## ASA Physical Status Classification Overview **Key Point:** ASA PS classification is a subjective assessment of a patient's preoperative medical status and is independent of the urgency or type of surgery. The classification ranges from ASA PS I (healthy) to ASA PS VI (declared brain-dead). ## ASA PS II Criteria A patient is classified as ASA PS II when they have: - A mild systemic disease - No functional limitation - Well-controlled chronic conditions (e.g., controlled hypertension, well-managed diabetes) - Symptoms confined to the affected system only In this case, the patient has controlled hypertension and well-managed diabetes — both mild systemic diseases with no functional limitation. This clearly places him in ASA PS II. ## Why Option 3 (Emergency Surgery) Is Incorrect **High-Yield:** The ASA PS classification is **independent of surgical urgency**. Whether a patient requires emergency or elective surgery does NOT change their ASA PS grade. A patient's ASA PS remains the same; however, an **"E" suffix** is added to denote emergency status (e.g., ASA PS II-E for an emergency case). The presence of emergency surgery within 24 hours does not reclassify the patient from ASA PS II to a different category — it only adds the "E" modifier. ## Comparison Table: ASA PS Grades | ASA Grade | Definition | Examples | | --- | --- | --- | | PS I | Healthy, no systemic disease | Young, fit patient for minor surgery | | PS II | Mild systemic disease, no functional limitation | Controlled HTN, well-managed DM, mild asthma | | PS III | Severe systemic disease with functional limitation | Poorly controlled DM, symptomatic CAD, severe COPD | | PS IV | Severe systemic disease that is a constant threat to life | Unstable angina, severe aortic stenosis, sepsis | | PS V | Moribund patient, not expected to survive without surgery | Ruptured AAA, massive MI | | PS VI | Declared brain-dead | Organ donor | **Clinical Pearl:** The "E" suffix (emergency) is appended to any ASA PS grade when surgery is performed as an emergency (within 24 hours). This does not change the base PS classification. ## Mnemonic: ASA PS Modifiers **"E = Emergency"** — Emergency status is a modifier, not a reclassifier. A patient's underlying health status (PS I–VI) remains constant; urgency is noted separately.
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