Comparison Of The Fio 2 Delivered By Seven Models Of The Self-inflating Bag-mask System [comparação Da Fio 2 Fornecida Por Sete Modelos De Sistema Balão-máscara Auto-inflável]

BACKGROUND AND OBJECTIVES: Since resuscitators with self-inflating bag-mask systems manufactured and/or commercialized in Brazil are widely available and used in health services, both out- and intra-hospitals, the objective of this study was to determine the O 2 fractions delivered by seven resuscitators receiving different O 2 flows. METHODS: Seven resuscitators with self-inflating bag-mask systems were tested at the Respiratory Unit of the HC/UNICAMP. A wall O 2 flowmeter was connected to the resuscitator that received an O 2 flow of 1, 5, 10, and 15 L.min -1 and those were connected to a test lung. Resuscitators capable of being connected to an O 2 reservoir were tested with and without this accessory. Twenty consecutive measurements were performed and the mean determined. RESULTS: Only one resuscitator delivered and O 2 fraction slightly below the accepted limit (0.80) when used with the O 2 reservoir. Without this device, all resuscitators achieved the minimal limit of O 2 fraction (0.40). Resuscitators not capable of being connected to an O 2 reservoir delivered a higher O 2. CONCLUSIONS: All resuscitators capable of being connected to an O 2 reservoir delivered a higher O 2 concentration when connected to this device. Resuscitators that do not have this capability delivered a higher O 2 concentration than the ones that could be connected to this device but are used without it. © Sociedade Brasileira de Anestesiologia, 2009.5912127Barnes, T.A., McGarry, W.P., Evaluation of ten disposable manual resuscitators (1990) Respir Care, 35, pp. 960-968Mazzolini, D.G., Marshall, N.A., Evaluation of 16 adult disposable manual resuscitators (2004) Respir Care, 49, pp. 1509-1514Carter, B.G., Fairbank, B., Tibballs, J., Oxygen delivery using self-inflating resuscitation bags (2005) Pediatr Crit Care Med, 6, pp. 125-128Boidin, M.P., Mooi, B., Erdmann, W., Controlled administration of oxygen with self inflating resuscitation bags (1980) Acta Anaesthesiol Belg, 31, pp. 157-165Nam, S.H., Kim, K.J., Nam, Y.T., The changes in delivered oxygen fractions using laerdal resuscitator bag with different types of reservoir (2001) Yonsei Med J, 42, pp. 242-246Guidelines of the European Resuscitation Council 2000 on Advanced Adult Life Support - A statement of the Advanced Life Support Working Group as approved by the Executive Committee of the European Resuscitation Council. Anaesthesist, 2002;51:293-298American Heart Association - Guidelines 2000 for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care. Part 7: The era of reperfusion: section 1: Acute coronary syndromes (acute myocardial infarction). Circulation, 2000102 (Suppl 8):I172-I203Tibballs, J., Carter, B., Whittington, N., A disadvantage of self-inflating resuscitation bags (2000) Anaesth Intensive Care, 28, p. 587Maxwell, L.J., Ellis, E.R., The effect on expiratory flow rate of maintaining bag compression during manual hyperinflation (2004) Aust J Physiother, 50, pp. 47-49International Organization for Standardization. International Standard ISO 8382: 1988(E). Resuscitators intended for use with humans. New York, American National Standards Institute, 1988. Disponível em: 〈http://www.iso.org〉. Acessado em 21 de setembro de 2004American Society for Testing and Materials, Standard specification for performance and safety requirements for resuscitators intended for use with humans F-920-85. Philadelphia, Am Soc Testing & Materials, 1993Barnes, T.A., Potash, R., Evaluation of five adults disposable operator-powered resuscitators (1989) Respir Care, 34, pp. 254-261Barnes, T.A., Stockwell, D.L., Evaluation of ten manual resuscitators across an operational temperature range of -18 degrees C to 50 degrees C (1991) Respir Care, 36, pp. 161-172Barnes, T.A., Catino, M.E., Burns, E.C., Comparison of an oxygen-powered flow-limited resuscitator to manual ventilation with an adult 1,000-mL self-inflating bag (2005) Respir Care, 50, pp. 1445-1450Zecha-Stallinger, A., Wenzel, V., Wagner-Berger, H.G., A strategy to optimize the performance of the mouth-to-bag resuscitator using small tidal volumes: Effects on lung and gastric ventilation in a bench model of an unprotected airway (2004) Resuscitation, 61, pp. 69-74Bennett, S., Finer, N.N., Rich, W., A comparison of three neonatal resuscitation devices (2005) Resuscitation, 67, pp. 113-118Turki, M., Young, M.P., Wagers, S.S., Peak pressures during manual ventilation (2005) Respir Care, 50, pp. 340-34