The Influence of Head and Neck Position on Oropharyngeal Leak Pressure and Cuff Position with the Flexible and the Standard Laryngeal Mask Airway

Keller, Christian; Brimacombe, J.

doi:10.1213/00000539-199904000-00042

Cited by 71 publications

(5 citation statements)

References 19 publications

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“…However, similar ease of insertion of the LMA Flexible is also reported [9]. 100% success rate of insertion of the LMA Flexible at the first attempt with the use of stadard insertion technique was also reported [10].…”

Section: Introductionsupporting

confidence: 54%

Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion: a randomized controlled trial

Koo

Hwang

et al. 2019

BMC Anesthesiol

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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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Section: Introductionsupporting

confidence: 54%

Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion: a randomized controlled trial

Koo

Hwang

et al. 2019

BMC Anesthesiol

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“…Neck extension increases the anteriorposterior diameter by raising the hyoid and the laryngeal inlet. 16,17 The large ellipsoid cuff with a larger volume (LTS or CobraPLA approximately 50 mL vs PLMA approximately 20 mL) might maintain cuff pressure and mitigate the decrease in oropharyngeal leak pressure, despite the increase of the anteriorposterior diameter (Fig. 1).…”

Section: Discussionmentioning

confidence: 99%

The Influence of Head and Neck Position on the Oropharyngeal Leak Pressure and Cuff Position of Three Supraglottic Airway Devices

Park¹,

Han²,

Hwan³

et al. 2009

Anesthesia &Amp; Analgesia

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“…Airway sealing pressure was measured by closing the expiratory valve of the circle system and delivering a gas flow of 3 L per minute until the equilibrium pressure or a maximum of 40 cmH 2 O was reached [19]. The presence of an air leak to the stomach (as detected by epigastric stethoscope) or mouth was recorded.…”

Section: Methodsmentioning

confidence: 99%

A clinical evaluation of four disposable laryngeal masks in adult patients

López¹,

Valero²,

Bovaira³

et al. 2008

Journal of Clinical Anesthesia

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The Influence of Head and Neck Position on Oropharyngeal Leak Pressure and Cuff Position with the Flexible and the Standard Laryngeal Mask Airway

Cited by 71 publications

References 19 publications

Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion: a randomized controlled trial

Comparison of standard versus 90° rotation technique for LMA Flexible™ insertion: a randomized controlled trial

The Influence of Head and Neck Position on the Oropharyngeal Leak Pressure and Cuff Position of Three Supraglottic Airway Devices

A clinical evaluation of four disposable laryngeal masks in adult patients

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