EVALUATION OF A LARYNGEAL MASK AIRWAY AS AN ALTERNATIVE TO OROTRACHEAL INTUBATION FOR MAINTAINING AIRWAY PATENCY DURING INHALANT ANESTHESIA UNDER SPONTANEOUS VENTILATION IN CAPYBARAS (HYDROCHOERUS HYDROCHAERIS)

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Carolina H. Girotto ◽  
Francisco J. Teixeira-Neto ◽  
André A. Justo ◽  
Elizabeth R. Carvalho ◽  
Mariana W. Fonseca ◽  
...  
Keyword(s):  
Laryngeal Mask Airway ◽  
Orotracheal Intubation ◽  
Laryngeal Mask ◽  
Spontaneous Ventilation ◽  
Airway Patency ◽  
Hydrochoerus Hydrochaeris

scholarly journals Effect of inhaled carbon dioxide on laryngeal abduction

2015 ◽  
Vol 118 (4) ◽  
pp. 489-494 ◽  
Author(s):  
Jonathan Cheetham ◽  
Amanda Jones ◽  
Manuel Martin-Flores
Keyword(s):  
Laryngeal Mask Airway ◽  
High Speed ◽  
Upper Airway ◽  
Laryngeal Mask ◽  
Maximal Response ◽  
High Temporal Resolution ◽  
Respiratory Drive ◽  
Laryngeal Function ◽  
Airway Patency ◽  
End Tidal

Hypercapnia produces a profound effect on respiratory drive and upper airway function to maintain airway patency. Previous work has evaluated the effects of hypercapnia on the sole arytenoid abductor, the posterior cricoarytenoid (PCA), using indirect measures of function, such as electromyography and direct nerve recording. Here we describe a novel method to evaluate PCA function in anesthetized animals and use this method to determine the effects of hypercapnia on PCA function. Eight dogs were anesthetized, and a laryngeal mask airway was used, in combination with high-speed videoendoscopy, to evaluate laryngeal function. A stepwise increase in inspired partial pressure of CO2 produced marked arytenoid abduction above 70-mmHg end-tidal CO2 (ETCO2) ( P < 0.001). Glottic length increased above 80-mmHg ETCO2 ( P < 0.02), and this lead to underrepresentation of changes in glottic area, if standard measures of glottic area (normalized glottic gap area) were used. Use of a known scale to determine absolute glottic area demonstrated no plateau with increasing ETCO2 up to 120 mmHg. Ventilatory parameters also continued to increase with no evidence of a maximal response. In a second anesthetic episode, repeated bursts of transient hypercapnia for 60 s with an ETCO2 of 90 mmHg produced a 43–55% increase in glottic area ( P < 0.001) at or shortly after the end of the hypercapnic burst. A laryngeal mask airway can be used in combination with videoendoscopy to precisely determine changes in laryngeal dimensions with high temporal resolution. Absolute glottic area more precisely represents PCA function than normalized glottic gap area at moderate levels of hypercapnia.

scholarly journals The use of the laryngeal mask airway to assist fibreoptic orotracheal intubation

Anaesthesia ◽  
1991 ◽  
Vol 46 (10) ◽  
pp. 891-891 ◽  
Author(s):  
F. Hasham ◽  
C.M. Kumar ◽  
P.G.P. Lawler
Keyword(s):  
Laryngeal Mask Airway ◽  
Orotracheal Intubation ◽  
Laryngeal Mask

Proseal Laryngeal mask airway or Classic Laryngeal mask airway in spontaneous ventilation?

2004 ◽  
Vol 21 (Supplement 32) ◽  
pp. 68
Author(s):  
V. Galarioti ◽  
Ch. Michaloliakou ◽  
N. Kalanzi ◽  
A. Pagoulatou ◽  
A. Andrianopoulou
Keyword(s):  
Laryngeal Mask Airway ◽  
Proseal Laryngeal Mask Airway ◽  
Laryngeal Mask ◽  
Spontaneous Ventilation ◽  
Classic Laryngeal Mask Airway
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