Ortiz Tatiana de Arruda, Forti Germano, Volpe Márcia Souza, Beraldo Marcelo do Amaral, Amato Marcelo Britto Passos, Carvalho Carlos Roberto Ribeiro, Tucci Mauro Roberto
University of São Paulo, School of Medicine, São Paulo, Brazil.
J Bras Pneumol. 2013 Sep-Oct;39(5):595-603. doi: 10.1590/S1806-37132013000500010.
To evaluate the performance of manual resuscitators (MRs) used in Brazil in accordance with international standards.
Using a respiratory system simulator, four volunteer physiotherapists employed eight MRs (five produced in Brazil and three produced abroad), which were tested for inspiratory and expiratory resistance of the patient valve; functioning of the pressure-limiting valve; and tidal volume (VT) generated when the one-handed and two-handed techniques were used. The tests were performed and analyzed in accordance with the American Society for Testing and Materials (ASTM) F920-93 criteria.
Expiratory resistance was greater than 6 cmH2O . L-1 . s-1 in only one MR. The pressure-limiting valve, a feature of five of the MRs, opened at low pressures (< 17 cmH2O), and the maximal pressure was 32.0-55.9 cmH2O. Mean VT varied greatly among the MRs tested. The mean VT values generated with the one-handed technique were lower than the 600 mL recommended by the ASTM. In the situations studied, mean VT was generally lower from the Brazilian-made MRs that had a pressure-limiting valve.
The resistances imposed by the patient valve met the ASTM criteria in all but one of the MRs tested. The pressure-limiting valves of the Brazilian-made MRs usually opened at low pressures, providing lower VT values in the situations studied, especially when the one-handed technique was used, suggesting that both hands should be used and that the pressure-limiting valve should be closed whenever possible.
根据国际标准评估巴西使用的手动复苏器（MRs）的性能。
使用呼吸系统模拟器，四名志愿物理治疗师使用了八台MRs（五台巴西生产，三台国外生产），测试其患者阀的吸气和呼气阻力、限压阀功能以及单手和双手操作技术时产生的潮气量（VT）。测试按照美国材料与试验协会（ASTM）F920 - 93标准进行并分析。
仅一台MRs的呼气阻力大于6 cmH₂O·L⁻¹·s⁻¹。五台MRs具备的限压阀在低压（<17 cmH₂O）时打开，最大压力为32.0 - 55.9 cmH₂O。测试的MRs之间平均VT差异很大。单手操作技术产生的平均VT值低于ASTM推荐的600 mL。在所研究的情况下，有压力限制阀的巴西产MRs的平均VT通常较低。
除一台测试的MRs外，患者阀施加的阻力均符合ASTM标准。巴西产MRs的限压阀通常在低压时打开，在所研究的情况下提供较低的VT值，特别是使用单手技术时，这表明应使用双手操作且尽可能关闭限压阀。
