The Science Journal of the American Association for Respiratory Care

1998 OPEN FORUM Abstracts

EVALUATION OF TWO ADULT DISPOSABLE MANUAL RESUSCITATORS.

Thomas A Barnes, EdD, RRT, Sarah K Melville, Stephanie A Masick, Kimberly A Santos, Christine M MacLellan BS RRT, Department of Cardiopulmonary Sciences, Northeastern University, Boston, Massachusetts.

We evaluated the performance and safety of two disposable manual resuscitators: DMR2 (Nellcor-Puritan Bennett), and Adult Manual Resuscitator (Baxter Healthcare). Method: We used standards and methods approved by American Society for Testing and Materials (F 920-93, ASTM Committee on Standards, Philadelphia, 1993) and International Organization for Standardization (ISO 8382:1988E, New York, 1988). A Bio-Tek VT-1 Ventilator Tester was used as a lung model with C=0.02 L/cm H_{2}O [0.20L/kPa] and R=20 cm H_{2}O.s.L^{-1} (2 kPa.s.L^{-1}). Results: the DMR2 and Baxter resuscitator met ASTM and ISO standards for V_{T} (600 mL), f (20/min), and I:E ( < 1:2). The ASTM and ISO standards specify an FDO_{2} of >= 0.85 with O_{2} reservoir and O_{2} flow of 15 L/min and V_{E} of 7.2 L/min (V_{T} 600 mL, f 12/min). DMR2 and Baxter resuscitator with wide-bore tube O_{2} reservoirs in the collapsed storage position had a FDO_{2}, mean (SD), of 0.65 (0.02), 0.72 (0.02), respectively. When tested with collapsible wide-bore O_{2} reservoirs fully extended or with bag-type or small bore O_{2} reservoirs both DMR2 and Baxter resuscitators passed the FDO_{2} specification. When tested with simulated vomitus both DMR2 and Baxter resuscitators were able to be restored to proper function within 20 seconds. Both DMR2 and Baxter resuscitators passed tests for O_{2} flow of 30 L/min, forward and backward leakage, and 10-second immersion-in-water, expiratory resistance, and inspiratory resistance. The DMR2 failed the drop test from 1 meter. The DMR2 passed and the Baxter resuscitator failed the specification for user manual. DMR2 and Baxter resuscitators were subject to accidental disassembly. Conclusions: The DMR2 and the Baxter resuscitators were in substantial compliance with ASTM and ISO requirements but failed one or more specfications. We recommend the following: that a brightly colored label reading "EXTEND BEFORE USE" be placed on the large-bore oxygen reservoirs of the DMR2 and Baxter resuscitators; that the FDO_{2} delivered by resuscitators with large bore O_{2} reservoirs in the collapsed position be included in user manual; that the 15mm/22mm patient connection of the DMR2 be permanently affixed to the patient valve port and manufactured from material that is shock resistant.

The 44th International Respiratory Congress Abstracts-On-DiskĀ®, November 7 - 10, 1998, Atlanta, Georgia.

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