Liver - Part 2 Flashcards
What are the 3 vascular components for the liver?
- Hepatic arteries
- Hepatic veins
- Portal veins
How much blood goes through the hepatic artery?
30%
Where does the hepatic artery lie? (2)
- Medial to the common hepatic duct
2. Anterior to the main portal vein
What is the normal diameter of the proper hepatic artery?
2-4mm
Where does the hepatic veins empty into?
IVC
- deoxygenated blood
What does the left portal vein subdivide into?
Left medial and lateral portal veins
What does the right portal vein subdivide into?
Right anterior and posterior portal veins
How much blood goes through the portal veins?
70%
What is the normal diameter of the MPV?
Should not exceed 13mm
Is the liver intra or retroperitoneal?
Intra
Where does the caudate lie compared to the IVC?
Anterior and medial to the IVC
What are 2 left lobe variants?
- Extension into the LUQ
2. Small left lobe
What are 3 differential diagnosis for left lobe variants?
- Splenomegaly
- Hepatomegaly
- Splenic neoplasm
Riedel lobe
Extension of the right lobe
Is Riedel lobe more common in males of females?
Females
What are 2 differential diagnosis for riedal lobe?
- Hepatomegaly
2. Renal neoplasm
What are the normal measurements for the liver? (length, height and width)
Length = 7-17cm Height = 10-12.5cm Width = 20-22.5cm
What can cause hepatomegaly? (7)
- Congestive heart failure
- Inflammatory processes
- Polycystic disease
- Fatty infiltration
- Biliary obstruction
- Neoplasm
- Budd-Chiari syndrome
What are the clinical findings of hepatomegaly? (3)
- Asymptomatic
- RUQ pain
- Palpable RUQ mass
What measurements indicate hepatomegaly?
Length exceeding 18cm
What are 3 differential diagnosis for hepatomegaly?
- Riedel lobe
- Left lobe variant
- Technical error
What is the US appearance of the liver? (3)
- Homogeneous
- Moderately echogenic
- Smooth parenchyma
What kind of blood flow happens in the portal veins? (2)
- Phasic
2. Hepatopetal
What kind of blood flow happens in the hepatic veins? (2)
- Multiphasic
2. Hepatofugal
