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The Effects of Tidal Volume on Minimal Occlusion Pressure of Endotracheal Tube Cuff in Patients with Same Peak Inspiratory pressure  

Sohn, Jang Won (Department of Internal Medicine, Hanyang University College of Medicine)
Kim, Tae Hyung (Department of Internal Medicine, Hanyang University College of Medicine)
Yoon, Ho Joo (Department of Internal Medicine, Hanyang University College of Medicine)
Shin, Dong Ho (Department of Internal Medicine, Hanyang University College of Medicine)
Park, Sung Soo (Department of Internal Medicine, Hanyang University College of Medicine)
Publication Information
Tuberculosis and Respiratory Diseases / v.57, no.5, 2004 , pp. 434-438 More about this Journal
Abstract
Background : An excessive endotracheal cuff pressure can cause tracheal injury, and insufficient cuff pressure may not generate an effective cuff seal. The peak inspiratory pressure influences the minimal occlusion pressure of the endotracheal tube cuff. However, the relationship between the minimal occlusion pressure and the tidal volume has not been investigated. This study was conducted to estimate the relationship between the tidal volume and the minimal occlusion pressure of the cuff. Methods : Ten mechanically ventilated patients were included. The minimal occlusion pressure of the cuff was measured using a pressure gauge. The basal tidal volume was increased and decreased as much as 10% whilst maintaining the same peak inspiratory pressure. The, minimal occlusion pressures were then measured in the high and low tidal volume state, respectively. Results : The peak inspiratory pressure was $32.6{\pm}4.72cmH_2O$ and the minimal occlusion pressure was $19.0{\pm}2.26$ mmHg in the basal ventilator setting. There was a significant relationship between the peak inspiratory pressure and the minimal occlusion pressure(r=0.77, p<0.01). The minimal occlusion pressure of the cuff was increased to $20.3{\pm}2.4$ mmHg in the high tidal volume state(p<0.05), and decreased to $16.8{\pm}3.01$ mmHg in the low tidal volume state (p<0.001). Conclusion : The minimal occlusion pressure of the cuff can be influenced by changes in the tidal volume as well as by the peak inspiratory pressure.
Keywords
Cuff pressure; Peak inspiratory pressure; Tidal volume;
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