REx PN Examination Questions With
Correct And Revised Answers
What is the normal lab value for sodium? - answer✔✔135-145 mEq/L
What is the normal lab value for potassium? - answer✔✔3.5-5.0 mEq/L
What is the normal lab value for chloride? - answer✔✔95-105 mEq/L
What is the normal lab value for magnesium? - answer✔✔1.5-2.5 mEq/L
What is the normal lab value of calcium? - answer✔✔8.5-10.5 mE/L
What is the normal lab value for phosphorus? - answer✔✔2.5-4.5 mg/dL
What is the normal lab value for rbc's? - answer✔✔4.5-5.0 million
What is the normal lab value for wbcs? - answer✔✔4.5 to 11.0 million
What is the normal lab value for PLT?
(platelet count) - answer✔✔150-400 x10^9
What is the normal hemoglobin lab value? Men & female - answer✔✔Men: 140-180
Female: 120-160
What is the normal lab value of pH? - answer✔✔7.35-7.45
What is the normal lab value for CO2? - answer✔✔35-45 mEq/ L
What is the normal lab value of HCO3? - answer✔✔24-26 mEq/ L
What is the normal lab value of PaO2? - answer✔✔80-100%
What is the normal hematocrit? (Men and Female) - answer✔✔Men: 0.42-0.54 volume fraction
Female: 0.37-0.47 volume fraction
What is the normal lab value of MCV?
What is the normal lab value of glucose? - answer✔✔4-6 mmol
What is the normal lab value HBA1C? - answer✔✔Non-diabetic: 4-5.9%
Good diabetic control: <7%
Optimal control in the elderly: <8.5%
What is the normal lab value of random blood sugar? - answer✔✔3.1-11.1 mmol
What is intravascular fluid? - answer✔✔fluid inside the blood vessel
What is intracellular fluid? - answer✔✔fluid inside the cell
What is extracellular fluid? - answer✔✔fluid outside the cells
*includes interstitial fluid, bone, blood, connective tissue, water
What IV fluids are isotonic?
What is isotonic fluids? - answer✔✔-no osmotic force, cells neither swell nor shrink
-0.9% NS
-D5W
-Lactated ringers
What is hypotonic fluids?
What IV fluids are hypotonic? - answer✔✔-more dilute solutions, causes water to enter cells**
watch for edema
-0.45% NS
-0.33% NS
What is hypertonic fluids?
What IV fluids are hypertonic? - answer✔✔-more concentrated solution, water is removed from
the cells
-3% NS
-5% NS
-D5W with 1/2 NS
-D10W
-D5 LR
What IV fluids are colloid? - answer✔✔-fluid moves from the interstitial to intravascular
compartment
**given in severe hypovolemia
When should you monitor your patients for electrolyte balance? - answer✔✔Pts with severe
diarrhea and vomiting
What are the ECG changes with low potassium? - answer✔✔-ST depression
-shallow/ flat/ inverted T wave, U wave
What are the ECG changes with high potassium? - answer✔✔-tall peaked T wave
-flat P wave
-wide QRS
What are the ECG changes with low calcium? - answer✔✔-prolonged ST + QT
What IV fluid do you NEVER give by IV push? - answer✔✔Potassium
**always given in a diluted minibag
What are the ECG changes with high calcium? - answer✔✔-shortened ST
-wide T wave
What is hypocalciemia a sign of? - answer✔✔positive trousseaus and chvosteks sign
What are the ECG changes with of low magnesium? - answer✔✔-tall T wave
-depressed ST
What are the ECG changes with high magnesium? - answer✔✔-prolonged ST
-wide QRS
What is the antidote for magnesium toxicity? - answer✔✔calcium gluconate
What does a decreased phosphorus level indicate with calcium? - answer✔✔decreased
phosphorus levels = increase in calcium levels
What is acidosis? - answer✔✔-pH below 7.35
-RR increases to try and exhale acids
What is alkalosis? - answer✔✔-pH above 7.45
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