Active Vitamin D CKD G5 — ESENeph MCQ

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HardChronic Kidney DiseaseActive Vitamin D CKD G5ESENeph

A non-dialysis CKD G5 patient has phosphate 1.8 mmol/L, corrected calcium 2.10 mmol/L and PTH 25 pmol/L. Nutritional vitamin D is replete. What is the best next step?

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Correct answer: A — Address phosphate control and serial trends first

In non-dialysis CKD, a modestly raised PTH can be adaptive and treatment should be based on serial phosphate, calcium and PTH trends. Modifiable factors—particularly hyperphosphataemia, dietary phosphate and binder adherence—should be addressed first. Calcitriol or analogues are not routinely used and are generally reserved for severe, progressive hyperparathyroidism because of hypercalcaemia and phosphate risk. The competing options do not fit the renal phenotype, temporal relationship, treatment threshold or safety constraint described. Management still requires confirmation of current medicines, renal trajectory and relevant contraindications, followed by timely biochemical and clinical reassessment. Escalate urgently if life-threatening electrolyte disturbance, respiratory compromise, shock, neurological deterioration or a dialysis indication develops.

Reference: KDIGO 2024 Clinical Practice Guideline for CKD. https://kdigo.org/wp-content/uploads/2024/03/KDIGO-2024-CKD-Guideline.pdf; NICE NG203: Chronic kidney disease—assessment and management. https://www.nice.org.uk/guidance/ng203/chapter/recommendations