Metabolic Alkalosis Nursing Care Plan
High pH and bicarbonate from vomiting, suction or diuretics; replace chloride and potassium.
Quick answer
A Metabolic Alkalosis nursing care plan centers on stop or reduce ongoing acid loss; restore volume, chloride and potassium; monitor for arrhythmias and neuromuscular irritability. Priority nursing diagnoses are Risk for electrolyte imbalance, Deficient fluid volume, Risk for injury. The plan below gives assessment cues, measurable goals, 3 intervention sets with rationales, and patient teaching.
Overview
Metabolic alkalosis is a primary rise in serum bicarbonate producing a pH above 7.45. The usual mechanisms are loss of hydrogen ion — through vomiting, nasogastric suction or diuretics — or gain of bicarbonate from antacid overuse, massive transfusion or bicarbonate administration.
It is nearly always accompanied by hypokalemia and hypochloremia, because the kidney exchanges potassium for hydrogen to preserve acid. Alkalosis also increases neuromuscular irritability and lowers ionized calcium, producing tetany-like symptoms, and shifts the oxyhemoglobin curve so tissues release less oxygen.
Nursing care corrects volume, chloride and potassium deficits, stops the ongoing acid loss, and monitors for arrhythmias and respiratory depression as the lungs compensate by hypoventilating.
Key numbers to know
Values
pH above 7.45 with bicarbonate above 26 mEq/L; compensatory PaCO2 rises.
Chloride-responsive
Vomiting, NG suction and diuretic causes correct with normal saline plus potassium chloride.
Hypokalemia link
Alkalosis drives potassium into cells; expect and replace low potassium.
Tetany
Reduced ionized calcium causes tingling, cramps and positive Chvostek and Trousseau signs.
Nursing priorities
- Stop or reduce ongoing acid loss.
- Restore volume, chloride and potassium.
- Monitor for arrhythmias and neuromuscular irritability.
- Support respiratory status during compensatory hypoventilation.
- Prevent injury from confusion, tetany or seizures.
Nursing assessment
Subjective data
- Reports of tingling in fingers, toes or around the mouth
- Complaints of muscle cramps, weakness or dizziness
- History of vomiting, nasogastric suction, diuretic or antacid use
- Reports of confusion or irritability
Objective data
- ABG: pH above 7.45, HCO3 above 26, rising PaCO2
- Hypokalemia, hypochloremia, low ionized calcium
- Slow shallow respirations as compensation
- Hyperactive reflexes, tremor, positive Chvostek and Trousseau signs
- ECG changes: flattened T waves, U waves, ectopy
Related factors
- Prolonged vomiting or gastric suctioning
- Loop or thiazide diuretic therapy
- Excessive bicarbonate or antacid intake
- Hypokalemia and volume depletion
- Corticosteroid excess or hyperaldosteronism
Key nursing diagnoses
Goals and expected outcomes
- The client's pH and bicarbonate will return toward normal.
- The client will maintain potassium, chloride and calcium within normal limits.
- The client will maintain effective ventilation and oxygenation.
- The client will remain free from injury, tetany and arrhythmia.
Nursing interventions and rationales
Monitor
- Follow serial ABGs and electrolytes, especially potassium and chloride.
- Maintain cardiac monitoring and report ectopy or U waves.
- Assess respiratory rate and depth and oxygen saturation for hypoventilation.
- Check for tetany signs and neurologic changes each shift.
Correct the cause
- Administer normal saline with potassium chloride as ordered for chloride-responsive alkalosis.
- Use low intermittent NG suction, irrigate with normal saline rather than water, and give antiemetics.
- Review and adjust diuretics and antacids with the provider.
- Give acetazolamide or other agents as prescribed for refractory cases.
Protect the patient
- Institute seizure and fall precautions; keep the bed low and call light close.
- Reorient frequently and provide a calm environment.
- Record strict intake and output and daily weight.
- Encourage chloride- and potassium-rich foods when oral intake resumes.
Patient and family teaching
- Explain the risk of overusing antacids and baking soda remedies.
- Teach oral rehydration and when to seek care for prolonged vomiting.
- Review potassium-rich foods for patients on diuretics.
- Advise reporting muscle cramps, numbness or palpitations.
How to build this plan
- 1Assess the patient. Collect subjective and objective data through interview, physical assessment, labs and chart review. Complete, accurate data is the foundation of every later step.
- 2Analyze and cluster the data. Group related cues, compare them with normal findings, and identify patterns that point to actual or potential problems.
- 3Formulate nursing diagnoses. Write the problem statement using a recognized diagnostic label plus related factors and evidence (problem related to cause as evidenced by signs).
- 4Set priorities. Rank diagnoses as high, medium or low using ABCs, Maslow's hierarchy and the patient's own stated priorities. Life-threatening problems come first.
- 5Establish goals and outcomes. Write SMART, patient-centered outcomes: specific, measurable, attainable, realistic and time-bound (short-term and long-term).
- 6Select nursing interventions. Choose independent, dependent and collaborative actions that are safe, evidence-based and matched to the outcome.
- 7Provide rationales. State the scientific reason each intervention works. Rationales are what turn a task list into clinical reasoning.
- 8Evaluate the plan. Compare the patient's actual response with the expected outcome: met, partially met or not met — then continue, revise or discontinue.
- 9Document and communicate. Record the plan and the patient's response in the health record so the whole team works from the same information.
Summarized for study use. Always follow your school's or facility's approved care plan format and current clinical policy.
Practice Metabolic Alkalosis questions
These concepts are tested on the ATI proctored exams below — every set has answers and rationales.
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Common questions
What are the nursing diagnoses for Metabolic Alkalosis?
Priority nursing diagnoses for Metabolic Alkalosis: Risk for electrolyte imbalance; Deficient fluid volume; Risk for injury.
What are the nursing interventions for Metabolic Alkalosis?
Follow serial ABGs and electrolytes, especially potassium and chloride. Maintain cardiac monitoring and report ectopy or U waves. Assess respiratory rate and depth and oxygen saturation for hypoventilation. Check for tetany signs and neurologic changes each shift. Administer normal saline with potassium chloride as ordered for chloride-responsive alkalosis. Use low intermittent NG suction, irrigate with normal saline rather than water, and give antiemetics.
What are the nursing care goals for Metabolic Alkalosis?
The client's pH and bicarbonate will return toward normal. The client will maintain potassium, chloride and calcium within normal limits. The client will maintain effective ventilation and oxygenation. The client will remain free from injury, tetany and arrhythmia.
What should you assess in a patient with Metabolic Alkalosis?
Reports of tingling in fingers, toes or around the mouth; Complaints of muscle cramps, weakness or dizziness; History of vomiting, nasogastric suction, diuretic or antacid use; Reports of confusion or irritability; ABG: pH above 7.45, HCO3 above 26, rising PaCO2; Hypokalemia, hypochloremia, low ionized calcium; Slow shallow respirations as compensation; Hyperactive reflexes, tremor, positive Chvostek and Trousseau signs; ECG changes: flattened T waves, U waves, ectopy