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Unplanned extubation. Clinical predictors for reintubation.
Chest 1994 May
STUDY OBJECTIVE: To examine the incidence, clinical impact, and predictors of reintubation following unplanned extubation (UE) in ICU patients.
DESIGN: Retrospective data collection of prospectively identified consecutive cases of UE.
SETTING: The adult Medical, Coronary, Surgical, Cardiac Surgery, and Neuroscience ICUs of a University Medical Center.
PATIENTS: Eighty-one episodes of UE in 72 adolescent or adult (53 +/- 19 years) ICU patients.
MEASUREMENTS AND RESULTS: In 39 (48 percent) of 81 cases, reintubation was performed within 24 h of UE, 33 (85 percent) within the first hour, and 31 (79 percent) as a result of respiratory distress. There were five documented complications of UE and/or reintubation but no deaths. Clinical predictors for reintubation were sought from routinely available demographic, clinical, laboratory, and respiratory factors which had been documented in the medical records for the 24 h period prior to UE. Using univariate analysis followed by stepwise logistic regression in the first 56 cases (model set), the following factors were identified as being associated with reintubation: (1) volume controlled ventilation (synchronous intermittent mandatory ventilation or assist-control ventilation) with rate more than 6/min; (2) most recent arterial pH level prior to UE being 7.45 or more; (3) most recent ratio of PaO2 to fraction of inspired oxygen prior to UE less than 250 mm Hg; (4) highest heart rate in the 24 h prior to UE greater than 120 beats per minute; (5) presence of 3 or more coexisting medical disorders (of 7 possible); (6) mental status other than alert; and (7) indication for intubation other than "preoperative." In the model set, the presence of 4 or more of these 7 factors correctly predicted reintubation in 23 of 25 (92 percent positive predictive value) and presence of 3 or fewer factors correctly predicted no reintubation in 26 of 31 cases (83 percent negative predictive value), with outcome of 88 percent of cases being correctly predicted. The model was tested in the next 24 cases (validation set) in which 18 (75 percent) were correctly predicted.
CONCLUSION: Unplanned extubation can result in serious complications; however, about half the patients who have UE can be safely observed without immediate reintubation. Selected clinical factors, which are readily available from standard ICU records for the 24-h period prior to UE, may be useful to predict the likelihood of reintubation.
DESIGN: Retrospective data collection of prospectively identified consecutive cases of UE.
SETTING: The adult Medical, Coronary, Surgical, Cardiac Surgery, and Neuroscience ICUs of a University Medical Center.
PATIENTS: Eighty-one episodes of UE in 72 adolescent or adult (53 +/- 19 years) ICU patients.
MEASUREMENTS AND RESULTS: In 39 (48 percent) of 81 cases, reintubation was performed within 24 h of UE, 33 (85 percent) within the first hour, and 31 (79 percent) as a result of respiratory distress. There were five documented complications of UE and/or reintubation but no deaths. Clinical predictors for reintubation were sought from routinely available demographic, clinical, laboratory, and respiratory factors which had been documented in the medical records for the 24 h period prior to UE. Using univariate analysis followed by stepwise logistic regression in the first 56 cases (model set), the following factors were identified as being associated with reintubation: (1) volume controlled ventilation (synchronous intermittent mandatory ventilation or assist-control ventilation) with rate more than 6/min; (2) most recent arterial pH level prior to UE being 7.45 or more; (3) most recent ratio of PaO2 to fraction of inspired oxygen prior to UE less than 250 mm Hg; (4) highest heart rate in the 24 h prior to UE greater than 120 beats per minute; (5) presence of 3 or more coexisting medical disorders (of 7 possible); (6) mental status other than alert; and (7) indication for intubation other than "preoperative." In the model set, the presence of 4 or more of these 7 factors correctly predicted reintubation in 23 of 25 (92 percent positive predictive value) and presence of 3 or fewer factors correctly predicted no reintubation in 26 of 31 cases (83 percent negative predictive value), with outcome of 88 percent of cases being correctly predicted. The model was tested in the next 24 cases (validation set) in which 18 (75 percent) were correctly predicted.
CONCLUSION: Unplanned extubation can result in serious complications; however, about half the patients who have UE can be safely observed without immediate reintubation. Selected clinical factors, which are readily available from standard ICU records for the 24-h period prior to UE, may be useful to predict the likelihood of reintubation.
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