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
Explanation
Acute renal injury (ARI) is a term for a reversible syndrome that results in decreased glomerular filtration rate (GFR) and oliguria. GFR is a measure of how well the kidneys filter blood and oliguria is a condition of producing less than normal amounts of urine.
Choice B is wrong because chronic renal injury (CRI) is not a reversible syndrome, but a progressive loss of kidney function over months or years.
Choice C is wrong because end-stage renal disease (ESRD) is not a reversible syndrome, but a condition where the kidneys have lost most or all of their function and dialysis or transplantation is required.
Choice D is wrong because acute tubular necrosis (ATN) is not a term for a syndrome, but a specific type of acute kidney injury that involves damage to the tubules, the part of the nephron that reabsorbs water and solutes from the filtrate.
Correct Answer is ["23"]
Explanation
The correct answer is 22.5 mL.
To find the amount of mL, use the formula: (desired dose / available dose) x available volume.
In this case, desired dose = 30 mEq, available dose = 20 mEq, and available volume = 15 mL.
Plug these values into the formula: (30 mEq / 20 mEq) x 15 mL = 22.5 mL.
However, since the instructions say to round to the nearest whole number for adult clients, the final answer is 23 mL.
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