Gastroenterology Flashcards
Colonoscopy screening for ulcerative colitis
Every one to two years beginning 10 years after diagnosis for patients with disease extending beyond rectum
Irritable bowel syndrome workup with history of autoimmune disease
Check TTG rule out celiac disease - especially with type one diabetes and autoimmune thyroid disease
Acute fatty liver of pregnancy
Liver failure and coagulopathy
HELLP HEMOLYSIS, elevated liver enzymes, low plateletS
Microangiopathic hemolytic anemia
Resolved acute diverticulitis next step
After appropriate antibiotic therapy will require full colonoscopy to rule out other causes mimicking diverticulitis
Chest pain intermittent unrelated to exertion no reflux symptoms retrosternal pain seconds to minutes corkscrew on x-ray dysphasia to both liquids and solids
Diffuse esophageal spasm treat with calcium channel blockers/ppi - multiple simultaneous contractions on manometry
Many month history of dyspepsia looking like Gerd no alarm symptoms no physical exam abnormality what is treatment
Proton pump inhibitor
Hematochezia hypotension syncopal symptoms use of NSAIDs anemia what is next test to perform
Suspect upper G.I. source of bleeding needs upper endoscopy first - absence of blood or coffee ground material in NG tube does not rule out upper G.I. bleed - if negative then do colonoscopy
Treatment of new onset severely active Crohn’s disease
Antitumor necrosis factor therapy like infliximab is best and better than immunomodulators such as mesalamine because Crohn’s disease is transmural
Treatment of severe alcoholic hepatitis
Mandry discriminant function score of greater than 32 benefit from pentoxifylline if corticosteroids are contraindicated - like with kidney failure G.I. bleed active infections
How long to keep patient in hospital after high-risk peptic ulcer and a scopic treatment
72 hours - takes this long for high-risk peptic ulcer to become peptic ulcer
Patient with G.I. bleed due to angioectasias and aortic stenosis
replace aortic valve - heyde syndrome e - mechanical destruction of von Willebrand multimers during non-laminar flow through narrow aortic valve
Young patient history of several food impaction’s history of allergies and asthma egd with concentric rings
Eosinophilic esophagitis treat with PPI or budesonide
Food regurgitation barium swallow dilated esophagus tapering gastroesophageal junction manometry decreased peristalsis increased lower esophageal pressure
Achalasia then do a EGD to rule out lymphoma cancer then a surgical myotomy
Regurgitating food eaten several days ago with halitosis
Zenkers diverticulum pouch in hypopharynx
odynophasia for more than 10 days
Egd to rule out esophagitis consider pill induced, radiation, infections like Candida CMV herpes
HIV patient with oral thrush complaining of odynophasia
No need for EGD right away treat empirically then if no improvement EGD to rule out CMV and herpes
Progressive dysphasia two solids heartburn several years
Peptic stricture
Patient with CVA hemiparesis with coughing and choking sensation was regurgitation of fluids to knows best diagnostic test
Video fluoroscopic swallowing study or modified barium swallow
Heartburn not remove by antacid initial diagnostic step is
Ppi challenge - step down to H2 if better in 3 months
If patient doesn’t get better with PPI
EGD - if no esophagitis then ambulatory pH monitoring if little reflux than likely psychiatric give citalopram
Heartburn not respond – since with weight loss
Directly to EGD
Treatment of GERD with PPI’s or fundoplication surgery effect on existing Barrett’s
No effect
Barrett’s esophagus EGD guidelines
After diagnosis the EGD one year later
NO Dysplasia ON REPEAT EGD NEXT ONE THREE-YEARs
Low-grade dysplasia repeat Egdsix months if still low-grade repeat yearly
If changes back to metaplasia continually EGD every three years
HIGH-GRADE DYSPLASIA ENDOSCOPIC HIGH FREQUENCY ABLATION
Severe retrosternal chest pain worse with swallowing and breathing - chest x-ray with left plural effusion subcutaneous emphysema
Esophageal rupture diagnosed with Gastrografin study
Best H. pylori test if taking PPI
Antibody ie serology test - only for diagnosis
Best H pylori test if not taking PPI
Fecal antigen test used for diagnosis and follow up
Urease breath test for H. pylori
Diagnosis and follow up
H pylori treatment failure with triple therapy
Quadruple therapy tetracycline Flagyl bismuth ppi
NSAID induced PUD
Gastric ulcers higher with old age higher dose steroids with NSAIDs give worse risk bleeding
ZE syndrome
Duodenal bulb, Gastrinoma’s, present with PUD or diarrhea steatorrhea - inactivated pancreatic lipase
Diagnosis IV secretin increase gastric greater than 1000
CT scan or somatostatin receptor scan localized tumor
PPI and resection of Tumor
MEN1
G.I. bleeding monitor period
72 hours
Ppi related issues
C diff colitis, hospital acquired pneumonia, osteoporosis, hypomagnesemia, microscopic colitis
Esophageal varices
Not selective beta blockers such as propranolol carvedilol nadolol - if asthma then band ligation
Patient with cirrhosis and variceal bleed and spider angiomata
Nonselective beta blocker and antibiotics
Gastric malignancies
Adenocarcinoma 80% caused by h pylori
MALToma
Treat for H. pylori will regress
Post gastrectomy abdominal bloating postprandial symptoms relieved by vomiting
Afferent loop syndrome
Post gastrectomy fat and vitamin B12 malabsorption
Blinds loop syndrome bacterial overgrowth the conjugation of bike salts
Prognostic factor in acute pancreatitis
BUN - despite temperature elevated lactate white count no antibiotics
Congenital failure to fuse pancreatic ducts resulting in frequent pancreatitis
Pancreas divisum
Way to feed severe acute pancreatitis
Enterojejunal tube
Pancreatitis with muscle spasm in weakness
Hypocalcemia
18 Year old pancreatitis of unknown etiology
Sweat chloride test rule out cystic fibrosis - can be associated with pancreatitis
Lab values suggesting biliary ideology of pancreatitis
ALT greater than two times normal then increased alk phos
Severe pancreatitis elevated AST and LFT dilated common bile duct next
ERCP, remove stone, eventual cholecystectomy
Mild pancreatitis ultrasound gallstones no CBD dilation
Elective cholecystectomy
Post cholecystectomy patient with nausea vomiting pain chills with elevated bilirubin liver enzyme tests amylase
Retain common bile duct stone
Post hip replacements pain fever elevated liver enzymes elevated amylase ultrasound but thinking gallbladder wall
Acalculus cholecystitis requires cholecystectomy
Complications of pancreatitis
- fluid collections pleural effusion’s two days
- Pancreatic necrosis less than two weeks
- Pseudocyst wonder four weeks can hemorrhage rupture fistula
- Abscess 4-6 weeks soap bubble sign Gram stain
- Splenic vein thrombosis can occur anytime digastric CT abd
Ulcerative colitis
Rectal ulcer spreads proximately erythema friable mucosa very superficial ulcer crypto just toxic like a cool with erythema nodosum Rh negative arthritis pyoderma gangrenosum ankylosing spondylitis sclerosing cholangitis associated with cancer colonoscopy every after 8 years then q1-3
Crohn’s disease
Rectal sparing perirectal fistulas anyone G.I. tract mainly in the terminal ileum skip lesions
Diarrhea deep ulcers with granulomas toxic Megacolon
String sign
Best treatment for stricture
Surgery
Ulcerative colitis with extraintestinal symptoms pain in joints of hands with early morning stiffness
Rheum neg arthritis - sulfasalazine
Diarrhea right lower quadrant mass temperature ulcer in mouth
Crohn’s disease
Bloody diarrhea last 2 years, wks ago went to mexco, colonoscopy with erythematous friable mucosa
UC
Pt h/o UC with diarrhea/leukocytosis
r/o c diff
Young woman with chronic diarrhea wakes up at night for bathroom
Inflamm bowel dz
UC in remission - p/w LFTs bili, US shows focal dilations
ERCP/MRCP dx primary sclerosing cholangitis (beaded appearance) - brush bx prodominant stricture, need annual US gallbladder for polyps - if pos - cholecystectomy - if enzymes worsen then refer for liver tx
UC/Crohns maintenance medication
5ASA (Mesalamine +- flagyl, antiTNF alpha - DO NOT USE STEROIDS
Young man UC p/w abd pain, distension of colon to 7cm not improving with thumb printing on xray
subtotal colectomy
Pt with proctocolectomy and ileal anal anastamosis pouch p/w diarrhea with blood, temp -> endoscopy with diffuse superficial ulceration in pouch
Pouchitis -> tx with flagyl
Pt with Crohns rectovaginal fistula not responding to 6MP and flagyl
anti-TNF alpha (infliximab) - watch out for TB reactiv, PNA, crypto, histo
24 yo UC 4 years with jaundic and fever, hepatomegaly, elev bili, elev alk phos, AST, ALT p-ANCA +
Primary Sclerosing Cholangitis - beading/focal dilation biliary tree - P-ANCA +, a/w UC - if LFT/bili worsens - refer for liver tx
Review Chart GI page 453
Green book - GI
20 yo rectal bleed tenesmus - anal fissue - 6x6cm ulcer on leg
r/o UC with sigmoidoscopy/anoscopy - tx with 5asa suppostory
External hemorrhoid
topical NTG
Stool osmotic gap equation
290-2(stool Na+K)
Secretory diarrhea
> 1L/day, doesn’t stop with fasting, stool osm=290, osm gap <50
Osmotic diarrhea
50
longstanding diarrhea x years, stool osm 290, stool Na=50, K=25
lactose intolerance (stool gap >50)
diarrhea while vacation mexico - no blood, no fever
entertoxogenic e coli - tx with loperamide +- azithro x 3 days
Diarrhea +-fever +-blood with abd pain 2 days after undercooked poultry, mountain stream water, contact with dogs/cats - +fecal WBCs
C.Jejunum (can cause Guillion barre)
Diarrhea with abd cramping +- fever - had chicken, raw eggs or ice cream
salmonella
bloody diarrhea - hamburgers at fair 36hrs ago or unpasteurized mild - dec platelets
O157:H7 E.Coli - Mcorrey sorbitol agar - SX treatment only DO NOT GIVE ABX - will cause HUS - if RF then HD (TTP)
Bloody diarrhea
Shigella, C.jejuni, salmonella, c.diff
Diarrhea after camping, skiing with bloating, flatus, frothy stool
Giardiasis - check elisa for Giardia ag -> flagyl - post tx elisa should be negative
Canned Precooked foods beef/turkey - 12 hrs later diarrhea/vomitting no blood
C.perfringen - supportive tx
Diarrhea 4 hours after asian restaurant - fried rice - vomiting no blood
Bacilius cereus - supportive tx
Diarrhea after sea food dinner - g neg comma shaped bug
vibrio parhemolyticus -> cipro
Diarrhea, nausea vomiting, abd pain after eating fish (2hrs) with perioral paresthesias - reversal hot/cold sensation
ciguatera toxin from large reef fish (fish that eat other fish)
Flushing, utricaria, paresthesias minutes after eating fish
scromboid - histamine in fish
eats fish and minutes later parestehesias, weakness, ascendign paralysis and SOB
tetrodotoxin from puffer fish
Chronic diarrhea, hx travel to mexico last year - or presentation with acute dysntery - colonscopy with flask shaped ulcers
amoebic colitis
RUQ pain, fever, elev wbc after third world country - bloody diarrhea inc LFTs
amobic liver cyst - check stool for ova/cyts - elisa - if CT abd + then aspirate and tx with flagyl
HIV CD4<200 chronic diarrhea/wt loss no fever no blood
cryptosporidium - stool afb small round organisms - if stable just hydration, if not imporoving nitazoxanide
woman chronic diarrhea years, frequent small stools with mucous and constipation pain relieved with BM, no night waking no fever, wt loss anemia, stool studies neg, emotional stress - flex sig neg
irritable bowel syndrome (rome III criteria) - reassurance - rifaxinin, antispasmotics, anticholinergics - TCA, fiber
chronic diarrhea stool osm 300, stool Na 40, K 30 on adding naOH turns red
laxative abuse - stool gap 160 (>50)
diarrhea, RLQ pain, fever, rash fecal WBC no h/o diarrhea
yersinia enterocolitica
diarrhea WBC 12K Cdiff +
flagyl PO
recurred (x1) cdiff + diarrhea WBC 13
restart flagyl (leftover cdiff spores now matured)
recurred (x2) cdiff
vanco PO pulse therapy - 125mg 4x daily x 7 days, then taper
diarrhea, cdiff + WBC 18
po vanc (>15k don’t use flagyl)
which abx induced B1/NAP1 cdiff which causes toxic megacolon
cephalosporin or quinalones
77yo M a/w PONA started on abx - what do prevent cdiff
probiotics (lactobacillus)
74yo known diabetic p/w diarrhea with c.diff WBC 12 better with flagyl returns with WBC 24 with hypotension, fever, tachycardia ele lacatate
po vanc, recta vanc, iv flagyl and surgery c/s
prevent spread of cdiff
wash hands with soap and water (no etoh sanitizer)
65yo M fatigue, chronic diarrhea, itching with pallor, bullous skin lesions, Hg low, MCV low, TIBC inc, ferritin low, occult neg - blood smear howel jowell body, colonscopy neg for bleed - no change with iron therapy
TTG ab r/o celiac sprue
If celiac sprue neg tx?
gluten free diet - can have dermatitis herpetiformis
Dermatitis herpetiformis tx
gluten free diet and dapsone
asx brother of pt with celiac sprue - what to check
HLA DQ2 or 8 (not TTG)
vitamin supplement needed in celiac sprue
Vit D