The Portex 'Soft Seal' single use laryngeal mask -- a preliminary study in pediatric anesthesia
Related Experiment Video
Updated: Aug 19, 2026

Laryngeal Mask Airway (LMA) Placement in a Neonatal Patient Simulator Using a Non-Inflatable Supraglottic Airway (SGA)
Published on: July 14, 2023
1Anaesthetic Department, Great Ormond Street Hospital, London, UK. glaish@gosh.nhs.uk
Background:
Portex have developed a single use pediatric laryngeal mask (LM), which is available in all sizes.
Methods:
We prospectively evaluated its use in 40 infants and children undergoing a variety of surgical procedures.
Results:
The LM provided a satisfactory airway in all patients. Insertion was quick and easy and achieved at the first attempt in 38 patients. Repositioning was required during anesthesia in four cases.
Conclusions:
The Portex 'Soft Seal' LM performs satisfactorily in elective pediatric anesthesia.
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