CKD Patient with Hyperphosphatemia and Calciphylaxis: Nutrition and Medication Management
Mr. K, a 60-year-old man with stage 5 chronic kidney disease (CKD) on hemodialysis for 4 years, presents with painful skin lesions on his lower extremities. His serum phosphorus is 7.8 mg/dL, calcium 9.2 mg/dL, and intact PTH 800 pg/mL. He is prescribed sevelamer carbonate 800 mg three times daily with meals and calcitriol 0.25 mcg daily. His diet recall reveals frequent consumption of cheese, processed meats, and cola drinks. He reports that he often forgets to take his phosphate binders because he eats meals at irregular times. The nurse must address his hyperphosphatemia and provide education to prevent complications such as calciphylaxis.
1. What are the priority nursing diagnoses and interventions for this patient?
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Priority nursing diagnoses: 1) Risk for impaired skin integrity related to calciphylaxis; 2) Excess fluid volume and electrolyte imbalance related to hyperphosphatemia; 3) Non-adherence to therapeutic regimen related to forgetfulness and irregular meals. Interventions: 1) Assess skin lesions for signs of infection, provide wound care as prescribed, and manage pain. 2) Administer phosphate binders with meals as prescribed; reinforce that they must be taken with food to be effective. 3) Collaborate with the dietitian to develop a renal diet low in phosphorus (e.g., limit dairy, processed foods, colas) and provide a list of phosphorus-containing foods. 4) Educate on the importance of consistent meal times and taking binders with each meal or snack. 5) Monitor serum phosphorus, calcium, and PTH levels. 6) Administer calcitriol as prescribed, but monitor for hypercalcemia. 7) Teach the patient about the risks of calciphylaxis (e.g., skin necrosis, infection) and the need for prompt reporting of new lesions. 8) Use teach-back to ensure understanding. 9) Consider referral to a social worker or pharmacist for medication management support.
2. How should the nurse evaluate the effectiveness of the interventions and adjust the plan?
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Effectiveness is evaluated by: 1) Monitoring serum phosphorus levels; target for dialysis patients is 3.5-5.5 mg/dL. 2) Assessing adherence by pill counts, patient report, and pharmacy refill records. 3) Evaluating the healing of skin lesions and absence of new lesions. 4) Reviewing dietary intake with the dietitian to ensure compliance. 5) Monitoring for side effects of phosphate binders (e.g., gastrointestinal intolerance) and calcitriol (hypercalcemia). If phosphorus remains elevated, the nurse should collaborate with the nephrologist to adjust the binder dose or type (e.g., switch to calcium acetate or add a combination), reinforce education, and consider simplifying the medication regimen. The nurse should also assess for barriers to adherence (e.g., cost, forgetfulness) and address them. Ongoing education and support are essential to prevent calciphylaxis and other complications.