[abstract]CO TESTING OF AIR SOURCES IN A MULTIPLACE HYPERBARIC CHAMBER

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[abstract]CO TESTING OF AIR SOURCES IN A MULTIPLACE HYPERBARIC CHAMBER

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Title: [abstract]CO TESTING OF AIR SOURCES IN A MULTIPLACE HYPERBARIC CHAMBER
Author: Chin; WC; Debbold; ED; Sprau; S
Abstract: INTRODUCTION/BACKGROUND: The UCLA Hyperbaric Center attained elevated levels of carbon monoxide from a corrective maintenance check on all three air compression units. Ranging from 8.5-13 ppm, these levels were high enough to warrant further investigation, as hyperbaric conditions present special concerns for chronic low-level exposures for repeat patients and inside observers. Long-term, low-level CO exposure can produce headaches, fatigue, muscle aches, photosensitivity, and nausea. Due to the occult nature of the poisoning, these symptoms are often misdiagnosed and attributed to other causes such as allergies, stress or infection. The goal of this study was to examine the CO levels throughout our air-intake system and to develop a standard work-flow for handling elevated CO readings for hyperbaric centers. MATERIALS AND METHODS: Using the GrayWolf Indoor Air Quality Sensor®, five carbon monoxide samples were taken throughout the day from four locations along the air flow. These were the fresh air intake, before and after entry of air into handler, and at the chamber panel. We averaged each sampling group, and looked for any readings that were elevated at levels comparable to those found in the original maintenance check. RESULTS: Our samples yielded the data in Table 1. Contrary to the carbon monoxide levels recorded during the corrective maintenance check, no sample attained carbon monoxide levels greater than 3 parts per million. The inherent variability of the sensor is 1 ppm, so we can conclude that our air intake and handling system is clean. SUMMARY/CONCLUSIONS: The results suggest that the carbon monoxide levels (8.5-13 ppm) attained from the corrective maintenance check were an aberration, and that current levels throughout the air-intake system are safe. As an added precaution, we installed a CO monitor (type: C-Squared Analyzer) at the chamber panel to sample the air from the chamber. These tests are performed once daily while the chamber is at depth. Recommended Process Flow if high carbon monoxide levels are suspected or indicated: E88 – TABLE 1;__________________________________________________;Location, CO, CO, CO, CO, CO, MEAN; (ppm), (ppm), (ppm), (ppm), (ppm); Compressor, 1.4, 1.9, 2.4, 2.8, 2.4, 2.18;__________________________________________________;Panel, 2.3, 3, 2.3, 2.1, 2, 2.34;__________________________________________________; Behind, 2.3, 2, 1.8, 2.3, 2.4, 2.16; handler ;__________________________________________________; Outside 2, 1.4, 1.7, 1.1, 2, 1.64;__________________________________________________;diagram
Description: Undersea and Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc.
URI: http://archive.rubicon-foundation.org/10819
Date: 2013

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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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