^ASA physical status	^I	^II	^III	^IV	^V	^VI	^
|Definition	|Healthy	|Mild systemic disease	|Severe systemic disease but not incapacitating	|Incapacitating disease	|Dying	|Declared brain death	|
|Age	|> 3 months to < 65 years	|≤ 3 months or ≥ 65 to 84 years	|≤ 1 month preterm NB or ≥ 85 years	|		
|Functional capacity; walk up 1 flight of stair or 200 m. on the level	|Complete without distress	|Rest at completion because of distress	|Stop en route because of distress	|Unable to do		|
|Medical status	|No organic, physiologic, or psychiatric disturbance	|Single/multiple systemic disease(s) with good control No functional limitations or vital organ involvement	|Poorly controlled systemic disease(s) Some functional limitations No immediate life threatening condition	|Poorly controlled systemic disease(s) Significant functional limitation Constant potential threat to life	|End stage disease(s) and not expected to survive within 24 hours	|Clinically dead patients awaiting organ harvest	|
|Mortality rate (%)	|0.06 – 0.08	|0.27 – 0.4	|1.8 – 4.3	|7.8 – 23	|9.4 – 51	|
|Physiological status	|Normal healthy patient	|Healthy pregnant woman Active allergies	|Pre-existing disease in pregnancy, GDM, PIH, Mild pre-eclampsia	|Severe preeclampsia, Eclampsia, HELLP syndrome		|
|CVS	|	|HT with BP < 140/90 mmHg	|BP > 180/110 mmHg Stable angina MI > 6 months / Cardiac arrhythmia without hemodynamic instability Compensated heart failure EF 25% - 50%	|Unstable angina Acute MI MI <6 months Uncontrolled cardiac arrhythmias with hemodynamic instability Severe heart failure EF < 25%	|Ruptured aortic aneurysm Sepsis syndrome with hemodynamic instability S/P CPR	|
|RS	|	|Well controlled asthma (attack < 1 per week) Heavy smoker (> 20 pack year) without COPD	|Stress-/ exercise- induced or hospitalized asthma COPD on medications	|Asthma or COPD with exacerbation	|	
|CNS	|	|Well controlled epilepsy Parkinsonism Dementia Alzeihmer’s disease GCS > 13	|Stroke > 6 months with or without neurologic sequelae GCS 9 to 12	|Uncontrolled epilepsy Stroke < 6 months or bed-ridden status GCS < 8		|
|Endocrine	|	|Well controlled diabetes of any type Controlled hyper- or hypothyroidism with clinically euthyroidism Obesity class II (BMI 35 – 39.99)	|Poor controlled diabetes Symptomatic hypo/hyperthyroidism Obesity class III or morbid obesity (BMI 40 – 44.99)	|DKA / Hyperosmolar nonketotic acidosis Thyroid crisis Obesity class IV (BMI ≥ 45 )	|	
|GI	|	|Cirrhosis child A Significant liver enzyme abnormality	|Cirrhosis child B	|Cirrhosis child C	|Hepatic encephalopathy	|
|Hematology	|	|Anemia (Hct < 30%) Thalassemia minor e.g. Thalassemia trait, Hb E, Hb CS, Hb H Platelet 50,000100,000 INR 1.2-1.5	|Symptomatic anemia (Hct < 25%) Thalassemia major Platelet < 50,000 INR > 1.5	|Platelet < 50,000 r INR > 1.5 with bleeding	|DIC	|
|Renal	|	|Renal impairment CKD stage 1-2 Asymptomatic electrolyte imbalance	|CKD stage 3-5 ESRD Symptomatic electrolyte imbalance	|ESRD with volume overload or uremia Hepatorenal syndrome		|
|Others	|	|SIRS Malnutrition (BMI < 16.5) Hypoalbuminemia (albumin < 2.5)	|Septicemia	|Septic shock	|MODS	|