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Randomized Controlled Trial
. 2011 Mar;20(2):109-17; quiz 118.
doi: 10.4037/ajcc2011661.

Evaluation of an intervention to maintain endotracheal tube cuff pressure within therapeutic range

Mary Lou Sole  1 , Xiaogang Su, Steve Talbert, Daleen Aragon Penoyer, Samar Kalita, Edgar Jimenez, Jeffery E Ludy, Melody Bennett
Affiliations
Randomized Controlled Trial

Evaluation of an intervention to maintain endotracheal tube cuff pressure within therapeutic range

Mary Lou Sole et al. Am J Crit Care. 2011 Mar.

Abstract

Background: Endotracheal tube cuff pressure must be kept within an optimal range that ensures ventilation and prevents aspiration while maintaining tracheal perfusion.

Objectives: To test the effect of an intervention (adding or removing air) on the proportion of time that cuff pressure was between 20 and 30 cm H(2)O and to evaluate changes in cuff pressure over time.

Methods: A repeated-measure crossover design was used to study 32 orally intubated patients receiving mechanical ventilation for two 12-hour shifts (randomized control and intervention conditions). Continuous cuff pressure monitoring was initiated, and the pressure was adjusted to a minimum of 22 cm H(2)O. Caregivers were blinded to cuff pressure data, and usual care was provided during the control condition. During the intervention condition, cuff pressure alarm or clinical triggers guided the intervention.

Results: Most patients were men (mean age, 61.6 years). During the control condition, 51.7% of cuff pressure values were out of range compared with 11.1% during the intervention condition (P < .001). During the intervention, a mean of 8 adjustments were required, mostly to add air to the endotracheal tube cuff (mean 0.28 [SD, 0.13] mL). During the control condition, cuff pressure decreased over time (P < .001).

Conclusions: The intervention was effective in maintaining cuff pressure within an optimal range, and cuff pressure decreased over time without intervention. The effect of the intervention on outcomes such as ventilator-associated pneumonia and tracheal damage requires further study.

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Figures

Figure 1
Figure 1
Study design.
Figure 2
Figure 2
Proportion of cuff pressures within the normal range, high, and low in the control and intervention conditions.
Figure 3
Figure 3
Example of cuff pressure in control and intervention conditions for one subject.
See this image and copyright information in PMC

Comment in

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