Lecture 3- Hepatic disease Flashcards
Where is the liver located?
Upper right quadrant
Largest internal organ:
Liver
Describe the blood supply to the liver:
dual supply ~20% hepatic artery & 80% portal vein
The hepatic artery delivers:
oxygenated blood
The portal vein delivers:
nutrients
Left & right hepatic ducts form the:
common hepatic duct
The common hepatic duct is responsible for:
draining bile from liver & transports waste from the liver & aids in digestion (by releasing bile)
carries bile from the liver & the gallbladder through the pancreas and into the duodenum:
common bile duct
Where does the common bile duct carry bile (pathway):
- Liver
- gallbladder
- pancrease
- duodenum
The common bile duct is part of the:
biliary duct system
The biliary duct system is formed where the:
ducts from the liver and gall bladder are joined
Where the ducts of the liver and gallbladder join:
biliary duct system (common bile duct is part of this)
The hepatic portal vein goes from the ____ to the ____
GI system to the liver
Drains venous blood from liver to inferior vena cava and onto the right:
hepatic veins
Provides oxygen & nutrition to liver tissues:
hepatic artery
Delivers substance absorbed by the GI tract (stomach, intestines, spleen & pancreas) for metabolic conversion and/or removal in the liver:
Hepatic portal vein
Cells of the liver:
hepatocytes
What is the function of the hepatocytes:
synthesize proteins
Hepatocytes are responsible for synthesizing proteins such as:
- immunoglobulins
- albumin
- coagulation factors
- carrier proteins
- growth factors
- hormones
In addition to synthesizing proteins, hepatocytes also synthesize:
bilirubin
Made from the breakdown of RBCs:
bilirubin
How is bilirubin transported to the liver?
bound to albumin (unconjugated form)
Considered the unconjugated form of bilirubin:
bilirubin bound to albumin
The liver conjugates bilirubin by unbinding the protein (albumin) & binding it to ______
glucose
Bilirubin + albumin =
Bilirubin + glucose =
UNconjugated form
Conjugated form
The hepatocytes produce bile for:
digestion
The hepatocytes produces ____ for fat storage
cholesterol
Bilirubin levels can escalate from:
- blood disorders
- chronic liver disease
- blockage of bile ducts
- hepatitis (viral, ETOH, drug - induced)
- cirrhosis
Blood disorders that increase bilirubin include:
- hemolytic anemia
- sickle cell anemia
- inadequate transfusions
Increased bilirubin results in:
- jaundice
- fatigue
- cutaneous itch
- discolored urine
- discolored feces
A function of hepatocytes is to regulate ____
nutrients
Which nutrients are the hepatocytes responsible for regulating?
- glucose
- glycogen
- lipids
- amino acids
Hepatocytes prepares ____ for excretion
drugs
Responsible for drug conjugation & metabolism:
hepatocytes
Types of liver damage:
- hepatocellular (inflammation & injury)
- cholestatic (obstructive)
- mixed
- cirrhosis (fibrotic, end-stage, acute or chronic)
- neoplastic
Damage to the liver caused by inflammation & injury:
hepatocellular
Damage to the liver caused by obstruction:
cholestatic
Fibrotic or end-stage liver damage that may be acute or chronic:
Cirrhosis
Scarring of the liver in which you start losing hepatocytes:
cirrhosis
T/F: Hepatcellular carcinoma may be an increased risk in patient who have had many viral disease
True
Signs of liver disease include:
- jaundice
- ascites
- edema
- GI bleed
- dark urine
- light stool
- mental confusion
- xanthelasma
- spider angiomas
- palmar erythema
- asterixis
- hyperpigmentation
Symptoms of liver disease include:
- appetite loss
- bloating
- nausea
- RUQ pain
- fatigue
- mental confusion
What is both a sign & symptoms of liver disease?
mental confusion
What can be seen in the following image?
Xanthelasma (cholesterol deposits in the skin- a good indicator that the patient has chronic liver disease)
Fatty cholesterol deposits in the skin; a good indicator the patient has some sort of liver disease
Xanthelasma
What is seen in the following image?
Spider angioma
Capillary fragility seen in the skin, due to lack of clotting factors; increased peripheral endothelial vasculature:
Spider angioma
When the liver is not metabolism ammonia from the body (usually converts ammonia to ammonium so it can be excreted); the ammonia builds up, getting to the brain and causes:
Asterixis
Asterixis is also known as:
flapping tremor
What is a classic sign of hepatic encephalopathy (HE)?
Asterixis
Describe asterixis:
jerky movements when the hands are extended at wrists
What can be seen in the following image?
Asterixis
Sign associated with poor ammonium metabolism:
Asterixis
A syndrome of altered neurologic function related to dysregulation of metabolism seen almost exclusively in patients with severe liver disease:
Hepatic encephalopathy (HE)
HE can be a chronic problem in patients with _____, managed medically to varying degrees of success, punctuated with occasional exacerbations
cirrhosis
T/F: Although acute exacerbations of HE are rarely fatal, they are a frequent cause of hospitalization among patients with cirrhosis
True
What are some blood tests that can determine general liver function?
- CBC
- CMP (comprehensive metabolic panel)
List some SPECIFIC liver function tests:
- lipid panel
- VDRL
- PSA (prostate specific antigen)
- SARS antigen & antibody
- HIV
- Hep B
- Bleeding times
Test that evaluates the cells that circulate in the blood:
CBC
What cells are evaluates on a CBC:
- RBC
- WBC
- PLTs
A CBC is an indicator of:
overall health
A CBC may detect a variety of diseases & conditions including:
- infection
- anemia
- leukemia
- lymphoma
- neutropenia
CMP:
Comprehensive metabolic panel
A CMP may also be called:
chemical screen or SMAC 14 (Sequential multiple analysis- computer)
A CMP consists of _____ blood tests which serve as:
14 blood tests; initial broad medical screening tool
A CMP includes:
- general tests
- kidney function assessment
- electrolytes
- proteins tests
- liver function assessment
Why are CMPs (Chemical screen/SMACs) a good general test for the patients overall health?
Because they look at multiple organ systems
In terms of assessing liver function, the following proteins are good indicators of liver health:
- bilirubin
- alkaline phosphatase (ALP)
- transaminases
- albumin
- globulin
Bilirubin is a product of:
heme breakdown
Increased total bilirubin = increased:
severity of liver injury
Bilirubin that is insoluble, bound to albumin, not filtered by kidney:
unconjugated (indirect)
T/F: with unconjugated bilirubin, increased SERUM is not really indicative of liver disease
True
Form of bilirubin that indicates hemolysis, ineffective erythropoiesis (thalassemia, vitamin B deficiency, Gilbert syndrome)
Unconjugated (indirect)
T/F: With conjugated bilirubin, increased SERUM levels is NOT really indicative of liver disease
False- this is indicative of liver disease
The form of bilirubin that is water-soluble and excreted by the kidney:
Conjugated (direct)
All _____ bilirubin is conjugated
URINE
A protein involved with bone metabolism that is not specific to liver disease but may indicate cholestatic disease:
alkaline phosphatase (high)
This protein is altered in multiple disease condition, but especially bone neoplasms:
Alkaline phosphatases
AST, ALT and GGT are all:
transaminases (liver enzymes needed for protein synthesis & specific to liver function)
High levels of transaminases (AST, ALT, GGT) indicates:
Damage to hepatocytes from hepatocellular disease
T/F: High levels of transaminases (AST, ALT, GGT) are individually proportionally reflective of severity of liver damage
False- NOT individually proportionally reflective
What transaminase is more indicative of cholestatic disease (blockage) & alcoholic liver disease?
GGT
AST:ALT ratios are more informative; the ____ the ratio, the more specific an indicator of hepatic disease
lower
Synthesized exclusively by hepatocytes:
albumin