Cyanosis laboratory findings

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Sara Zand, M.D.[2] Amandeep Singh M.D.[3]

Laboratory findings consistent with the diagnosis of central cyanosis include Polycythemia due to secondary erythrocytosis, Elevated prothrombin time and partial thromboplastin time , decreased levels of factors 5,7,8,9 (qualitative and quantitative),Platelet disorder, increased fibrinolysis and paradoxical thrombotic tendency, Proteinuria, Hyperuricemia, Renal failure and nephrolithiasis.

• Laboratory findings consistent with the diagnosis of cyanosis in older children include:^[1]

• Polycythemia due to secondary erythrocytosis
• Elevated prothrombin time and partial thromboplastin time
• Decreased levels of factors 5,7,8,9: qualitative and quantitative
• Platelet disorder
• Increased fibrinolysis and paradoxical thrombotic tendency
• Proteinuria
• Hyperuricemia
• Renal failure
• Uric acid nephrolithiasis