Liver function tests: Difference between revisions
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===Normal Values=== | ===Normal Values=== | ||
*ALT: 7 - 55 U/L | |||
ALT: 7 - 55 U/L | *AST: 8 - 48 U/L | ||
AST: 8 - 48 U/L | *Alk Phos: 45 - 115 U/L | ||
Alk Phos: 45 - 115 U/L | *Albumin: 3.5 to 5.0 g/dL | ||
Albumin: 3.5 to 5.0 g/dL | *Total protein: 6.3 - 7.9 g/dL | ||
Total protein: 6.3 - 7.9 g/dL | *Bilirubin: 0.1 - 1.2 mg/dL | ||
Bilirubin: 0.1 - 1.2 mg/dL | *GGT: 9 - 48 U/L | ||
GGT: 9 - 48 U/L | *LD: 122 - 222 U/L | ||
LD: 122 - 222 U/L | *PT: 11 - 14 seconds | ||
PT: 11 - 14 seconds | *PTT: 25 - 35 seconds | ||
PTT: 25 - 35 seconds | *INR: 0.8 - 1.2 | ||
INR: 0.8 - 1.2 | |||
==Interpretation== | ==Interpretation== | ||
Revision as of 13:30, 30 August 2016
Background
A liver function test is a group of blood tests that, when evaluated as a whole, allow the clinician to determine if there is any damage to the liver, determine if that damage is acute or chronic, and determine if there is hepatobiliary stasis for any reason. The essential components of an LFT includes liver transaminases (AST, ALT), which are surrogates markers of liver health, coagulation studies (PT, PTT, INR), albumin, total protein, lactate dehydrogenase, and liver enzymes GGT and Alkaline Phosphatase which, in conjunction with direct and total bilirubin, are surrogate markers of biliary patency and function.
Normal Values
- ALT: 7 - 55 U/L
- AST: 8 - 48 U/L
- Alk Phos: 45 - 115 U/L
- Albumin: 3.5 to 5.0 g/dL
- Total protein: 6.3 - 7.9 g/dL
- Bilirubin: 0.1 - 1.2 mg/dL
- GGT: 9 - 48 U/L
- LD: 122 - 222 U/L
- PT: 11 - 14 seconds
- PTT: 25 - 35 seconds
- INR: 0.8 - 1.2