在接受择期全身麻醉并进行正压通气的患者中，LMA-Classic喉罩与AMBU AuraOnce喉罩的比较。

Comparison between LMA-Classic and AMBU AuraOnce laryngeal mask airway in patients undergoing elective general anaesthesia with positive pressure ventilation.

作者信息

Suzanna A B, Liu C Y, Rozaidi S W Syed, Ooi J S M

机构信息

Department of Anaesthesiology and Intensive Care, Hospital Sungai Buloh, Selangor, Malaysia.

出版信息

Med J Malaysia. 2011 Oct;66(4):304-7.

PMID:22299547

Abstract

BACKGROUND

The LMA-Classic laryngeal mask airway (Classic LMA) is an autoclavable and reusable laryngeal mask airway with strong evidence supporting its efficacy and safety. Due to the concern of infection risk particularly of prion disease, various single-use laryngeal mask devices were developed. The Ambu AuraOnce LMA (Ambu LMA) is a single use disposable laryngeal mask airway with special design that conforms better to the anatomy of the airway.

OBJECTIVES

The Ambu LMA was compared to the LMA-Classic Classic LMA in respect to ease of insertion, adequacy of seal intraoperatively and postoperative complications in patients undergoing elective general anaesthesia with positive pressure ventilation.

METHODS

One hundred and eighteen ASA I and II patients undergoing elective general anaesthesia were randomly allocated into receiving either the Ambu LMA or the Classic LMA. The time taken and number of attempts taken to insert the laryngeal mask was recorded. Intra-operative adequacy of seal was assessed via the amount of nitrous oxide leak using a nitrous oxide analyser. Readings were charted at 0, 20, 40 and 60 minutes of operation. Complications postoperatively (blood stains on the device and occurrence of sore throat) were also recorded.

RESULTS

The success of first attempt insertion was comparable between the two groups (Classic LMA 87% versus Ambu LMA 83%). However the time of insertion was significantly shorter in the Ambu LMA group (p = 0.008). Nitrous oxide level was comparable between the two groups up to 20 minutes of operation. At 40 and 60 minutes, the Ambu LMA showed a significant lower nitrous oxide leak compared to the Classic LMA. Postoperatively, incidence of blood stains was comparable between the two groups, however the incidence of sore throat was lower in the Ambu LMA group (p = 0.025).

CONCLUSIONS

This study demonstrated that the Ambu LMA was comparable to the Classic LMA in terms of the ease of insertion, but provided better seal during positive pressure ventilation with less postoperative sore throat.

摘要

背景

LMA-Classic喉罩气道（经典LMA）是一种可高压灭菌且可重复使用的喉罩气道，有充分证据支持其有效性和安全性。由于对感染风险尤其是朊病毒病风险的担忧，人们研发了各种一次性喉罩装置。Ambu AuraOnce喉罩（Ambu喉罩）是一种一次性使用的喉罩气道，其特殊设计能更好地贴合气道解剖结构。

目的

在接受择期全身麻醉并进行正压通气的患者中，比较Ambu喉罩与经典LMA在插入 ease、术中密封 adequacy 和术后并发症方面的差异。

方法

118例ASA I级和II级择期全身麻醉患者被随机分配接受Ambu喉罩或经典LMA。记录插入喉罩的时间和尝试次数。通过使用氧化亚氮分析仪测量氧化亚氮泄漏量来评估术中密封的adequacy。在手术0、20、40和60分钟时记录读数。还记录术后并发症（装置上的血迹和喉咙痛的发生情况）。

结果

两组首次尝试插入的成功率相当（经典LMA为87%，Ambu喉罩为83%）。然而，Ambu喉罩组的插入时间明显更短（p = 0.008）。在手术20分钟内，两组的氧化亚氮水平相当。在40和60分钟时，与经典LMA相比，Ambu喉罩的氧化亚氮泄漏量明显更低。术后，两组的血迹发生率相当，但Ambu喉罩组的喉咙痛发生率更低（p = 0.025）。