GI-/nutritional 11% Flashcards
Tearing rectal pain and bleeding which occurs with or shortly after defecation, bright red blood on toilet paper
Anal fissure
Treatment for anal fissure
Sitz baths, increase dietary fiber, and water intake, stool softeners or laxatives
Usually heals in 6 weeks
Botulinum toxin A injection (if failed conservative treatment)
What are the 4 cardinal signs of strangulated bowel?
The 4 cardinal signs of strangulated bowel: fever, tachycardia, leukocytosis, and localized abdominal tenderness.
Presents with: diffuse abdominal pain, nausea, and several episodes of emesis
He has not had any flatus for at least 2 days
He has a midline abdominal scar and a right subcostal scar
ABD X-ray: air fluid level
Small bowel obstruction
Diagnostics of small bowel obstruction
Abdominal series
CT Abdominal and pelvis
What is Treatment for SBO?
1st
Patients with SBO are often significantly dehydrated. Aggressive fluid resuscitation (with an isotonic intravenous fluid such as normal saline) and electrolyte repletion. + NGT
- Complete obstruction: 12-24 hr NPO
SBO with signs of bowel ischemia/peritonitis?
SURGICAL EMERGENCY
Gradually increasing abdominal pain with longer intervals between episodes of pain,
abdominal distention, obstipation,
less vomiting (feculent),
more common in the elderly
LARGE BOWEL OBSTRUCTION
FEBRILE + TACHYCARDIA –> SHOCK
MCC of large bowel obstruction
CANCER stricture hernia volvulus Fecal impaction
KUB shows dilated loops of bowel with air-fluid levels with little or no gas in the colon is what?
Large bowel obstruction
Physical exam finding of LBO?
Look for vomiting of partially digested food, severe abdominal distensions and high pitched hyperactive bowel sounds progressing to silent bowel sounds.
The initial diagnosis of cholelithiasis is best made with what imaging technique?
US
stones in the gallbladder (i.e., gallstones) without inflammation
Cholelithiasis
CARDINAL SYMPTOM OF GALLSTONES DUE TO TEMPORARY OBSTRUCTION OF CYSTIC DUCT
biliary colic
Complications of cholelithiasis
CHOLECYSTITIS : cystic duct obstruction by gallstones
CHOLEDOCOLITHIASIS:
gallstones in the biliary tree – associated with ductal dilation and biliary colic or jaundice. Treat with stone extraction via ERCP
CHOLANGITIS
biliary tract INFECTION secondary to obstruction by gallstones. Diagnose with ERCP
Abrupt RUQ pain constant slowly resolves 20min- hrs nausea precipitated by fatty foods and large meals
BIliary colic
Right subscapular pain of biliary colic is known as?
BOAS SIGN
As ALK-P is not specific to liver what is it also elevated in?
Bone, gut and placenta
ELEVATED ALK-P with GGT
Obstruction to bile flow (cholestasis) in any part of biliary tree
IF normal makes cholestasis unlikely
What are some of the causes of DECREASED ALBUMIN
1st - Chronic liver disease
- Nephrotic syndrome
- -Malnutrition
- inflammatory state (Burn, sepsis, trauma)
When is PT prolonged?
PT is not prolonged until most of the liver’s synthetic capacity is lost, which corresponds to advanced liver disease.
Asx cholelithiasis aka Biliary colic TX
observe
symptomatic patients with cholelithiasis Tx?
Cholecystectomy
What does
4Fs represent?
Fat, Forty, Female, Fertile
What are Gallstones have been classified into all of the following
Cholesterol
Pigment
mixed
Which antibiotic is a major cause of biliary sludge?
Ceftriaxone is a major cause of biliary sludge. The mechanism of biliary sludge formation during ceftriaxone therapy appears to be the propensity of ceftriaxone to bind calcium and form insoluble crystals in bile in the gallbladder, resulting in biliary sludge or frank stones
Inflammation of the gallbladder; usually associated with gallstones
RUQ pain after a high-fat meal
Low-grade fever, leukocytosis, JAUNDICE
cholecystitis
What is the most specific test for acute cholecystitis?
HIDA SCAN
Chronic cholecystitis may lead to
porcelain GB (premalignant condition)
Patients with chronic cholecystitis rarely have abnormal laboratory studies
Which of the following signs is associated with acute cholecystitis?
Murphy’s sign
Prophylactic cholecystectomy for asymptomatic cholelithiasis is generally
not recommended
Ultrasound findings that suggest acute cholecystitis are
pericholecystic fluid, gallbladder thickening, and sonographic Murphy sign. CT scan and MRI is more sensitive in diagnosis of choledocholithiasis
The HIDA scan is expensive and reserved for cases in which the ultrasound study or CT scan is nondiagnostic but there is a high suspicion of cholecystitis.
WHAT ARE THE COMPLICATIONS OF GALLSTONES?
Acute cholecystitis
Hydrops of gallbladder
Gastric outlet obstruction
Acute biliary pancreatitis
A patient with cirrhosis develops acute hepatic encephalopathy. Initial pharmacologic treatment of this disorder consists of which of the following?
Asterixis (flapping tremor), dysarthria, delirium, coma
Lactulose
as it binds to ammonia in GI tract and comes out as diarrhea
What is late sign of hepatic fibrosis?
Cirrhosis
Characterized by regenerative nodules surrounded by dense fibrotic tissue
The liver unable to regenerate due to large amounts of scar tissue
most common cause of cirrhosis
Chronic hepatitis
Other causes:
Chronic HEP C
ALCOHOL ABUSE
↑ Copper, ↓ Ceruloplasmin + family history
Wilsons disease
spider angiomata, palmar erythema, jaundice, scleral icterus, ecchymoses, caput medusae, hyperpigmentation
Cirrhosis
α-fetoprotein level at diagnosis to screen for
hepatocellular carcinoma
Screen every 6 months with US
why All patients with cirrhosis should undergo esophagogastroduodenoscopy (EGD)
to rule out esophageal varices
best follow-up test for HCC if α-fetoprotein elevated and/or liver mass found on ultrasound
MRI
Fever and abdominal pain in a patient with cirrhosis think
SBP
Dx: with cell count of ascites fluid
triad of abdominal pain, ascites, and hepatomegaly
Budd Chiari (hepatic vein thrombosis)
GOLD STANDARD and is often required for definitive diagnosis of cirrhosis
Liver Biopsy
Typically AST > ALT. Enzymes normalize as cirrhosis progresses
↑ ALP and ↑ GGT
Anemia from hemolysis, folate deficiency, and splenomegaly
Decreased platelet count from portal hypertension with splenomegaly
Decreased bilirubin conjugation by the liver ⇒ ↑ unconjugated bilirubin ⇒ jaundice
Decreased albumin production by the liver ⇒ hypoalbuminemia
Decreased clotting factor production by the liver ⇒ Prolonged prothrombin (PT),
Liver cirrhosis
Ultrasound: helpful to determine liver size and evaluate for hepatocellular carcinoma
- Treatment for Cirrhosis?
- How to treat autoimmune hepatitis?
- how to Tx Wilson’s disease?
- How to treat DECOMPENSATION related to cirrhosis?
- What is the primary prophylaxis against variceal related hemorrhage?
- what is the treatment for encephalopathy?
- How to reduce ascites?
- Medication to treat pruritus related to uremia or cirrhosis?
- cirrhosis is irreversible
- –Stop alcohol
- –Antiviral treatment for Hepatitis C
- –For advanced cirrhosis ⇒ liver transplant may be necessary - Corticosteroids for autoimmune hepatitis
- Chelation therapy (e.g. penicillamine) for WILSONS Dz
- Diuretics, antibiotics, laxatives, enemas, thiamine, steroids, acetylcysteine, pentoxifylline for DECOMPENSATION
- Nonselective BB (nadolol and propranolol) for primary prophylaxis against
- -variceal hemorrhage or ——–esophageal variceal ligation (EVL) - Encephalopathy ⇒ lactulose + neomycin or Rifaximin
- ASCITES ⇒
sodium restriction, paracentesis, spironolactone, lasix - PRURITUS: ⇒ cholestyramine (QUESTRAN)
Polyps in the distal colon are commonly benign if seen in the proximal colon they are more likely
CANCEROUS
Villous adenomas have a 30-70% risk of malignant transformation
The most common cause of painless rectal bleeding in the pediatric population
polyp
Once identified follow-up colonoscopy in 3-5 years
development of hundreds to thousands of colonic adenomatous polyps
Familial adenomatous polyposis (FAP)
Autosomal dominant
Risk of colorectal cancer 100% by 30-40 years of age
The family should undergo yearly sigmoidoscopy beginning at 12 years of age
Prophylactic colectomy recommended
Painless rectal bleeding and a change in bowel habits in a patient 50-80 years of age
COLON CANCER
Apple core lesion on barium enema
ADENOMA MC
Screening with colonoscopy begins at 50 then every 10 years until
75
Fecal occult blood testing – annually after age 50
Flexible sigmoidoscopy – every 5 years with FOB testing
Colonoscopy – every 10 years
CT colonography – every 5 years
More likely to be malignant
sessile, > 1 cm, villous
Tumor Marker: CEA
Less likely to be malignant colon cancer
Pedunculated, < 1 cm, tubular
Patients who are older than 50 with new-onset constipation should be evaluated for
Colon cancer
laxatives? 3
Bulk-forming laxatives first line — Bulk-forming laxatives include psyllium seed (eg, Metamucil), methylcellulose (eg, Citrucel), calcium polycarbophil (eg, FiberCon®), and wheat dextrin (eg, Benefiber)
Osmotic laxatives can be used in patients not responding satisfactorily to bulking agents. Start with low-dose polyethylene glycol (PEG) as it has been demonstrated to be efficacious and well-tolerated in older adults.
Stimulant laxatives — Stimulant laxatives affect electrolyte transport across the intestinal mucosa and enhance colonic transport and motility.
The most common cause of acute diarrhea
Hypokalemia and metabolic acidosis
Diarrhea breakout in a daycare center: Rotavirus
Diarrhea on a Cruise Ship: Norovirus
Traveler’s diarrhea:
Prophylaxis:
FQ
E coli
Occurs in the first 2 weeks of travel, lasts 4 days without treatment
Defined as: 3+ unformed stools in 24 h with at least one of the following: fever, nausea, vomiting, abdominal cramps, tenesmus, bloody stools
Complications: Dehydration (MC), Guillain-Barre, Reiter syndrome
TX: Empiric treatment with ciprofloxacin 500 mg BID × 1-3 d and loperamide (if older than 2 y)
1.Diarrhea after a picnic and egg salad:
2Diarrhea from shellfish
- Diarrhea from poultry or pork
- Diarrhea in a patient post antibiotics
- Diarrhea in poorly canned home foods
1.Staph. A
2.Vibrio cholerae
Tx:
- Salmonella
Tx: Ceftriaxone and sometimes a fluoroquinolone or azithromycin - C. diff
- C. perfringens
Diarrhea after drinking (not so) fresh mountain stream water
Dx:
Tx:
Giardia lamblia - incubates for 1-3 weeks,
causes foul-smelling bulky stool and
wax and wane over weeks before resolving
Dx: stool cyst or trophozoites
Tx: Tinidazole
OR
flagyl
a flu-like bacterial infection characterized by fever, GI symptoms, and headache
Transmitted via the consumption of fecally contaminated food or water
GI symptoms may be marked constipation or “pea soup diarrhea”
Rose spots may be present (2-3 mm papule on trunk usually)
More common in the developing world (usually immigration cases)
- Enteric fever (salmonella typhi):
TX:
Ceftriaxone and sometimes a fluoroquinolone or azithromycin
No treatment except in immunocompromised or enteric fever (S. typhi)
predominantly affects children
and is often spread in areas with crowded conditions (like daycare centers)
Abdominal pain + inflammatory diarrhea (small volume) frequent, mucous and bloody stool,😡
nausea, vomiting (less common), possible fever
Shigellosis
Tx: TMP-SMX
Alternative:
Cipro/FQ
Drugs to stop diarrhea (such as diphenoxylate or loperamide) may prolong the infection and should not be used