Aim

T-piece resuscitators are commonly used for respiratory support during newborn resuscitation. This study aimed to describe delivered pressures and tidal volumes when resuscitating term newborns immediately after birth, using the NeoPuff T-piece resuscitator.

Method

Observational study from June 2019 through March 2021 at Stavanger University Hospital, Norway, including term newborns ventilated with a T-piece resuscitator after birth, with consent to participate. Ventilation parameters of the first 100 inflations from each newborn were recorded by respiration monitors and divided into an early (inflation 1-20) and a late (inflation 21-100) phase.

Results

Of the 7730 newborns born, 232 term newborns received positive pressure ventilation. Of these, 129 newborns were included. In the early and the late phase, the median (interquartile range) peak inflating pressure was 30 (28-31) and 30 (27-31) mbar, and tidal volume was 4.5 (1.6-7.8) and 5.7 (2.2-9.8) ml/kg, respectively. Increased inflation times were associated with an increase in volume before plateauing at an inflation time of 0.41 seconds in the early phase and 0.50 seconds in the late phase. Inflation rates exceeding 32 per minute in the early phase and 41 per minute in the late phase were associated with lower tidal volumes.

Conclusion

There was a substantial variation in tidal volumes despite a relatively stable peak inflating pressure. Delivered tidal volumes were at the lower end of the recommended range. Our results indicate that an inflation time of approximately 0.5 seconds and rates around 30-40 per minute are associated with the highest delivered tidal volumes.

中文翻译：

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NeoPuff T 型复苏器在对足月新生儿进行复苏期间提供的潮气量和压力

目的

T 型复苏器通常用于新生儿复苏期间的呼吸支持。本研究旨在描述使用 NeoPuff T 型复苏器对出生后立即复苏足月新生儿时的输送压力和潮气量。

方法

2019 年 6 月至 2021 年 3 月在挪威斯塔万格大学医院进行的观察性研究，包括在出生后使用 T 型复苏器进行通气的足月新生儿，并同意参与。呼吸监测器记录每个新生儿前 100 次充气的通气参数，并分为早期（充气 1-20）和晚期（充气 21-100）阶段。

结果

在出生的 7730 名新生儿中，232 名足月新生儿接受了正压通气。其中，包括 129 名新生儿。在早期和晚期，中位（四分位距）峰值充气压力分别为 30 (28-31) 和 30 (27-31) mbar，潮气量分别为 4.5 (1.6-7.8) 和 5.7 (2.2-9.8)毫升/公斤，分别。充气时间增加与体积增加有关，然后在早期阶段的充气时间为 0.41 秒，在后期阶段的充气时间为 0.50 秒。早期通货膨胀率超过每分钟 32 次，晚期通货膨胀率超过每分钟 41 次与潮气量减少有关。

结论

尽管峰值膨胀压力相对稳定，但潮气量却有很大的变化。输送的潮气量处于推荐范围的下限。我们的结果表明，大约 0.5 秒的膨胀时间和大约每分钟 30-40 的速率与最高潮气量有关。