Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion

A randomized controlled trial

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Background: Insertion of a flexible laryngeal mask airway (LMA Flexible) is known to be more difficult than that of a conventional laryngeal mask airway. The 90° rotation technique can improve the success rate with a conventional laryngeal mask airway but its effect with the LMA Flexible remains unknown. We assessed whether the 90° rotation technique increased the first-attempt success rate of LMA Flexible insertion versus the standard technique. Methods: In total, 129 female patients undergoing breast surgery were analyzed. The primary endpoint was success at the first attempt. The insertion time, number of trials, number of manipulations required, and oropharyngeal leak pressure were also evaluated. Heart rate and mean blood pressure were recorded 1 min before and 1 min after insertion. Blood staining on the LMA Flexible after removal and postoperative sore throat were checked. Results: The first-attempt success rates were comparable between the groups (93% vs. 98.3%, P =.20). The insertion time, number of trials and manipulations, hemodynamic variables, and complications, such as blood staining and sore throat, did not differ between the groups. Conclusions: The 90° rotation technique is a good alternative to the standard technique for insertion of the LMA Flexible. Trial registration: ClinicalTrials.gov (NCT03028896). It was registered retrospectively at Jan 19th, 2017.

Original languageEnglish
Article number95
JournalBMC Anesthesiology
Volume19
Issue number1
DOIs
StatePublished - 7 Jun 2019

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Laryngeal Masks
Randomized Controlled Trials
Pharyngitis
Staining and Labeling
Breast
Heart Rate
Hemodynamics
Blood Pressure
Pressure

Keywords

  • LMA flexible

Cite this

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title = "Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion: A randomized controlled trial",
abstract = "Background: Insertion of a flexible laryngeal mask airway (LMA Flexible) is known to be more difficult than that of a conventional laryngeal mask airway. The 90° rotation technique can improve the success rate with a conventional laryngeal mask airway but its effect with the LMA Flexible remains unknown. We assessed whether the 90° rotation technique increased the first-attempt success rate of LMA Flexible insertion versus the standard technique. Methods: In total, 129 female patients undergoing breast surgery were analyzed. The primary endpoint was success at the first attempt. The insertion time, number of trials, number of manipulations required, and oropharyngeal leak pressure were also evaluated. Heart rate and mean blood pressure were recorded 1 min before and 1 min after insertion. Blood staining on the LMA Flexible after removal and postoperative sore throat were checked. Results: The first-attempt success rates were comparable between the groups (93{\%} vs. 98.3{\%}, P =.20). The insertion time, number of trials and manipulations, hemodynamic variables, and complications, such as blood staining and sore throat, did not differ between the groups. Conclusions: The 90° rotation technique is a good alternative to the standard technique for insertion of the LMA Flexible. Trial registration: ClinicalTrials.gov (NCT03028896). It was registered retrospectively at Jan 19th, 2017.",
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author = "Koo, {Bon Wook} and Oh, {Ah Young} and Jung-Won Hwang and Na, {Hyo Seok} and Min, {Seong Won}",
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Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion : A randomized controlled trial. / Koo, Bon Wook; Oh, Ah Young; Hwang, Jung-Won; Na, Hyo Seok; Min, Seong Won.

In: BMC Anesthesiology, Vol. 19, No. 1, 95, 07.06.2019.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion

T2 - A randomized controlled trial

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AU - Oh, Ah Young

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AU - Na, Hyo Seok

AU - Min, Seong Won

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Y1 - 2019/6/7

N2 - Background: Insertion of a flexible laryngeal mask airway (LMA Flexible) is known to be more difficult than that of a conventional laryngeal mask airway. The 90° rotation technique can improve the success rate with a conventional laryngeal mask airway but its effect with the LMA Flexible remains unknown. We assessed whether the 90° rotation technique increased the first-attempt success rate of LMA Flexible insertion versus the standard technique. Methods: In total, 129 female patients undergoing breast surgery were analyzed. The primary endpoint was success at the first attempt. The insertion time, number of trials, number of manipulations required, and oropharyngeal leak pressure were also evaluated. Heart rate and mean blood pressure were recorded 1 min before and 1 min after insertion. Blood staining on the LMA Flexible after removal and postoperative sore throat were checked. Results: The first-attempt success rates were comparable between the groups (93% vs. 98.3%, P =.20). The insertion time, number of trials and manipulations, hemodynamic variables, and complications, such as blood staining and sore throat, did not differ between the groups. Conclusions: The 90° rotation technique is a good alternative to the standard technique for insertion of the LMA Flexible. Trial registration: ClinicalTrials.gov (NCT03028896). It was registered retrospectively at Jan 19th, 2017.

AB - Background: Insertion of a flexible laryngeal mask airway (LMA Flexible) is known to be more difficult than that of a conventional laryngeal mask airway. The 90° rotation technique can improve the success rate with a conventional laryngeal mask airway but its effect with the LMA Flexible remains unknown. We assessed whether the 90° rotation technique increased the first-attempt success rate of LMA Flexible insertion versus the standard technique. Methods: In total, 129 female patients undergoing breast surgery were analyzed. The primary endpoint was success at the first attempt. The insertion time, number of trials, number of manipulations required, and oropharyngeal leak pressure were also evaluated. Heart rate and mean blood pressure were recorded 1 min before and 1 min after insertion. Blood staining on the LMA Flexible after removal and postoperative sore throat were checked. Results: The first-attempt success rates were comparable between the groups (93% vs. 98.3%, P =.20). The insertion time, number of trials and manipulations, hemodynamic variables, and complications, such as blood staining and sore throat, did not differ between the groups. Conclusions: The 90° rotation technique is a good alternative to the standard technique for insertion of the LMA Flexible. Trial registration: ClinicalTrials.gov (NCT03028896). It was registered retrospectively at Jan 19th, 2017.

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