A third interview, video call, with an Hospital B patient on a different factor product and dosing rule than Patient 01. In the last twenty minutes, at his own request, he stopped answering the prep sheet and started describing a product.
The patient
Patient 03, adult with haemophilia B, factor IX, Hospital B. Two fixed doses: nine for prophylaxis, twelve for a bleed. Target joints right elbow and ankle; kept an Excel log for years.
The method
Video call, about 81 minutes. Ariel led the experience half, a second teammate the problem-statement half, Gerald closed on what he wants built, against the prep sheet above.
The limits
One experienced factor IX patient. Recording starts a few minutes late; the last twenty minutes are a stakeholder brief, not observation.