OBJECTIVE:To evaluate the effect on intubation success of different bent lengths of a lightwand (a malleable illuminating stylet used for intubation), based on the patient's thyroid prominence-tomandibular angle distance (TMD), thyroid prominence-to-incisor distance (TID) and gender. METHODS: This prospective, randomized, blinded study included patients undergoing elective surgery. In group A, the bent length was determined based on the patient's gender. In groups B and C, the bent length was calculated according to the patient's TMD or TID, respectively. Intubation success rate, time required for intubation, haemodynamics and complications postintubation were documented. RESULTS: A total of 246 patients were recruited and randomly assigned to one of the study groups. There were no significant differences in number of intubation attempts and success rate among the three groups. The mean time required for intubation was significantly shorter in group A than in the other groups.There were no major complications in any group. CONCLUSIONS: Gender-determined bent length was more suitable for lightwandguided intubation than TID or TMD. For most patients, the optimal bent length was in the range of 6.0 -6.9 cm.
Objective: To investigate the continuous humidification tube insertion depth of endotracheal intubation and the flow rate of the wetting effect. Methods: From October 2008 to May 2010, among 132 patients of oral and maxillofacial surgery with tracheal intubation, continuous infusion can be adjusted to the wet method; according to the wet pipe, insertion depth of the flow rate is divided into four groups, by four different depths and velocities of the wetting effect, to be analyzed. Results: B group was significantly lower than other groups satisfied with indicators of four significantly different effects of humidification. Conclusion: When continuous humidification tube insertion depth of endotracheal intubation is 10 -12 cm, and flow rate is 15 -20 ml/h, the wetting effect will achieve greater satisfaction.
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