Application of 128 slice spriral CT in the measurement of anatomy of facial nerve canal before cochlear implantation / 中国基层医药

ABSTRACT

Objective To take the imaging anatomy and measurement of facial nerve canal for cochlear implantation patients,and to provide the reference for how to avoid the injury of facial nerve in the opreration.Methods 35 patients which would be given to cochlear implantation were taken 128 thin-slice CT scan preoperative,then using multi planar reformation (MPR) and curved planar reformation (CPR) techniques,the three-dimensional reconstruction were carried out,and referring the facial nerve anatomy of posterior tympanic facial recess approachartificial cochlear implantation,the relationship between the vertical segnent of facial nerve canal and facial recess,tympanic cavity structure was key displayed.The facial nerve canal sections in temporal bone were measured,and compared with measurement results of 35 cases of cochlear implant patients.Results 35 patients underwent 128-slice CT scan three-dimensional reconstruction of MPR and CPR techniques,the facial nerve segment was clearly displayed,and its vertical section of the posterior wall of the external auditory canal,facial recess distance was (3.31 + 0.88)mm,(1.89 + 0.29) mm,respectively,and the vertical segment of the facial nerve canal wall,the facial recess distance of intraoperative measurement was (3.22 + 0.69) mm,(1.85 + 0.26) mm,respectively,and there were.no significant difference between the the both results(all P ＞ 0.05).35 patients had no case of face paralysis.Conclusion 128-slice spiral CT thin scan combined with MPR and CPR techniques can understand the facial nerve canal and surrounding anatomical landmarks of the fine relationship,measurable facial nerve canal length,and provide basis for how to avoid facial nerve injury in the cochlear implant,temporal bone,and the other side of the skull base surgery.