Bella Shared "Gastroenterology" - 213 Picmonics
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Gastroenterology
Annular Pancreas
- Characteristics
- Congenital Anomaly
- Fusion of Ventral and Dorsal Pancreatic Buds
- Circumferential Duodenal Compression
- Associations
- Down Syndrome
- Clinical Features
- Polyhydramnios
- Poor Feeding
- Vomiting
- Diagnosis
- Double Bubble Sign
- Management
- Surgery
2 mins
Omphalocele
- Characteristics
- Herniation of Abdominal Organs via Umbilicus
- Covered by Peritoneum
- Defect of Lateral Fold Closure
- Associations
- Trisomy Syndromes
- Beckwith-Wiedemann Syndrome
- Diagnosis
- Increased AFP
- Management
- Surgery
2 mins
Gastroschisis
- Characteristics
- Herniation of Abdominal Organs via Abdominal Wall
- Not Covered by Peritoneum
- Right Side of Umbilicus
- Associations
- Prematurity
- Diagnosis
- Increased AFP
- Management
- Surgery
- Complications
- Necrotizing Enterocolitis
- Short Bowel Syndrome
2 mins
Portosystemic Anastomoses
- Characteristics
- Portal Hypertension
- Anastomoses
- Left Gastric Vein - Esophageal Veins
- Esophageal Varices
- Paraumbilical Veins - Epigastric Veins
- Caput Medusae
- Superior Rectal Vein - Middle & Inferior Rectal Veins
- Anorectal Varices
2 mins
Cholecystokinin (CCK)
- Secreted by I Cells
- Duodenum and Jejunum
- Physiology
- Increase Pancreatic Secretions
- Increase Gallbladder Contraction
- Induce Relaxation of Sphincter of Oddi
- Decrease Gastric Emptying
- Regulation
- Increased by Fatty Acids and Amino Acids
1 min
Somatostatin
- Secreted by D Cells
- Pancreas
- GI Tract
- Action
- Decrease Secretion of Gastric Acid and Pepsinogen
- Decrease Pancreatic and Small Intestine Fluid Secretion
- Decrease Gallbladder Contraction
- Decrease Glucagon and Insulin Secretion
- Regulation
- Secretion is Increased by Acid
- Secretion is Decreased by Vagal Stimulation
- Clinical Use
- Octreotide
- Carcinoid Syndrome
- Variceal Bleeds
2 mins
Bile
- Synthesis and Circulation
- Synthesized Continuously By Hepatocytes
- Cholesterol 7 Alpha-Hydroxylase Rate Limiting Step
- Stored In Gallbladder
- Secreted Into Duodenum
- Bile Salts Reabsorbed In Terminal Ileum
- Returned To Liver Via Portal Circulation
- Composition
- Bilirubin
- Bile Salts
- Cholesterol And Phospholipids
- Ions And Water
4 mins
Secretin
- Synthesis
- Secreted from S Cells in Duodenum
- Regulation
- Stimulated by Fatty Acids in Duodenum
- Functions
- Increases Bicarbonate Secretion
- Increases Bile Acid Secretion
- Decreases Gastric Acid
2 mins
GI Absorption
- Stomach
- Alcohol
- Duodenum
- Iron
- Jejunum
- Folate
- Terminal Ileum
- Vitamin B12
- Bile Resorption
1 min
Oral Cavity
- Characteristics
- Mouth
- Mechanical Digestion
- Salivary Amylase Begins Carbohydrate Breakdown
- Lingual Lipase Begins Lipid Breakdown
- Esophagus
- Bolus
- Peristalsis
1 min
Stomach Digestion
- Characteristics
- Chief Cells Secrete Pepsinogen
- Pepsinogen Turned to Pepsin By H+
- Protein Breakdown Begins
- Mucous Cells Secrete Mucus and Bicarbonate
- G Cells Secrete Gastrin
- Gastrin Stimulates Parietal Cell HCl Release
- Parietal Cells Secrete Intrinsic Factor
2 mins
Small Intestine Digestion
- Brush border enzymes
- Pancreatic Enzymes are secreted via a Duct
- Pancreas secretes bicarbonate
- Brush Border activates Pancreatic Trypsin
- Trypsin activates Chymotrypsin
- Trypsin and Chymotrypsin digest Proteins
- Gallbladder Releases Bile
- Pancreatic Lipase breaks down Lipids
- Goblet cells secrete mucus
- Pancreatic Amylase breaks down Carbohydrates
- Pancreatic Nucleases breakdown DNA/RNA
- Digestion occurs in the Duodenum
2 mins
Small Intestine Absorption
- Characteristics
- Carbohydrates Undergo Active Transport
- Amino Acids Undergo Active Transport
- Small Lipids Undergo Passive Diffusion
- Epithelial Cells
- Intestinal Capillaries
- Hepatic Portal Transports Nutrients
- Liver
- Large Lipids Transported as Chylomicrons
- Lacteals Transport Chylomicrons
2 mins
Liver Enzyme Tests: AST and ALT
- AST/ALT Ratio
- AST: 8-20 U/L
- ALT: 8-20 U/L
1 min
Bilirubin Metabolism Overview
- Blood
- Unconjugated Bilirubin
- Bound to Albumin
- Heme
- Red Blood Cells
- Macrophages
- Liver
- Conjugated Bilirubin
- Secreted into Bile
- Bowel
- Urobilinogen
- Eliminated in Feces
- Eliminated in Urine
- Enterohepatic Circulation
3 mins
Esophageal Varices
- Pathophysiology
- Cirrhosis
- Portal Hypertension
- Left Gastric Vein and Esophageal Veins
- Clinical Features
- Hematemesis
- Melena
- Hypotension
- Acute Management
- IV Fluids
- Antibiotics
- Octreotide
- Endoscopic Band Ligation or Sclerotherapy
- Balloon Tamponade
- Prophylaxis
- Nonselective Beta Blockers
- Transjugular Intrahepatic Portosystemic Shunt (TIPS)
3 mins
Tracheoesophageal Fistula (TEF)
- Cause
- Esophageal Atresia
- Ends in Blind Pouch
- Assessment
- Coughing
- Choking
- Cyanosis
- Drooling
- Considerations
- NPO
- Surgical Emergency
- Aspiration Pneumonia
2 mins
Achalasia
- Pathophysiology
- Failure to Relax Lower Esophageal Sphincter
- Malignancies
- Chagas Disease
- Loss of Auerbach Plexus
- Symptoms
- Dysphagia to Solids & Liquids
- Diagnosis
- Barium Swallow
- Bird's Beak Appearance
- Manometry
- Risk Factors
- Increased Risk Squamous Cell Carcinoma
2 mins
Mallory-Weiss
- Characteristics
- Bleeding From Tears in Mucosa
- Forceful Vomiting
- Alcoholism
- Eating Disorders (Bulimia)
- Painful Hematemesis
- Diagnosis
- Endoscopy
- Management
- Observation
2 mins
Boerhaave Syndrome
- Pathophysiology
- Esophageal Rupture
- Increased Esophageal Pressure while Vomiting
- Lower 1/3 of Esophagus
- Signs and Symptoms
- Chest Pain
- Odynophagia
- Subcutaneous Emphysema
- Management
- Shock
- Surgical Emergency
2 mins
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