From the Department of Anaesthesiology and Reanimation, Ankara City Hospital, Ankara, Turkey.
Saudi Med J. 2024 Feb;45(2):147-153. doi: 10.15537/smj.2024.45.2.20230578.
To determine an optimal cuff inflation volume to achieve safe cuff pressure (20-25 cmH2O) in cuffed endotracheal tubes (ETTs) with an inner diameter of 4.5, 5.0, and 5.5 mm, which are commonly used in pediatric anaesthesia clinical practice and to create a formula to determine the optimal cuff volume.
This study was carried out between February and June 2021 in Ankara City Hospital, Ankara, Turkey. A total of 127 pediatric patients who were intubated with 4.5, 5.0 and 5.5 numbered cuffed ETTs were included in this study. The same brand of cuffed ETT was used for each patient. The diameter of the subglottic transverse airway was measured by ultrasound for selecting the appropriate tube. Cuff pressure was measured with a cuff manometer to ensure optimum cuff pressure (20-25 cmH2O).
We found out that the mean ideal cuff volume inflated for 4.5 size tube was 1.7±0.3 ml, 1.9±0.3 ml for 5.0 size tube, and 2.1±0.3 ml for 5.5 size tube. Additionally we developed the "endotracheal cuff volume (ml) = 1,027 x height (m) + 0,104 x subglottic transverse diameter (mm) - 0,0191" formula to predict the most suitable inflation volume for ETT cuffs.
In this study, we suggested the optimal cuff volume to inflate the cuffs of ETTs 4.5, 5.0, and 5.5, which are frequently used in pediatric anaesthesia practice, in the appropriate cuff pressure range..
确定一个最佳的袖带充气量，以实现内径为 4.5、5.0 和 5.5 毫米的带套气管内导管（ETT）的安全袖带压力（20-25cmH2O），并创建一个公式来确定最佳袖带容量。
本研究于 2021 年 2 月至 6 月在土耳其安卡拉市医院进行。共有 127 名接受 4.5、5.0 和 5.5 编号带套 ETT 插管的儿科患者纳入本研究。为每位患者使用相同品牌的带套 ETT。通过超声测量声门下横向气道的直径，以选择合适的管。使用袖带压力计测量袖带压力，以确保最佳袖带压力（20-25cmH2O）。
我们发现，4.5 尺寸管的理想充气量平均为 1.7±0.3ml，5.0 尺寸管为 1.9±0.3ml，5.5 尺寸管为 2.1±0.3ml。此外，我们还开发了“气管内套囊容积（ml）=1.027x 身高（m）+0.104x 声门下横向直径（mm）-0.0191”公式，以预测 ETT 套囊最适合的充气量。
在这项研究中，我们建议在儿科麻醉实践中经常使用的 4.5、5.0 和 5.5 毫米 ETT 套囊充气至适当的袖带压力范围内的最佳袖带容量。
