Male Erectile Dysfunction

Sadeghi‐Nejad, Hossein; Brison, Daniel; Dogra, Vikram S.

doi:10.1016/j.cult.2007.01.005

Cited by 2 publications

(7 citation statements)

References 53 publications

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“…In this study, we investigated continuous assessment of cavernosal arterial waveforms of patients with ED in comparison with its routine Doppler evaluation. The conventional method of post ICI of papaverine color Doppler study includes recording PSV and EDV values in the cavernosal artery spectral waveform 5 minutes after injection which is repeated every 5 minutes afterward up to 30 minutes ( 1 , 4 ). We found that in most patients (92.2%), maximum PSV happened before the fifth minute.…”

Section: Discussionmentioning

confidence: 99%

“…Four stages are defined for a process of penile erection. They are filling, tumescence, rigidity and full erection ( 1 , 3 , 4 , 8 ). It is obvious that these events will result in a sequence of changes in the waveform of cavernosal artery.…”

Section: Discussionmentioning

confidence: 99%

“…Diagnostic criteria are based mostly on the peak systolic velocity (PSV) and end diastolic velocity (EDV) values of the cavernosal artery spectral waveform that were first measured 5 minutes after injection and then repeated every 5 minutes afterward up to 30 minutes (1-4). However, erection is a multi-stage neurovascular phenomenon that needs the fine balance of contractile properties of trabecular smooth muscles in the CC.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays color Doppler study of corpus cavernosum (CC) with intracavernosal injection (ICI) of vasoactive agents is the first step to investigate etiologic causes of male erectile dysfunction (ED) ( 1 , 2 ). Diagnostic criteria are based mostly on the peak systolic velocity (PSV) and end diastolic velocity (EDV) values of the cavernosal artery spectral waveform that were first measured 5 minutes after injection and then repeated every 5 minutes afterward up to 30 minutes ( 1 - 4 ). However, erection is a multi-stage neurovascular phenomenon that needs the fine balance of contractile properties of trabecular smooth muscles in the CC.…”

Section: Introductionmentioning

confidence: 99%

“…However, erection is a multi-stage neurovascular phenomenon that needs the fine balance of contractile properties of trabecular smooth muscles in the CC. It consists of these phases: filling, congestion, rigidity and full erection ( 1 ). Noteworthy to know is that in most of the patients, maximum PSV happens in the first 5 minutes; moreover, in a minority of patients all the process of changes happen in the first 5 minutes ( 5 ).…”

Section: Introductionmentioning

confidence: 99%

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How Can a Radiologist Reveal More Practical Information Using Dynamic Study of Cavernosal Artery After Injection of Vasoactive Agents?

Bagheri

Gharib

2014

Iran J Radiol

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Background:Erection is a dynamic multi-stage neurovascular phenomenon consisting of 4 phases. Conventional protocol of color Doppler study can easily overlook these ongoing dynamic events.Objectives:Here, we tried to designate patterns for these dynamic spectral waveform changes of cavernosal arteries in patients with erectile dysfunction and subsequently better describe the extent of their underlying problem.Patients and Methods:We evaluated 59 men who were referred for post-intracavernosal injection (ICI) color Doppler investigation of suspected erectile dysfunction (ED). The demographic data and medical history were recorded. Afterwards, first scan injection was done. Then scanning of cavernosal arteries was started about one minute after the injection and was continued thereafter. For better description of temporal changes in the waveform of cavernosal arteries, new patterns were defined and used. Patients were also classified based on previously known etiologic categories (i.e. arterial insufficiency, venous leak, mixed type, and normal response).Results:The mean age was 45.6 ± 13.1 (24 to 74 ) years. Twenty-two were normal responders [considered as non-organic causes (37.3% of all patients)], 27 were classified as venous leakage, eight had arterial insufficiency and two were mixed type. Maximum PSV occurred before the fifth minute in 47 patients (92.2%). Eight patients completed all phases of erection in the first 5 minutes. We defined 8 patterns for the temporal changes in cavernosal arterial waveform. Pattern 5 was the most common pattern of venous leak; while, patterns 3 and 4 were considered as the uncommon group. Six patients demonstrated the uncommon patterns of venous leak (22.2%). Hypertension was more prevalent in the uncommon pattern of venous leak.Conclusions:We highlight the considerable role of continuous evaluation starting one minute after intra cavernosal with ICI injection of the vasoactive agent for better description of the underlying pathologies of ED especially in patients with venous leak etiology.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

How Can a Radiologist Reveal More Practical Information Using Dynamic Study of Cavernosal Artery After Injection of Vasoactive Agents?

Bagheri

Gharib

2014

Iran J Radiol

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Parámetros hemodinámicos en el proceso normal de la erección

Arcila

2015

Urología Colombiana

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Erección peneana; Disfunción eréctil; Ultrasonografía doppler; Impotencia vasculogénica; Anatomía del pene Resumen El proceso normal de la erección tiene 6 fases hemodinámicas definidas: flaccidez, erección latente (pre-erección), tumescencia, erección máxima, rigidez y detumescencia. Durante este proceso ocurren cambios en la dilatación de la arteria cavernosa, aumento del flujo sanguíneo pudendo, de la presión intracavernosa y de la presión al final de la diástole; estos cambios se reflejan a su vez en el índice de resistencia, concentración de oxígeno y el grado de erección, que es la representación clínica de todo el proceso. El flujo sanguíneo pudendo debe aumentar sin limitaciones hasta que se produce el fenómeno de la venoclusión que precede a la rigidez, lo que es la clave del sistema para ahorrar energía manteniendo una erección adecuada con el mínimo gasto de sangre. Cada una de las fases mencionadas tiene también una representación durante la ecografía doppler de pene, lo que convierte a las imágenes ultrasonográficas en una herramienta costo efectiva para el diagnóstico adecuado de diferentes problemas vasculares que afectan la hemodinamia normal.

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Male Erectile Dysfunction

Cited by 2 publications

References 53 publications

How Can a Radiologist Reveal More Practical Information Using Dynamic Study of Cavernosal Artery After Injection of Vasoactive Agents?

How Can a Radiologist Reveal More Practical Information Using Dynamic Study of Cavernosal Artery After Injection of Vasoactive Agents?

Parámetros hemodinámicos en el proceso normal de la erección

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