GI disorders Flashcards
Cirrhosis - Later Clinical Manifestations
Cirrhosis - most common causes
- Alcoholism
- Hepatitis B & C
- Hepatotoxic meds
Cirrhosis - patho
Infiltration + accumulation of fatty deposits - fibrotic changes - destroy hepatocytes = widespread scar formation - decreased liver function - obstructed blood flow - increased portal pressure
Cirrhosis - S/s early
Anorexia
Generalized fatigue
Abdominal pain
GI symptoms - N+V, diarrhea
Cirrhosis - S/s - disease progression
Weight loss
Bleeding
Jaundice
Ascites
Esophageal varices
Portal HTN
Telengiectasis (spider angiomas)
Cirrhosis - Jaundice (Icterus) - causes & S/s
Obstructed billary ducts
Liver cannot breakdown old RBCs
- Steatorrhea - white, clay color stool - bile needed to break down fat
- Dark urine (maple syrup) - kidneys filter elevated billirubin from blood
- Pruritus
Cirrhosis - Ascites - patho
increased hydrostatic pressure from portal HTN → blood proteins leak into peritoneum; liver unable to synthesize protein → low blood albumin; fluid shifts out of vascular
system into peritoneum → third-spacing occurs; liver cannot metabolize aldosterone → kidneys
retain Na & water; increased vascular volume → further leakage of fluid into abdominal cavity
Cirrhosis - Ascites - S/s
Weight gain
Abdominal (umbilical) hernias
Abdominal distention
Cirrhosis - Ascites - TX
- Low sodium diet
- Aldosterone antagonist - Spironolactone (Aldactone)
- Paracentesis - symptomatic relief - sitting up or side lying ; suprapubic - empty bladder ; Monitor - VS, weight (pre and post), I+O, electrolytes
- Refractory ascites - TIPS - catheter and shunt within hepatic system - connects to the jugular
Cirrhosis - Portal HTN - patho
increased pressure from fibrotic changes → back-up of blood in GIsystem → splenomegaly; veins in esophagus, stomach, intestines, abdominal wall & rectum
dilate → esophageal varices, prominent abdominal veins, hemorrhoids, ascites.
Cirrhosis - Esophageal varices
Patho - thinner, less elastic esophageal veins unable to compensate for increasedpressure → pressure increases, varices enlarge, begin to bleed
- Frank hematemesis - vomitting blood
- Coffee-ground emesis
- Melena, (black tarry stools)
Cirrhosis - Esophageal varices and portal HTN - TX
- Reduce portal HTN - beta-blockers + nitrates
- EGD + banding or ligation
- EGD + Sclerotherapy
- Acute !!! - vasoconstrictive meds - IV - Vasopressin or octreotide
- Sengstaken-Blakemore or Minnesota tube - Airway !!!- pt intubated, on the vent, sedated
Esophageal varices - IV Vasopressin vs IV Octreotide
- IV Vasopressin - systemic - can worsen portal HTN
- IV Octreotide (Sandostatin) - specific - constricts just GI area
Cirrhosis - Hepatic Encephalopathy - patho
Elevated ammonia & toxins in blood
- Ammonia - by-product of digestion of dietary & blood proteins
- Ammonia absorbed from intestinal tract not metabolized by diseased liver
- Ammonia accumulates in blood
a. Altered mental states: Confusion → coma
b. Asterixis - flapping tremor of hands - High protein diet & GI bleeding - aggravate condition (more protein)
Cirrhosis - Hepatic Encephalopathy - TX
- Lactulose
- Low protein diet ; early in cirrhois - high protein
- Neomycin - antibiotic - decrease bacterial flora needed to breakdown protein
Lactulose
Promote excretion of ammonia ; tx of constipation
Improvement in mental status
Expect 2-3 soft stools/day
Watch for diarrhea
Coma - NG, rectal
Cirrhosis DX
- LABS: Liver function panel, serum ammonia, clotting studies, protein + albumin, bilirubin , CBC, H+H, vitamin deficiencies
- CT, MRI, US
- Liver biopsy - Definitive !!! - supine, arm elevated behind head , US guided, between ribs - BLEEDING - stay for 6 hrs, H+H compared
Liver Functions
- _ Metabolism :_Glucose, fat, proteins
- _Conversion: _Ammonia to urea
- _Detoxification: _Drugs, alcohol, toxins
- _Breakdown of RBCs: _Formation of bile
- Production:** **Clotting factors, blood proteins, enzymes **
Hepatitis A (HAV) - causes
Transmitted by the fecal-oral route
1. Non-life threatening, usually self-limiting
HAV - Prevention
- Good hand washing
- Avoid contaminated food & water
- If exposed, receive IgG within 2 weeks
- Get vaccinated (HAVRIX & VAQTA) if:
a. traveling to areas with high incidence
b. living in crowded conditions
c. working in correctional facilities, day-care centers, long-tem care
Hepatitis B (HBV) - causes
Transmitted through blood & serum
- Unprotected sex
- Sharing needles or through accidental needle sticks
- Blood transfusions before 1992
- Hemodialysis
- Maternal-fetal route
- Cosmetic procedure like tattooing & body piercing
HBV - Prevention
- Avoid exposure to blood & body fluids
- Follow standard precaution
- Use needless systems
- Get Vaccinated - 3 doses - 1st; 2nd 1 mo later; 3rd 2 mo after 2nd.
Hepatitis C (HCV) - causes
Transmitted blood to blood
- Sharing needles - illicit drug users have highest incidence
- Receiving blood products or organ transplant before 1992
- Unsanitary tattoo or piercing equipment
- Sharing tools for snorting cocaine
HCV - Prevention and labs
Education of high-risk groups
- Enzyme-linked immunosorbent assay (ELISA)
- Recombinant immunoblot assay (RIBA)
Liver biopsy
Chronic hepatitis - TX
A. Rest - promote regeneration & healing, reduce metabolic demands on liver
B. Nutrition - high CHO, normal protein & fat content, small freq meals
C. Medications
1. Antiemetics
2. Antiviral drugs - reduce the viral load
Antiretroviral agents
3. Immunomodulator
Chronic hepatitis - Education
- Prevent spread of infection
- Avoid alcohol and OTC mediations (acetaminophen)
- If traveling - drink bottle water, or water from purification system, avoid foods washed or prepared with tap water (fresh fruits & vegetables)
* Complications - cirrhosis & liver cancer
Hepatitis - causes
Viral (most common), hepatotoxic medications, alcohol, altered immune
responses environmental toxins
Hepatitis - patho
- liver becomes enlarged & congested with
inflammatory cells, lymphocytes & fluid; widespread inflammation & edema leads to
increased pressure within liver portal system, interferes with blood flow → ischemia &
necrosis; edema of the biliary ducts → obstruction & jaundice
Primary liver cancer
- two types
- Hepatocellular carcinoma - develops from hepatocytes
a. 90% linked to chronic viral hepatitis, & cirrhosis. - Cholangiocarcinoma - originates from bile duct cells
Liver Biopsy - definitive diagnosis
Treatment - palliative
- Surgery
- Chemotherapy and hepatic artery embolization
- Liver transplant
Pancreatitis - patho
Autodigestion of pancreatic tissue by pancreatic enzymes
a. Obstruction of the pancreatic duct → increased production of pancreatic enzymes (lipase, trypsin, kallikrein). Activation of enzymes → vasodilation,
increased vascular permeability, edema, necrosis & hemorrhage
Pancreatitis - causes
- Cholelithiasis
- Alcohol & drug use
- Pancreatic tumors or cysts
- Abdominal trauma, surgical manipulation
- Infection
- Corticosteroids, Thiazide diuretics (Hydrochlorothiazide)
Pancreatitis - Pain
Severe pain
a. Midepigastric or LUQ pain - can radiate to the back or left shoulder
b. N & V
c. Assume fetal position
Pancreatitis - Pain TX
- NPO – bowel rest; possible NG tube
- IV hydration
- Analgesics – Dilaudid, Morphine, Fentanyl, Dilaudid
- Anticholinergics - Bentyl, Pro-Banthine
- Antisecretory agents - somatostatin & octreotide
- Antiemetic
- PPIs & H2 blockers
- Antispasmodic (Vistaril, Atarax)
Bentyl & Pro-Banthine
Anticholinergic - decrease GI motility - decrease secretion of pancreatic enzymes
TX of pancreatic pain
SE - dry mouth
- Serum amylase
- Serum lipase
- elevated 1st
- more DX - elevated for longer
* Classic labs for pancreatitis
In addition - Hypocalcemia - Tetany (Chvostek’s and Trousseau’s sign).
Pancreatitis - Complications
- Hypovolemia, hemorrhage & shock
- Acute renal failure
- Respiratory complications - pleural effusion, atelectasis, & pneumonia, leading to ARDS
- DIC
- Diabetes mellitus
- Sepsis & Multi-organ system failure (MOSF)
Pancreatitis - Diet
- Small frequent meals - 4-6 times/day
- Low fat, high carbs and protein
- Bland food - no spices or stimulants
Pancreas - function
- Exocrine gland enzymes - help break down carbohydrates, fats, proteins, and acids in the duodenum. These enzymes travel down the pancreatic duct into the bile duct in an inactive form. When they enter the duodenum, they are activated. The exocrine tissue also secretes a bicarbonate to neutralize stomach acid in the duodenum.
- Endocrine gland hormones - insulin and glucagon (which regulate the level of glucose in the blood), and somatostatin (which prevents the release of the other two hormones).
- Turner’s sign
- Cullen’s sign
- flank discoloration (ecchymosis)
- periumbilical ecchymosis
** Necrotizing, hemorrhagic pancreatitis
Cholecystitis vs Cholelithiasis
inflammation of the GB vs stones in the gallbladder