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Related Concept Videos

Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...
Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors01:28

Treatment for Pulmonary Arterial Hypertension: Phosphodiesterase Inhibitors

Phosphodiesterase 5 (PDE5) inhibitors are potent enzymes that function to hydrolyze cyclic nucleotides to their corresponding 5' monophosphates. Their unique biochemical properties have been applied in treating Pulmonary Arterial Hypertension (PAH).
Among the PDE5 inhibitors, sildenafil (Revatio) stands out as a competitive and selective inhibitor. It operates by elevating cellular levels of cGMP and augmenting signaling through the cGMP-PKG pathway, promoting vasodilation. Upon oral...
Urodynamic Studies: Uroflowmetry01:19

Urodynamic Studies: Uroflowmetry

Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...
Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment01:08

Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment

Hepatic impairment, characterized by decreased liver function, does not uniformly mandate adjustments in drug dosage. Whether dosage modifications are necessary depends on various factors related to the drug's metabolism and elimination pathways. If a drug is primarily excreted via the kidneys and bypasses significant hepatic processing, if it undergoes minimal metabolic transformation in the liver, or if it is volatile and primarily expelled through the lungs, dose adjustments may not be...
Urologic Endoscopic Procedure: Cystoscopic Examination01:28

Urologic Endoscopic Procedure: Cystoscopic Examination

Meaning of Cystoscopic Examination:Cystoscopy is an essential diagnostic tool in urology that is used to assess the structure and function of the genitourinary system. It provides a direct view of the urethra, bladder, and, in some cases, the ureteral openings. This procedure helps detect structural abnormalities, infections, cancers, and blockages in the urinary tract. There are two types of cystoscopy:Flexible cystoscopy is commonly performed in outpatient settings due to its less invasive...

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Related Experiment Video

Updated: May 17, 2026

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents
08:03

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents

Published on: June 6, 2018

Investigation of erectile dysfunction.

D V Patel1, J Halls, U Patel

  • 1Department of Clinical Radiology, St George's Hospital, Blackshaw Road, London, UK. dhruvpatel1979@gmail.com

The British Journal of Radiology
|November 3, 2012
PubMed
Summary
This summary is machine-generated.

Erectile dysfunction (ED) is a common condition with physical causes. Penile Doppler sonography (PDS) is the most informative imaging technique for investigating ED when oral treatments fail.

Related Experiment Videos

Last Updated: May 17, 2026

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents
08:03

Intracavernosal Pressure Recording to Evaluate Erectile Function in Rodents

Published on: June 6, 2018

Area of Science:

  • Urology
  • Radiology
  • Andrology

Background:

  • Erectile dysfunction (ED) is a prevalent and impactful condition with diverse origins.
  • Physical causes of ED involve arterial inflow, venous occlusion, or penile structural issues.

Purpose of the Study:

  • To review the anatomical and physiological underpinnings of penile erection.
  • To detail the methodology and findings of penile Doppler sonography (PDS) for ED.
  • To explore alternative imaging modalities for diagnosing ED.

Main Methods:

  • Penile Doppler sonography (PDS) is highlighted as the primary diagnostic tool.
  • The review examines the technique for performing PDS.
  • Comparison with other available imaging modalities is discussed.

Main Results:

  • PDS is indicated for patients with ED unresponsive to oral medications like phosphodiesterase type 5 inhibitors.
  • The review covers specific physical causes of ED detectable via PDS.
  • Understanding PDS findings aids in diagnosing the physical etiology of ED.

Conclusions:

  • Penile Doppler sonography is crucial for diagnosing physical causes of erectile dysfunction.
  • This review provides a comprehensive guide to PDS in the context of ED.
  • Accurate diagnosis through PDS facilitates targeted treatment strategies for ED.