Hyponatremia Nursing Care Plan

Nursing Diagnosis 1: Altered Perception

Confusion related to Hyponatremia: serum Na < 135 mEq/L (mild 130–134, moderate 125–129, severe < 125) as evidenced by Serum Na < 125 mEq/L on admission; Altered level of consciousness, lethargy, slowed responses; Headache, nausea, malaise; Agitation or restlessness disproportionate to setting; Disorientation to time, place, or person.

Interventions

• Perform neurologic checks (GCS, orientation, pupils, motor exam) at intervals matched to clinical acuity and per facility protocol; commonly more frequent during active correction.
• Monitor serum Na at the frequency ordered by the provider team; report each value and the cumulative change.
• Calculate 24-hour and 48-hour cumulative Na change and report values approaching or exceeding ordered limits (commonly > 8 mEq/L in 24 h, or > 4–6 mEq/L in 24 h in ODS-high-risk patients per Verbalis 2013; > 18 mEq/L in 48 h).
• Assess for delayed signs that may reflect ODS during the 2–6 day window after correction (dysarthria, dysphagia, paraparesis, behavioral change) and report changes promptly.
• Reassess volume status (orthostatic vitals, mucous membranes, JVP, edema, urine output) at intervals matched to clinical acuity.
• Check urine output and urine specific gravity at intervals ordered by the provider team during 3% saline infusion or vaptan therapy.
• Administer 3% hypertonic saline as ordered per provider direction and facility protocol for acute severe symptoms (e.g., seizures, coma).
• If correction exceeds the rate ordered by the provider team, notify the provider immediately and prepare to administer desmopressin (DDAVP) and D₅W as ordered to relower serum Na.
• Implement the fluid plan ordered for the patient’s subtype: fluid restriction in SIADH, ordered 0.9% NaCl in hypovolemic, or restriction with ordered diuresis in hypervolemic. Confirm orders before initiating.
• Provide a quiet, well-lit room with familiar objects and frequent reorientation.
• Maintain seizure precautions per facility protocol while Na < 125 or the patient is symptomatic (padded rails, suction at bedside, IV access, airway equipment available).
• Once the patient is oriented, teach early symptoms to recognize (headache, nausea, fatigue, confusion) and the plan to contact the provider if they return.
• Educate the patient and family on the prescribed fluid limit and how to measure intake at home using a marked container.
• Review the patient’s medication list with them and flag drugs that can lower serum Na (thiazides, SSRIs, NSAIDs, carbamazepine). Instruct the patient to discuss any changes with the prescriber before stopping a medication.
• Notify the provider for a Na change approaching or exceeding ordered limits, a new neurologic deficit, a seizure, or a GCS drop ≥ 2 points.
• Coordinate consultation with nephrology or endocrinology per provider order for refractory or atypical presentations.

Outcome: Patient is alert and oriented within ordered parameters during the correction window; Serum Na trend is documented and reported within the rate limits ordered by the provider team; Resolution of headache, nausea, and lethargy is monitored and reported.

Nursing Diagnosis 2: Injury Risk (seizures/falls)

Injury Risk (seizures/falls) related to Hyponatremia: serum Na < 135 mEq/L (mild 130–134, moderate 125–129, severe < 125) as evidenced by Altered mental status that may reflect cerebral edema; Gait instability and weakness; Increased seizure risk with serum Na < 120 mEq/L; Orthostatic hypotension (in the hypovolemic subtype); Polypharmacy with sedating agents (SSRIs, opioids).

Interventions

• Apply a validated fall-risk assessment (e.g., Morse, Hendrich II) on admission and at intervals per facility protocol.
• Reassess orientation, motor strength, and gait before any out-of-bed activity.
• Monitor for seizure aura or prodromal signs (focal twitching, staring, lip-smacking) and report changes promptly.
• Check orthostatic vital signs in the hypovolemic subtype before ambulation per facility protocol.
• Initiate seizure precautions per facility protocol: padded side rails, suction at bedside, supplemental O₂ available, oral airway accessible.
• Place the bed in low position with brakes locked, use a bed alarm, and keep call light and personal items within reach.
• Coordinate 1:1 sitter or move the patient to a room within direct line of sight per facility protocol for severely confused or agitated patients.
• Use non-slip footwear and a gait belt for transfers; coordinate two-staff assist for first ambulation post-correction per facility protocol.
• Cluster cares and time medications to allow protected sleep; minimize sedating PRNs when feasible per provider order.
• Educate the patient and family to use the call light before getting out of bed, even when the patient feels well.
• Teach family how to recognize a seizure and to call for help immediately rather than attempt to restrain the patient.
• Review home environment hazards (loose rugs, low lighting, stairs) and recommend removals before discharge.
• Notify the provider for a new neurologic deficit, new agitation, or any fall; document mechanism and post-fall vitals.
• Coordinate physical therapy and occupational therapy consultation per provider order for gait assessment before discharge.

Outcome: No falls during admission; No seizure activity during admission; Patient remains in bed with call light within reach when unattended.

Nursing Diagnosis 3: Fluid Imbalance

Fluid Volume Alteration related to Hyponatremia: serum Na < 135 mEq/L (mild 130–134, moderate 125–129, severe < 125) as evidenced by Volume status varies by hyponatremia subtype (hypovolemic / euvolemic / hypervolemic); SIADH: euvolemic with concentrated urine (urine osm > 100 mOsm/kg); Heart failure or cirrhosis: hypervolemic with edema, JVD, ascites; GI losses, thiazide use, or salt-wasting: hypovolemic with orthostasis; Dilute urine (< 100 mOsm/kg) in primary polydipsia or beer potomania.

Interventions

• Assess volume status on admission and at intervals matched to clinical acuity: mucous membranes, skin turgor, JVP, lung sounds, peripheral edema, orthostatic vitals.
• Document daily weights at the same time, same scale, same garments when feasible.
• Maintain strict hourly intake and output; calculate 8-hour and 24-hour net balance.
• Monitor urine specific gravity and urine output trend per facility protocol.
• Track serial serum Na, urine Na, urine osmolality, and BUN:Cr ratio and report patterns to the provider team.
• Administer 0.9% NaCl as ordered per provider direction and facility protocol once hypovolemic subtype has been assigned by the provider team; reassess Na and volume at the intervals ordered.
• Implement ordered fluid restriction in SIADH per facility protocol; provide a visible fluid-tracking container at the bedside.
• For the hypervolemic subtype (HF, cirrhosis), implement ordered fluid restriction and administer ordered loop diuretic per facility protocol; monitor for over-diuresis.
• Do not administer 0.9% NaCl in suspected SIADH unless specifically ordered; if uncertain, clarify the order with the provider before initiating.
• During hypertonic saline or vaptan therapy, recheck serum Na at the intervals ordered by the provider team; pause the infusion and notify the provider if the rate of rise approaches the ordered ceiling (commonly 6–8 mEq/L in 24 h, or stricter in ODS-high-risk patients).
• Teach the patient to weigh themselves daily at home (same time, same scale, same garments) and to contact the provider for changes the provider has defined as concerning.
• Educate the patient on the prescribed fluid limit; explain that all liquids count (ice, soup, gelatin, IV flushes).
• Review signs of dehydration (thirst, dizziness on standing, dark urine) and signs of overload (swelling, dyspnea, sudden weight gain).
• Notify the provider for UOP < 30 mL/hr for 2 consecutive hours, aquaresis > 250 mL/hr, or weight change > 2 kg in 24 h.
• Coordinate dietitian consultation per provider order for sodium and fluid education tailored to the subtype.

Outcome: Volume status indicators are monitored and reported per facility protocol to support subtype assignment by the provider team; Daily weight trend is documented and reported in the direction appropriate to the ordered plan; Strict I&O is documented and net balance trend is reported.

Nursing Diagnosis 4: Spiritual Distress

Electrolyte Imbalance related to Hyponatremia: serum Na < 135 mEq/L (mild 130–134, moderate 125–129, severe < 125) as evidenced by Active 3% hypertonic saline infusion; Vaptan therapy (tolvaptan, conivaptan) with rapid aquaresis; Underlying SIADH with sudden suppression of ADH (e.g., after surgery, after corticosteroid initiation); Renal dysfunction that can complicate fluid management; Heart failure or cirrhosis with limited reserve.

Interventions

• Check serum Na at the intervals ordered by the provider team during 3% saline or vaptan therapy; commonly more frequent in the first 6 h and at extended intervals once stable.
• Calculate the hourly Na rise during active correction and notify the provider if the projected 24-hour change approaches the ordered ceiling.
• Track urine output hourly; a sudden aquaresis > 250 mL/hr can predict impending over-correction.
• Monitor for hypotension, tachycardia, or signs of dehydration during aquaresis or diuresis and report changes promptly.
• Coordinate with pharmacy and the provider team so that desmopressin (DDAVP) and D₅W are readily available throughout active correction per facility protocol.
• Administer 3% hypertonic saline via central venous access when available per provider order and facility protocol; if administered peripherally per provider direction, use a large-bore IV and monitor the site at intervals matched to facility protocol.
• Pause hypertonic saline or vaptan when the ordered target rise is reached (commonly 4–6 mEq/L for symptom relief in acute presentations, ≤ 8 mEq/L in 24 h overall, or stricter in ODS-high-risk patients per Verbalis 2013).
• If correction has overshot the ordered ceiling, administer DDAVP and D₅W as ordered per provider direction to relower serum Na.
• Explain to the patient and family why serum Na is corrected slowly and what symptoms to report (new weakness, slurred speech, swallowing difficulty).
• Teach family that ODS-suggestive symptoms can appear 2–6 days after correction (including after discharge) and to seek care immediately if they appear.
• Notify the provider immediately for a Na rise > 6 mEq/L in 6 h, > 8 mEq/L in 24 h, or > 18 mEq/L in 48 h, or for any change approaching the stricter ODS-high-risk ceiling.
• Coordinate transfer to a higher level of care per facility protocol when rate-of-correction control is difficult on the unit, or for any seizure or GCS ≤ 8.

Outcome: Serum Na correction stays within the rate limits ordered by the provider team (commonly ≤ 8 mEq/L per 24 h, or ≤ 4–6 per 24 h in ODS-high-risk patients per Verbalis 2013); Cumulative 48-hour change is monitored and reported within ordered limits (commonly ≤ 18 mEq/L); No symptoms suggestive of osmotic demyelination syndrome are identified during admission or the follow-up window.

Nursing Diagnosis 5: Anxiety

Anxiety related to Hyponatremia: serum Na < 135 mEq/L (mild 130–134, moderate 125–129, severe < 125) as evidenced by Patient verbalization of fear about the diagnosis, the correction process, or recurrence; Restlessness or hypervigilance disproportionate to the clinical state; Tachycardia disproportionate to clinical state; Unfamiliarity with the hospital environment, infusions, and frequent lab draws; Sleep disturbance from monitor alarms and frequent interventions.

Interventions

• Assess anxiety level using a 0–10 scale at the start of every shift and as needed.
• Identify the patient’s stated triggers (frequent lab draws, infusions, monitor alarms, fear of seizures, fear of recurrence).
• Observe for physical signs of anxiety: tachycardia out of proportion to clinical state, restlessness, hand-wringing, hypervigilance.
• Assess sleep quality and contributors (alarms, lighting, frequent interventions, anxiety) per facility protocol.
• Provide a calm, reassuring presence; speak clearly and at a measured pace.
• Explain procedures and findings in plain, patient-friendly terms before performing them.
• Cluster cares to allow uninterrupted rest periods when clinical state allows.
• Limit non-essential nighttime stimuli (overhead lights, loud conversations, unnecessary alarms) per facility protocol.
• Facilitate family presence per facility visitation policy and patient preference.
• Coordinate with chaplaincy, social work, or interpreter services per patient preference and facility policy.
• Teach diaphragmatic breathing and grounding techniques the patient can use independently.
• Educate the patient and family on the rationale for slow Na correction and the rationale for frequent lab checks.
• Teach the family what monitor alarms mean and which are routine versus concerning.
• Coordinate with chaplaincy, social work, or psych services per provider order if anxiety persists or worsens despite non-pharmacologic measures.
• Notify the provider for severe or persistent anxiety unresponsive to non-pharmacologic measures.

Outcome: Patient verbalizes decreased anxiety; Patient demonstrates at least one coping strategy (diaphragmatic breathing, grounding, music); Patient sleeps in extended blocks when clinical state allows.

Nursing Diagnosis 6: Knowledge Deficit

Knowledge Deficit related to Hyponatremia: serum Na < 135 mEq/L (mild 130–134, moderate 125–129, severe < 125) as evidenced by Patient and family unfamiliar with hyponatremia and its triggers; No prior counseling on contributing medications (thiazides, SSRIs, NSAIDs); Limited prior exposure to fluid-restriction rationale; Recurrent admissions for the same disorder; No clear plan in place for follow-up Na monitoring.

Interventions

• Assess baseline understanding of hyponatremia, the prescribed plan, and prior experience with the disorder.
• Identify learning barriers: literacy level, language, vision, hearing, cognitive recovery from confusion.
• Identify a primary support person (family member, caregiver) who can attend teaching sessions.
• Use teach-back to confirm understanding after each topic; repeat content in shorter segments if recall is incomplete.
• Provide written and pictorial materials at a 5th–6th-grade reading level per facility protocol.
• Create a personalized one-page action plan listing the fluid limit, weight-check schedule, drugs to discuss with the prescriber, and warning signs.
• Explain that sodium is the major electrolyte balancing brain water; when low, the brain can swell, producing headache, nausea, confusion, and seizures.
• Review the personal trigger identified in this admission (thiazide, SSRI, NSAID, MDMA, marathon, SIADH) and the plan to avoid recurrence.
• Teach the fluid-restriction rationale, the prescribed daily limit, and how to track intake using a marked container.
• Review contributing medications with the patient (thiazides, SSRIs, NSAIDs, carbamazepine, MDMA, proton-pump inhibitors). Instruct the patient to talk with the prescriber before stopping a prescribed medication.
• Teach the daily-weight protocol (same time, same scale, same garments) and the threshold for contacting the provider as defined by the provider team.
• Review red-flag symptoms that should prompt urgent care: severe headache, persistent vomiting, confusion, seizure, weakness, new gait disturbance.
• Coordinate discharge with a clear follow-up Na lab plan and a primary-care or nephrology appointment per provider order.
• Coordinate referral to pharmacy or primary care for a comprehensive medication reconciliation before discharge per facility protocol.

Outcome: Patient verbalizes the meaning of low serum sodium and personal triggers; Patient demonstrates correct daily-weight technique; Patient lists contributing medications and the plan to discuss them with the prescriber.

Hyponatremia is defined by plasma tonicity, not the serum Na value alone. The provider team first separates pseudo-hyponatremia (hyperglycemia, hyperlipidemia, paraproteinemia) and iso- or hypertonic states from true hypotonic hyponatremia. Hypotonic hyponatremia is then classified by volume status. Hypovolemic: renal losses (thiazides, salt-wasting nephropathy, mineralocorticoid deficiency) or extra-renal losses (GI losses, third-spacing, burns). Euvolemic: SIADH is the most common cause (paraneoplastic — small-cell lung; CNS lesions; drugs — SSRIs, carbamazepine, NSAIDs; pulmonary disease), with hypothyroidism, glucocorticoid deficiency, and primary polydipsia as additional differentials. Hypervolemic: heart failure, cirrhosis, nephrotic syndrome — total body water excess greater than total body Na excess. Symptom severity correlates with the rate of fall and magnitude; chronic hyponatremia (> 48 h) is relatively well tolerated due to brain adaptation, while acute hyponatremia (< 48 h) can produce cerebral edema, seizures, and herniation. Per the 2014 European and 2013 American Expert Panel guidelines, correction follows strict rate limits: chronic ≤ 8 mEq/L in 24 h overall (goal 4–8 mEq/L), with a stricter ≤ 4–6 mEq/L in 24 h in ODS-high-risk patients (Na ≤ 105, hypokalemia, malnutrition, alcoholism, advanced liver disease) per Verbalis 2013, to reduce the risk of osmotic demyelination syndrome (ODS). Acute symptomatic patients may correct faster initially using 3% saline boluses per provider order and facility protocol, with symptom relief — not normalization — as the goal.

• Severe Na threshold: < 125 mEq/L
• Correction rate (chronic): ≤ 8 mEq/L/24 h (or ≤ 4–6 if ODS risk)
• Acute symptomatic: 3% saline 100 mL bolus per provider order
• SIADH urine osm: > 100 mOsm/kg + euvolemic
• Fluid restriction: 800–1500 mL/day (chronic SIADH)

• Makic, M. B. F., & Martinez-Kratz, M. R. (Eds.). (2023). Ackley and Ladwig’s Nursing Diagnosis Handbook: An Evidence-Based Guide to Planning Care (13th ed.). Elsevier.
• Spasovski, G., Vanholder, R., Allolio, B., et al. (2014). Clinical practice guideline on diagnosis and treatment of hyponatraemia. European Journal of Endocrinology, 170(3), G1–G47.
• Verbalis, J. G., Goldsmith, S. R., Greenberg, A., et al. (2013). Diagnosis, evaluation, and treatment of hyponatremia: expert panel recommendations. American Journal of Medicine, 126(10 Suppl 1), S1–S42.