Immediate post-operative effects of tracheotomy on respiratory function during mechanical ventilation

Tracheotomy is widely performed in the intensive care unit after long-term oral intubation. The present study investigates the immediate influence of tracheotomy on respiratory mechanics and blood gases during mechanical ventilation. Tracheotomy was performed in 32 orally intubated patients for 10.5...

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Veröffentlicht in:Critical care (London, England) England), 2004-08, Vol.8 (4), p.R243-R247, Article R243
Hauptverfasser: Amygdalou, Argyro, Dimopoulos, George, Moukas, Markos, Katsanos, Christos, Katagi, Athina, Mandragos, Costas, Constantopoulos, Stavros H, Behrakis, Panagiotis K, Vassiliou, Miltos P
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Sprache:eng
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Zusammenfassung:Tracheotomy is widely performed in the intensive care unit after long-term oral intubation. The present study investigates the immediate influence of tracheotomy on respiratory mechanics and blood gases during mechanical ventilation. Tracheotomy was performed in 32 orally intubated patients for 10.5 +/- 4.66 days (all results are means +/- standard deviations). Airway pressure, flow and arterial blood gases were recorded immediately before tracheotomy and half an hour afterwards. Respiratory system elastance (Ers), resistance (Rrs) and end-expiratory pressure (EEP) were evaluated by multiple linear regression. Respiratory system reactance (Xrs), impedance (Zrs) and phase angle (phirs) were calculated from Ers and Rrs. Comparisons of the mechanical parameters, blood gases and pH were performed with the aid of the Wilcoxon signed-rank test (P = 0.05). Ers increased (7 +/- 11.3%, P = 0.001), whereas Rrs (-16 +/- 18.4%, P = 0.0003), Xrs (-6 +/- 11.6%, P = 0.006) and phi rs (-14.3 +/- 16.8%, P =
ISSN:1364-8535
1466-609X
1364-8535
DOI:10.1186/cc2886