90° Rotation Technique for LMA FlexibleTM Insertion

NCT ID: NCT03028896

Last Updated: 2022-02-09

Study Results

Results available

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

132 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-04-02

Study Completion Date

2017-01-19

Brief Summary

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The 90° rotation technique is known to improve the success rate of conventional LMA but its effect in LMA FlexibleTM is not known. We tried to find if 90° rotation technique could increase the first attempt success rate of the insertion of LMA FlexibleTM compared to standard technique.

Detailed Description

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One hundred and sixteen adult patients undergoing breast surgery were randomized to the two insertion techniques. The ease of insertion was assessed by the success rate at the first attempt. Heart rate and mean blood pressure were recorded 1 min before and 1 min after insertion. Postoperative complications were checked.

Conditions

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Laryngeal Masks

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

OTHER

Blinding Strategy

TRIPLE

Participants Caregivers Outcome Assessors

Study Groups

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standard

In the neck flexed and the head extended position, hold mask like a pen with the index finger placed anteriorly at the junction of the cuff and tube, push the mask backwards maintaining pressure against the palate until resistance is felt.

Group Type NO_INTERVENTION

No interventions assigned to this group

rotational

After insertion of the entire cuff inside the mouth, the LMA FlexibleTM was rotated counter-clockwise through 90° and was advanced through the right side of the tongue until the resistance was felt, and then was returned back in the hypopharynx.

Group Type EXPERIMENTAL

90° rotational technique

Intervention Type PROCEDURE

the LMA FlexibleTM was rotated counter-clockwise through 90°

Interventions

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90° rotational technique

the LMA FlexibleTM was rotated counter-clockwise through 90°

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* American Society of Anesthesiologists class I - II
* Scheduled for elective breast surgery under general anaesthesia using LMA FlexibleTM

Exclusion Criteria

* known difficult airway
* mouth opening less than 2.5 cm
* limited extension of neck
* recent sore throat
* gastroesophageal reflux disease
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

No

Sponsors

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Seoul National University Bundang Hospital

OTHER

Sponsor Role lead

Responsible Party

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BON WOOK KOO

associator professor

Responsibility Role PRINCIPAL_INVESTIGATOR

References

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Koo BW, Oh AY, Hwang JW, Na HS, Min SW. Comparison of standard versus 90 degrees rotation technique for LMA Flexible insertion: a randomized controlled trial. BMC Anesthesiol. 2019 Jun 7;19(1):95. doi: 10.1186/s12871-019-0773-z.

Reference Type RESULT
PMID: 31170926 (View on PubMed)

Other Identifiers

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SNU-LMA

Identifier Type: -

Identifier Source: org_study_id

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