[abstract] BUBBLE DETECTION WITH AN ECHO-IMAGE/DOPPLER COMBINED PROBE VERSUS SEPARATE PROBES: A COMPARISON OF RESULTS.

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[abstract] BUBBLE DETECTION WITH AN ECHO-IMAGE/DOPPLER COMBINED PROBE VERSUS SEPARATE PROBES: A COMPARISON OF RESULTS.

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Title: [abstract] BUBBLE DETECTION WITH AN ECHO-IMAGE/DOPPLER COMBINED PROBE VERSUS SEPARATE PROBES: A COMPARISON OF RESULTS.
Author: Webb, JT; Olson, RM; Baas, CL; Hill, RC
Abstract: The ability to monitor a subject for intravascular bubbles during decompression using precordial Doppler and 2-D echo-imaging in a single probe offers the advantage of simultaneous visual and audio observation. This advantage should result in better detection and fewer false negatives (cases where decompression sickness. DCS. occurred without detection of bubbles). Better methods of bubble detection should increase understanding of the bubble-DCS relationship. Records of decompression exposures from ground level to simulated altitudes of 22,500 and 25,000 ft from combined probes (112 subject exposures) or separate probes (65 subject exposures) have provided information on the sensitivity and specificity of each method. Sensitivity is defined here as the number of bubblers who had DCS divided by the total number with DCS. With separate probes. the sensitivity was 79% (31/39) and with the combined probes, the sensitivity was 90% (36/40). Specificity is defined here as the number of bubble-free subjects without DCS divided by the total number of subjects without DCS. The specificity was 33% (9/27) with separate probes and 31% (22/72) with combined probes. The combined probe allows higher sensitivity as a result of fewer false negatives compared to the single probes. The greater detection capability with the combined probe also increases the number of false positives (cases where bubbles were detected but DCS did not occur). While this refinement in equipment reinforces the theory that those who exhibit DCS also have bubbles, it does little to refine the value of bubble detection as a tool for DCS prediction. (UHMS SPON: JE Touhey)
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held 6-11 June 1989. Hawaiian Regent Hotel, Honolulu, Hawaii, USA (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/6798
Date: 1989

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  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

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