The McCoy levering laryngoscope in patients with limited neck extension

Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie
T UchidaK Yasuda

Abstract

The McCoy levering laryngoscope is a modified Macintosh laryngoscope, which has a hinged tip controlled by a lever on the handle. The purpose of this study was to investigate whether the tip elevation of this laryngoscope results in better laryngeal visualization than using the Macintosh laryngoscope when the patient's neck is fixed in the neutral position. Fifty female patients (ASA physical status I-II) undergoing elective surgery during general anaesthesia were investigated. The patient's neck was manually fixed in the neutral position by an assistant, and laryngeal visualization was attempted first with a size #3 Macintosh laryngoscope (Macintosh trial), and then with a size #3 McCoy levering laryngoscope with blade tip elevation (McCoy trial), and tracheal intubation was attempted. Trials of laryngeal visualization were evaluated with the Cormack score. In the Macintosh trial, 36 of 50 (72%) patients were evaluated grade 3, and two grade 4. In most of the patients graded 2 and 3 in the Macintosh trial (70% of the grade 2 and 83% of the grade 3 cases), the laryngeal view was improved by using the McCoy levering laryngoscope. The Cormack grade in the McCoy trial was less than that in the Macintosh trial (P < 0.01). No compli...Continue Reading

References

Nov 1, 1984·Anaesthesia·R S Cormack, J Lehane
Nov 1, 1993·Anaesthesia·R Marks
Jun 1, 1993·Anaesthesia·E P McCoy, R K Mirakhur
Jan 1, 1996·Anaesthesia·S C LaurentJ M Alexander-Williams

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Citations

Oct 30, 1998·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·E T CrosbyL Roy
Feb 10, 2004·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Eamon McCoy
Feb 10, 2004·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Gabriella IohomBarry Lyons
Aug 6, 2009·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Muhammad A MalikJohn G Laffey
Nov 20, 2012·Saudi Journal of Anaesthesia·Jiju JosephMadhusudan Upadya
Jul 5, 2013·Indian Journal of Anaesthesia·Atul P Kulkarni, Amar S Tirmanwar
Dec 9, 2008·Emergency Medicine Clinics of North America·Michael F MurphyJ Adam Law
Aug 15, 2000·Critical Care Clinics·R Levitan, E A Ochroch
Jun 18, 2004·Anaesthesia·J J HendersonUNKNOWN Difficult Airway Society
Mar 26, 2009·Anaesthesia·C M Frerk, G Lee
Dec 18, 2008·Anaesthesia·M J EdwardsP Cumpston
Jan 18, 2006·Best Practice & Research. Clinical Anaesthesiology·Andreas R Thierbach, Christian Werner
Mar 24, 2016·Journal of Anaesthesiology, Clinical Pharmacology·Divya JainKomal Gandhi
Apr 2, 2008·Emergency Medicine Australasia : EMA·Martin RochfordMartin Duffy
Oct 4, 2006·Current Opinion in Anaesthesiology·C E Smith, S J Dejoy

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