Case 7: An inherited bleeding disorder.
| Test . | Pre-desmopressin . | Post-desmopressin . |
|---|---|---|
| Abbreviations: aPTT, activated partial thromboplastin time | ||
| Bleeding time (minutes) | 14 | 10 |
| aPTT (seconds) | 44 | 29 |
| Ristocetin-platelet aggregation | Absent | Present |
| von Willebrand Factor antigen (%) | 10 | 27 |
| Ristocetin cofactor activity (%) | < 20 | < 20 |
| Factor VIII (%) | 6 | 46 |
| Test . | Pre-desmopressin . | Post-desmopressin . |
|---|---|---|
| Abbreviations: aPTT, activated partial thromboplastin time | ||
| Bleeding time (minutes) | 14 | 10 |
| aPTT (seconds) | 44 | 29 |
| Ristocetin-platelet aggregation | Absent | Present |
| von Willebrand Factor antigen (%) | 10 | 27 |
| Ristocetin cofactor activity (%) | < 20 | < 20 |
| Factor VIII (%) | 6 | 46 |