Is There a Role for Vascular Surgery in the Contemporary Management of Erectile Dysfunction?

Erectile dysfunction management is intended to restore capacity for penile erection. Although effective, none of the currently available treatments approved by the US Food and Drug Administration reverse erectile dysfunction pathophysiology. Penile arterial bypass surgery is intended to restore erectile function without the need for the chronic use of vasoactive medications or penile prosthesis placement. In select cases, venous ligation surgery may be beneficial, but this approach is not supported by the most recent guidelines on erectile dysfunction management. The lack of high-quality research surrounding penile vascular surgery has limited its use.

Erectile Dysfunction Resistant to Medical Treatment Caused by Cavernovenous Leakage: An Innovative Surgical Approach Combining Pre-operative Work Up, Embolisation, and Open Surgery.

OBJECTIVE: Thirty per cent of cases of erectile dysfunction (ED)/male impotence are resistant to oral treatment. Half of these cases are due to blood drainage from the corpora cavernosa occurring too soon, due to cavernovenous leakage (CVL). The aim of this study was to report on an innovative treatment scheme combining pre- and post-operative haemodynamic assessment, venous embolisation, and open surgery for drug resistant ED caused by CVL. METHODS: An analysis of prospectively collected data, with clinical and haemodynamic pre- and post-operative assessment, was carried out. Forty-five consecutive patients operated on for drug resistant ED caused by CVL were evaluated pre-operatively and three months post-operatively by pharmacologically challenged penile duplex sonography (PC-PDS), pharmacologically challenged Erection Hardness Score (PC-EHS), and pharmacologically challenged computed caverno tomography (PC-CCT). Follow up consisted of patient interview, PC-PDS, PC-EHS and if needed PC-CCT. RESULTS: Mean patient age was 43.9 ± 12.0 years (range 20-67). Forty-nine per cent of patients had primary ED. Patients with diabetes, a smoking habit, hypercholesterolaemia, and hypertension were 18%, 11%, 9%, and 4%, respectively. Three months post-operatively, PC-EHS increased from 2.0 ± 0.7 to 3.1 ± 0.74 (p < .001), with an EHS of 3 being the threshold allowing for penetration. Deep dorsal vein velocity, a haemodynamic marker of CVL, decreased from 14.2 ± 13.0 to 0.9 ± 3.5 cm/s (p < .001). After a 14.0 ± 10.7 month follow up, the primary success rate (clinical EHS ≥ 3, possible sexual intercourse with penetration, no vascular re-operation, no penile prosthesis implant) was 73.3%. Four patients (9%) underwent successful re-operation for persistent ED and CVL. Accordingly, compared with a possible penetration rate of 8.9% before surgery, 37 patients (secondary success rate: 82.2%) were able to achieve sexual intercourse with penetration. Type of ED (primary vs. secondary) and diabetes had no influence on the results. Thirty-two per cent of patients with secondary success achieved penetration with no medication. CONCLUSIONS: After a 14 month follow up, pre-operative work up, embolisation, and open surgery during the same procedure allowed patients with ED resistant to oral medical to achieve intercourse with penetration.

Epidemiology regarding penile prosthetic surgery.

With the onset of a metabolic syndrome epidemic and the increasing life expectancy, erectile dysfunction (ED) has become a more common condition. As incidence and prevalence increase, the medical field is focused on providing more appropriate therapies. It is common knowledge that ED is a chronic condition that is also associated with a myriad of other disorders. Conditions such as aging, diabetes mellitus, hypertension, obesity, prostatic hypertrophy, and prostate cancer, among others, have a direct implication on the onset and progression of ED. Characterization and recognition of risk factors may help clinicians recognize and properly treat patients suffering from ED. One of the most reliable treatments for ED is penile prosthetic surgery. Since the introduction of the penile prosthesis (PP) in the early seventies, this surgical procedure has improved the lives of thousands of men, with reliable and satisfactory results. The aim of this review article is to characterize the epidemiology of men undergoing penile prosthetic surgery, with a discussion about the most common conditions involved in the development of ED, and that ultimately drive patients into electing to undergo PP placement.

Computed tomography cavernosography combined with volume rendering to observe venous leakage in young patients with erectile dysfunction.

OBJECTIVE:: To observe the venous leakage of penile veins through cavernosometry and cavernosography, using CT combined with three-dimensional volume rendering. METHODS:: 186 consecutive erectile dysfunction patients (20-40 years old) with suspected venous leakage diagnosed by clinicians were enrolled. All patients underwent intracavernous injection of vasoactive agents combined with Doppler ultrasound to identify venous leakage. RESULTS:: Taking intracavernous injection combined with Doppler ultrasound as the "gold-standard", 47/186 (25.3%) patients had negative venous leakage, and 139/186 (74.7%) patients had positive venous leakage. CT cavernosography showed that 22/139 (15.8%) cases were isolated deep dorsal vein or crural vein leakage, and 117/139 (84.2%) cases were complex venous leakage. Three types of deep dorsal vein were seen: single-branch 42/139 (30.2.%), double-branch 45/139 (32.4%), and complex 31/139 (22.3%). Three types of prostatic venous plexus were seen: single-branch 26/139 (18.7%), multiple-branch 36/139 (25.9%), and plexus 39/139 (28.1%). A total of 166 crural veins were revealed in 129 patients. Crural veins had three origins: medial dorsal side (112/166, 67.5%), lateral ventral side (30/166, 18.1%) and the curs tip (24/166, 14.4%). CONCLUSION:: To achieve the expected success rate of ligation surgery or endovascular embolization, candidates for the procedures should be carefully selected through CT cavernosography, which can provide elaborate images and information about the venous leakage. ADVANCES IN KNOWLEDGE:: A modified evaluation method was used in this study to monitor the intracavernous pressure during examination. New classifications of the deep dorsal vein, prostatic venous plexus and crural vein are described in this study.

Abnormal deep dorsal vein resulting in veno-occlusive erectile dysfunction.

A 59-year-old man with a 6-year history of erectile dysfunction presented to the andrology outpatient clinic. Multimodality assessment with ultrasound, MRI venography and fluoroscopic venography demonstrated an aberrant emissary vein arising from the corporal bodies causing venogenic erectile dysfunction. Selective coil embolisation of the collateral vein resulted in an almost immediate and sustained improvement in his erections.

[Penile revascularization using laparoscopic mobilization of the inferior epigastric artery].

The article presents a case of successful penile revascularization using laparoscopic mobilization of the inferior epigastric artery in a 35 y. o. patient with penile arteriovenous insufficiency.

Herb formula enhances treatment of impotent patients after penile venous stripping: a randomised clinical trials.

Herbs have been regarded as aphrodisiacs in treating impotence for many centuries despite little true scientific evidence. Our latest refined penile venous stripping (PVS) technique is effective in treating impotence, although this procedure remains controversial. A synergic effect of PVS and oral herbs was confirmed in our practice but lacked rigorous scientific proof. The objective of this report was to review our experience with this combination. From August 2010 to May 2014, 263 males underwent PVS. Among these, 67 unsatisfied men chose additional salvage therapy and were randomly assigned to oral herbs (n = 35) or placebo treatment (n = 32) which replaced herb eventually. All were evaluated with the international index of erectile function (IIEF-5) scoring and our dual pharmaco-cavernosography. The pre-op IIEF-5 score for the herb group was 9.7 ± 3.7, post-operative 13.9 ± 3.3 and post-herb 19.6 ± 3.4, while the control group scores were as follows: pre-op 9.3 ± 4.1, post-op 14.5 ± 3.6, post-placebo 15.1 ± 3.5 and post-herb 19.9 ± 3.2. Although there was no significant difference between the two groups pre-operatively, post-operatively and post-herb, a statistically significant difference was found post-salvage therapy (19.6 ± 3.4 versus 15.1 ± 3.6, P < 0.001). It appears that the combination of oral herbs and PVS treatment provides an enhanced outcome to impotent patients refractory to medicine and unsatisfied with PVS monotherapy alone.

A critical analysis of candidacy for penile revascularization.

INTRODUCTION: Penile revascularization (PR) is a potentially curative procedure for young men with isolated arteriogenic erectile dysfunction. Standard preoperative evaluation is erectile hemodynamics (HDX) using duplex Doppler penile ultrasound (DUS) and/or cavernosometry (DIC) and assessment of cavernosal arterial anatomy by selective internal pudendal arteriography (SIPA). AIM: The aim of this study was to review our experience with men who sought a second opinion from us regarding their candidacy for PR. METHOD: Study population consisted of men (i) who presented to us for a second opinion regarding PR; (ii) who had DUS/DIC and SIPA; and (iii) had been advised by outside surgeon to undergo PR. Review of the HDX study and SIPA was conducted. Discrepancies between these studies resulted in repeating the DIC in men with normal SIPA or repeating the SIPA in men with normal HDX studies. MAIN OUTCOME MEASURES: Discrepancies between HDX and SIPA and the results of repeat HDX or SIPA were the main outcome measures. RESULT: Forty-five patients participated in the study; mean age was 33 years with 4% ≥50 years old. Median vascular risk factor number was 1 (ranged 0-3). A credible trauma history was present in 11%. Thirty-three percent had prior DIC and 49% of patients had a significant discrepancy between HDX study and SIPA, including all patients seen by a community urologist. Thirty-eight percent had a discrepancy between side of abnormality on HDX and SIPA where both studies were abnormal (group A). Seven percent had abnormal HDX and normal SIPA (group B). Four percent had a normal HDX study with an abnormal SIPA (group C). Repeat DIC (n = 20) was conducted in groups A + B and was normal in 70% of cases. Repeat SIPA (n = 2) was conducted in group C and was normal in both patients. CONCLUSION: Almost one half of patients had a significant discrepancy between HDX and SIPA. Of these, 73% had normal repeat studies, making them no longer candidates for penile revascularization.

Pressure Ulcer Scale for Healing no acompanhamento da cicatrização em pacientes idosos com úlcera de perna / Pressure Ulcer Scale for Healing in monitoring of wound healing in elderly patients with leg ulcer

Introdução: Este trabalho objetiva descrever a evolução da cicatrização e o tratamento realizado em pacientes com úlceras de perna no ambulatório de feridas, utilizando o instrumento Pressure Ulcer Scale for Healing - PUSH. Métodos: Trata-se de pesquisa na modalidade estudo de caso, realizada com quatro pacientes. Os dados foram colhidos em um Hospital Estadual do interior de São Paulo, nos anos 2009 e 2010, por meio de fotografias digitais e da escala de evolução de feridas Pressure Ulcer Scale for Healing. Os itens avaliados são: área da ferida, quantidade de exsudato e aparência do leito da ferida. Resultados: Na primeira avaliação, o primeiro caso apresentava escore total 16; o segundo e o terceiro casos, escore total 13; e o quarto caso, escore total 15. Na segunda avaliação, o primeiro caso apresentava escore total 13; o segundo, escore total 7; o terceiro, escore total 6; e o quarto, escore total 11. Na última avaliação, o primeiro caso apresentava escore total 4 e no segundo, terceiro e quarto casos, o escore total foi zero. A aplicação da Escala Pressure Ulcer Scale for Healing na avaliação dos 4 pacientes deste estudo possibilitou aos enfermeiros realizar a prescrição da cobertura ideal para o processo cicatricial da lesão. Conclusão: Concluiu-se que o referido instrumento facilita sobremaneira a atuação da enfermagem na avaliação e na escolha da cobertura ideal para a promoção da epitelização da lesão, uma vez que tem por base a avaliação de parâmetros importantes durante o processo dinâmico do cuidar de feridas.

Introduction: This work describes the evolution of wound healing and outpatient treatment of patients with leg ulcers using the Pressure Ulcer Scale for Healing (PUSH) tool. Method: This research was performed as a case study with four patients. The data were gathered at a State Hospital in the countryside of the State of São Paulo from 2009 to 2010 through digital photographs and the PUSH wound evolution scale. The wound area, amount of exudate and appearance of the wound bed were assessed. Results: In the first assessment, the first case presented with a total score of 16; the second and third cases, 13; and the fourth case, 15. In the second assessment, the first case presented with a total score of 13; the second, 7; the third, 6; and the fourth, 11. In the last assessment, the first case presented a total score of 4, and the second, third and fourth cases, 0. The application of the PUSH to assess the four patients in this study allowed nurses to perform the optimal wound dressing prescribed for the healing process. Conclusion: It was concluded that the aforementioned tool greatly facilitates nursing performance in assessing and choosing the optimal dressing to promote the epithelialization of the wound, which is based on the assessment of important parameters during the dynamic process of wound care.

Penile revascularization--contemporary update.

Contemporary therapies for erectile dysfunction are generally targeted towards older men and universally engage pharmacological and/or device related treatment options. Penile revascularization, using microvascular arterial bypass surgical techniques, is a non-pharmacological, non-device-related, and reconstructive surgical strategy for men with erectile dysfunction that was first described by Dr Vaclav Michal in 1973. Contemporary penile revascularization attempts to 'cure' pure arteriogenic erectile dysfunction in young men with arterial occlusive pathology in the distal internal pudendal, common penile or proximal cavernosal artery secondary to focal endothelial injury from blunt pelvic, perineal or penile trauma. A microvascular anastomosis is fashioned between the donor inferior epigastric and recipient dorsal penile artery. Increased perfusion pressure is theoretically communicated to the cavernosal artery via perforating branches from the dorsal artery. This article will review the history, indications and pathophysiology of blunt trauma-induced focal arterial occlusive disease in young men with erectile dysfunction, current surgical techniques utilized and results of surgery. Contemporary use of penile revascularization is a logical and wanted therapeutic option to attempt to reverse erectile dysfunction in young men who have sustained blunt pelvic, perineal or penile trauma.

Standard operating procedures for vascular surgery in erectile dysfunction: revascularization and venous procedures.

INTRODUCTION: The impact of penile blood supply on erectile function was recognized some 500 years ago. At the turn of the 20th century first results of penile venous ligation were published and in 1973 the first surgical attempts to restore penile arterial inflow were undertaken. Numerous techniques were published in the meantime, but inclusion criteria, patient selection, and success evaluation differed extremely between study groups. AIM: To develop evidence-based standard operating procedures (SOPs) for vascular surgery in erectile dysfunction, based on recent state of the art consensus reports and recently published articles in peer-reviewed journals. METHODS: Based on the recent publication of the consensus process during the 2009 International Consultation on Sexual Medicine in Paris, recommendations are derived for diagnosis and surgical treatment of vascular erectile dysfunction. In addition several recent publications in this field not mentioned in the consensus statements are included in the discussion. MAIN OUTCOME MEASURE: The Oxford system of evidence-based review was systematically applied. Due to the generally low level of evidence in this field expert opinions were accepted, if published after a well-defined consensus process in peer-reviewed journals. RESULTS: Referring to penile revascularization it may be concluded, that in the face of missing randomized trials, only recommendations grade D may be given: this kind of surgery may be offered to men less than 55 years, who are nonsmokers, nondiabetic, and demonstrate isolated arterial stenoses in the absence of generalized vascular disease. The evidence level for recommendations concerning penile venous ligations may be even lower. Too many unsolved controversies exist and universal diagnostic criteria for patient selection as well as operative technique selection have not been unequivocally established. This kind of surgery is still considered investigational but may be offered in special situations on an individualized basis in an investigational or research setting after obtaining written consent, using both pre- and postoperatively validated measuring instruments of success evaluation. CONCLUSIONS: SOPs for penile revascularization procedures can be developed, concerning a highly selected patient group with isolated arterial stenoses. Based on the available data it is not yet possible to define SOPs for surgical treatment of corporal veno-occlusive dysfunction.

[Application of methods of angiosurgery for the treatment of venogenic erectile dysfunction].

The article presents the results of the use of alternative method of treatment--endovascular occlusion of the prostatic plexus--in patients with isolated venogenic erectile dysfunction. The IIEF-5 and AMS questionnaires were used for the evaluation of results of the operation. Improvement of quality of erection in the first 3 months after surgery was achieved in the majority of patients. The use of this innovative technology provides secure, minimally invasive and pathogenetically justified treatment of ED caused by abnormal venous drainage from the cavernous bodies.

Erectile function significant enough for penetration during sexual intercourse after removal of inflatable penile prosthesis.

INTRODUCTION: Fifty-two-year-old male with history of multiple insults to his erectile tissue, including insertion and removal of penile implant, presents with significant partial erectile function, substantial enough for anal penetration during sexual intercourse. AIM: Erectile function rigid enough for anal penetration, let alone any erectile function after removal of an inflatable penile prosthesis (IPP), is rare. This article, to our knowledge, is the first case of a patient who has undergone multiple insults to his erectile tissue, including an episode of ischemic priapism followed by implantation and removal of an IPP, who presents with erectile function sufficient enough for coitus. MAIN OUTCOME MEASURES: Outcome measured via standardized patient questionnaires and penile Doppler following injection of Trimix. METHOD: An objective measure of the patient's erectile function was performed via penile Doppler. RESULTS: Penile Doppler after 10-mcg injection of Trimix revealed numerous perforating vessels from the corpora spongiosum providing blood flow to the corpora cavernosa. The patient obtained approximately 60-70% rigid erection. CONCLUSIONS: To our knowledge, and after thorough review of the literature, we could not find any reports of erectile function significant enough to take part in sexual intercourse and penetration after removal of a three-piece IPP. The implant usually disrupts the normal anatomy which allows for cavernosal arterial vasodilation and increased blood flow into the corpora. Following dilation of the corpora the cylinders are inserted and inflated, and the smooth muscle that makes up the corpora cavernosum is compressed against the wall of the tunica albuginea. Theoretically, the remaining smooth muscle tissue may retain some of its physiologic function, adding some additional girth to the penis with an already activated IPP during sexual intercourse.

Penile revascularization in vasculogenic erectile dysfunction (ED): long-term follow-up.

OBJECTIVE: To determine the overall long-term success of penile revascularization surgery in the treatment of vasculogenic erectile dysfunction (ED) and also to investigate the effect of risk factors on the results of a modified Furlow-Fisher technique. PATIENTS AND METHODS: Between 1999 and 2010, 125 men with a mean (sd, range) age of 43.2 (11.3, 23-69) years underwent penile revascularization surgery. In all, 110 men completed the long-term follow-up with a mean follow-up of 73.2 months. Diagnostic evaluations, penile colour Doppler ultrasonography, corpus cavernosum electromyography, and cavernosometry, were performed in all the men before surgery. The efficacy of the surgery was assessed as improvement or failure according to the change in the five-item version of the International Index of Erectile Function (IIEF-5). A ≥5 point increase in the IIEF-5 score during the latest patient visit after surgery compared with that before surgery was regarded as improvement (surgical success). RESULTS: The mean (SD) IIEF-5 score was 7.3 (3.2) before surgery and at the end of the follow-up period it was 16.8 (3.1). The success rates were 81.8% at 3 months, 77.2% at 1 year, 70% at 2 years, 66.3% at 3 years and 63.6% at 5 years after surgery in the men who achieved a no-ED threshold score of >26 in the IIEF-15. The success rate was the highest in the men with no risk factors (92.8%). Seven patients (6.36%) showed signs of glans hypervascularization as a major complication. CONCLUSIONS: Penile revascularization surgery has not been widely used by urologists probably due to the technical difficulties and the use of phosphodiesterase type 5 inhibitors. However, with reported high rates of noncompliance or failure of oral pharmacotherapy it seems likely that this surgery will become more popular in the near future.

Erectile function and sexual satisfaction before and after penile prosthesis implantation in radical prostatectomy patients: a comparison with patients with vasculogenic erectile dysfunction.

INTRODUCTION: Patients with erectile dysfunction (ED) after radical prostatectomy (RP) may benefit from penile prosthesis (PP) implantation after failure of less invasive treatments. Aim. To assess surgical outcomes and satisfaction after PP implantation in RP patients and compare the results with those in patients with vasculogenic ED (controls). METHODS: A database of 415 consecutive PPs (January 1996-December 2008) was used to collate data on preimplantation ED treatments, surgical complications, satisfaction, and International Index of Erectile Function (IIEF) scores before and 3 months after implantation. The results for 90 post-RP implants (79 primary, 11 secondary) and 131 implants for vasculogenic ED were compared. MAIN OUTCOME MEASURES: The main outcome measures of this study are intra- and postoperative complications and IIEF domain scores. RESULTS: Mean follow-up of RP patients was 37.6 ± 26.8 months. Mean interval between RP and PP implantation was 31.5 ± 28.7 months. Nearly all primary implants (96.2%) were inflatable (3-piece, 70.1%; 2-piece, 24.1%). There was no significant difference between groups in terms of rates of infection (1.1%), mechanical failure (3.3%), and other surgical complications requiring revision surgery (migration, auto-inflation) (4.4%). For primary implants, the mean preimplantation IIEF score (all items) was significantly lower in RP patients than in controls (14.7 ± 5.9 vs. 22.6 ± 10.8, P = 0.003), chiefly because of significantly lower scores for erectile function, intercourse satisfaction, and orgasmic function. After PP implantation in RP patients, the scores for all domains improved, but the total score remained significantly lower than in controls (63.1 ± 7.0 vs. 68.5 ± 6.9, P = 0.005). The orgasmic function score was significantly lower (P < 0.001). Overall satisfaction rate was 86.1% in RP patients and 90.7% in controls (P = 0.3). CONCLUSIONS: PP implantation after RP is associated with low morbidity and high satisfaction. It improves the scores for all IIEF domains and, in particular, erectile function. Fibrosis of the retropubic space may require a second incision for reservoir placement or implantation of a 2-piece PP.

Outcomes of crural ligation surgery for isolated crural venous leak.

INTRODUCTION: Venous ligation surgery results for diffuse venous leak have been disappointing, although in isolated crural venous leak (ICVL) cases, efficacy for crural ligation surgery (CLS) has been demonstrated. AIM: The purpose of this study was to present our experience with treatment of ICVL with CLS. METHODS: All patients underwent preoperative cavernosometry. Cavernosography (CG) or perineal compression (PC) was used to define the diagnosis of ICVL. If CG demonstrated ICVL or flow-to-maintain values normalized with PC, the patient was counseled regarding CLS. Baseline and postoperative erectile function (EF) was assessed by the International Index of Erectile Function (IIEF) questionnaire. MAIN OUTCOME MEASURES: EF, using the EF domain (EFD) score of the IIEF, a domain with six questions with a maximum score of 30 and a minimum score of 6 in the sexually active male. All patients completed the questionnaire preoperatively and in a serial fashion after surgery at a time point after 12 months postoperatively. RESULTS: 14 patients underwent CLS. Mean age was 29 ± 7 years. Also, 64% had primary erectile dysfunction. Mean baseline IIEF-EF score was 18 ± 6. Furthermore, 71% of patients had failed phosphodiesterase type 5 (PDE5) inhibitors and 6/10 (60%) failed intracavernosal injections (ICI). Mean postoperative EFD score was 24 ± 3 representing a mean change of 6.5 points per patient. No patient needed ICI after CLS; however, 4/14 patients needed PDE5 inhibitors, all of whom had been using ICI preoperatively. In addition, 71% experienced unassisted sexual intercourse after CLS. CONCLUSIONS: In a highly selected population of young men with ICVL, CLS cures 70% and improves EF in more than 90% of men. Surgical treatment of ICVL by CLS can be performed safely and with sufficient efficacy that larger and longer term studies should be undertaken.

Tunica albuginea reefing: a novel technique for the treatment of erectile dysfunction.

BACKGROUND: "Tunica albuginea (TA) reefing" is a modification of Shafik's "TA overlapping" operation. Both techniques are based on the fact that in venogenic erectile dysfunction patients, the TA exhibits degenerative and atrophic collagen and elastic fibers causing its subluxation and flabbiness. This had led to loss of the veno-occlusive mechanism of the TA and venous leakage during erection. AIM: Reefing of the redundant tissue by bilateral excision of an ellipse of the TA provides a more effective correction of the TA and achieves a good support of the corpora cavernosa during tumescence. MATERIAL AND METHODS: The study included 24 patients with a mean age of 33.5 ± 1.7 SD years. Intracorporal pressure was measured preoperatively and postoperatively. After penile degloving, an ellipse was excised from both lateral aspects of the penile shaft, extending from the glans penis to its root, and the two edges of each wound were reefed by continuous Dexon suture. RESULTS: The TA ellipses were taken as biopsies and revealed degenerative changes when stained with hematoxylin and eosin and Masson's trichrome stain. Postoperatively, there was an intracorporal pressure increase (p < .01) in 20 out of 24 patients of the study and a decrease in 4 out of 24. Six months after operation, the patients showed significantly (p < .01) improved scores for the domain of erectile function over the preoperative scores. CONCLUSION: The reefing operation corrects the TA flabbiness to a greater extent, lends more support to corporal tissue, and improves the veno-occlusive mechanism.

Three-dimensional CT cavernosography: reconsidering venous ligation surgery on the basis of the modern technology.

OBJECTIVE: • To examine the feasibility of three-dimensional (3D) CT cavernosography in the diagnosis of corporal veno-occlusive dysfunction. PATIENTS AND METHODS: • The subjects were 55 patients who had failed to respond to phosphodiesterase type 5 inhibitors. We performed pharmacodynamic infusion cavernosometry and cavernosography, using 60 mg papaverine hydrochloride. • Cavernosography was performed at 90 mmHg intracavernous pressure, using a multi-slice CT scan system. The 3D images were reconstructed using aquarius net station, ver.2 computer software. • For comparison with conventional cavernosography, maximum intensity projection (MIP) images were used. A flow of 20 mL/min or being more capable of maintaining 90 mmHg of intracavernous pressure indicated veno-occlusive dysfunction. RESULTS: • Forty-five of the 55 patients were diagnosed with corporal veno-occlusive dysfunction. 3D-CT cavernosography revealed drainage veins in all 45 cases, including cavernous veins, dorsal veins, crural veins and other emissary veins. • Compared with 3D-CT cavernosography, observing cavernous veins and the proximal part of the deep dorsal veins using MIP imaging was especially difficult because the origins of the penile veins are often behind the pelvic bone or cavernous body. • Of the patients who seemingly had leakage via the deep dorsal vein, 80.6% did not in fact have leakage via this vein, but had other leakages. The image resolution of 3D-CT cavernosography was significantly higher than that of MIP. CONCLUSION: • 3D-CT cavernosography can provide high-resolution images of venous drainage from any angle. We conclude that the images obtained by 3D-CT cavernosography are very helpful for both the diagnosis of corporal veno-occlusive dysfunction and the anatomical study of the human penile venous system.