated penile sensitivity in 18 patients with premature ejaculation without erectile dysfunction and neurologic deficit, and 15 normal potent male volunteers by SMV-5 digital vibrometer (Teknologue, Tokyo, Japan), which has higher precision and reproducibility than analogue type biothesiometers. Vibration thresholds were recorded at the glans penis, penile shaft, and frenulum of the penis in flaccid and erectile state induced by PGE1 10 ug. We also recorded those at ulnar process and medial maleolus of the tibia. RESULTS: There was no difference in vibration threshold at the ulnar process and the medial maleolus of the tibia between the two groups (p>0.05). And we found no difference in penile sensitivity at the glans penis, penile shaft, frenulum of the penis between the two groups, in both erectile and flaccid states (p>0.05). Penile sensitivity was decreased in erectile state compared to flaccid state, but it is not statistically significant (p>0.05). CONCLUSION: Based on our results, penile hypersensitivity measured by SMV-5 vibrometer does not appear to be a major factor contributing to premature ejaculation. And further study aimed at other somatic or cognitive factors awaits implementation.