Vargas Maria, Marra Annachiara, Vivona Luigi, Ball Lorenzo, Marinò Valeria, Pelosi Paolo, Servillo Giuseppe
Department of Neurosciences, Reproductive and Odontostomatological Sciences, University of Naples, Federico II, Naples, Italy.
Department of Surgical Sciences and Integrated Diagnostics, San Martino Policlinico Hospital, Istituto di Ricovero e Cura a Carattere Scientifico for Oncology, University of Genoa, Genoa, Italy.
Respir Care. 2018 Aug;63(8):1033-1039. doi: 10.4187/respcare.05930. Epub 2018 May 29.
The aim of this bench study was to investigate the performances of 8 devices for noninvasive CPAP.
Eight devices for noninvasive CPAP with an orofacial mask were studied: Ventumask, Ventumask 30, EasyVent, EasyVent Emergency, Compact Model II, Flowone, Superflow, Boussignac CPAP valve. Each device was tested at oxygen input flows from 5 to 20 L/min, and the output gas flow was measured in static conditions. Each device was evaluated during a eupneic and a tachypneic simulated breathing test.
The gas output flow generated by each device increased with higher oxygen input flow; EasyVent and Flowone produced the highest output flow ( < .001). At the simulated eupneic breathing test, Superflow and EasyVent showed a more stable pressure swing at different PEEP levels, whereas the other masks had a greater swing, between 10 and 15 cm HO PEEP ( = .002 for all pairwise comparisons). During the tachypneic breathing test, the pressure swing was stable with Flowone and EasyVent ( = .055), whereas it had increased with other masks ( = .002 for all pairwise comparisons).
We found a significant variation in the performances of the 8 CPAP devices examined in this study. The technical characteristics and limitations of different CPAP devices should be considered when using in patients with hypoxemic acute respiratory failure.
本实验研究旨在调查8种无创持续气道正压通气（CPAP）设备的性能。
研究了8种带口鼻面罩的无创CPAP设备：Ventumask、Ventumask 30、EasyVent、EasyVent Emergency、Compact Model II、Flowone、Superflow、Boussignac CPAP阀。每种设备在氧气输入流量为5至20升/分钟的条件下进行测试，并在静态条件下测量输出气体流量。每种设备在平静呼吸和快速呼吸模拟测试中进行评估。
每种设备产生的气体输出流量随氧气输入流量的增加而增加；EasyVent和Flowone产生的输出流量最高（P<0.001）。在模拟平静呼吸测试中，Superflow和EasyVent在不同呼气末正压（PEEP）水平下显示出更稳定的压力波动，而其他面罩在10至15厘米水柱PEEP之间波动更大（所有两两比较P = 0.002）。在快速呼吸测试中，Flowone和EasyVent的压力波动稳定（P = 0.055），而其他面罩的压力波动增加（所有两两比较P = 0.002）。
我们发现本研究中检测的8种CPAP设备的性能存在显著差异。在低氧性急性呼吸衰竭患者中使用时，应考虑不同CPAP设备的技术特点和局限性。
