评估两种用于救援直升机紧急情况下的氧气面罩，特别关注吸气氧分数（FiO2）。

Evaluation of two oxygen face masks with special regard to inspiratory oxygen fraction (FiO2) for emergency use in rescue helicopters.

作者信息

Hinkelbein Jochen, Glaser Eckard

机构信息

Clinic for Anesthesiology and Intensive Care Medicine, Medical Faculty Mannheim, Ruprecht-Karls-University Heidelberg, University Hospital Mannheim, Mannheim, Germany.

出版信息

Air Med J. 2008 Mar-Apr;27(2):86-90. doi: 10.1016/j.amj.2007.07.005.

DOI:10.1016/j.amj.2007.07.005

PMID:18328973

Abstract

INTRODUCTION

Effective oxygenation during acute respiratory insufficiency depends on the inspiratory oxygen fraction (FiO(2)) and the oxygen face mask used. Recent studies demonstrated significant advantages of the Hi-Ox80 mask as compared with a basic mask. The aim of this study was to measure FiO(2) in the laryngopharynx of patients and to apply these data to the setting in rescue helicopters.

METHODS

In spontaneously breathing patients, FiO(2) was measured with an O(2)-sensor (Draeger Medical, Luebeck, Germany) in the laryngopharynx, depending on the adjusted oxygen flow. Flow increments of 1 up to 12 L/min were analyzed using a basic oxygen mask (Intersurgical Ltd., Berkshire, UK) and a Hi-Ox80 mask (Viasys Healthcare GmbH, Hoechberg, Germany) in a randomized order on the same patient. Data were applied to the special helicopter environment and analyzed with respect to oxygen delivery per minute and resulting equipment benefits. Statistika (StatSoft GmbH, Hamburg, Germany) and t-test were used for statistical analysis. P <or= .05 was considered statistically significant.

RESULTS

Twenty patients with a mean age of 69 +/- 7 years were investigated. At a low oxygen flow up to 1 L/min, the Hi-Ox80 mask was not superior to the basic mask (FiO(2) at 1 L/min 24% +/- 3% vs. 27% +/- 5% and partial pressure of arterial oxygen [paO(2)] 164 +/- 68 vs. 193 +/- 53 mmHg; NS). Using a flow of 2 L/min or more, a significant difference for the FiO(2) and paO(2) in both masks was found (P <or= .05). Using the Hi-Ox80 face mask in a rescue helicopter with standard oxygen flows, it demonstrated 3.24 times longer oxygen availability because of a reduced required oxygen flow and therefore a potential calculated weight reduction.

CONCLUSIONS

The Hi-Ox80 mask allows more effective use of the administered oxygen flow. Efficiency of the new mask is greater; hence, similar flow adjustment produces a significantly higher FiO(2). Thus, oxygen, cost, and weight savings are feasible.

摘要

引言

急性呼吸功能不全期间的有效氧合取决于吸入氧分数（FiO₂）和所使用的氧面罩。最近的研究表明，与基本面罩相比，Hi - Ox80面罩具有显著优势。本研究的目的是测量患者喉咽部的FiO₂，并将这些数据应用于救援直升机的环境中。

方法

在自主呼吸的患者中，根据调整后的氧气流量，使用氧气传感器（德国吕贝克德尔格医疗公司）测量喉咽部的FiO₂。在同一患者身上，以随机顺序使用基本氧气面罩（英国伯克希尔因特斯urgical有限公司）和Hi - Ox80面罩（德国赫希贝格威亚希斯医疗有限公司）分析1至12 L/min的流量增量情况。将数据应用于特殊的直升机环境，并就每分钟的氧气输送量和由此产生的设备优势进行分析。使用Statistika（德国汉堡StatSoft有限公司）和t检验进行统计分析。P≤0.05被认为具有统计学意义。

结果

对20名平均年龄为69±7岁的患者进行了研究。在低至1 L/min的氧气流量下，Hi - Ox80面罩并不优于基本面罩（1 L/min时的FiO₂为24%±3%对27%±5%，动脉血氧分压[paO₂]为164±68对193±53 mmHg；无显著性差异）。当使用2 L/min或更高的流量时，发现两种面罩的FiO₂和paO₂存在显著差异（P≤0.05）。在配备标准氧气流量的救援直升机中使用Hi - Ox80面罩时，由于所需氧气流量减少，其氧气供应时间延长了3.24倍，因此在重量上有潜在的减轻计算。