Ch. 3 The Gallbladder Flashcards
Where is the gallbladder located in the body?
Posterior to the right lobe of the liver within the gallbladder fossa
Useful landmark to locate the gallbladder fossa is the main lobar fissure
True of false: Is gallbladder a intraperitoneal organ?
True
What does the gallbladder store?
bile that is produced in the liver
What are the 3 layers of the gallbladder?
mucosal (innermost layer-consists of multiple folds and rugae)
musculosa (fibromuscular layer)
serosal (outer)
What are the 3 parts of the gallbladder (anatomy)?
Neck, body, and fundus
the neck of the gallbladder is continuous with
cystic duct
What is the role of the cystic duct of the gallbladder?
It connects the gallbladder to the rest of the biliary system
What is the function of the biliary tree?
provide a conduit for bile to drain from the liver into the small intestine
Where in the gallbladder is the most common location for gallstones?
Fundus
What is the post dependent part of the gallbladder?
Fundus
What is the hormone that causes the bladder to contract?
Cholecystokinin
What is the name of the most common variant of the gallbladder shape?
Phrygian cap (folding of the fundus)
The right and left hepatic ducts eventually unite to form the
common hepatic duct
The point of attachment of the cystic duct to the gallbladder marks the ___ of the CBD.
proximal margin
Spiral valves of Heister are found where?
cystic duct
What is the purpose of the spiral valves of Heister?
prevent the cystic duct from collapsing or distending
What is choleycystokinin produced by?
duodenum
What is the opening that allows bile and pancreatic juices to flow into the duodenum?
sphincter of Oddi
liver –> biliary radicles –> right or left hepatic duct –> common hepatic duct –> cystic duct –> gallbladder –> common bile duct –> ampulla of vater –> sphincter of oddi –> duodenum
Bile flow
The CBD should not exceed ___ and is typically abnormal.
6mm
For patients older than 60 years who have had a cholecystectomy a max diameter of _____ may be normal.
10mm
When biliary tree obstruction or disease is suspected, look for an elevation in
ALP, ALT, serum bilirubin, GGT, urobilirubin (in additon to amylase and lipase)
Intrahepatic ducts are considered dilated if they exceed
2mm
A gallbladder sonogram should be performed after the patient has had nothing to eat for at least ________ hours.
Four to eight
What is the normal shape of the gallbladder in sagittal?
Anechoic, pear-shaped structure
What is the normal shape of the gallbladder in transverse?
Anechoic circle
What is typically the normal size of the gallbladder in length?
8 to 10cm
What is typically the normal size of the gallbladder in diameter?
4 to 5 cm
What is the proper position of the patient to check for gallbladder motility (most likely for gallstones and how stones move in the gallbladder)?
Supine, left lateral decubitus, prone, upright, and any position needed to demonstrate mobility
The gallbladder wall should measure no more than ___ mm.
3 mm
The enlargement of the common duct to the size of the adjacent portal vein within the porta hepatis is referred to as
double barrel “shotgun sign” or “parallel tube sign”
Coexisting dilation of the common duct and pancreatic duct is referred to as
“double-duct sign”
The CBD segment closest to the pancreatic head is considered
most distal segment of the biliary tree
Biliary dilation will occur where to the level of obstruction?
proximal
Most common level of obstruction to occur is
the distal CBD
Most common causes of CBD obstruction are
choledocholithiasis, chronic pancreatitis, acute pancreatitis,
pancreatic carcinoma
Obstruction within the bilary tree the patient will eventually suffer from
posthepatic (obstructive) jaundice
What is the yellow pigment found in bile?
bilirubin
Excessive bilirubin leads to elevated
serum bilirubin
What is infant jaundice usually caused by?
inability of the newborn liver to eliminate bilirubin from the bloodstream