The Intubation Planes May Affect Safety Or Effectiveness In Tracheal Intubation By ShikaniTM Seeing Optical Stylet

Objective To determinate the difference of intubation planes which may affect safety or effectiveness in tracheal intubation by ShikaniTM Seeing Optical Stylet.Methods Data of in-hospital patients which were performed tracheal intubation by ShikaniTM Seeing Optical Stylet were investigated between 2015-12 and 2016-12.Patients were randomized divided into three groups according to intubation planes which including thyroid cartilage level group(Super Level group,S),0.5cm under thyroid cartilage level group(Middle Level group,M)and piriform recess level(Inferior Level group,I).Data of following were investigated:(1)The basal and maximal heart rate(HR)and systolic blood pressure(SBP)during anesthesia before tracheal intubation and 5 minutes later.Rate of HR and SBP changes were calculated by(maximal-basal)/basal ×100%.Cardiovascular event was defined if rate above 30 percents for HR or SBP.(2)Time required for intubation,intubation success rate,and intubation numbers were recorded.Intubation time was calculated from end of mask ventilation to intermittent positive pressure ventilation.(3)Rate of pharyngalgia,throat bleeding and pneumonia.The normal distribution test was performed in all parameters.The non-normal distribution parameters were transformed by log10.t test,univariate AVNOA and χ2 tests were used for descriptive analyses.All statistical tests were evaluated with the use of 2-tailed 95% confidence levels,and tests with P<0.05 were considered significant.Data analyses were performed with the use of SPSS 13.0 for Windows,release 15,2006(SPSS Inc,Chicago,Ill).Results(1)832 patients were enrolled of which 270,283 and 279 patients were divided into S group,M group and I group,respectively.Successful rate for one-time tracheal intubation accounted 94.34% for patients in M group which higher than other two groups(P<0.05),patients in I group suffered lowest successful rate which was 73.12%.There was difference among three groups in time consumption for intubation which were 36.67±9.06 s,22.68± 4.69 s and 39.12±13.10 s,respectively,for S,M and I group(P<0.05).While there was no difference between S and I groups in time required for intubation.(2)The cardiovascular event for patients in M group was lower than S and I groups.(3)Rate of pharyngalgia and throat bleeding for patients in I group were higher than other two groups.There was no difference between M and S group in rate of pharyngalgia,however,the throat bleeding prevalence was higher in S group.Rate of pneumonia was low and no difference was founded among three groups.Conclusions Intubation planes may affect safety and effectiveness of tracheal intubation.Zero point five centimeter under thyroid cartilage level maybe the optimal one for tracheal intubation by ShikaniTM Seeing Optical Stylet.