Changes Of Acoustic Parameters From Patients Undergoing Endotracheal Intubation Under General Anesthesia

Objective: This paper aims at analyzing the impact of endotracheal intubation on the patients’ voice and observing the variation law of the acoustic parameters which,with the help of computer acoustic detection,were obtained before and after the endotracheal intubation on the adult patients under general anesthesia.Methods:(1)Choose cases.52 cases of patients undergoing elective ear surgery of endotracheal intubation under general anesthesia in The Second Hospital of Hebei Medical University from January,2017 to October,2017 were chosen.All the patients are adult with normal voice and having no habits of smoking and drinking,laryngeal disease,history of voice disorder,nervous system disease,neither do they have throat discomfort and respiratory system diseases within latest 3 months.Lesion on oral cavity,oropharynx,laryngeal,nasopharynx and nasal cavity shall be excluded before the surgery,and aerosol inhalation or other special treatments on the laryngeal shall not be conducted before and after the surgery.(2)Method.Adopt acoustic analysis of voice,including parameters like,FO,Jitter,Jita,Shimmer,APQ and NHR.Result: Only Jitter and Jita values are statistically significant with P<0.05 at day 1 after extubation.There is no obvious variation of FO value before and after the intubation surgery.Other parameters are not statistically significant with P>0.05,however,they do have same variation laws that the values increase at day 1 after extubation,but decrease to the same level as before intubation surgery at day 3.Refer to table 1 for details.Summary:Transient changes may occur on some of the acoustic parameters after endotracheal intubation under general anesthesia,but significant changes on pitch and acoustic fidelity are not found,which indicates that endotracheal intubation surgery has no impact on the patients’ voice.