PURPOSE: To determine incidence, risk factors and outcome of tracheal ischemic lesions related to intubation. METHODS: Planned post hoc analysis using patients from a previous randomized controlled study. Fiberoptic tracheoscopy was performed during the 24 h following extubation. In patients with >2 ischemic lesions, ulcer or tracheal rupture, fiberoptic tracheoscopy was repeated 2 weeks after the last extubation. Tracheal ischemic lesions were predefined based on a quantitative score. RESULTS:Ninety-six adult patients were included in this study. Eighty (83 %) patients had at least one tracheal ischemic lesion. Thirty-seven (38 %) patients had a tracheal ischemia score > median score (5; IQ 1, 7). The most common tracheal ischemic lesion was ischemia (68 %), followed by hyperemia (54 %), ulcer (10 %), and tracheal rupture (1 %). Univariate analysis identified duration of neuromuscular-blocking agent use, overinflation of tracheal cuff (>30 cmH2O), percentage of P cuff determination >30 cmH2O, duration of assist-control ventilation, and plateau pressure as risk factors for having a tracheal ischemia score >5. Duration of assist-control mechanical ventilation was the only factor independently associated with tracheal ischemia score >5 [OR (95 % CI) 1.10 per hour (1.02-1.20)]. A fiberoptic tracheoscopy was performed 2 weeks after extubation in 22 patients. This examination was normal in all patients, except the one with tracheal rupture who had marked improvement. CONCLUSION:Tracheal ischemic lesions are common in intubated, critically ill patients. Duration of assist-control mechanical ventilation through a tracheal tube is the only independent risk factor. These lesions healed in the majority of patients 2 weeks after extubation.
RCT Entities:
PURPOSE: To determine incidence, risk factors and outcome of tracheal ischemic lesions related to intubation. METHODS: Planned post hoc analysis using patients from a previous randomized controlled study. Fiberoptic tracheoscopy was performed during the 24 h following extubation. In patients with >2 ischemic lesions, ulcer or tracheal rupture, fiberoptic tracheoscopy was repeated 2 weeks after the last extubation. Tracheal ischemic lesions were predefined based on a quantitative score. RESULTS: Ninety-six adult patients were included in this study. Eighty (83 %) patients had at least one tracheal ischemic lesion. Thirty-seven (38 %) patients had a tracheal ischemia score > median score (5; IQ 1, 7). The most common tracheal ischemic lesion was ischemia (68 %), followed by hyperemia (54 %), ulcer (10 %), and tracheal rupture (1 %). Univariate analysis identified duration of neuromuscular-blocking agent use, overinflation of tracheal cuff (>30 cmH2O), percentage of P cuff determination >30 cmH2O, duration of assist-control ventilation, and plateau pressure as risk factors for having a tracheal ischemia score >5. Duration of assist-control mechanical ventilation was the only factor independently associated with tracheal ischemia score >5 [OR (95 % CI) 1.10 per hour (1.02-1.20)]. A fiberoptic tracheoscopy was performed 2 weeks after extubation in 22 patients. This examination was normal in all patients, except the one with tracheal rupture who had marked improvement. CONCLUSION:Tracheal ischemic lesions are common in intubated, critically ill patients. Duration of assist-control mechanical ventilation through a tracheal tube is the only independent risk factor. These lesions healed in the majority of patients 2 weeks after extubation.
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