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Characterizing the Range of Simulated Prostate Abnormalities Palpable by Digital Rectal Examination by Leigh A. Baumgart; Gregory J. Gerling; Ellen J. Bass is a Medicine article available to read on EtoBox.

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## Background: Although the digital rectal exam (dre) is a common method of screening for prostate cancer and other abnormalities, the limits of ability to perform this hands-on exam are unknown. perceptible limits are a function of the size, depth, and hardness of abnormalities within a given prostate stiffness. ## Methods: To better understand the perceptible limits of the dre, we conducted a psychophysical study with 18 participants using a custom-built apparatus to simulate prostate tissue and abnormalities of varying size, depth, and hardness. utilizing a modified version of the psychophysical method of constant stimuli, we uncovered thresholds of absolute detection and variance in ability between examiners. ## Results: Within silicone-elastomers that mimic normal prostate tissue (21kpa), abnormalities of 4mm diameter (20mm(3) volume) and greater were consistently detectable (above 75% of the time) but only at a depth of 5mm. abnormalities located in simulated tissue of greater stiffness (82kpa) had to be twice that volume (5mm diameter, 40mm(3) volume) to be detectable at the same rate. ## Conclusions: This study finds that the size and depth of abnormalities most influence d

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Author

Leigh A. Baumgart; Gregory J. Gerling; Ellen J. Bass

Publisher

Elsevier ; Elsevier BV (ISSN 1877-7821)

Published

2010

Language

EN

Field

Medicine (Health Sciences)