Objective
Perioperative hypothermia (core temperature <36°C) occurs in 50%-to-80% of patients
recovering from thoracic aortic surgery, though its effects have not been described
fully in this context. The authors, therefore, sought to characterize the incidence
of perioperative hypothermia and its association with time from procedure end to extubation
in endovascular aortic surgical patients.
Design
A retrospective cohort study.
Setting
At a single academic tertiary center.
Participants
Patients recovering from thoracic aortic surgery with lumbar drains.
Intervention
None.
Measurements and Main Results
A total of 196 patients were included in this study, 55 of whom were hypothermic with
temperatures <35.0°C at the end of surgery. Though the unadjusted time to extubation
was not statistically different in the hypothermic group (median 8 minutes, IQR 5-13.5
minutes) compared to the normothermic group (median 7 minutes, IQR 4-12 minutes; p = 0.062),
multivariate predictors of increased time from procedure end to extubation included
hypothermia (p = 0.011), age (p = 0.009), diabetes (p = 0.015), history of carotid
disease (p = 0.040), and crystalloid volume (p = 0.019).
Conclusions
Hypothermia in patients recovering from endovascular aortic surgery was associated
with prolonged time from procedure end to extubation. Because of the retrospective
observational nature of the authors’ analysis, it was not possible to determine the
extent to which prolonged mechanical ventilation was influenced by low temperature.
Key Words
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Article info
Publication history
Published online: September 11, 2022
Identification
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- Earlier studies of prolonged times to tracheal extubation after end of surgeryJournal of Cardiothoracic and Vascular AnesthesiaVol. 37Issue 1
- PreviewArora and colleagues examined time to extubation after thoracic aortic surgery.1 In their very interesting study, they found negligible differences in median times to extubation between normothermic patients (7 minutes [95% confidence interval (CI) 6-to-8 minutes]) versus hypothermic patients (8 minutes [95% confidence interval 7-to-12 minutes]).1 There were significantly greater incidences of prolonged times to extubation among hypothermic patients (hazard ratio 2.06 [95% confidence interval 1.18-to-3.59]).
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