What is the formula for calculating the renal clearance?
Clearance = urine flow rate x urine concentration / plasma concentration.
Clearance = urine flow rate x plasma concentration / urine concentration.
Clearance = plasma flow rate x urine concentration / plasma concentration.
Clearance = plasma flow rate x plasma concentration / urine concentration.
The Correct Answer is A
Clearance = urine flow rate x urine concentration / plasma concentration. This is the formula for calculating the renal clearance of a substance that is neither reabsorbed nor secreted by the tubules. Renal clearance is the volume of plasma that would have to be filtered by the glomeruli each minute to account for the amount of that substance appearing in the urine each minute.
Choice B is wrong because it has the urine concentration and plasma concentration inverted.
This would give an incorrect value for renal clearance.
Choice C is wrong because it has the plasma flow rate instead of the urine flow rate.
Plasma flow rate is not directly related to renal clearance.
Choice D is wrong because it has both the plasma flow rate and the urine concentration and plasma concentration inverted.
This would give an incorrect value for renal clearance.
Normal ranges for renal clearance vary depending on the substance, age, sex, and body size.
For example, the normal range for creatinine clearance is 85-125 mL/min for males and 75-115 mL/min for females.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","D"]
Explanation
Furosemide is a loop diuretic that causes the kidneys to excrete more water and salt, which can lead to dehydration and electrolyte imbalance.
Electrolyte imbalance can cause muscle cramps, numbness and tingling, weakness and fatigue, and other symptoms.
Therefore, the client should monitor for these signs and report them to the doctor if they occur.
Choice B is wrong because dry mouth is not a sign of electrolyte imbalance, but rather a sign of dehydration.
Dehydration can also cause thirst, decreased urination, drowsiness, and confusion.
Choice E is wrong because tachycardia is not a sign of electrolyte imbalance, but rather a sign of hypovolemia (low blood volume) or hypotension (low blood pressure).
Furosemide can lower blood pressure by reducing fluid volume in the body.
Therefore, the client should also monitor their blood pressure and pulse regularly while taking furosemide.
Correct Answer is B
Explanation
This is a priority nursing intervention for a client with acute kidney injury (AKI) because it helps to assess the renal function and fluid status of the client. Urine output is also an indicator of the response to treatment and the need for further interventions.
Choice A is wrong because pain medication is not a priority intervention for AKI unless the client has other conditions that cause pain.
Pain medication may also have adverse effects on the kidney function and should be used with caution.
Choice C is wrong because ambulation is not a priority intervention for AKI and may not be appropriate for a client who is fluid overloaded or hypotensive.
Ambulation may also increase the risk of falls and injury in a client who is confused or fatigued.
Choice D is wrong because assisting with meals is not a priority intervention for AKI and may not be necessary for a client who has adequate oral intake.
A client with AKI may also have dietary restrictions such as low protein, low potassium, low sodium, and low phosphorus, which should be considered when providing meals.
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