Patent ID: 9186104
Filing Date: 2015-11-17
Classification: A61B

Abstract:
1. An instrument for producing a body fluid sample for analysis by piercing skin with a lancing element having a piercing tip, the instrument comprising: a housing; a lancing drive within the housing for driving a lancing element connected thereto in a puncturing movement in which the lancing element moves, after triggering the puncturing movement, in a puncture direction until the lancing element reaches a point of maximum displacement and in a reverse direction after the lancing element has reached the point of maximum displacement; a pressure ring configured to be pressed against the skin such that the skin bulges into a skin contact opening for promoting expression of body fluid, wherein the pressure ring defines an opening area corresponding to a circle with a diameter of at least 3 mm and at most 8 mm; and a pressing force control device for controlling a pressing force between the pressure ring and the skin at the time of triggering the puncturing movement, wherein the pressing force at the time of triggering is at least 3 N and at most 8 N, wherein the instrument works without a z-position detection means and without a penetration depth reference element configured for contacting the skin that bulges into the pressure ring.