Table 1. Summary of lab workup performed to rule out confounding conditions.
CBC: complete blood count; WBC: white blood cell count; RBC: red blood cell count; Hgb: hemoglobin; MCV: mean cell volume; MCHC: mean cell hemoglobin concentration; MCH: mean cell hemoglobin; PTT: partial thromboplastin time; INR: international normalized ratio; ANA: anti-nuclear antibody screen; IgA, M, G: immunoglobulin A, M, G
| Lab parameter | Timeline | |||
| CBC | February 18, 2022 | February 19, 2022 | February 20, 2022 | February 21, 2022 |
| WBC | 8.29k/µL | 7.47-7.97k/µL | 5.47k/µL | 5.32k/µL |
| RBC | 6.07 million/µL | 5.47million/µL | 4.44 million/µL | 4.01 million/µL |
| Hb | 17g/dL | 15.6g/dL | 12.4g/dL | 11.5g/dL |
| Platelets | 3000/µL | 0/µL | 6000/µL | 41000/µL |
| MCV | 82fL | 82.1-82.4fL | 83fL | 85fL |
| MCHC | 34.1g/dL | 34.4g/dL | 33.3g/dL | 33.7g/dL |
| MCH | 28pg | 28.3-28.5pg | 27.9pg | 28.7pg |
| RBC morphology | - | - | Normal | Normal |
| Platelet sufficiency | Significantly decreased | Significantly decreased | Significantly decreased | Significantly decreased |
| Hemoglobin A1C | - | - | 10.4 | - |
| Partial thromboplastin time | 36.5 | 29.2-34.9 | - | - |
| Thrombin clotting time | - | 16.9 | - | - |
| Immediate PTT 1:1 MX | - | 26.2 | - | - |
| Prothrombin time | - | 10.6 | - | - |
| INR | - | 0.96 | - | - |
| LA ratio | - | 1.81 | - | - |
| LA ratio mix | - | 1.42 | - | - |
| Hexagonal phospholipid neutralisation | - | 31.0 | - | - |
| ANA screen | - | Negative | - | - |
| Beta 2 glycoprotein IgA, IgG, IgM | - | Negative | - | - |
| Cardiolipin IgG, IgM, IgA | - | Negative | - | - |
| COVID-19 | - | Negative | - | - |