GB Flashcards
The 4/5-week embryo develops a bud from the foregut that grows _____ (direction); the cranial portion becomes the _____ and the _____.
Cephalad
Liver
Hepatic bile ducts
In the _____ portion of the growing bud, a second bud develops, also called the _____, and this becomes the gall bladder and cystic duct.
caudal
diverticulum
This is a rare condition that results from the failure of the cystic bud to develop in the 4th week of intrauterine life.
agenesis of the GB
This condition often occurs with duplication of the cystic duct and may be diagnosed prenatally.
duplication of the GB
The GB’s main function is to
store bile
T or F? When stored in the GB, bile becomes less concentrated and therefore more powerful in its ability to do its work.
Why?
False
MORE concentrated = MORE powerful
This organ is often also removed automatically with gastric bypass surgery.
GB
What hormone is released with the ingestion of food (especially fats), that signals the relaxtion of the valve at the end of the CBD (the sphincter of _____) which lets the bile enter the small intestine.
cholecystokinin
Oddi
What does the release of cholecystokinin signal (2)
the relaxation of the sphincter of Oddi
the contraction of the GB
When the GB contracts, what happens?
It squirts the concentrated bile into the small intestine where it helps with the emulsification or breakdown of fats in the meal.
This is a muscular valve that controls the flow of digestive juices (bile and pancreatic juice) through the Ampulla of Vater into the second part of the duodenum.
Sphincter of Oddi
This is relaxed by the release of cholecystokinin (CCK).
Sphincter of Oddi
What 2 vessels merge at the Ampula of Vater?
CBD and Pancreatic Duct
This consists of cholesterol, lecithin, calcium, bile salts, acids and waste materials among other things.
Bile
What happens within bile that is a cause of gallstones?
the bile salts and cholesterol become umbalanced
T or F? Bile is continually being made and secreted by the liver in varying amounts into bile ducts.
true
Some of the bile that is made and secreted go directly into the _____ and some into the _____.
small intestines
GB
This also acts as a reservoir that uptakes excess bile when there is pressure in the bile ducts.
GB
The 2 major functions of bile are
1) emulsifies fats so that the body can use them
2) acts as an antioxident to help remove toxins from the liver
The GB lies in the _____ margin of the liver, between the RLL and LLL.
inferior
This vessel may be used to help find the GB fossa, which is in the same anatomic plane.
MHV
Most hepatic ultrasounds will see and use this as a landmark for the GB fossa.
MLF
The GB derives its blood supply from the _____.
cystic artery
The cystic artery arrises from the _____ and supplies the GB with blood.
RHA
T or F? You can’t see the cystic artery or cystic vein on U/S.
True
Sometimes the proper hepatic artery skips the RHA and connects directly to the _____.
cystic artery
The GB is divided into _____ (#) parts, which are
3
neck
body
fundus
The GB neck terminates in the _____.
narrow infundibulum
This area of the GB is a common location for impaction of gallstones.
infundibulum (Hartmann’s Pouch)
This is a region of the GB neck that may be angulated in some people.
infundibulum
Hartmann’s Pouch
Failure to identify the GB on an exam is most often due to
a previous cholecystectomy
Occasionally it is hard to find the GB in an exam because of this condition, which leads to a collapsed and fibrosed GB.
chronic cholecystitis
The GB may lie in _____ positions and be difficult to locate.
ectopic
The GB may fold onto itself, the body onto the _____ or the _____ onto the body.
neck
fundus
When the GB fundus folds onto the body, this is known as a _____ and has no clicial significance.
phrygian cap
This is a GB composed of 2 or more intercommunicating compartments divided by a THIN septa.
Septate GB
This is an GB composed of 2 or more intercommunicating compartments divided by a THICK septa.
Hourglass GB
The GB is located at the _____ end of the MLF in the area we call the GB _____.
inferior
fossa
The _____ (vessels) converge to form the RHD and LHD.
intrahepatic bile ducts
The _____ (vessels) converge to form the CHD.
RHD and LHD
The GB neck tapers to form the _____ which joins with the CHD to form the CBD.
cystic duct
The _____ and _____ join to form the Ampulla of Vater.
CBD
Main Pancreatic Duct
Within the cystic duct and sometimes the GB neck, small mucosal folds exist called
Spiral Valves of Heister
T or F? Sometimes you will see the Spiral Valves of Heister on U/S.
True
The Spiral Valves of Heister control the bile flow in the _____ (vessel).
cystic duct
Spiral Valves of Heister are problematic at times because _____ can get stuck in them.
gallstones
The GB appears as a _____ (echogenicity) oblong structure _____ (relationship/location) to the right kidney, _____ (relationship/location) to the head of the pancreas and duodenum, indenting the _____ to medial aspect of the RLL.
sonolucent
anterior
lateral
inferior
The GB size should be less than _____ transversely and less than _____ sagitally.
4cm
10cm
The wall thickness of the GB should be less than _____ and measured at the _____ portion.
3mm
fundus
The GB is located in the _____ (quadrant), between the _____ and _____.
RUQ
RLL
LLL
The bright linear reflector within the liver that connects the GB and the RPV or MPV is the
MLF
T or F? A prominent GB may be normal in some people because of their fasting state.
True
If the GB appears too large, administration of a _____ _____ and further evaluation may differentiate between normal and abnormal. If contraction does not occur, the _____ area should be studied for suspicious masses.
fatty meal
pancreatic
The contracted GB wall appears thick and may obscure _____ or _____ abnormalities.
luminal
wall
The exam of a GB should be performed after a minimum of _____ hours of fasting.
6
A well contracted GB changes in the following ways (3):
1) strong, reflective outer contour
2) poorly reflective inner contour
3) sonolucent area between both reflecting structures
T or F? A GB ultrasound MUST be performed in at least 2 different patient positions.
True
If the GB is not visualized, what should be done?
Maneuvers to evaluate the GB fossa are essential to avoid missing GB pathology
The rule of thumb for measuring the GB is to compare it to the _____ in the _____ plane. The width of the GB should always less than _____.
right kidney
transverse
5cm