Lab values & electrolytes worksheet with answers

Chronic kidney disease is usually defined by an eGFR below which value for more than 3 months?

1. A120 mL/min/1.73 m²
2. B90 mL/min/1.73 m²
3. C15 mL/min/1.73 m²
4. D60 mL/min/1.73 m²

Where are urinary casts formed?

1. AIn the kidney tubules
2. BIn the urinary bladder
3. CIn the urethra
4. DIn the ureters

Neutropenia is usually defined as an absolute neutrophil count (ANC) below about:

1. A5.0 × 10³/µL (5000/mm³)
2. B1.5 × 10³/µL (1500/mm³)
3. C150 × 10³/µL (150 000/mm³)
4. D15 × 10³/µL (15 000/mm³)

A patient on warfarin started eating large daily portions of kale and spinach. The INR has fallen. What advice is most appropriate?

1. ANever eat green vegetables again
2. BDouble the warfarin dose without telling the prescriber
3. CKeep the intake of vitamin K–rich foods steady from day to day
4. DStop warfarin until the diet is normal

A patient with sepsis has a lactate of 2.1 mmol/L on admission and 4.3 mmol/L two hours later, despite IV fluids. What does this suggest?

1. AWorsening tissue perfusion that needs urgent reporting
2. BImproving circulation as the fluids start to work
3. CExpected muscle activity from shivering in fever
4. DA normal response to IV fluids in the first hours

Before giving prescribed IV potassium chloride, which assessment is most important?

1. AUrine output and kidney function
2. BHearing in both ears
3. CPupil size and reaction to light
4. DSkin turgor on the forearm

A patient with no kidney problems and a normal ECG has a potassium of 6.2 mEq/L. The laboratory comments that the sample was hemolyzed. What is the best interpretation?

1. ATreat immediately with insulin and glucose without further checks
2. BThe patient has kidney failure
3. CThe result may be falsely high; assess the patient and arrange a repeat sample
4. DThe potassium is certainly normal and needs no follow-up

An aPTT result is extremely high, but the nurse learns that the sample was taken from the arm where the heparin infusion runs. What is the best action?

1. AAccept the result and halve the infusion rate
2. BRequest a new sample from the opposite arm before the dose is adjusted
3. CStop the heparin infusion permanently and inform the provider
4. DGive protamine at once to reverse the heparin