Critical Values (Panic Values) are laboratory results that indicate a life threatening situation for the patient . Urgent notification of acritical value to the appropriate healthcare professional is necessary . **Critical values in newborn and children(<18 Year)** ^Sr No^Name Of Test^Lower Limit^Upper Limit^Units^ ^1^Albumin^1.7^6.8^g/dl^ ^2^Billirubin^-^15^mg/dl^ ^3^Creatinine^-^3.8^mg/dl^ ^4^Glucose^45^445^mg/dl^ ^5^Glucose In Csf^31^^mg/dl^ ^6^Potassium^2.8^7.8^mEq/L^ ^7^Protein^3.4^9.5^g/dl^ ^8^Protein In Csf^-^188^mg/dl^ ^9^Urea^-^118^mg/dl^ ^10^Uric Acid^-^12^mg/dl^ **References:** - TIETZ Textbook Of Clinical Chemistry & Molecular Diagnostics ,4th Edition :Burtis ,Ashwood ,Burns :Table 56-3,P:2317 ---- Critical Values (Panic Values) are laboratory results that indicate a life threatening situation for the patient . Urgent notification of acritical value to the appropriate healthcare professional is necessary . **Critical values in adults** ^Sr No^Name Of Test^Lower Limit^Upper Limit^Units^ ^1^Amylase^---^200^U/L^ ^2^Calcium Ionized^0.75^1.6^mmol/L^ ^3^Chloride^80^120^mEq/L^ ^4^Ck-Mb^---^>5% OF TOTAL CK^U/L^ ^5^Creatinine^---^5.0^mg/dl^ ^6^Glucose^45^450^mg/dl^ ^7^Glucose In Csf^40^200^mg/dl^ ^8^Potassium^2.8^6.2^mEq/L^ ^9^Sodium^120^160^mEq/L^ ^10^Urea^---^171^mg/dl^ ^11^Uric Acid^---^13^mg/dl^ **References:** - TIETZ Textbook Of Clinical Chemistry & Molecular Diagnostics ,4th Edition :Burtis ,Ashwood ,Burns :Table 56-3,P:2317 - Interpretation of diagnostic tests by Jacques Wallach:6th edition :chapter -2 :p-29.