an apparatus and a method for measuring a property of a blood sample is shown . the apparatus comprises of a housing having an aperture ; a shaft mounted inside the housing ; a testing member rotatably mounted on the shaft ; an actuating member coupled to the housing and configured to exert a force against the testing member ; and a lancet for eliciting a blood sample fixedly coupled to and protruding substantially radially from the testing member and configured to co - rotate with the testing member . the apparatus is further configured such that the lancet is aligned with the aperture in the housing when the testing member is in a first position . the testing member is configured , in the presence of a force exerted against the testing member by the actuator member , to translate to a second position in which the lancet is in a skin penetrating position .