Objective: The objective of the present study was to evaluate the incidence of all complications and contributing factors after receiving anesthesia within HRH Princess Maha Chakri Sirindhorn Medical Center.
Materials and Methods: This prospective descriptive study included 2,285 patients who received anesthesia services from the Department of Anesthesiology. Data was collected from August 2019 to January 2020 and analyzed with STATA software version 15.
Results: In 2,285 patients who received anesthesia services, there were a total of 1,180 complications, which represented in an incidence rate of 51.64%. More than half of these complication were preventable. 93.42% were minor adverse events. The majority of the population was adult age over 18 years old, with average age of 47.8 years old. Most were female (59.17%), ASA class 2 (43.19%) and received general anesthesia technique (48.89%). The most common anesthetic complications were hypotension, sore throat, nausea/vomiting and shivering respectively. The most common major anesthetic complication was cardiac arrhythmia.
Conclusion: The incidence rate of anesthetic complication was 51.64%. The most common complications were hypotension,
nausea/vomiting and shivering. Factors that contributed to anesthetic complications were female gender, age >65, pregnancy, long operative time, and positions other than supine. Factors that minimized the risk were minor operation, TIVA and other anesthesia techniques and supervision.

Keywords: Anesthesiology; Safety; Complications; Postoperative; Perioperative; Operation; Patient