title: A randomised crossover trial comparing a single-use polyvinyl chloride laryngeal mask airway with a single-use silicone laryngeal mask airway.
abstract: We compared insertion rates of single-use polyvinyl chloride laryngeal mask airways (LMAs) vs single-use silicone LMAs in 72 anaesthetised patients. Both airways were produced by Flexicare Medical. Laryngeal mask airway insertion was successful on the first attempt in 68/72 (94%) polyvinyl chloride LMAs vs 64/72 (89%) silicone LMAs (p = 0.39). Overall insertion rates were 72/72 (100%) for the polyvinyl chloride LMAs and 71/72 (99%) for the silicone LMAs (p = 1.0). Mean (SD) insertion times were similar for polyvinyl chloride and silicone LMAs: 24.3 (5.1)s vs 24.8 (7.8)s (p = 0.64). Laryngeal mask airway position, as assessed using a fibrescope, was not different (p = 0.077). The median (IQR [range]) leak pressure was 16 (12-20 [6-30]) cmH(2) O for the polyvinyl LMA and 18 (13-22 [6-30]) cmH(2) O or the silicone LMA (p = 0.037). In conclusion, we did not find any important differences between polyvinyl chloride and silicone laryngeal mask airways.
authors.affiliation: Department of Anaesthetics, Intensive Care and Pain Medicine, Cardiff and Vale UHB, Cardiff, UK. cerebellum100@hotmail.com
authors.forename: S F
authors.initials: SF
authors.lastname: Bell
authors.forename: N G
authors.initials: NG
authors.lastname: Morris
authors.forename: A
authors.initials: A
authors.lastname: Rao
authors.forename: A R
authors.initials: AR
authors.lastname: Wilkes
authors.forename: N
authors.initials: N
authors.lastname: Goodwin
mesh_terms: D000328:Adult; D018592:Cross-Over Studies; D004209:Disposable Equipment; D004867:Equipment Design; D005260:Female; D006801:Humans; D017214:Laryngeal Masks; D008297:Male; D011143:Polyvinyl Chloride; D012828:Silicones
chemical_list: D012828:Silicones; D011143:Polyvinyl Chloride