Anesthesia-associated factors of lower respiratory tract jnfection in general anesthesia with tracheal intubation

Objective To evaluate anesthesia-associated factors of lower respiratory tract infection in patients with tracheal intubation general anesthesia. Methods By case-control study, all the patients in a hospital with lower respiratory tract infection after tracheal intubation general anesthesia in the past 5 years were investigated retrospectively, interfering factors were excluded, the odds ratio (OR) and 95% confidence interval of related factors of the way of intubation, blind intubation the skill of practitioner, depth of intubation, indication of decannulation and delayed decannulation were calculated and analysed, the relationship of them to lower respiratory tract infection were evaluated. Results The value of OR of over-deep intubation,unpracticed intubation, improper indication of decannulation,delayed decannulation 3 hours was 2.15,2.02,2.18,3.4 respectively, there was great statistical significance; the value of OR of delayed decannulation 3 hours ,peroral intubation, blind intubation was 1.10,1.53,1.86 respectively, there was no statistical significance. Conclusion It is suggested that unskilled performance, over-deep intubation, delayed decannulation 3 hours and improper indication of decannulation were risk factors for lower respiratory tract infection in patients with tracheal intubation general anesthesia.