Where does the liver receive blood from?
Receives blood from GI tract via the portal vein and from the hepatic artery
What are the metabolic functions of the liver?
Is the following statement true or false?
The majority of blood supply to the liver, which is poor in nutrients, comes from the portal vein.
False
Rationale: The majority of blood supply to the liver, which is rich in nutrients from the gastrointestinal tract, comes from the portal vein.
If patients are having liver issues, what labs are expected to be ordered?
Elevated bilirubin levels are commonly associated with what clinical condition? (Table 43-1)
Jaundice
Why is albumin important in liver disease? (Table 43-1)
Albumin is produced by the liver; low levels indicate impaired liver function.
Low albumin levels are commonly seen in which liver conditions? (Table 43-1)
Cirrhosis
Chronic hepatitis
Ascites
Why does PT/INR increase in liver disease? (Table 43-1)
The liver produces clotting factors, so damage impairs clotting factor synthesis.
What do elevated AST and ALT indicate? (Table 43-1)
Liver cell injury or hepatocellular damage.
Elevated GGT is commonly associated with what condition? (Table 43-1)
Alcohol abuse and biliary obstruction.
Elevated alkaline phosphatase usually indicates what condition? (Table 43-1)
Biliary tract obstruction.
Why does ammonia increase in liver disease? (Table 43-1)
The liver cannot convert ammonia to urea.
Elevated ammonia levels can lead to what serious complication? (Table 43-1)
Hepatic encephalopathy.
Which lab value best indicates liver synthetic function?
PT/INR and albumin
Which lab suggests biliary obstruction?
Alkaline phosphatase
Which lab is associated with hepatic encephalopathy?
Ammonia
Alanine aminotransferase (ALT) levels increase primarily in :
Liver disorders.
Used to monitor the course of hepatitis, cirrhosis, and the effects of treatments/drugs that may be toxic to the liver
True / False
Aspartate aminotransferase (AST) is specific to liver diseases.
False
Not specific to liver diseases; however, levels of AST may be increased in cirrhosis, hepatitis, and liver cancer
Apart from Labs, what additional diagnostic studies of the liver can we do?
When assessing a patient w/ suspected liver disease, what physical assessments should we do?
In patients w/ suspected liver disease, what health history do we want to know about in our assessment?
Why do patients with liver disease look Jaundice?
Due to elevated bilirubin in the blood.
Liver excrete bilirubin.
Bilirubins is attempting to get into the bile duct and GI, to be excreted in feces, however if there is a blockage in the ducts bilirubin will build up
What is Portal HTN assiciated with?
Hepatic cirrhosis.
Caused by backflow and obstruction.
This will eventually lead to Ascites and Esophageal varices
What can hepatic encephalopathy lead to?
Coma