A nurse is checking the laboratory results of a client who is at risk for diabetes mellitus. Which of the following laboratory results indicates to the nurse that the client is at risk for diabetes mellitus?

Choice A rationale
Metabolic acidosis is incorrect. Metabolic acidosis is characterized by a low pH and low HCO₃ levels. In this case, the HCO₃ level is normal, which rules out metabolic acidosis.
Choice B rationale

Metabolic alkalosis is incorrect. Metabolic alkalosis is characterized by a high pH and high HCO₃ levels. In this case, the pH is low, and the HCO₃ level is normal, which rules out metabolic alkalosis.
Choice C rationale
Respiratory acidosis is correct. Respiratory acidosis is characterized by a low pH and high PaCO₂ levels. In this case, the pH is 7.24 (low), and the PaCO₂ is 53 (high), indicating respiratory acidosis. This condition occurs when there is an accumulation of CO₂ in the blood due to inadequate ventilation.
Choice D rationale
Respiratory alkalosis is incorrect. Respiratory alkalosis is characterized by a high pH and low PaCO₂ levels. In this case, the pH is low, and the PaCO₂ is high, which rules out respiratory alkalosis.

Choice A rationale
Using several different scales to obtain the weight is incorrect. Consistency is key when monitoring weight, especially for clients with chronic kidney disease. Using the same scale ensures that weight measurements are accurate and comparable over time. Different scales may have slight variations, leading to inconsistent and unreliable data.
Choice B rationale
Weighing at the same time each day is correct. It is important to weigh at the same time each day, preferably in the morning after voiding and before eating, to obtain consistent and accurate measurements. This helps in monitoring fluid retention and changes in body weight, which are critical for managing chronic kidney disease.
Choice C rationale
Calibrating weight scales every week is not necessary. While it is important to ensure that the scale is accurate, weekly calibration is excessive. Regular calibration according to the manufacturer’s instructions or as needed is sufficient to maintain accuracy. Over-calibration can be time-consuming and may not significantly improve measurement accuracy.
Choice D rationale
Measuring weight just prior to voiding is incorrect. Weighing after voiding provides a more accurate measurement of body weight without the influence of bladder contents. This is especially important for clients with chronic kidney disease, as fluid balance and retention are closely monitored.