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Overcoming Spurious Hyperkalemia Due To Platelets | 89491
ISSN: 2476-2024

Diagnostic Pathology: Open Access
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Overcoming spurious hyperkalemia due to platelets

13th International Conference on Laboratory Medicine & Pathology

Suhanyah Mahathevan, Siriwardene S C and Hewamana S

Lanka Hospitals Diagnostics, Sri Lanka Lanka Hospital, Sri Lanka

Posters & Accepted Abstracts: Diagn Pathol Open

DOI: 10.4172/2476-2024-C1-003

Background: The occurrence of spuriously high serum potassium levels have been associated with high platelet counts. It is due to the degranulation of platelets during clotting in vitro, releasing potassium into the serum. Case Presentation: A 69-year-old man was admitted following a fall. On admission the white cell count was 12,920/µL, hemoglobin 83 g/L and the platelet count 1,550,000/µL (150,000-450,000). Serum sodium, potassium and chloride were respectively 141, 5.8 (3.5-5.1) and 113 mmol/L respectively. Plasma sodium, potassium and chloride (on a sample collected into lithium heparin at the same time) were 141, 4.3 and 112 mmol/L, respectively. Serum creatinine was 1.5 mg/dL (0.81.3). The blood picture showed macrocytes and spherocytes with normal leucocytes, together with severe thrombocytosis. Bone marrow was normocellular and had increased megakaryocytes with some dysplastic forms. Platelet lakes/clumps were prominent. The myeloid series was normal and the erythroid series had reduced precursors. The trephine biopsy showed increased megakaryocytes with clustering, without significant fibrosis. JAK2 V617F mutation was detected. The patient was diagnosed to have essential thrombocythemia. Discussion: This case illustrates the occurrence of spurious hyperkalemia associated with marked thrombocytosis. The collection of a sample into lithium heparin at the same time, allowed the laboratory to issue the true potassium level. Essential thrombocythemia is identified by an increased platelet count due to abnormal pluripotent stem cell proliferation resulting in excessive megakaryocyte division. The above investigations supports this diagnosis as against a secondary thrombocythemia. The clinical complications involve the sequela of abnormal platelet function, namely haemorrhage or thrombosis. Potassium measurement should be performed in a plasma sample (and not in serum) in the presence of marked thrombocytosis.

I am Suhanyah Mahathevan. I work as a Biomedical Scientist in Lanka Hospital Diagnostics, Sri lanka.My education qualifications: BSC (Chemistry,Graduate Chemist),MSC (Biomedical Science,University of East London,UK),MBA(University of Kelaniya),International Specialist in Chemistry from American Society of Clinical Pathology (SC- ASCP),Srilanka Medical Council Registered Medical Technologist ( Reg No:2178).

E-mail: [email protected]