5. Assessment of Dehydration Features Mild Severe (1) Patient’s appearance Thirsty, alert and restless Drowsy, sweaty, cold, may be comatose (2) Radial pulse Normal rate and volume Rapid, feeble, sometimes inpalpable (3) Blood pressure Normql Less than 80mmHg (4) Skin elasticity Pinch retracts immediately Pinch retracts very slowly (5) Tongue Moist Very dry (6) Anterior fontanelle Normal Very sunken (7) Urine flow Normal Little or none % body weight loss 4-5% 10% or more Estimated fluid deficit 40-50ml/kg 100-110ml/kg