並列タイトル等喉頭展開における喉頭鏡ブレードと前歯接触部位の荷重に関する検討
一般注記One possible complication of tracheal intubation is injury to the anterior teeth by the laryngoscope blade. We measured pressure where the anterior teeth contacted the blade, and investigated differences in this pressure using six different laryngoscope blades (German design, US design, UK design, English Channel type, reduced flange type and flange-less type). We used a mannequin for intubation training (Laerdal Airway Management Trainer; Laerdal Medical, Tokyo, Japan) and a German bite pressure meter (Nihon Kohden Corporation, Tokyo, Japan). Each laryngoscope blade was used 30 times to perform direct laryngoscopic exposure, and we measured the maximum pressure of the laryngoscope blade on the contact site of the anterior teeth when a Cormack Grade I larynx field of vision had been secured. Because the field of vision of the larynx could be obtained with the flange-less type laryngoscope blade without any contact with the anterior teeth, it was excluded from this analysis. Statistical analysis performed using multiple comparisons (Tukey-Kramer method, p<0.05) showed that contact pressure with the reduced flange type laryngoscope was significantly less than with the other types. These results suggest that laryngoscopes with a narrow blade width cause less pressure and therefore a smaller burden on the contact site of the anterior teeth.
2014年度
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