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2008 Design of Medical Devices Conference Abstracts

Retention Of Cardiac Auscultation Skill Requires Paired Visual And Audio Information In New Learners OPEN ACCESS

[+] Author and Article Information
Glenn Nordehn, Spencer Strunic, Tom Soldner, Nicholas Karlisch, Stanley Burns

 Univ. of MN Med. School Duluth, MED 153, 1035 Univ. Drive, Duluth, MN 55812

Ian Kramer

 New York Univ, New York, NY

J. Med. Devices 2(2), 027503 (Jun 10, 2008) (1 page) doi:10.1115/1.2927390 History: Published June 10, 2008

Abstract

Introduction: Cardiac auscultation accuracy is poor: 20% to 40%. Audio-only of 500 heart sounds cycles over a short time period significantly improved auscultation scores. Hypothesis: adding visual information to an audio-only format, significantly (p<.05) improves short and long term accuracy. Methods: Pre-test: Twenty-two 1st and 2nd year medical student participants took an audio-only pre-test. Seven students comprising our audio-only training cohort heard audio-only, of 500 heart sound repetitions. 15 students comprising our paired visual with audio cohort heard and simultaneously watched video spectrograms of the heart sounds. Immediately after trainings, both cohorts took audio-only post-tests; the visual with audio cohort also took a visual with audio post-test, a test providing audio with simultaneous video spectrograms. All tests were repeated in six months. Results: All tests given immediately after trainings showed significant improvement with no significant difference between the cohorts. Six months later neither cohorts maintained significant improvement on audio-only post-tests. Six months later the visual with audio cohort maintained significant improvement (p<.05) on the visual with audio post-test. Conclusions: Audio retention of heart sound recognition is not maintained if: trained using audio-only; or, trained using visual with audio. Providing visual with audio in training and testing allows retention of auscultation accuracy. Devices providing visual information during auscultation could prove beneficial.

Copyright © 2008 by American Society of Mechanical Engineers
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