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GI system: Upper/lower GI, liver, GB, pancreas
Foregut Structures, Blood Supply and Innervation
Structures
Esophagus
Lower Respiratory Tract
Stomach
Proximal Duodenum
Liver
Gallbladder
Pancreas
Spleen
Vascular Supply
Celiac Artery
Innervation
Vagus Nerve
2 mins
Midgut Structures, Blood Supply and Innervation
Structures
Distal Duodenum
Jejunum
Ileum
Appendix
Ascending Colon
Proximal 2/3 of Transverse Colon
Vascular Supply
Superior Mesenteric Artery
Innervation
Vagus Nerve
Lesser Splanchnic Nerve
2 mins
Hindgut Structures, Blood Supply and Innervation
Structures
Distal 1/3 of Transverse Colon
Descending Colon
Sigmoid Colon
Rectum
Pectinate (Dentate) Line
Urogenital Sinus
Vascular Supply
Inferior Mesenteric Artery
Innervation
Lumbar Splanchnic Nerves
Pelvic Splanchnic Nerves
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
Esophageal Adenocarcinoma Characteristics and Presentation
Characteristics
Most Common Esophageal Cancer in USA
Lower 1/3 of Esophagus
Risk Factors
Gastroesophageal Reflux Disease (GERD)
Barrett's Esophagus
Achalasia
Obesity
Smoking
Presentation
Weight Loss
Progressive Dysphagia
Anemia
2 mins
Gastroesophageal Reflux Disease (GERD) Assessment
Pathophysiology
Relaxed Lower Esophageal Sphincter
Signs and Symptoms
Dyspepsia (Indigestion)
Belching
Nighttime Coughing
Dysphagia
Epigastric Pain
Regurgitation
Heartburn (Pyrosis)
Globus
2 mins
Barrett's Esophagus
Histological findings
Metaplasia in Lower Esophagus
Columnar Epithelium
Associated Pathologies
Gastroesophageal Reflux Disease (GERD)
Esophagitis
Esophageal Ulcers
Increased Risk of Esophageal Adenocarcinoma
1 min
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
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
Zenker Diverticulum
Pathophysiology
False Diverticulum
Junction of Pharynx and Esophagus
Inferior Pharyngeal Constrictor
Symptoms
Dysphagia
Regurgitation of Undigested Food
Halitosis
Diagnosis
Barium Swallow
Treatment
Surgical Repair
2 mins
Plummer-Vinson Syndrome
Triad of Symptoms
Dysphagia
Esophageal Webs
Glossitis
Iron Deficiency Anemia
Association
Squamous Cell Cancer of Esophagus
1 min
Esophageal Perforation
Etiologies
Iatrogenic
Inflammation
Trauma
Boerhaave Syndrome
Presentation
Retrosternal Pain
Subcutaneous Emphysema
Pneumomediastinum
Diagnostic Workup
Chest X-Ray
Esophagram
Computed Tomography
Management
ABCs (Airway, Breathing, Circulation)
Broad-Spectrum Antibiotics
Surgical Repair
4 mins
Esophageal Squamous Cell Carcinoma Risk Factors and Presentation
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