Labs Flashcards
Hyponatremia
Normal: 136 - 145 mEq/L
Causes: loop diuretics, heart failure, renal failure, CHF, cirrhosis, edema
Hypernatremia
Normal: 136-145 mEq/L
Causes: renal dysfunction, fever, burns, thirst, excessive diarrhea/vomiting/sweating
Hypokalemia
Normal: 3.5-5 mEq/L
Causes: insulin, loop and thiazide diuretics, refeeding syndrome
Hyperkalemia
Normal: 3.5-5 mEq/L
Causes: meds like cyclosporine, metabolic acidosis, renal disease, adrenal insufficiency (Addison’s disease)
Hypophosphatemia
Normal: 3-4.5 mg/dl
Causes:
- increased phos binders
- Tums (has Ca)
- refeeding syndrome
- low intake
- HYPERPARATHYROIDISM
Hyperphosphatemia
Normal: 3-4.5 mg/dl
Causes: high phos diet, not enough phos binders
Hypocalcemia
Normal: 4.5-5.5 mEq/L; 9-11 mg/dl
Causes: vitamin D deficiency, glucocorticoids, loop diuretics, hyperphosphatemia, hypoalbuminemia, renal failure
Hypercalcemia
Normal: 4.5-5.5 mEq/L; 9-11 mg/dl
Causes: hyperparathyroidism, malignancies, calcium supplements, excessive vitamin D intake
Low BUN
Normal: 10-20 mg/dl
Causes: fluid overload, liver disease, malnutrition
meat intake could throw off BUN test
High BUN
Normal: 10-20 mg/dl
Causes:
dehydration
- fever
- burns
- CHF
renal dysfunction
- high protein diet
- kidney stones
- DKA
meat intake could throw off BUN test
Low creatinine
Normal: 0.6-1.4 mg/dl
Causes:
- muscle mass loss (elderly)
- muscle atrophy
- SCI
- liver disease
- fluid overload
- low protein diet
High creatinine
Normal: 0.6-1.4 mg/dl
Causes: Renal dysfunction, catabolism, athletes, hyperthyroidism, certain cancer and antibiotic meds
Elevated BUN:Cr ratio
Normal: 10:1-15:1
Causes: renal disease, CHF, dehydration
d/t decreased blood flow to kidneys
Hypoalbuminemia
Normal: 3.5-5 g/dl
Causes: surgery, trauma, infection, inflammation, Crohn’s, poor PO d/t illness, edema, fluid overload
3 week half life, doesn’t reflect current protein intake
Hyperalbuminemia
Normal: 3.5-5 g/dl
Causes: dehydration, severe diarrhea
3 week half life, doesn’t reflect current protein intake
Low pre-albumin (transthyretin)
Normal: 16-40 mg/dl
Causes:
- surgery, trauma, chronic illness
- low intake
High pre-albumin (transthyretin)
Normal: 16-40 mg/dl
Causes: pregnancy, kidney disease, alcoholism
Low Ferritin
Normal: F 10-150 ng/dl; M 12-300 ng/dl
Causes: iron deficiency
High Ferritin
Normal:
- F 10-150 ng/dl
- M 12-300 ng/dl
Causes: liver disease, trauma, inflammation
Low Transferrin (TIBC)
Normal: >200 mg/dl
Causes: liver disease, protein loss, trauma, inflammation
High Transferrin (TIBC)
Normal: >200 mg/dl
Causes: iron deficiency
Hematocrit
Normal: F 37-47%; M 42-52%; Pregnant 33%; Newborn 44-64%
Low Hemoglobin
Normal: pregnant >11 g/dl; F 12-15 g/dl; M 14-17 g/dl
Causes: anemia, heavy menstrual cycle, nutrient deficiency, kidney disease
High Hemoglobin
Normal: pregnant >11; F 12-15 mg/dl; M 14-17 mg/dl
Causes: smoking, living in high altitudes
What is the normal level of RBP (retinol binding protein)? What does it circulate with?
3-6 mg/dl
Pre-albumin
What is the normal level of Creatinine Height Index (CHI)? What does it estimate?
80%
Lean body mass/somatic protein
What is the normal level of urinary creatinine clearance? What does it measure?
115 +/- 20 ml/min
GFR, renal function
What is the normal total lymphocyte count? What does it measure and when is it decreased?
> 2700 cells/cu mm
Measures immunocompetency
Decreased in protein/kcal malnutrition
What is normal prothrombin time (PT)? How do anticoagulants affect it?
11-12.5 seconds; 85-100% of normal
Anticoagulants prolong PT
What are the normal/at risk/bad ranges for total cholesterol?
Normal: <200 Mg/dl
At risk: 200-239 mg/dl
Bad: >240 mg/dl
What are the normal/at risk/high ranges for triglycerides?
Normal: <149 mg/dl
At risk: 150-199 mg/dl
High: >200 mg/dl
What are the normal/at risk/high ranges for LDL?
Normal: <100 mg/dl
At risk: 130-159 mg/dl
High: >160 mg/dl
What are the normal/at risk ranges for HDL?
Normal: >60 mg/dl
At risk: <39 mg/dl
Normal/elevated/stage 1/ stage 2 ranges for BP?
Normal: <120/80 mmHg
Elevated: systolic 120-129 AND diastolic <80
Stage 1: systolic 130-139 OR diastolic 80-89
Stage 2: systolic at least 140 OR diastolic at least 90 mmHg
Normal/impaired/diabetes BG levels?
Normal: FPG 70-100, 2hPG <140
Impaired: FPG 100-125, 2hPG 140-199
Diabetes: FPG 126+, GTT 200+