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Related Experiment Videos

Predicting penile size during erection.

J Chen1, A Gefen, A Greenstein

  • 1Department of Urology, Tel Aviv-Sourasky Medical Center, Tel Aviv 64239, Israel.

International Journal of Impotence Research
|June 21, 2001
PubMed
Summary
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Predicting erect penile size is possible using flaccid measurements. The ratio of flaccid to stretched penile length, under specific tension, accurately estimates erect penile length, potentially avoiding injections.

Area of Science:

  • Urology
  • Andrology
  • Biomedical Engineering

Background:

  • Accurate prediction of erect penile size is crucial for clinical assessments.
  • Current methods, like intracavernosal injections, can be invasive.
  • Identifying reliable clinical parameters for predicting penile size is needed.

Purpose of the Study:

  • To identify clinical and engineering parameters of the flaccid penis for predicting erect penile size.
  • To develop an engineering model for optimizing penile stretching during clinical evaluation.
  • To assess the feasibility of obviating intracavernosal injections for penile length estimation.

Main Methods:

  • Prospective study involving 55 patients.
  • Measurement of penile lengths and circumferences in flaccid, stretched, and erect states.

Related Experiment Videos

  • Utilized a custom gauge to measure stretching forces and developed an engineering model.

    • Main Results:

    • The ratio of flaccid to stretched penile length was the best predictor of ventral elongation.
    • Engineering analysis indicated a minimal tension force of approximately 450g is required for optimal stretching.
    • Clinical stretching forces were significantly lower than the optimal value (P<0.01).

    Conclusions:

    • Relative and absolute elongations of the stretched penis reliably estimate maximal erect length.
    • The developed engineering model may eliminate the need for intracavernosal injections.
    • Penile size prediction can be improved using specific stretching parameters and measurements.