Table 1

Summary table outlining the workup performed to rule out underlying thrombotic disorders

TestOne-time testsOn admissionOn dischargeOn readmission
COVID-19 (Rapid Abbott)NegativeNegative
Prothrombin Time (PT) (s)12.2
Activated Partial Thromboplastin Time (aPTT) (s)26.4
International Normalized Ratio (INR)1.13
Fibrinogen (mg/dL)142
Platelets (×103/μL)21132168
Slide reviewDecreased platelet sufficiencyDecreased platelet sufficiency
D-dimer (mg/L)>35.20
White Blood Cell Count (WBC) (×103/μL)7.145.776.14
Rheumatoid factor (IU/mL)9
Anti-DS DNANegative
Anti-Smith antibodyNegative
Cardiolipin IgA/G/M (U/mL)0.7/<1.6/1.8
Factor V Leiden mutationNegative
Peripheral smearThrombocytopenia with high mean platelet volume (MPV)
Lactate Dehydrogenase (LDH) (U/L)233
Indirect CoombsNegative
Blood type ABO/RhO positive
anti-nuclear antibody (ANA)Positive
Prothrombin factor II 20210G>A mutationNegative
Antithrombin III activity143 %
Antithrombin III antigen113%
Protein C activity113%
Protein C antigen117%
Protein S activity88%
Protein S antigen113%
Hexagonal phospholipidsNegative
Heparin induced platelet Ab (HIT) (PF4 Ab) (Units-OD)2.702
Platelet Ab direct flow cytometryNegative
Factor VIII antigen180%
Lupus inhibitor/anticoagulantNegative, test suggestive of heparin effect
Creatinine (mg/dL)
Troponin I (ng/mL)0.0030.1070
  • PF4, platelet factor 4.