Objective To investigate the risk factors for postoperative arytenoid dislocation. Methods From September 2003 to August 2013

the records of 16 patients with a history of postoperative arytenoid dislocation were reviewed. Patients matched in terms of date and type of procedures were chosen as the controls (n=16). Recorded data for all patients were demographics

smoking status

alcoholic status

preoperative physical status

airway evaluation

intubation procedures

preoperative laboratory test results

anesthetic consumption and intensive care unit stay. For arytenoid dislocation cases

we further analyzed the incidences of the left and right arytenoid dislocation

and the outcomes of surgical repair and conservative treatment. Categorical variables were presented as frequencies and percentages

and were compared using the chi-squared test. Continuous variables were expressed as means±SD and compared using the Student’s unpaired t-test. To determine the predictors of arytenoid dislocation

a logistic regression model was used for multivariate analysis. Results Sixteen patients with postoperative arytenoid dislocation were enrolled

with a median age of 52 years. Most postoperative arytenoid dislocation patients (15/16

93.75%) received surgical repair

except one patient who recovered after conservative treatment. None of the postoperative arytenoid dislocation patients were smokers. Red blood cell (P=0.044) and hemoglobin (P=0.031) levels were significantly lower among arytenoid dislocation cases compared with the controls. Conclusions Non-smoking and anemic patients may be susceptible to postoperative arytenoid dislocation. However

neither of them was independent risk factor for postoperative arytenoid dislocation.