The Science Journal of the American Association for Respiratory Care

1995 OPEN FORUM Abstracts

EVALUATION OF ADULT DISPOSABLE AND NONDISPOSABLE MANUAL RESUSCITATION BAGS

Jeff Carlson, RRT; Jim Granzo, RRT; Butterworth Hospital, Grand Rapids, Michigan

This evaluation of adult manual resuscitation bags (MRB) was designed to assess delivered O2 (FDO2) utilizing the clinical potential of each resuscitator. Method: Bag design and attached reservoir were not altered from manufacturer setup. Testing was not intended to follow American Society of Testing and Materials (ASTM) standards F-920-85. Each resuscitator was tested with a lung model (Michigan Instruments, TTL) and monitored by computerized testing (Michigan Instruments, PneuView). FDO2 was measured with a fuel cell oxygen analyzer (Catalist Research, Mini-Ox III). Oxygen flow at 15 L/Min used for the evaluation was established with a calibration analyzer (Timeter, RT200). Two hand method of ventilation was used to perform the testing at a constant frequency (f) of 20 b/min.

Results: FDO2 measurements varied with reservoir types. Wide variation in FDO2 were dependent on tidal volume (V_T) and minute ventilation (V_E) capabilities of each resuscitator (Table 1). Conclusion: This study evaluated MRBs to replace our current nondisposable and disposable resuscitators. While the resuscitation bags tested meet ASTM requirements, we feel actual clinical practice is not limited to the testing standard guidelines. In our institution, Respiratory Care Practitioners (RCP) are frequently called upon to provide respiratory support to critical patients by means of manual resuscitators. High FDO2 and V_E requirements are critical issues when evaluating and assessing adult manual resuscitation bags. V_E requirements > 15 L/min may be achieved by several resuscitators at a f of 20 b/min. Reservoir types and V_E capabilities impact the FDO2. Various resuscitators provide high FDO2. We feel the poly bag (PB) reservoir is a beneficial feature that allows the RCP to observe and assess adequate O2 flow. Accumulators (AT) and large bore tubing (LBT) do not facilitate this bedside assessment.

Table 1

MRBReservoir FDO2 V_E L/min

Gibeck PB.59 25.8±1.2

RuschPB.65 25.1±1.3

Ambu PB.78 24.6±0.7

Hudson PB.72 24.4±2.1

Intertech PB.83 21.6±1.5

Baxter PB.76 21.3±1.3

Pulmanex PB.76 20.9±0.9

VS--VB PB.48 20.8±1.8

Baxter AT.69 24.4±0.9

DMR AT.67 24.0±2.6

Intertech AT.76 20.4±1.8

VL--OldAT.80 18.8±1.4

VL--NewAT.71 18.5±1.3

PMR - 2AT.79 15.5±1.1

RuschLBT .67 19.8±0.6

Intertech LBT .70 19.0±0.6

VS--CB LBT .84 17.9±1.2

LaerdalLBT .75 17.5±1.1

VS--VB LBT .91 17.1±1.7

OF-95-115

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