ASA Physical Status Classification and Comprehensive Assessment of Anesthetic Risk

Abstract

Preoperative risk assessment is a fundamental component of modern anesthesiology and plays a decisive role in ensuring patient safety and improving surgical outcomes. Among various tools developed for this purpose, the American Society of Anesthesiologists (ASA) Physical Status Classification System remains the most widely used worldwide. The system categorizes patients according to their physical condition and systemic diseases, allowing anesthesiologists to estimate perioperative risk in a standardized manner. This article provides a comprehensive and detailed review of the ASA classification, including its historical development, structure, clinical applications, advantages, limitations, and relevance in contemporary anesthetic practice. Furthermore, the importance of combining the ASA classification with other objective risk assessment tools is emphasized. Despite its simplicity, the ASA classification continues to be a cornerstone of preoperative evaluation when applied as part of a holistic clinical assessment.