Efficacy of nasopharyngeal airway for airway management during anesthesia recovery in obese patients

Yanqing Chen; Ling Peng; Ying Lin

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Efficacy of nasopharyngeal airway for airway management during anesthesia recovery in obese patients

VernacularTitle:鼻咽通气道用于肥胖患者麻醉恢复期气道管理的效果
Author: Yanqing CHEN ; Ling PENG ; Ying LIN
Publication Type:Journal Article
Keywords: Nasopharynx; Anesthesia recovery period; Obesity
From: Chinese Journal of Anesthesiology 2009;29(12):1113-1115
CountryChina
Language:Chinese
Abstract: Objective To evaluate the efficacy of the nasopharyngeal airway for airway management during anesthesia recovery in obese patients. Methods Eighty ASA Ⅰ-Ⅲ patients, aged 48-72 yr, body mass index > 30 kg/m~2 , were randomly divided into 2 groups (n=40 each) : nasopharyngeal airway group (group Ⅰ) and oropharyngeal airway group (group Ⅱ). The extubation was performed after recovery of breathing (RR ≥ 10 bpm, V_T≥5 ml/kg). The nasopharyngeal airway was inserted though the nasal cavity immediately after extnhation in group Ⅰ, and the oropharyngeal airway was inserted though the oral cavity after extubation in group Ⅱ. Oxygen (3 L/min) was then inhaled by mask until recovery of consciousness in both groups, and if SpO_2 < 90%, the rescue medication was given. The changes in RR, SpO_2 , HR, SP and DP were observed at 1 min (T_1), 5 min (T_2), 10 min (T_3) and 20 min (T_4) after insertion of the airway and complications were recorded in 20 min after insertion of the airway. Results The RR, SpO_2, HR, SP and DP were all maintained in the normal range after insertion of the airway in both groups. The RR,HR, SP and DP at T_(3,4) and incidence of resdessness, nausea and vomiting, and laryngospasm were significantly lower in group Ⅰ than in group Ⅱ (P<0.05), while there was no significant difference in SpO_2 at each time point between group Ⅰ and group Ⅱ(P>0.05). Conclusion The efficacy of the nasopharyngeal airway is similar to that of the oropharyngeal airway for the relief of the upper respiratory tract obstruction during anesthesia recovery in obese patients, but the stress response induced is lower and complications are fewer.