gall bladder lecture
TRANSCRIPT
Gallbladder Disease
By:Mohammad Mujib MunirzaiAmiri Medical Complex
Date:12/Nov/2016
Anatomy of Gallbladder• Location:
– between• Junction of the right ninth
costal cartilage• Lateral border of the rectus
abdominis .
• It is a pear shaped sac– lying on the inferior
surface of the liver – in a fossa between– Right and quadrate lobes– Capacity of about 30 to
50 mL.
Surface Anatomy• Direct contact
– superior part of the duodenum
– transverse colon.• Parts:
– Neck – Body– Fundus
Blood Supply of the Gall Bladder
• The cystic artery, supplying the gallbladder and cystic duct commonly arises from the right hepatic artery.
CYSTOHEPATIC TRIANGLE OF CALOT
Variations to the Cystic Artery
CONGENITAL ANOMALIES OF GALLBLADDER
Venous Drainage of the Gallbladder• The cystic veins,
– draining the neck of the gallbladder and cystic duct,
– enter the liver directly or drain through the portal vein to the liver,
– The veins from the fundus and body of the gallbladder pass directly into the visceral surface of the liver and drain into the hepatic sinusoids.
Lymphatic Drainage of Gallbladder
Nerve Supply• Celiac nerve plexus (sympathetic and
visceral afferent [pain] fibers)• The vagus nerve (parasympathetic)• The right phrenic nerve (actually somatic
afferent fibers).
Functions• Gall bladder
– It stores Bile– It concentrates bile– Ejects bile into lumen
• Bile– Emulsify dietary lipids– Formation of micelles with products of lipid digestion.
BILE• Bile is produced at a rate of 500–1500 mL/d by the hepatocytes
and the cells of the ducts• Composition of bile:
• Bilirubin (by-product of haem degradation)• Cholesterol (kept soluble by bile salts and lecithin)• Bile salts/acids (cholic acid/chenodeoxycholic acid):
mostly reabsorbed in terminal ileum(entero-hepatic circulation).
• Lecithin (increases solubility of cholesterol)• Inorganic salts (sodium bicarbonate to keep bile alkaline
to neutralise gastric acid in duodenum)• Water (makes up 97% of bile)
Secretion and enterohepatic circulation of bile salts
CHOLELITHIASIS• Presence of one or more calculi
(gallstones) in the gallbladder.
Types of gallstone• 20% are Cholesterol Stones.• 5% are Pigment Stones.• 75% are Mixed… … …
• In Asia 80% Pigment Stones.
• In Europe 80% Cholesterol Stones.
Pigment stone
Cholesterol Imbalance between bile salts/lecithin and cholesterol allows cholesterol to
precipitate out of solution and form stones Pigment
Occur due to excess of circulating bile pigment (e.g. Heamolytic anaemia) Mixed
Same pathophysiology as cholesterol stones
Other Factors Stasis (e.g. Pregnancy) Ileal dysfunction (prevents re-absorption of bile salts) Obesity and hypercholesterolaemia
Pathogenesis
Risk Factors• BIG 4..?
1. Female.2. Forty.3. Fertile.4. Fatty.
Risk Factors• Pregnancy.• OCP.• Hemolytic Anemia.• Cirrhosis.• Infection.• IBD/Terminal Ileal Resection.• TPN.• Hyperlipidemia.
Pathological Effects1. Silent Gallstones.2. Obstruction of the Cystic Duct.3. Movement of Stone into CBD.4. Ulceration of Stone through Gallbladder
Wall.
Cholelithiasis
Asymptomatic cholelithiasis
Symptomaticcholelithiasis
Chronic calculous
cholecystitis
Acute calculous
cholecystitis
Clinical Presentation1. Biliary Colic.2. Acute Cholecystitis.3. Chronic Cholecystitis.4. Gallstone Pancreatitis.5. Obstructive Jaundice.6. Acute Cholangitis.7. Gallstone Ileus.8. Mucocele / Empyema of the Gallbladder.
Definitions
• Biliary colic
– postprandial epigastric/RUQ pain due to transient
cystic duct obstruction by stone
– No fever, No leukocytosis, Normal LFT
• Differential Diagnosis:– Renal Colic.– Intestinal Obstruction.– Angina.
• Pain Episode may Resolve when Stone is Passed into CBD / Falls Back into the Gallbladder.
Gall bladder ultrasound• Shows
gallstones→
→
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