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2003, Number 4

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Rev Mex Anest 2003; 26 (4)

Llenado pasivo del manguito de la mascarilla laríngea, como una alternativa del inflado convencional

Cruz-Villaseńor JA, Guadarrama QF, Rodríguez PMV, Porras QR, Pérez FR, Alvarado SE, Cendón OM, Chávez RMA

Language: Spanish
References: 20
Page: 203-208
PDF size: 192.49 Kb.


ABSTRACT

Introduction: Using laryngeal mask airway (LMA) for anesthetic procedures has been related to sore throat, nerve lesion, epiglottitis, dysphonia and luxation of the arytenoids, which are probably due to pressure exerted by LMA. Objective: To compare alternative methods for LMA’s cuff inflation as to lessen pressure on laryngeal mucose while optimizing LMA characteristics. Material and methods: A controlled, blind, prospective, longitudinal, comparative and observational clinical trial was conducted in forty individuals randomly assigned to two groups: 1) Passive inflation-connection of LMA pilot to a three-way stopcock and cuff open to atmospheric pressure (PITG), 2) Standard inflation technique (SITG). LMA position, airway sealing and sore throat were evaluated. LMA’s cuff pressure and that exerted on pharyngeal mucose were measured and calculated, respectively. Statistical analysis was carried out by applying central tendency and dispersion measurements, percentage measurements, Student’s t test and Fisher´s Exact test with statistical significance established at p < 0.05. Results: Initial cuff pressure was 9 + 6 cm H2O in PITG and 89 + 10 cm H2O in SITG (p < 0.01). Pressure exerted on pharyngeal mucose was 4 + 3 cm H2O in PITG and 24 + 4 cm H2O in SITG (p < 0.04). There was no statistical difference in sore throat. Conclusions: Passive inflation technique produces adequate airway sealing which it is as safe as the one obtained by standard inflation technique but pressure generated by LMA’s cuff on pharyngeal mucose is significatively lower than that produced by standard technique.


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