Final Flashcards
Cirrhosis patho
- Cells become fibrotic adn dead -> enlarge
- Vessel becomes narrow
- Pressure increase, fluid abck up
- Distension, varice formation
- Third-spacing
Causes of cirrhosis
EtOH abuse
HCV
Fatty liver disease
Child Pugh Scoring
Grade A <7
Grade B 7-9
Grade C 10-15
Clinical manifestations of cirrhosis
Jaundice
LFTs (only acutely)
Low albumin
High PT and INR (d/t low clotting factors)
Decrase in platelets
Cirrhosis complications
Ascites
Portal HTN
Variceal bleeding
Spontaneous bacterial peritonitis
Hepatic encephalopathy
Hepatorenal syndrome
Ascites presentation
Full tense bulging abdomen
Ascites dx
Abdomen ultrasound then paracentesis
Ascites treatment
MRA (aldosteorne antag; spironolactone)
Add Loops to avoid hyperkalemia (40:100 ratio for optimal diuresis
Midodrine to raise bp if needed
LVP if above no longer works (remove 4-8L QOW; give with 8g IV albumin)
TIPS if above no longer works
Portal HTN dx
SAAG (serum albumin - paracentesis albumin) > 1.1
Portal HTN treatment
If varices present on endoscopy: non-selective beta blocker (start low and then titrate until HR ~60; HOLD if SBP <90, DBP <60 or HR <50
Agents: propranolol, nadolol carvedilol (strongest bp lowering effect)
Acute variceal bleeding treatment
Supportive care (isotonic fluids, O2 PRN, PRBC PRN for goal Hgb 8g/dL)
Octreotide
EVL - choke off bleeding
Ceftriaxone (or other 3rd gen cephalosporin) 7D F SBP PPX
Non-selective beta blocker once bleed stabilizes
Spontaneous bacterial perotonitis (SBP) pathogens
Enteric gram (-): E. coli, K. pneumoniae
Gram (+): S. pneumoniae
SBP dx
Paracentesis: calculate absolute PMN count and take culture
PMN count: WBC in ascitic fluid * %PMN
Have SBP if PMN >250
SBP treatment
3rd gen cephalosporiin (ceftriaxone, cefotaxime) 5D
can do cipro if anaylactic reaction to beta-lactams
Take a repeat paracentesis 48H after ABX start, PMN didn’t drop 25% -> escalate to carbapenems
IV albumin 1.5g once then 1g/kg on day 3
Which pts should receive SBP PPX indefinetly and what agents are used
PMHx of SBP
Low ascitic protein + other risk factors
Cipro or bactrim DS
Hepatic encephalopathy presentation
Altered mental status (d/t high ammonia levels, levels do NOT correspond with severity)
Slow to respond
Eventual coma
Hepatic encephalopathy treatment
Remove precipitating factors
Dairy and vegetable protein (even though they make ammonia, these specific proteins are less likely to cross BBB than animal)
Lactulose - traps ammonia in bowel to be eliminated in stool
Rifaximin - decreases the amount of ammonia-producing bacteria in colon
Hepatorenal syndrome dx
No improvement in SCr 2D after diuretic cessation and 2D of IV alumn
Cirrhosis with ascites with a SCr increase >0.3 from baseline or 50% increase from baseline in last 7D
Hepatorenal syndrome treatment
IV NE
IV albumin 1g/kg/day
Success if in 2 weeks SCr decreases to 1.5 or returns to <0.3 above baseline
D/C therapy if in 4 days SCr remains the same or rises above treatment values
Cirrhosis PKPD changes
Decreased blood flow -> higher systemic [ ] of high first pass drugs -> decrease dose
Loss of hepatocyte function -> affects phase I metabolism (CYP) -> try to use drugs with phase II metabolism
Decreased albumin production -> more unbound drug -> more therapeutic effect -> dose decrease
Increased SCr -> decreased renal function
Increased BBB permeability -> increased therapeutic response -> decrease dose
Fat soluble vitmains
A, D, E, K
Well retained in body and stored in fatty tissue (adipose, muscles, liver)
Takes a while to reach deficiency state but more likely to cause toxicity
Water soluble vitamins
B, C
Not retained well in body (except B12, stored in liver)
Readily excreted
Vitamin A function
Vision
Immunity
Cell differentiation
Vitamin A sources
Carrots
Leafy greens
Oranges
Dairy; animal products
Vitamin A signs of deficiency
Dermatitis
Night blindness
Bitot’s spots
Poor wound healing
Vitamin A signs of toxicity
Headache
N/V
Rash
Skin peeling
Vitamin D function
Ca and phosphate homeostasis
Bone metabolism
Vitamin D sources
Fish
Dairy products
Cereal
Sunlight
Vitamin D signs of deficiency
Osteomalacia, osteoporosis
Rickets
Muscle weakness
Poor growth
Vitamin D signs of toxicity
Hypercalcemia
Hypercalciuria
Soft tissue calcification -> kidney and CV damage
Vitamin E function
Antioxidant (protect from free radicals)
Prevent clotting
Enhance immune system
Vitamin E sources
Nuts/seeds
Fruits
Veggies
Vitamin E signs of deficiency
Hemolysis
Peripheral neuropathy
Skeletal muscle atrophy
Vitamin E signs of toxicity
Bleeding
Vitamin K function
Regulate clotting factors II, VII, IX, X
Vitamin K sources
Leafy greens
Meat
Vitmain K signs of deficiency
Bleeding
Elevated PTT
Vitamin B1 function
(Thiamine)
ATP generation
Peripheral nerve conduction
Vitamin B1 signs of deficiency
Anorexia
Fatigue
Depression
Impaired memory
Paresthesia
Wernicke’s encephalopathy
Vitamin B6 function
(Pyridoxine)
AMino acid metabolism
Neurotransmitter synthesis
Metabolism of lipids/steroids
Vitamin B6 signs of deficiency
Pellagra
Limb numbness/paresthesia
Convulsions
Microcytic anemia
Vitamin B 9 function
(Folic acid)
Neural tube formation
RBC production
Cell growth/function
Vitamin B9 signs of deficiency
Macrocytic anemia
Neural tube defects
Vitamin B12 function
(Cobalamin)
Syntehsis of DNA/RNA cell division
Vitamin B12 signs of deficiency
Spinal cord degeneration
Peripheral neuropathy
Paresthesia
Macrocytic anemia
Vitamin C function
Antioxidant acitivity
Immune function
Fe absorption
Connective tissue metabolism
Wound healing
Vitamin C sources
Citrus fruits
Leafy veggies
Vitamin C signs of deficiency
Scurvy
Petechiae
Bleeding gums
Poor wound healing
Vitamin C signs of toxicity
Abdominal pain
Diarrhea
N/V
Major minerals
Ca, Mg, Phos, K, Na
Need >100mg/day
Minor minerals
Need <100mg/day
Hypocalcemia
< 8.5 mg/dL
Tachycardia, seizures
Hypercalcemia
> 10.5 mg/dL
Confusion, kidney stones
Ca corrected equation
Ca corrected = Ca serum + [0.8 (4 - albumin)]
Hypomagnesmia
<1.4 mEq/L
Tremors, hypokalemia, nystagmus, seizures, ventricular arrhytmias, torsades
Hypermagnesemia
> 2mEq/L
Confusion, bradycardia, muscle weakness, heart block, delirium
Hypophosphatemia
<3.5 mEq/L
Muscle cramps, abdominal distension, dysrrhythmias
Hyperphosphatemia
> 5 mEq/L
Heart palpitaions, vfib
Vitamin and mineral goal in pts with eating disorders
Nutritional rehab
Restore weight gradually
Prevent refeeding syndrome
Vitamin and mineral goal in pts with EtOH abuse
Supportive therapy; replace fluids
Electrolytes
Ca
Phos
Mg
Fat soluble vitamins
Thiamine
Folic acid
Vitamin and mineral goal in pts who are pregnant
Prenatal vitamins
- folic acid
- Fe
- Ca
- VitD
- Iodine
Vitamin and mineral goal in pediatric pts
Supplement breastmilk with VitD and iron (formula already supplemented)
No whole milk until 1yr
Vitamin and mineral goal in geriatric pts
Focus on K, Ca, VitD, dietary fiber, B12
Vitamin and mineral goal in pts with macular degeneration
Give VitA, C, E
ARED (beta-carotene) or AREDS@ (lutein and zeaxanthin)
Interactions with vitamins and minerals
ABX
H2RA
Isoniazid
Methotrexate
PPI
Diuretics
When to consider (enteral) nutritional support
Inpt after 7 days of no eating (though ICU may need to start sooner)
Outpt pt with malnutrition or at risk for it
Why do we try to use enteral nutrition whenever we can?
Gut is biggest immune system organ
Using gut maintains gut integrity
Maintains bile flow (prevent bacteria from moving up and prevent stones)
Which medications require that feeds be held for 1-2 hrs before and after
Phenytoin
Quinnolones
Levothyroxine
Warfarin
Enteric nutrition: calorie requirement
20-30 kcal/kg/day
Special nutrition requirement for renal pts
Less volume
Less K and phosphate
Special nutrition requirement for pts with HF
Less volume
Special nutrition requirement for diabetic pts
More cal from fat and less from carbs
Fiber to slow absorption of carbs
Special nutrition requirement for burn/trauma pts
High protein
High cal
Special nutrition requirement for pts with pancreatitis
Low fat
Special nutrition requirement for pts with COPD/pulmonary disease
Lower carbs
Higher fat
How to determine amount of free water an enteral nutrition pt needs
1ml/kcal/day or 30-40 ml/kg/day
Check enteral formula and determine how much free water is coming from that, then subtract from total daily requirement. Split this remainder over 4-6 admins a day as free water
Which methods of enteral nutrition can use the crush and flush method for meds?
Gastric (NG and G tubes; mimic actual meals)
Duodenum
Which method of enteral nutrition canNOT use the crush and flush method and what do you do instead?
Jejunum (NJ and tubes) - meds have to be given as liquid
Crush med between 2 spoons and mix into 10mL of sterile water
Above which osmolality can liquid preps for enteral nutrition cause diarrhea?
> 600 Osm
What needs to be monitored in pts on enteral nutrition
Diarrhea (>3 liquid stool/day)
Bloating, abdominal distention (treat with pro-kinetic, switch to continuous infusion)
Electrolytes (Na, K, phos, Mg)
Exit site infection, leaking, bleeding if GI wall
Sinusitis if nasal tube
Asipiration (keep head of bed elevated at 30-45 degrees)
Maintain tube patency (flushing)`