title: Efficacy of the laryngeal tube by inexperienced personnel.
abstract: We compared the laryngeal tube and the laryngeal mask in the ease of insertion, ventilation volume and the incidence of gastric insufflation by inexperienced personnel. In a randomized, cross-over design, each of 28 students of a Fire Defense Academy attempted to insert the laryngeal tube and laryngeal mask in turn using an airway management trainer manikin. A self-inflating bag (2000 ml) was attached and ventilation volume was measured. The number of attempts at the insertion and the presence or absence of gastric insufflation were also recorded. After completion of the study, each student was asked whether insertion of one device was easier than the other. All 28 students could insert the laryngeal tube at the first attempt. As for the laryngeal mask, 27 could insert it at the first attempt, whereas the remaining one student could insert it after two attempts. The tidal volume was significantly greater for the laryngeal tube (median 842 ml) than the laryngeal mask (median 716 ml) (95%CI for median difference: 10-116 ml; P < 0.02). The incidence of gastric insufflation was significantly lower for the laryngeal tube (2 times) than for the laryngeal mask (10 times) (P < 0.05). Twenty six of 28 students stated that insertion of the laryngeal tube was easier than insertion of the laryngeal mask, whereas the remaining two stated that there was no difference in the ease of insertion between two devices. Therefore, the laryngeal tube has a potential role in providing a clear airway during cardiopulmonary resuscitation.
authors.affiliation: Department of Anesthesiology, Kansai Medical University, 10-15 Fumizono-cho, Moriguchi City, Osaka 570-8507, Japan. asait@takii.kmu.ac.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Asai
authors.forename: Ikuriho
authors.initials: I
authors.lastname: Hidaka
authors.forename: Shoji
authors.initials: S
authors.lastname: Kawachi
mesh_terms: D000328:Adult; D000488:Allied Health Personnel / Q000193:education*; D016887:Cardiopulmonary Resuscitation / Q000193:education / Q000295:instrumentation*; D002983:Clinical Competence; D016001:Confidence Intervals; D003430:Cross-Sectional Studies; D004517:Education, Professional / Q000379:methods*; D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation / Q000379:methods*; D017214:Laryngeal Masks; D008297:Male; D008348:Manikins; D011336:Probability; D012121:Respiration, Artificial / Q000295:instrumentation / Q000379:methods*; D018570:Risk Assessment; D018709:Statistics, Nonparametric