Critical Care Nursing NCLEX Questions Related

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Identify which substances in the glomerular filtrate would indicate a problem with renal function. (Select all that apply.)

  • A. Protein
  • B. Sodium
  • C. Creatinine
  • D. Red blood cells
Correct Answer: A

Rationale: The presence of protein in the glomerular filtrate indicates a problem with renal function because in healthy kidneys, proteins are retained in the blood and not filtered into the urine. If protein is found in the filtrate, it suggests damage to the glomerular filtration barrier. Sodium, creatinine, and red blood cells are normally present in the filtrate and are not indicative of renal dysfunction. Sodium is freely filtered and reabsorbed, creatinine is a waste product of muscle metabolism excreted by the kidneys, and a small number of red blood cells may be filtered due to their small size. Therefore, protein in the glomerular filtrate is the most specific indicator of renal dysfunction.