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- Title
A simple mechanical device reduces subglottic injury in ventilated animals.
- Authors
Osborn, Alexander J.; Chami, Rose; Propst, Evan J.; Luginbuehl, Igor; Taylor, Glenn; Fisher, Joseph A.; Forte, Vito
- Abstract
Objectives/Hypothesis To test whether a simple inexpensive device that dynamically minimizes endotracheal cuff pressure throughout the respiratory cycle reduces endotracheal cuff pressure-related subglottic injury. Study Design Hypoxic animal model with one control and one experimental group. Methods Twelve S. scrofa domesticus piglets (14-16kg) were intubated with standard endotracheal tubes and maintained in a hypoxic state to accelerate airway injury. Animals in the control group (n = 6) were ventilated with a constant pressure of 20 cm H2O in the endotracheal tube cuff. Animals in the experimental group (n = 6) were ventilated using a custom-designed circuit that altered the pressure in the endotracheal tube cuff in synchrony with the ventilatory cycle. Larynges were harvested at the end of the experiment and examined histologically to determine the degree of airway injury induced by the endotracheal cuff. Results Animals in the experimental group suffered significantly less airway damage than those in the control group. The differences were seen primarily in the subglottis (aggregate damage score 6.5 vs. 12, P <0.05), where the experimental endotracheal tube cuff exerted the least pressure. There was no difference in damage to the glottic or supraglottic structures. Conclusions A simple, reliable, and inexpensive means of modulating endotracheal tube cuff pressure with the ventilatory cycle led to a substantial decrease in airway injury in our animal model. Such reduction in cuff pressure may prove important for humans, particularly those in intensive care units who tend to have underlying conditions predisposing them to tracheal damage from the endotracheal tube cuff. Level of Evidence N/A. Laryngoscope, 123:2742-2748, 2013
- Subjects
MEDICAL equipment; ENDOTRACHEAL tubes; AIRWAY (Anatomy); ARTIFICIAL respiration; RESPIRATORY organ injuries; ANIMAL models in research
- Publication
Laryngoscope, 2013, Vol 123, Issue 11, p2742
- ISSN
0023-852X
- Publication type
Article
- DOI
10.1002/lary.24069