Canadian Practical Nurse Registration Examination (CPNRE) Practice Exam

The presence of thirst is a primary symptom of hypernatremia, which refers to higher than normal sodium levels in the blood. This condition typically occurs when there's a deficit of water in the body relative to sodium, prompting the brain to signal a sensation of thirst. This mechanism serves as a critical response to encourage fluid intake to restore balance and dilute the excess sodium.

While other symptoms, such as confusion or restlessness, can also accompany hypernatremia, thirst is the most directly connected to the body's compensatory mechanism to address fluid imbalance. Frequently, patients with hypernatremia will experience increased thirst due to their body's need to correct dehydration and adjust sodium levels effectively. This physiological response is crucial for nurses to monitor in patients at risk for electrolyte imbalances.