[abstract] ONSET AND RECOVERY OF VENOUS GAS EMBOLI FROM EACH LIMB AND ASSOCIATION WITH HYPOBARIC DECOMPRESSION ILLNESS

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[abstract] ONSET AND RECOVERY OF VENOUS GAS EMBOLI FROM EACH LIMB AND ASSOCIATION WITH HYPOBARIC DECOMPRESSION ILLNESS

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Title: [abstract] ONSET AND RECOVERY OF VENOUS GAS EMBOLI FROM EACH LIMB AND ASSOCIATION WITH HYPOBARIC DECOMPRESSION ILLNESS
Author: Foster, PP; Conkin, J; Powell, MR
Abstract: BACKGROUND: Pain symptom in a limb may be related to presence and persistence of bubbles in the circulation of musculoskeletal and articular soft tissues (ligaments, tendons, synovial). The hypothesis is that onset, duration and recovery of precordial venous gas emboli (VGE) presumably mobilized from a limb, is associated with "pain-only" decompression illness (DCI) in this limb. METHODS: VGE were detected with a Doppler ultrasound device after flexing the joints of a limb; time to onset and recovery of Spencer grades (every 16 minute intervals) and location of pain were reported for 517 NASA hypobaric exposures. The durations of various bubble grades are compared for subjects with and without DCI. RESULTS: The mean duration of bubble grade IV is shorter in the arms (left: 24 min, right: 29 min) than in the legs (left: 69 min, right: 63 min); the statistical significance was assessed by the t-test (left arm vs. left leg, P less than 0.0001; right arm vs. right leg, P less than 0.0003). The mean duration of bubble grade IV in upper limbs is also shorter than mean duration of bubble grade I (95 min, P less than 0.0008), and II (70 min, P less than 0.02). Persistence of VGE III and IV in a lower limb is highly correlated with the presence of DCI in the same limb: Duration:Left Leg:Right Leg (min)::DCI:No DCI:P-value:DCI:No DCI:P-value VGE III:41:10:0.03:48.6:10.7:0.001 VGE IV:67:7.1:0.00001:60.5:7.9:0.0000001 CONCLUSION: Persistence of bubble grade IV and III from the lower limbs may explain the ratio of cases with leg pain (67) vs. arm pain (17). However, the majority of exercises during the 517 exposures was restricted to the upper limbs with an average metabolic rate of 200 Kcal/h.
Description: Undersea and Hyperbaric Medical Society, Inc. (http://www.uhms.org )
URI: http://archive.rubicon-foundation.org/341
Date: 1997

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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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