A nurse is reviewing the laboratory data of a client following a hemodialysis treatment. The nurse should expect to find a decrease in which of the following laboratory values?

Choice a) is incorrect because calcium levels are not directly affected by hemodialysis. Calcium is a mineral that is important for bone health, blood clotting, and muscle contraction. Hemodialysis does not remove calcium from the blood, but it may cause low calcium levels if the dialysate fluid has a lower concentration of calcium than the blood.

Choice b) is correct because potassium levels are decreased by hemodialysis. Potassium is an electrolyte that is essential for nerve and muscle function, especially the heart. Hemodialysis removes excess potassium from the blood, which can build up in people with kidney failure and cause irregular heartbeats, muscle weakness, or even cardiac arrest.

Choice c) is incorrect because protein levels are not decreased by hemodialysis. Protein is a macromolecule that is composed of amino acids and performs various functions in the body, such as building and repairing tissues, transporting substances, and regulating processes. Hemodialysis does not remove protein from the blood, but it may cause low protein levels if the client has a poor diet or loses protein through other means, such as urine or wounds.

Choice d) is incorrect because RBC count is not decreased by hemodialysis. RBCs are red blood cells that carry oxygen throughout the body. Hemodialysis does not remove RBCs from the blood, but it may cause low RBC count if the client has anemia, which is a common complication of kidney failure. Anemia can be caused by reduced production of erythropoietin (a hormone that stimulates RBC production), iron deficiency, or blood loss.

The correct answer is D. Blood pressure 115/68 mm Hg.

Choice A reason: Heart rate 180/min is incorrect because, although an increased heart rate is a compensatory mechanism, a rate of 180/min is excessively high and suggests a more severe stage of shock or other cardiac issues.

Choice B reason: Mottled skin is incorrect as it indicates poor perfusion seen in decompensated shock, where organ dysfunction begins to manifest, not in the compensatory stage.

Choice C reason: Hypokalemia, or low potassium levels, is incorrect because electrolyte imbalances are not typically a finding in the compensatory stage of shock. Normal potassium levels range from 3.5 to 5.0 mEq/L.

Choice D reason: Blood pressure 115/68 mm Hg is correct because it falls within the normal blood pressure range, which the body strives to maintain during the compensatory stage of shock through various mechanisms.