A nurse on the medical-surgical unit is caring for a client with severe hyponatremia (serum sodium 118 mEq/L). The client is experiencing confusion, muscle weakness, and nausea. Which nursing intervention should be the priority?

Priority nursing intervention for severe hyponatremia with neurological symptoms is monitoring neurological status and seizure precautions due to risk of cerebral edema and seizures. Other options like hypertonic saline require careful monitoring and are not the initial independent nursing action.

Core Nursing Explanation Key Concept Analysis: This question assesses the priority nursing intervention for a patient with Severe hyponatremia (serum sodium 118 mEq/L) presenting with neurological symptoms. Hyponatremia is defined as a serum sodium level below 135 mEq/L. Severe hyponatremia (< 120 mEq/L) causes a shift of water into brain cells due to osmotic pressure, leading to cerebral edema. The symptoms of confusion, muscle weakness, and nausea are direct manifestations of this cerebral swelling and increased intracranial pressure. The most critical risk is the progression to seizures, coma, and potentially fatal brain herniation.

Answer Rationale: Key Point! The priority is always patient safety and preventing the most immediate, life-threatening complication. In this scenario, the imminent danger is neurological deterioration leading to seizures. Therefore, the independent nursing action of "Monitor neurological status every 15 minutes and implement seizure precautions" is the highest priority. This involves frequent checks of level of consciousness (LOC) using tools like the Glasgow Coma Scale (GCS), pupillary response, and motor function, while ensuring a safe environment (padded side rails, suction equipment ready).

Distractor Analysis:
Watch out for confusion! Option ①: Administering 3% hypertonic saline is a correct medical treatment for severe symptomatic hyponatremia. However, it is not the nurse's independent priority action. It is a high-risk intervention that requires a physician's order and must be administered in a closely monitored setting (often ICU). The nurse's priority before and during this therapy is the neurological monitoring outlined in the correct answer.
Option ③: Encouraging oral fluids is contraindicated. It would dilute serum sodium further, worsening the hyponatremia and cerebral edema. Fluid restriction is typically a key intervention for hyponatremia.
Option ④: Restricting dietary sodium is incorrect for treating existing severe hyponatremia. While it might be indicated for conditions like heart failure, in this acute, symptomatic state, the problem is not excess sodium intake but an excess of water relative to sodium. The immediate need is to raise serum sodium levels cautiously, not restrict sodium further.

Related Concepts: The nursing process dictates that assessment and prevention of harm come before implementation of specific treatments. This question tests the ability to differentiate between a dependent nursing action (carrying out a medication order) and an independent, priority nursing action (continuous assessment and safety measures). It also tests understanding of the pathophysiology linking severe electrolyte imbalance to its most dangerous clinical consequences. Concept Summary

Concept	Key Points
Hyponatremia	Serum Na+ < 135 mEq/L. Causes: SIADH, heart failure, diuretics, excessive water intake.
Severe Symptoms	Neurological: Confusion, lethargy, seizures, coma. Muscular: Weakness, cramps. GI: Nausea.
Pathophysiology	Low extracellular osmolality -> water moves into cells -> cerebral edema.
Priority Nursing Action	Neurological monitoring & seizure precautions to ensure patient safety.
Medical Treatment	3% Hypertonic Saline (cautious IV), fluid restriction, treat underlying cause.

Side-by-Side Comparison!

Electrolyte Imbalance	Key Neurological Symptom	Priority Nursing Concern
Severe Hyponatremia (Na+ < 120)	Cerebral edema -> Confusion, Seizures	Seizure precautions, Neuro checks
Severe Hypernatremia (Na+ > 160)	Cellular dehydration -> Irritability, Seizures	Neurological monitoring, Slow fluid replacement
Hypocalcemia (Ca2+ low)	Neuromuscular irritability -> Tetany, Seizures	Airway protection (laryngospasm), Seizure precautions
Hypercalcemia (Ca2+ high)	Depressed CNS -> Lethargy, Coma	Cardiac monitoring (dysrhythmias), Safety for falls

Anatomy, Physiology & Pharmacology Points Physiology: Sodium is the primary cation in extracellular fluid and the main determinant of extracellular osmolality. The blood-brain barrier is permeable to water but not to ions. When serum osmolality falls, water moves down its concentration gradient into brain cells, causing swelling.
Pharmacology - 3% Hypertonic Saline: A high-alert medication. It rapidly increases extracellular osmolality, pulling water out of brain cells. Danger: Osmotic demyelination syndrome (ODS) (formerly central pontine myelinolysis) can occur if correction is too rapid (>10-12 mEq/L in 24 hours). Correction guidelines: Aim for a rise of 4-6 mEq/L in the first 24 hours, not exceeding 8 mEq/L. Memory Tips Mnemonic for Hyponatremia Symptoms: "SLUGGISH" - Seizures, Lethargy, Unsteady gait, GI upset (N/V), Headache, Impaired cognition, Shallow respirations, Headache.
Priority Rule: "Brain before vein." When neurological symptoms are present with an electrolyte imbalance, protecting the brain (monitoring, seizure precautions) is the nurse's immediate priority, even before administering the ordered corrective treatment. High-Frequency NCLEX Topics This is a classic High Yield NCLEX question testing: 1. Prioritization (Maslow's Hierarchy): Safety/neurological stability is a higher priority than administering a specific treatment. 2. Electrolyte Imbalances: Knowing the S/S and lethal complications of common imbalances. 3. Nursing Process: Assessment (neurological checks) comes before Implementation (giving a drug). 4. Pharmacology Safety: Recognizing high-risk IV therapies that require intense monitoring. Watch Out for Question Variations! * Variation 1: "The nurse is preparing to administer 3% hypertonic saline to a client with severe hyponatremia. Which action is most important?" -> Answer: Monitor serum sodium levels frequently (every 1-2 hours initially) and assess neurological status continuously to prevent over-correction. * Variation 2: "A client with SIADH (Syndrome of Inappropriate Antidiuretic Hormone) has a serum sodium of 125 mEq/L and is confused. Which order should the nurse implement first?" -> Answer: Restrict fluid intake to 800-1000 mL/day (treats the cause). But if symptoms were "seizing," the priority would shift back to seizure precautions. * Variation 3: "Which finding in a client receiving 3% saline for hyponatremia indicates a complication of therapy?" -> Answer: New-onset dysphagia, dysarthria, or flaccid paralysis (symptoms of Osmotic Demyelination Syndrome).

Nursing Clinical Practice Guide Clinical Scenario: You are the nurse on a med-surg floor. Mr. Johnson, 68, was admitted with nausea and weakness. His lab results show Na+ 118 mEq/L. He is increasingly confused, doesn't recognize his wife, and is trying to get out of bed. His IV is infusing D5W at 75 mL/hr (an inappropriate fluid for hyponatremia).

Nursing Intervention Strategy: 1. Immediate Safety & Assessment: Stay with the patient. Call for assistance. Gently reorient him. Place the bed in the lowest position with all side rails up (padded if available). Perform a focused neurological assessment: LOC (AVPU or GCS), pupil check, grip strength, facial symmetry. This is your priority independent action. 2. Notify & Collaborate: Immediately notify the physician/NP of the critical lab value and change in neurological status. Anticipate orders for stat repeat sodium, discontinuation of D5W, possible 3% saline, and transfer to a higher level of care (e.g., step-down unit). 3. Implement Precautions: Set up suction at bedside. Ensure an oral airway is available. Document baseline neuro status and initiate q15min checks as ordered or per protocol. 4. Manage Treatment: If 3% saline is ordered, obtain an infusion pump. Label the line clearly "Hypertonic Saline - High Risk." Double-check the rate with another nurse. You understand that your primary role during this infusion is relentless monitoring, not just hanging the bag.

Patient Safety and Precautions: * Key Point! Never encourage fluid intake in a hyponatremic patient unless specifically ordered (e.g., in hypovolemic hyponatremia with volume depletion). * Contraindication: Do not administer loop diuretics (like furosemide) without specific orders, as they can worsen sodium loss in some cases. * Monitoring: The greatest danger during treatment is over-correction. Monitor for a too-rapid rise in serum Na+, which risks causing permanent brain damage from ODS. Nursing Procedure & Medication Flow Procedure for Neurological Checks (q15min): 1. Stimulate patient: "Mr. Johnson, open your eyes." (Eye opening) 2. Ask a simple question: "What is your name?" (Verbal response) 3. Give a command: "Squeeze my fingers." (Motor response) 4. Check pupils: Size, equality, reaction to light. 5. Assess for subtle signs: Twitching of face or extremities (pre-seizure activity).
Medication: 3% Hypertonic Saline Administration: * Route: IV infusion via central line preferred (vesicant; can cause tissue necrosis if it infiltrates). * Rate: Typically very slow (e.g., 20-50 mL/hr). Never bolus. Use an infusion pump. * Nursing Responsibility: Check serum sodium levels every 1-2 hours initially. Calculate the correction rate. If the rise is too fast, slow or pause the infusion and notify the provider immediately. A Word from Your Senior Nurse "Remember, in situations like severe hyponatremia, you are the eyes and ears for the entire team. That confused, restless patient isn't just 'being difficult'—their brain is literally swelling. Your vigilant neuro checks are what will catch a seizure before it happens or identify the earliest sign of improvement. Passing meds is important, but protecting your patient's brain function is paramount. On the NCLEX and in real life, always ask yourself: 'What is the biggest, most immediate threat to this patient's life or well-being?' Your answer will almost always lead you to the correct priority."