90° Rotation Technique for LMA FlexibleTM Insertion

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Seoul National University

Status

Completed

Conditions

Laryngeal Masks

Treatments

Procedure: 90° rotational technique

Study type

Interventional

Funder types

Other

Identifiers

NCT03028896
SNU-LMA

Details and patient eligibility

About

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.

Full description

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.

Enrollment

132 patients

Sex

Female

Ages

18 to 65 years old

Volunteers

No Healthy Volunteers

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

Trial design

Primary purpose

Other

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Triple Blind

132 participants in 2 patient groups

standard
No Intervention group
Description:
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.
rotational
Experimental group
Description:
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.
Treatment:
Procedure: 90° rotational technique

Trial contacts and locations

0

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Data sourced from clinicaltrials.gov

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