Gastrointestinal Flashcards
Study to order if pt presenting with dysphagia/regurg for solids AND liquids
Probably a motility disorder
Get barium swallow
Want to see how throat looks when pt swallows, aka the peristalsis function & motility
Study to order if pt is presenting with dysphagia - initially to solid foods only but now cannot tolerate liquids or soft foods either?
Order an EGD - you want to look at the tissues!
Think if a tumor was growing…initially huge chunks of stead would cause a problem but then as the tumor grew larger & obstructed more you’d have problems with soft foods & liquid too!
Study to order when identifying a motility disorder of the esophagus?
List motility disorders of the esophagus
Order a barium swallow - want to see the peristalsis (AKA MOTILITY) of the esophagus!
Achalasia (inc LES pressure 2/2 idiopathic loss of nerves)
Nutcracker esophagus (excessive pressure during peristalsis - manometry = inc pressure during peri)
Diffuse esopageal spasm - esophagram shows CORKSCREW - stabbing chest pain worse w/ hot or cold liquids/food
Gold standard dx achalasia
Manometry
Increased LES pressure > 40 mmHg
EGD of nutcracker will show?
NORMAL
Get manometry for dx - will show inc pressure during peristalsis
Barium swallow (esophagram) nutcracker esophagus?
NORMAL
Get manometry for dx - will show inc pressure during peristalsis
Initial study to order for dysphagia to solids
EGD
If looking for tissue abnl - ring/web, cancer (dysphagia for solids only) –> EGD
Initial study to order for dysphagia to both solids and liquids (at onset)
Barium swallow esophagram
If dysphagia to solids and liquids from onset then probably a motility disorder
For identifying abnormal motility disorder - make the SWALLOW - aka barrium swallow
Clinical presentation & Dx diffuse lower esophageal spasm
CP: Stabbing chest pain, worse w/ hot or cold liquids/foods
Dx: Barium esophagram - CORKSCREW
Drugs that lower the esophageal pressure
(and therefore used to treat disease - achalasia, nutcracker, diffuse esophageal spasm - 2/2 increased esophageal pressure)
CCB
Nitrates
Botox injections
Sildenafil
Diagnosis of nutcracker esophagus
Manometry - increased pressure during peristalsis
EGD and barium swallow will be NORMAL (will probs have already ordered at least a barium swallow to see why person is having difficulty swallowing liquids and solids)
Who gets eosinophilic esophagitis?
MC IN KIDS
ATOPIC PT (allergies, asthma, etc…lots of IgE!)
Dx of eosinophilic esophagitis
Dx:
EGD - can be normal
+/- multiple corrugated rings on the esopagus
+/- white exucates
Tx:
Remove foods that incite allergic response, inhaled ICS WITHOUT spacer - want to go to throat not lungs
MCC pill-induced esophagitis
Bisphosphonates
KCl
Iron pills
Bb, CCB
Hallmark of infectious esophagitis
ODYNOPHAGIA = PAIN
CMV = large superficial shallow ulcers - GANCYCLOVIR HSV = small deep ulcers - ACYCLOVIR Candida = linear yellow-white plaques - FLUCONAZOLE
What is the diagnostic test of choice for a evaluating a person with acute chron’s disease?
UGI series with small bowel follow thru
What is plummer-vinson syndrome?
It is the triad of:
- dysphagia
- esophageal webs
- iron-deficiency anemia
MC in Caucasian women 30-60
Can also have atrophic glossitis, angular cheilitis
What is an esophageal web?
Thin membranes in the mid-upper esophagus - may be congenital or acquired
What is a schatzki ring? What are they associated with?
It is a LOWER esophageal web/constriction at the squamocolumnar junction
MC a/w sliding hiatal hernias, but may be a complication of corrosive esophageal injury (chronic GERD = stricture)
CP Schatzki ring, esophageal web?
Dysphagia to SOLIDS (mainly) - liquid can get by the ring for the most part
Dx Schatzki ring, esophageal web?
Tx?
Barium esophogram (swallow) = diagnostic test of choice
Tx: Endoscopic dilation of the area if symptomatic without reflux
CP Boerhaave syndrome? Definitive diagnostic study?
Boerhaave = FULL THICKNESS rupture of DISTAL esophagus
CP: Retrosternal chest pain worse with deep breathing & swallowing, hematemesis
PE: Crepitus on chest auscultation due to pneumomediastinum
Dx: Definitive dx study = CONTRAST esophagram - positive = + leakage
Chest CT may be ordered first - shows pneumomediastinum, esophageal thickening
“Red wale” markings & cherry red spots are suggestive of what?
These are endoscopic esophageal variceal descriptions in which they are at very high risk of bleeding soon
When is a TIPS indicated in an esophageal varices bleed?
If bleeding despite endoscopic or pharmacologic treatment
C/I: Hepatic encephalopathy, infections
Mainstay of management to prevent rebleeds?
Nadolol
MOA: Decrease portal venous pressure with NON-selective beta blockers
Isosorbide
MOA: Long-acting nitrate (vasodilator) that reduces esophageal pressure
Type I hiatal hernia
“sliding” hernia = MC type (95%) - when GEJ comes loose & stomach w/ GEJ slide into the mediastinum (increases reflux)
Management: similar to GERD
Management of GERD
- Lifestyle modifications (elevation of HOB, avoid recumbency for three hours after eating, eating small meals, avoiding certain foods (fatty, spicy, citrus, chocolate, caffeinated), decrease ETOH intake, weight loss, smoking cessation
- “As needed” pharmacological therapy - OTC antacids, H2 blockers
- Initiation of scheduled pharmacological therapy - PPIs
**If alarm sx at any point (dysphagia, odynophagia, weight loss, bleeding) then order EGD
Alarm symptoms GERD
Dysphagia
Odynophagia
Weight loss
Bleeding
Gold standard GERD dx
24 hour ambulatory monitoring
Type II hiatal hernia
“rolling” hernia = when fundus of stomach protrudes thru diaphragm with GE junction remaining in anatomic location ….may lead to strangulation so ..
Tx = surgical repair of the defect to avoid complications
H. pylori triple thearpy
Clarithromycin
Amoxicillin
PPI
(CAP)
H. pylori quadruple therapy
Tetracycline
Metronidazole
PPI
Bismuth subsalicylate
Duodenal or gastric ulcers more common?
Duodenal 4x more common
All patients with a gastric ulcer need a ?
EGD w/ Bx to rule out malignancy
Alarm symptoms PUD
> 50 YO, dyspepsia, history of gastric ulcer, anorexia, weight loss, anemia, dysphagia
Follow up on gastric ulcer
ALL GU MUST BE FOLLOWED UP WITH ENDOSCOPY TO RULE OUT MALIGNANCY AND DOCUMENT HEALING!!!
Done 8-12 weeks after therapy initiation
Dyspepsia 2/2 duodenal ulcer - characteristics
Better w/ food
Worse 2-5 hours after eating
Worse at night
**Nocturnal sx clasically a/w duodenal ulcers
Gastric ulcers - characteristics of sx - onset
Food-provoked dyspepeia - bad pain soon after eating (30 min - 1 hr)
Weight loss (b/c afraid to eat)
Gold standard PUD dx
Endoscopy w/ bx
Causative factors, age, incidence, benign or malignant, pain worse or better with meals
Gastric vs duodenal - compare above characteristics
Duodenal:
- Cause - inc in DAMAGING factors (acid, H. pylori)
- Age - MC in younger pt (30-55)
- Incidence- 4x MC, BENIGN
- Pain BETTER w/ meals, worse 2-5 hours after meals
Gastric:
- Cause - decrease in mucosal protective factors (dec mucus, bicarb, prostaglandins, NSAIDs)
- Age - MC in OLDER pt (55-70)
- Pain WORSE w/ meals (& for 1-2 hrs after too)
- LESS common, 4% are MALIGNANT
What is the most important risk factor for gastric carcinoma?
H. pylori
MC type of gastric cancer
ADENOcarcinoma - gAstric
What is linitis plastica?
Diffuse thickening of the stomach wall w/ “leather bottle” appearance due to gastric cancer infiltration = WORSE type
Superficial spreading = best prognosis/type of gastric cancer
CP gastric cancer
EARLY SATIETY!!!
(tumor filling up stomach = full easier…duh)
Iron-deficiency anemia 2/2 small amt bleeding
Signs of mets gastric ca
Supraclavicular LN = VIRCHOW
Umbilical LN = sister mary joseph
Ovarian mets = krukenburg tumor
Left axillary LN = IRISH sign
Bilirubin metabolism - prehepatic, intrahepatic, posthepatic
Pre-hepatic -
Bilirubin produced by heme metabolism (2/2 RBC destruction). Heme degraded by macrophages in RES = green biliverdin to –> bilirubin (red/orange) -this unconjugated bilirubin is sent to liver for conjugation & excretion
Intrahepatic -
Hepatocytes conjugate the bilirubin w/ enzyme UGT. This conjugated bilirubin (d. bili) is now water soluble (for bile excretion)
Post-hepatic -
D. bili is mixed in with bile, transported thru biliary & cystic ducts to be stored in GB.
Conjugated bilirubin cannot cross intestinal wall. It is converted to urobilinogen which is oxidized by gut bacteria to stercobilin (give stool brown color), converted to urobilin in kidney & excreted in urine (give urine it’s color). Small amt converted back & reabosorbed for further use in biliary system (via enterohepatic circulation)
Therefore in disease where there is excess DIRECT (conjugated) bilirubin, it is excreted in the urine & stool –> if you have a biliary obstruction it prevents secretion of large portions of conjugated bilirubin from being excreted in stool which is normally given its brown color by the stercobilin. It stays in the blood, & goes to kidney where converted to urobilin –> The urinary excretion is not blocked so a lot of excretion from blood is shifted to urine = DARK urine & LIGHT stools in conjugated hyperbilirubinemia.
Why is dark urine & light-colored stool seen with conjugated (direct) hyperbilirubinemia?
In disease where there is excess DIRECT (conjugated) bilirubin, it is excreted in the urine & stool –> if you have a biliary obstruction it prevents secretion of large portions of conjugated bilirubin from being excreted in stool which is normally given its brown color by the stercobilin.
It stays in the blood, & goes to kidney where converted to urobilin –> The urinary excretion is not blocked so a lot of excretion from blood is shifted to urine = DARK urine & LIGHT stools in conjugated hyperbilirubinemia.
Urobilin is what gives urine its characteristic yellow color!
Why can you see dark urine with hemolysis (causes almost all cases of indirect (unconjugated) hyperbilirubinemia?
Because you have hemaglobinuria so the hemoglobin that’s being lysed from the RBC gets peed out in your urine…the dark urine is from that NOT from bilirubin
Increase bilirubin WITHOUT increased LFTs… = ?
Think inherited bilirubin metabolism disorders (Gilbert’s (dec UGT activity), or Crigler-Jajjar = NO UGT activity, dubin johnson - can’t excrete from hepatocyte)
Gilbert’s is v common!
Dubin johnson syndrome?
Isolated (mild - 2-5) conjugated hyperbilirubinemia (b/c hepatocytes can conjugate but not excrete the bilirubin how they’re supposed to = all conjugated bilirubin stuck in liver = dark
Dubin = DDD (3D’s)
Dubin
Direct
Dark liver
Indirect hyperbilirubinemia is 2/2?
Indirect = HemolysIIIIs & gIIIIIlbert’s!
Have I’s in them! Indirect starts w/ an I!
Cholestatic pattern of liver injury
Inc alk phos
Inc GGT
Inc bilirubin
Hepatocellular pattern of liver injury
Inc ALT & AST > others
ALT more sensitive for Liver dz
Which of the liver function tests is most sensitive for biliary injury?
GGT
But not specific
Increased ALP without increased GGT
Bone or gut issue not liver issue
Remember alk phos is also found in intestinal mucosa & bone
Inc ALT > 1000 AND + ANA…thinking?
Autoimmune hepatitis
+ANA
+ smooth muscle ab
+ Increased IgG
= Autoimmune issue
Labs for viral or toxic ACUTE liver injury
ALT> AST –> both very high
AST & ALT > 1000 –> think ACUTE viral hepatitis
Labs consistent with CHRONIC liver injury
Increased INR
Low albumin
Cholelithiasis - CP, RF, Dx, Tx
CP: Colicky, sudden onset, INTERMITTENT RUQ abd pain after big fatty meal, lasting 30 min - several hours
RF: Family history, native american = strongest factors. Also Fat, fair, female, forty, fertile etc
Dx: Ultrasound
Tx:
ASX –> observe
Symptomatic –> Elective cholecystectomy
Choledocolithiasis - CP, complications
Gallstone in CBD a/w ductal dilation
CP: ASX = MC (>50%) - may be incidental finding when doing studies for other reasons or during evaluation of abnormal LFTs on routine testing
Complications: Acute pancreatitis, acute cholangitis
Initial test ordered choledocolithiasis
Trans-abdominal US