A client exhibits tingling in the extremities and tetany. Which electrolyte abnormality should the nurse check for?

Tingling in the extremities and tetany are classic signs associated with neuromuscular excitability, which is often linked to low levels of calcium in the blood, a condition known as hypocalcemia. Calcium plays a critical role in many physiological processes, including the regulation of neuromuscular function and the excitation of nerve impulses. When calcium levels drop, the increased excitability of neurons can lead to symptoms like tingling (paresthesia) and muscle cramps or spasms (tetany).

In this context, hypocalcemia causes heightened nerve conductivity, resulting in the tingling sensation and muscle contractions seen in tetany. Therefore, it is vital for the nurse to assess calcium levels in clients presenting with these symptoms to accurately identify and treat the underlying electrolyte imbalance.

While the other options represent different electrolyte imbalances, they are not typically associated with the specific combination of tingling and tetany. Hyperkalemia (high potassium) often presents with weakness and changes in cardiac function rather than these neurological symptoms. Hypernatremia (high sodium) and hyponatremia (low sodium) may lead to neurological changes, but not specifically the muscle cramping and tingling characteristic of hypocalcemia. Thus, assessing for hyp