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Evidence based assessment of erectile dysfunction

G A Broderick1

  • 1University of Pennsylvania Health Systems, Philadelphia 19104, USA.

International Journal of Impotence Research
|July 2, 1998
PubMed
Summary

Diagnosing impotence requires identifying the cause, classifying severity, and choosing appropriate therapy. This review outlines diagnostic tests for erectile dysfunction, including nocturnal penile tumescence studies and hemodynamic evaluations.

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Area of Science:

  • Urology
  • Andrology
  • Diagnostic Medicine

Background:

  • Erectile dysfunction (ED) necessitates a thorough etiological assessment, including vascular, neurologic, and psychosexual factors.
  • Accurate diagnosis is crucial for effective treatment selection and patient management.
  • Understanding the underlying pathology guides therapeutic strategies for impotence.

Purpose of the Study:

  • To review and outline the commonly utilized diagnostic tests for evaluating erectile dysfunction (ED).
  • To discuss the principles and limitations of various diagnostic modalities for impotence.
  • To provide a comprehensive overview of current diagnostic approaches in andrology.

Main Methods:

  • Nocturnal penile tumescence (NPT) studies, including stamp tests, strain gauges, and Rigiscan (NPTR).
  • Neurophysiological assessments like somatosensory evoked potentials (SSEP) and bulbocavernosus reflex latency (BCR).
  • Hemodynamic evaluations such as Doppler sonography, dynamic infusion cavernosometry/cavernosography (DICC), and penile blood flow studies (PBFS).

Main Results:

  • Nocturnal penile tumescence and rigidity (NPTR) assesses neurovascular integrity but has limited value in classifying vascular impotence.
  • Pharmacotesting (intracavernous injection) is a common, minimally invasive ED diagnostic tool, indicating normal veno-occlusion but not necessarily normal arterial function.
  • Duplex Doppler assessment and penile blood flow studies (PBFS) offer objective evaluation for suboptimal pharmacotesting responses.

Conclusions:

  • A systematic approach to impotence testing is essential for accurate diagnosis and tailored treatment.
  • No single test is sufficient; a combination of NPT, neurophysiological, and hemodynamic assessments may be required.
  • Advanced diagnostic tools like penile EMG and Doppler ultrasound improve the differentiation of ED etiologies.

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