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Cardiovasular changes after placement of a classic endotracheal tube, double-lumen tube, and Laryngeal Mask Airway.
MedLine Citation:
PMID:  22137512     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
STUDY OBJECTIVE: To compare hemodynamic responses, P wave dispersion (Pd), and QT dispersion (QTd) after placement of a classic endotracheal tube (ETT), double-lumen tube (DLT), or Laryngeal Mask Airway (LMA).
DESIGN: Prospective study.
SETTING: Outpatient surgery center.
PATIENTS: 75 adult, ASA physical status 1 and 2 patients undergoing cystoscopy and thoracoscopic surgery.
INTERVENTIONS: Patients were randomized to undergo placement of an ETT (Group T; n = 25), DLT (Group D; n = 25), or LMA (Group L; n = 25). Anesthesia was induced by etomidate 0.3 mg/kg and fentanyl 1.0 μg/kg, and maintained with nitrous oxide, oxygen, 2% to 3% sevoflurane, and rocuronium 0.5 mg/kg.
MEASUREMENTS: Mean arterial pressure (MAP) and heart rate (HR) were recorded immediately before intubation and after intubation at one, 3, 5, 10,15, 20, 25, and 30 minutes after intubation/airway insertion.
RESULTS: QT dispersion after tube placement was significantly higher than before tube placement in Group D (P = 0.0001) and Group L (P = 0.03). Mean arterial pressure and HR in Group T were significantly higher than in Group L at the first minute after tube placement (P = 0.02). Heart rate and MAP at baseline were significantly higher than the other measurement times in Groups T and D (P < 0.01).
CONCLUSIONS: The LMA caused no change in Pd, HR, or MAP values during or after airway placement, but caused QTd after airway insertion. The ETT caused a sudden increase at the first minute after tube placement, without any Pd or QTd. In addition, DLT caused QTd without any serious change in hemodynamics.
Authors:
Ayse Mizrak; Betul Kocamer; Hayati Deniz; Fatih Yendi; Unsal Oner
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of clinical anesthesia     Volume:  23     ISSN:  1873-4529     ISO Abbreviation:  J Clin Anesth     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-05     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8812166     Medline TA:  J Clin Anesth     Country:  United States    
Other Details:
Languages:  eng     Pagination:  616-20     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Inc. All rights reserved.
Affiliation:
Department of Anaesthesiology and Reanimation, Gaziantep University School of Medicine, 27310 Sahinbey, Gaziantep, Turkey.
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