GI Exam Flashcards
Niacin (B3) deficiency tx
Nicotinamide
What is the MC site of Gi lymphoma
Stomach
Which type of peptic ulcer is more common
Duodenal
Enzymes of the stomach
HCl and pepsin
Function of HCl
Dissolve food, activate pepsin, stimulate duo to release digestive enzymes, kill harmful bacteria
Function of pepsin
Digest proteins into small absorbable peptides
What do chief cells secrete?
Pepsinogen
Gastrin function
Stimulation of stomach acid secretion and motility
What does large intestine do?
Reabsorbs water
What does the duodenum release?
Secretin and CCk
3 Pancreatic digestive enzymes
Trypsin, amylase, lipase
EGD
Upper endoscopy
Pyrosis
Heartburn
What is the difference between a rolling and a sliding hiatal hernia?
Sliding = stomach and GE slide back and forth through the diaphragm
Rolling = GE stays in place and the stomach protrudes through hiatus next to the esophagus
What is the MC cause of an upper GI bleed?
PUD
What in combo with NSAIDs can lead to peptic ulcer?
Steroids
What methods are used in EGD tx of peptic ulcers?
Small = endoclips Large = cautery
Most effective medical management of PUD
PPIs
What do H2 blockers block?
Histamine (stimulus for acid secretion)
Suffix for PUD drugs
- azoles
- tidines
Dx testing for H. Pylori
Endoscopy w/ gastric bx
Urea breath test (also tests for eradication)
H. pylori stool antigen (also tests for eradication)
Tx for H. Pylori
2 abx - amox + clarithro
PPI (must hold for 2 weeks prior to testing for eradication - can cause false negative)
Best dx for Zollinger-Ellison syndrome
Fasting gastrin level (b/c ZE = hypersecretory acid state)
What type of gastritis does H pylori cause
Non-erosive
Causes of erosive gastritis
Meds, alcohol, stress, ischemia
Bezoar
Undigested food in the stomach
How quickly does food leave the stomach
Approx 4 hrs
What causes the diarrheal form of b. Cereus
Powdered Milk, rice, macaroni
When do you use abx for ETEC?
If severe illness or lasting > 24hrs
Dysentary
Infectious diarrhea —> bloody, mucousy stool
What is the mainstay of treatment for infectious diarrhea
Hydration
What is the dx test for typhoid?
Blood culture
What is the tx for typhoid?
Fluids
Fluoroquinolone if severe
Stool cultures are only good for which types of GI infection?
Bacterial
What is the stigmata of liver dz
Firm liver (L or S)
Fever is MC with which form of cholestasis (acute or chronic)
Acute
Dark urine, pale stools and steatorrhea are present in _________ and not __________
Cholestasis and not hepatitis
What elevates with obstruction of bile leaving liver?
AlkP
What lab is decr in pts with chronic liver dz?
Albumin
What is physiologic jaundice
Neonates get it b/c they have immature enzymes (UGT0
Tx for physiologic jaundice
UV light
Other than hemolysis what can cause incr in UCB?
Decr albumin binding to bili
Type of bilirubin incr in prehepatic jaundice
Unconj
Type of bilirubin incr in hepatic jaundice
Both incr
Type of bilirubin incr in posthepatic jaundice (obstructive)
Conj at onset, then both incr
Gilbert Dz
Decr UDPG causing incr UCB
Crigler-Najaar
High UCB in infants d/t no UGT activity - can cross BBB and cause kernicterus (permanent brain injury)
Dark urine and light colored stools are associated with which type of bilirubin?
Conjugated bilirubin
Elevated liver enzymes signify damage to what?
Liver cells
Elevated AlkP indicates injury to what?
Biliary tree
What is MRCP?
Bile duct imaging
What do the FIB4, APRI, and fibrosure tests indicate?
Cirrhosis
What will imaging show if problem is obstruction?
Biliary tree dilation
What is elevated on labs in primary biliary cirrhosis?
AlkP