GI Flashcards
duodenal & gastric ulcers: your first thought regarding causative agent is?
that damn H. Pylori
90% duo
75% gastric
Which 3 medications cause peptic ulcer disease?
NSAIDS
ASA
Glucocorticoids
duodenal vs gastric ulcers: what age ranges for each?
duodenal: youngies - 30-55
gastric: old farts - 55-65
Your patient has hella gnawing epigastric pain. How do tell what kind of peptic ulcer disease it is?
Ask ‘em if food makes it better or worse. If it’s a duodenal ulcer, it feels better after eating. If it’s a gastric ulcer, it feels worse after eating.
peptic ulcer disease: s/s x3
both: gnawing epigastric pain
duod: pain relief w food
gastric: pain worses w food
Expected physical findings associated with PUD?
PE unremarkable
GI BLEEDING (20%): melena, hematemesis, or coffee-ground emesis (duodenum)
PERF (5-10%): severe epigastric pain, quiet BS, rigid abd
Your patient is barfing up coffee ground looking shit and you suspect an ulcer. What is the location of the ulcer in this poor soul?
DUODENUM!
You think your patient has a perforated peptic ulcer because of what findings in your physical exam?
severe epigastric pain
RIGID/board-like acute abdomen
QUIET bowel sounds
What kinda drugs (class and names) you wanna prescribe first to a patient with PUD? When should the patients take them?
Go for them H2 Receptor Antagonists, like:
famotidine (Pepcid) 40 mg
ranitidine (Zantac) 300 mg
take qHS
What’s an important educational point for PPI?
take 30 minutes before meals
PPI black box warning?
↑ RISK HIP FRACTURE
Okay you’re gonna try PPI with your PUD patient. What are two options + their doses?
pantoprazole (Protonix) 40 mg
omeprazole (Prilosec) 20 mg
QD
NAME 4 MUCOSAL PROTECTIVE AGENTS
+ an administration consideration pertinent to all of them
sucralfate (Carafate)
bismuth subsalicylate (Pepto-Bismol)
misoprostol (Cytotec)
antacids
GIVE 2 HOURS APART FROM OTHER MEDS
What medication used to treat PUD is associated with decreases in nosocomial pneumonia? What IS it? **
sucralfate (Carafate) - it’s a mucosal protective agent
What mucosal protective agent used to treat PUD has antimicrobial action against H.Pylori?
bismuth subsalicylate (Pepto-Bismol)
Which medication is used prophylactically against NSAID-induced peptic ulcers?
misoprostol (Cytotec)
What medication should be prescribed for patients who cannot d/c NSAIDs in order to protect them from developing ulcers?
PPIs
What are the three combination therapy trios indicated for H. Pylori treatment?
metronidazole + omeprazole + amoxicillin
amoxicillin
metronidazole + omeprazole + clarithromycin
amoxicillin + omeprazole + clarithromycin
BID x 7 days
Which 3 kids of mucosal protective agents do not prevent NSAID-induced ulcers?
H2 receptor antagonists
carafate (Sucralfate)
antacids
H. Pylori develops quick resistance against which 2 meds? And slower resistance against what other 2 meds?
QUICK:
metronidazole (Flagyl) & clarithromycin (Biaxin)
NOT:
amoxicillin & tetracyclin
What is the anti-ulcer therapy recommended after H. Pylori therapy is complete?
3 - 7 weeks after completion of previous regimen:
- if duodenal ulcer: omeprazole 40mg QD or lansoprazole (Prevacid) 30 mg QD for 7 more weeks
- H2 blocker or sucralfate for 6 - 8 weeks
PUD: inpt mgmt x13
- IV access: IVF, blood, H2 blockers
- baseline labs: CBC, PT/PTT, BMP
- O2
- endoscopy, GI angiography
- urinary cath
- NPO/ng for lavage
- monitor abdomen: quiet, rigid, rebound tenderness
- if coagulopathy: FFP
- if thrombocytopenia: transfuse plts
- GI surgical eval
- upright or decub films: in 75%
What should you order if the cause of a GI bleed is unexplained?
GI angiography
Why is ng tube/gastric lavage not always necessary in GI bleeds?
80% of bleeds stop spontaneously
What is the preferred secretory agent to give to in-patients with GI bleeds?
H2 blocker - ex: famotidine (Pepcid)
42 yo. M presents to your clinic with complaints of epigastric pain that increased intensity over past two weeks. He describes the pain as decreasing after he eats. This finding mostly suggests what?
Duodenal ulcer
What is GERD?
backflow of acidic gastric contents into the esophagus
What are the two main causes of GERD?
Incompetent lower esophageal sphincter
Delayed gastric emptying
A 65 yo. M complains of dysphagia and epigastric pain. He reports hx of ETOH use and smoking for 25 years. What is the most likely diagnosis?
GERD
GERD: hallmark s/s
occurs at night +/- recumbent position
retrosternal burning
bitter taste in mouth
In the elderly what is a classic sign of GERD?
dysphagia
What diagnostic should you order for suspected GERD? What is the rationale for it?
esophagogastroduodenoscopy (EGD)
to r/o esophageal cancer, Barrett’s Esophagus, PUD, and more
GERD: mgmt x5
- antacids PRN
- H2 blockers: qHS or BID
- PPI if H2 ineffective
- GI/Surgical consult PRN
- non-pharm measures (elevate HOB, don’t eat stuff that exacerbates, stop smoking, weight reduction)
What is hepatitis?
inflammation of liver with resultant dysfunction
Describe Hep A.
A is for ANAL: fecal-oral route transmission
- enteral virus
- sources: contaminated food, water, intimate sexual contact
- mortality rate super low
When and for how long does a Hep A patient’s blood and stool remain infectious?
During the 2 - 6 week incubation period.
How is Hep B transmitted?
blood/blood products
sexual activity
mother to fetus
Describe Hep B.
Blood borne DNA virus found in serum, semen, saliva, secretions (vaginal)
Describe Hep C.
Blood borne RNA virus traditionally associated with blood transfusion and IVDU, but source of infection can be uncertain.
What is the mode of transmission of Hep C?
Blood
- transfusions
- IVDU
hepatitis: pre-icteric s/s
aversion to smoking, EtOH
fever, HA, n/v, fatigue, malaise, anorexia
hepatitis: icteric s/s
clay colored stool RUQ pain jaundice, pruritis dark urine weight loss sometimes: hepatosplenomegaly and low grade fever
any hepatitis: notable findings
WBC: low - normal
UA: protein, bilirubin
LFTs: ↑ ALT, AST (500 - 2000 IU/L)
What serology is diagnostic of acute Hep A?
Anti-HAV
IgM
peak during first week, disappear in 3 - 6 mo
What serology implies previous exposure, recovery, & immunity to Hep A?
Anti-HAV
IgG
What serology indicates active Hep B infection?
HBsAg (first evidence of infection, + in carriers and chronic)
HBeAg (= circulating virus in highly infectious sera)
Anti-HBc
IgM
What serology indicates recovery from Hep B?
Anti-HBsAg
Anti-HBc
True or False: There is a chronic form of Hep. A.
False. There is NO chronic form of Hep. A.
Hep A peaks at one week and disappears in 3-6 months
What is the first evidence of Hep B infection?
Hep B surface antigens - HBsAg
What indicates cirulating HBV and highly infectious serum?
HBeAg - envelope protein
What is the serology indicating active Hep C infection?
HCV RNA (acute) Anti-HCV (seen in acute or prior)
What diagnostic test detects presence of antibodies to hepatitis viruses?
Enzyme Immunoassay (ELISA)
What diagnostic test is used to distinguish prior exposure from current infection of Hep C?
Polymerase Chain Reaction (PCR)
HCV RNA means acute
hepatitis: mgmt
SUPPORTIVE! rest fluids 3 - 4L /day NO protein diet No ETOH, drugs
Vitamin K for prolonged PT (gt 15)
Lactulose 30 mL PO/PR if elevated ammonia (hepatic encephalopathy)