[abstract] INTRAVASCULAR DOPPLER-DETECTED BUBBLES AND DECOMPRESSION SICKNESS.

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[abstract] INTRAVASCULAR DOPPLER-DETECTED BUBBLES AND DECOMPRESSION SICKNESS.

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Title: [abstract] INTRAVASCULAR DOPPLER-DETECTED BUBBLES AND DECOMPRESSION SICKNESS.
Author: Sawatzky, KD; Nishi, RY
Abstract: The relationship between intravascular bubbles as detected by Doppler monitoring and the subsequent development of decompression sickness (DCS) has been the subject of debate for many years. This presentation summarizes the findings after analysis of the 3000+ mandives with postdive Doppler monitoring that have been conducted at DCIEM during the last 10 years. The DCIEM procedure consists of monitoring the precordial region. the left and the right subclavian veins at rest and after a specified movement. The signals are evaluated according to the Kisman-Masurel Code. The records of all mandives with a history of post dive symptoms were reviewed by a diving physician blinded to the Doppler scores and categorized as DCS or not DCS according to a system developed by Canadian Forces and United States Navy diving physicians for use in the analysis of historical diving data. The data were divided into two groups (air-N202 and He02) and several analyses were carried out on each group. In the first analysis traditional comparisons between the incidence of DCS and Doppler scores for the chest at rest and after movement were perfonned. In the second analysis the cases of DCS were divided into three groups: DeS in the left shoulder and arm, DeS in the right shoulder and arm and the remainder (DCS in the legs and type II DeS). The Doppler scores in the shoulders were compared with the cases of DCS in the ipsilateral shoulder or arm while the Doppler scores in the chest were compared to the cases of Type II and leg DCS. For the final method of analysis the single highest Doppler score (regardless of location, at rest or after movement) was used to represent each mandive. This single score was then compared to all cases of DCS. The chest Doppler score was high (grade 2, 3 or 4) in 70-80% of the total cases of DCS and over 95% of the cases of Type II /leg DCS. The shoulder Doppler scores did not relate to the cases of DCS in the ipsilateral ann but the single highest Doppler score was grade 3 or 4 in 55/62 cases ofDCS (there were a total of 794 mandives with a score of 3 or 4). The data support the conclusion that increasing numbers of intravascular bubbles are closely associated with an increasing risk of developing DCS, especially when the single highest bubble score is used.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Joint Annual Scientific Meeting with the International Congress for Hyperbaric Medicine and the European Undersea Biomedical Society held 11-18 August 1990. Okura Hotel, Amsterdam, The Netherlands (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/6939
Date: 1990

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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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