FBC - neutrophil leucocytosis is common; anaemia may result from extravasation into the bitten limb and haemolysis; thrombocytopenia
clotting screen - mild coagulopathymay occur (prolonged prothrombin time and activated partial thromboplastin time, hypofibrinogenaemia, and raised fibrin degradation products or D-dimer) Consumption coagulopathy is uncommon
biochemistry - raised serum creatine kinase, transaminases, urea, and creatinine may occur; bicarbonate may be reduced
ECG - possible features include include tachyarrhythmias, bradyarrhythmias, atrial fibrillation, flattening or inversion of T waves, ST elevation or depression, second degree heart block. Myocardial infarction may occasionally occur following an adder bite.
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