a disposable blood holding cassette for haemostatic measurements . a single unit is provided having a blood sample container with three separate pressurized blood sample reservoirs . a waste blood collection reservoir is connected to the blood sample container , and connected thereto via first , second and third blood sample tubes . a punching station is provided to accurately punch first and second of the blood sample tubes , simulating haemostasis function in vitro . measurements may be made of the haemostatic and thrombolytic function of recently sampled blood . the entire device is disposable , isolating any contaminated blood from clinical personnel .