[abstract] OXYGEN DELIVERY SYSTEMS DURING PATIENT TREATMENT AT TWO ATA.

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[abstract] OXYGEN DELIVERY SYSTEMS DURING PATIENT TREATMENT AT TWO ATA.

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Title: [abstract] OXYGEN DELIVERY SYSTEMS DURING PATIENT TREATMENT AT TWO ATA.
Author: Doar, PO; Boso, AE
Abstract: Oxygen delivery is an important aspect of hyperbaric oxygen therapy. In this study, the performance of two oxygen delivery systems was compared at two (2) atmospheres absolute (ATA): the Duke Semi-closed Circuit Rebreathing System (DSCC) and a modified Single Pass Oxygen Delivery System (SPOD). Approximate flow rates were 56 lpm for the DSCC and 50 lpm for the SPOD system. Oxygen (02) and carbon dioxide (C02) levels were monitored via sample lines from the exhaust side of each system in 210 patient treatments. 108 treatments were monitored using the semi-closed system and 102 treatments with the single pass system. During the 2 hour treatments, 02 and C02 levels were recorded at thirty (30) minute intervals. Episodes involving interruption of oxygen delivery were also recorded. The modified SPOD system delivered higher inspired mean oxygen levels (98.8% ± 0.3% vs. 98.5% ± 0.6% mean ± SD, P <'0.0001). The DSCC rebreathing system resulted in lower mean carbon dioxide levels (0.235% ± 0.068% vs. 0.329% ± 0.086% mean ± SD, P < 0.0001). The mean oxygen concentration rose and, leveled off early during the treatments in both systems, while the mean carbon dioxide fell in the SPOD system and tended to rise in the recirculating system at consecutive thirty (30) minute sample points. Oxygen delivery interruptions were evaluated for possible relationship to oxygen toxicity. Three oxygen interruptions were recorded for the DSCC and one for the SPOD system. None of the interruptions appeared to be related to oxygen toxicity. The data demonstrate that while differences in inspired oxygen and carbon dioxide levels exist between the two oxygen systems, both systems are safe and effective for high oxygen delivery (i.e. above 98% 02) and low carbon dioxide levels (i.e. below 1.0% CO2 surface equivalent) at 2 ATA.
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/7179
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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