Complication of ckd

Clinical answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 23 January 2026Updated: 23 January 2026 Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

Chronic kidney disease (CKD) is associated with multiple potential complications affecting various organ systems and overall health. The key complications include:

  • Progression to end-stage renal disease (ESRD): CKD can progress to kidney failure classified as GFR category G5 (<15 ml/min/1.73 m2), necessitating renal replacement therapy such as dialysis or kidney transplantation .
  • Cardiovascular disease (CVD): Adults with CKD have an increased risk of cardiovascular complications, including heart failure, ischemic heart disease, and stroke, independent of traditional risk factors. This risk remains heightened post-COVID-19 infection as well [1, ].
  • Renal anaemia: The reduced erythropoietin production in CKD leads to anaemia, which may require treatment with erythropoiesis-stimulating agents and iron supplementation ,.
  • Mineral and bone disorder: CKD results in disturbances in phosphate and calcium metabolism causing renal osteodystrophy. Management may require phosphate restriction, phosphate binders, and endocrinology input ,.
  • Metabolic acidosis: Persistent metabolic acidosis occurs due to impaired acid excretion in CKD, contributing to progression and bone disease ,.
  • Hyperkalaemia: Elevated serum potassium due to reduced renal excretion can complicate CKD and requires specialist dietary advice and monitoring ,.
  • Nutritional decline and malnutrition: CKD patients are at risk of worsening nutritional status, requiring dietary supervision to prevent malnutrition ,.
  • Urinary outflow obstruction and hydronephrosis: Structural causes of CKD or complications may lead to obstruction, sometimes requiring urological referral and potentially emergency intervention ,.
  • Risk of acute kidney injury (AKI): Patients with CKD are predisposed to AKI, especially with intercurrent illness or exposure to nephrotoxic drugs such as NSAIDs ,.
  • Psychosocial impact: Anxiety, depression, and reduced quality of life are common in CKD patients, necessitating psychological support as part of management .

In summary, CKD complications are systemic, affecting cardiovascular health, bone metabolism, haematopoiesis, acid-base balance, nutritional status, and urinary tract integrity. These complications highlight the importance of regular monitoring, comprehensive management, and specialist referral as appropriate to mitigate morbidity and mortality [1, 2, 3, 4, ].

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