Capital and Coast District Health Board, Private Bag 7902, Wellington, New Zealand.
Resuscitation. 2013 Mar;84(3):391-4. doi: 10.1016/j.resuscitation.2012.08.330. Epub 2012 Sep 3.
To investigate whether titration of inspired oxygen can be achieved through adjustment of oxygen flow into a self-inflating resuscitation bag with a reservoir of a type used in standard ambulance practice.
In a series of bench experiments, oxygen was delivered via a flow metre to a 1500 ml self-inflating resuscitation bag with a 2500 ml reservoir bag and connected to a test lung. The oxygen concentration delivered to the test lung by manual inflation of the resuscitation bag was measured using an anaesthetic machine while the delivered tidal volume was measured using a respirometer. The delivered oxygen concentration was measured at flows of 0.5, 2, 6, 12 and 15 l min(-1) for tidal volumes of 300, 600, and 900 ml with bag inflation rates of 10, 20 and 30 min(-1).
A wide range of delivered oxygen concentrations ranging between 24% and 99.5% were achieved with different oxygen flows, tidal volumes, and inflation rates. Overall, the mean delivered oxygen concentration increased significantly with each of the increments of oxygen flow tested (p<0.001 for all comparisons).
Effective titration of oxygen delivery can be achieved using adjustment of oxygen flow with a standard self-inflating resuscitation bag and reservoir.
研究通过调节带有标准救护车中使用的储气囊的自充式复苏袋中的氧气流量，是否可以实现吸入氧气的滴定。
在一系列的台架实验中，通过流量计将氧气输送到一个带有 2500ml 储气囊的 1500ml 自充式复苏袋，并连接到测试肺上。使用麻醉机测量手动给复苏袋充气时输送到测试肺的氧气浓度，同时使用呼吸量计测量输送的潮气量。以 10、20 和 30 min(-1)的充气速率，对 300、600 和 900ml 的潮气量，在 0.5、2、6、12 和 15 l min(-1)的流量下，测量输送的氧气浓度。
在不同的氧气流量、潮气量和充气速率下，实现了范围广泛的输送氧气浓度，介于 24%至 99.5%之间。总体而言，随着所测试的氧气流量的每次递增，输送的氧气浓度都显著增加（所有比较的 p<0.001）。
使用标准的自充式复苏袋和储气囊调节氧气流量，可以实现有效的氧气输送滴定。
