Confirmation of the Depth of Endotracheal Tube with Saline-filled Cuff by Ultrasound
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Abstract
Background: Malposition of endotracheal tube can lead to serious complications, so positioning the endotracheal tip
4 cm above carina was recommended. Tracheal ultrasound with saline-filled endotracheal cuff has been used to confirm endotracheal position because it’s simple, safe and reproducible. We aimed to find the distance between lower border of cricoid cartilage and upper border of endotracheal cuff which the tip of endotracheal tube was placed 4 cm above carina using ultrasound-guided.
Methods: The study was conducted on 18-65 years old patients, ASA I and II undergoing elective surgery under general anesthesia with endotracheal tube intubation. After the endotracheal tube was inserted, the position of the tip of endotracheal tube was adjusted to 4 cm above carina by using fiberoptic bronchoscope then the endotracheal cuff was filled with saline 7 ml. The distance between lower border of cricoid cartilage and upper border of endotracheal cuff was measured by longitudinal tracheal ultrasonography. Data were reported as mean±SD
Results: One hundred and thirty two patients were enrolled. The mean distance between lower border of cricoid cartilage and upper border of endotracheal cuff was 1.17±0.49 cm, 1.19±0.52 cm and 1.15±0.47 cm in all population, male and female, respectively.
Conclusions: The measurement distance between lower border of cricoid cartilage and upper border of saline-filled endotracheal cuff by ultrasound can be used as another modality to optimize the proper position of endotracheal tube.
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