Comparison of the laryngeal mask airway supreme and the i-gel in paralysed elderly patients: A randomised controlled trial

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Abstract

BACKGROUND

The laryngeal mask airway supreme (LMA-S) and i-gel are both popular second-generation supraglottic airway devices that have been widely studied in surgical patients, but their differences in clinical performance in the elderly are not clear.

OBJECTIVE

We compared the efficacy and safety of the LMA-S and i-gel in anaesthetised and paralysed elderly patients.

DESIGN

A randomised study.

SETTING

Single-centre trial, study period January 2014 from to October 2016.

PATIENTS

One hundred and six elderly patients who underwent urological or orthopaedic surgery with an expected duration less than 2 h.

INTERVENTION

Patients were allocated to either the LMA-S (n = 53) or i-gel (n = 53) group. All insertions were performed in a standardised manner according to the manufacturers’ instructions.

MAIN OUTCOME MEASURES

Our primary endpoint was the rate of successful insertion at the first attempt. The adequacy of positive pressure ventilation and airway sealing, fibreoptic laryngoscopy grades and stability of airway maintenance during anaesthesia were also assessed.

RESULTS

Although the rate of successful insertion at the first attempt was similar between the two groups (94.3 vs. 82.7%, P = 0.072), more patients required device manipulation during insertion with the LMA-S than the i-gel (42.3 vs. 18.9%, P = 0.011). Good fibreoptic laryngoscopy grades were significantly more common with the i-gel than the LMA-S (79.3 vs. 55.8%, P = 0.042), and peak inspiratory pressures were lower in the i-gel group both immediately after insertion and at the end of surgery. Leak pressures were significantly higher in the i-gel group than the LMA-S group, both immediately after insertion and at the end of surgery (25.8 vs. 23.0, P = 0.036; and 28.1 vs. 23.7, P < 0.001, respectively).

CONCLUSION

Both the LMA-S and i-gel were used successfully and safely in elderly patients. However, the i-gel demonstrated better airway sealing than the LMA-S at insertion and during maintenance of anaesthesia.

TRIAL REGISTRATION

NCT02026791 at clinicaltrial.gov.

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