Dysfonction érectile après prostatectomie totale : physiopathologie, évaluation et traitement

The effects of trimetazidine and sildenafil on bilateral cavernosal nerve injury induced oxidative damage and cavernosal fibrosis in rats

AIM

The aim of this study was to compare the effects of sildenafil and trimetazidine on bilateral cavernosal nerve injury-induced oxidative damage and fibrotic changes in cavernosal tissue in rat model.

MATERIAL AND METHODS

A total of 32 male Sprague-Dawley rats were randomly divided into 4 groups; each group consist 8 rats (control, BCI, BCI + TMZ, and BCI + sildenafil groups). Tissue superoxide dismutase (SOD), malondialdehyde (MDA), and protein carbonyl (PC) levels were determined biochemically and distribution of cavernosal fibrosis density among groups was performed histopathologically.

RESULTS

Tissue SOD levels in BCI group were significantly lower than the control group (P < 0.05). Tissue MDA and PC levels in BCI group were significantly higher than the control group (P < 0.05). TMZ and sildenafil administration significantly increased tissue SOD levels (P < 0.05) and reduced tissue MDA and PC levels (P < 0.05). Histologically, the degree of cavernosal fibrosis and collagen density was higher in BCI group in comparison to control, TMZ-treated, and sildenafil-treated groups.

CONCLUSION

BCI caused oxidative damage and increased cavernosal fibrosis in rat penis. TMZ and sildenafil treatment decreased oxidative damage and reduced the degree of fibrosis in penile tissue due to BCI.

[Initial experience combinating transobturator male sling and penile implant after radical prostatectomy]

PURPOSE

Stress urinary incontinence (SUI) and erectile dysfunction (ED) are two major complications following radical prostatectomy (RP). In case of failure of medical treatment, Advance™ retrourethral male sling and penile implant are validated options to manage respectively SUI and ED. Our goal was to assess the feasibility and results of the combination of these two devices.

PATIENTS AND METHODS

Four patients were treated for SUI and DE following RP in our institution by retrourethral sling and penile prosthesis, after failure of medical management. Each patient was preoperatively evaluated by age, complete medical history, ASA score, endoscopy, pad-test, and urodynamics. The first two patients were implanted with the two devices in a two-stage procedure: retrourethral sling then penile prosthesis for one, and penile prosthesis then retrourethral sling for the other. The two other patients underwent a one-stage procedure: one received the two devices, and the other had retrourethral sling implantation and replacement of a penile prosthesis. Post-operative follow-up was focused on complications and efficacy (evaluated by pad use and PGI-I questionnaire for continence, and patient auto-evaluation for sexual function).

RESULTS

No perioperative complication occurred. After a minimum of 6 months follow-up, all the four patients were pad-free with no leakage reported, feeling very much better after the procedure according to the PGI-I. The four patients were fully satisfied of the penile implant device.

CONCLUSIONS

According to our initial experience, surgery combining the transobturator Advance male sling and a penile prosthesis is feasible, successively or simultaneously, and leads to excellent functional results with no complications.

[Modification of sexual desire and orgasm after radical prostatectomy for prostate cancer]

OBJECTIVES

To assess the impact of RP on patients' sexual desire and orgasm.

MATERIAL AND METHODS

Prospective, cross-sectional survey using a 16-item self-administered questionnaire. We assessed relevant domains of male sexual function (erectile function, sexual desire, and orgasm), psychological impact and treatment of ED.

RESULTS

A total of 63 consecutive patients after RP were included (mean age: 63.9). Median time between questionnaire and RP was 26.8 months (range 6-67). After RP, 74.6 % of patients used ED treatments. Lower sexual desire and intercourse frequency were reported in respectively 52.4 and 79.4 %. Orgasm was modified in most patients: 39.7 % described loss of orgasm and 38.1 % reported decreased intensity. Involuntary loss of urine at orgasm (climacturia) was reported in 25.4 %. Negative psychological impact was reported in 68.3 % (loss of self-esteem, loss of masculinity, anxiety).

CONCLUSIONS

RP adversely affected erectile and orgasmic functions but also sexual desire, self-esteem and masculinity despite treatments. Candidates for RP should be aware of ED but also of other postoperative sexual dysfunctions.