Chronic Kidney Disease nursing care: what to assess and what to do first

The clinical picture

Chronic kidney disease is a progressive loss of nephron function measured by estimated GFR and staged from 1 to 5, with stage 5 marking end-stage disease and the need for renal replacement therapy. The kidneys lose the ability to excrete potassium and phosphate, activate vitamin D, produce erythropoietin and regulate fluid balance, and the clinical picture reflects all four failures at once.

Patients present with fatigue and pallor from anaemia, oedema and shortness of breath from fluid retention, pruritus and bone pain from mineral imbalance, and uraemic symptoms such as nausea, anorexia and confusion as the disease advances. Hypertension is both a cause and a consequence, and it accelerates further nephron loss if left uncontrolled. Diabetes and hypertension remain the two leading causes in most populations, so the history usually points to the diagnosis before the labs confirm it.

Assessment: what to look for and in what order

Assess potassium first. Check the most recent serum potassium, review the ECG for peaked T waves, widened QRS or a flattened P wave, and ask about muscle weakness or palpitations. A potassium above 6.0 mmol/L with ECG changes is a medical emergency and takes priority over every other finding on this list.

Assess phosphate and calcium second. High phosphate drives secondary hyperparathyroidism, vascular calcification and renal osteodystrophy over months to years, so it is dangerous but rarely acutely fatal, which is why it sits below potassium. Review the phosphate, calcium and parathyroid hormone trend rather than a single value.

Assess fluid status third. Daily weight is the single most sensitive measure, backed up by intake and output, lung sounds, jugular venous distension, peripheral oedema and blood pressure. Fluid overload kills more slowly than hyperkalaemia but faster than phosphate imbalance, which is why it closes out the priority order rather than opening it.

Immediate interventions

For severe hyperkalaemia, anticipate calcium gluconate to stabilise the cardiac membrane, followed by insulin with dextrose and a beta-agonist nebuliser to shift potassium intracellularly, and a potassium binder or dialysis to remove it from the body. Calcium gluconate does not lower potassium; it buys time by protecting the heart while the other measures act.

For fluid overload, hold or question scheduled IV fluids, elevate the head of the bed, apply oxygen as needed and prepare for diuretics if the patient still has some residual renal function, or urgent dialysis if they do not. Restrict free water and sodium per the prescribed fluid allowance and document intake against it hourly during an acute episode.

Phosphate rarely needs an immediate intervention on its own; the priority action is reviewing whether a phosphate binder is being taken with meals, since a missed or mistimed dose is the most common preventable cause of a rising level.

Ongoing nursing management

Trend labs at each contact: potassium, phosphate, calcium, bicarbonate, haemoglobin and creatinine or eGFR. A single value tells you less than the direction it is moving, particularly for phosphate and eGFR, which change slowly.

Monitor blood pressure closely, since tight control slows progression more reliably than almost any other single intervention. Review the medication list for nephrotoxic agents such as NSAIDs and for drugs needing dose adjustment as GFR falls, including many antibiotics and opioids.

Coordinate anaemia management with erythropoiesis-stimulating agents and iron studies, and monitor for the metabolic acidosis that develops as the kidneys lose their ability to excrete hydrogen ions. Vascular access planning, when dialysis is anticipated, should start well before it is needed so an AV fistula has time to mature.

Patient and family education

Teach the diet in the same order you assess: potassium first, phosphate second, fluid third. Potassium teaching means identifying high-potassium foods such as bananas, oranges, potatoes and tomatoes, and explaining leaching techniques for vegetables where appropriate.

Phosphate teaching means naming the foods highest in phosphate, dairy, processed meats, cola and packaged foods with phosphate additives, and reinforcing that binders must be taken with the first bite of a meal, not before or after, or they will not work.

Fluid teaching means translating a prescribed daily allowance into concrete terms the patient can use, ice chips, small cups, and tracking intake against the limit rather than trusting thirst. Reinforce medication adherence, the signs of hyperkalaemia and fluid overload that should prompt a call to the clinic, and the importance of attending every scheduled lab draw, since silent deterioration is the norm in CKD.

How this appears on the NCLEX

NCLEX items on CKD nearly always test prioritisation using this same hierarchy. A question presenting a patient with peaked T waves and a potassium of 6.8 mmol/L is testing whether you recognise a cardiac emergency over a patient with a phosphate of 6.5 mg/dL, even though both are abnormal.

Expect diet teaching questions that ask you to select the food the patient should avoid, and expect the correct answer to track potassium and phosphate content rather than calories or fat. Select-all-that-apply items often test recognition of fluid overload signs together, weight gain, crackles, oedema and rising blood pressure, as a single cluster rather than isolated findings.

Medication questions frequently pair a phosphate binder with meal timing, or ask you to identify a nephrotoxic drug that should be questioned in a patient with declining renal function. Read every CKD stem for the most acutely dangerous finding first; the test rewards the same triage order this page has used throughout.