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The OxyArm™ Delivers Oxygen as Effectively as Nasal  Cannula in Chronic Hypoxic Patients

James E. Paul, M.D., F.R.C.P.C.; Elizabeth Ling, M.D., F.R.C.P.C.; Julius Hujgato; Lee McDonald, R.N. Anesthesia, McMaster University, Hamilton, Ontario, Canada

Introduction: The OxyArm™ (Southmedic, ON) is a new non-invasive oxygen (O2) delivery system based on a modified hands-free telecommunications design. Features include a headband with a flexible boom, directing O2 to the mouth and nose through an O2 diffuser. The purpose of this pilot study was to compare pulse oximetry values in chronic hypoxic adults receiving O2 at various flow rates via the OxyArm™ and nasal cannula. Patient preference and comfort were also assessed.

Methods: After informed consent, 5 adults were prospectively studied in a randomized single-blind cross-over design. Inclusion criteria included: adults > 18 years, long-term home O2 therapy, baseline O2 saturation ≤ 94%. Those with acute respiratory infection or unstable vital signs were excluded. Patients were randomized to receive either the OxyArm™ or nasal cannula. Baseline oximetry was recorded after breathing room air for 15 min while sitting. Oximetry values were obtained with the first device after 10 min of O2 therapy at 2, 4, 6, and 8 L/min. A washout period on room air returned patients to their baseline value after each period of O2 therapy. This procedure was repeated for the second O2 delivery device. Oximetry values were recorded digitally and the assessor was blinded to the O2 device used. Patients were asked which device was more comfortable and their overall preference. Data was analyzed using a two-way analysis of variance.

Results: Five adults (M/F=2/3, ASA 3-4, age 72 ± 6.6) all-using home O2 for at least 1 year were studied. Pulse oximetry values increased significantly from baseline at all O2 flow rates (Fig. 1) with both the OxyArm™ and nasal cannula (P<0.0001). The device used to deliver O2 did not significantly influence the O2 saturations (P=0.647). All subjects preferred the OxyArm™ for comfort and overall preference. Conclusions: Both the OxyArm™ and nasal cannula are effective for O2 delivery for adults requiring O2 supplementation. The OxyArm™ may be an attractive alternative to the nasal cannula since it is non-invasive and can be used in mouth or nose breathers. Further research is ongoing.

Study supported by Southmedic, Inc.

Anesthesiology 2002; 96: A567
Figure 1

Source: Copyright © 2006, American Society of Anesthesiologists. All rights  reserved.