PIERCING SYSTEM FOR REMOVING A SAMPLE OF BODILY FLUID

摘要

The invention relates to a microsampler piercing system for removing a sample of bodily fluid from a body part. Said system comprises: a sampling unit with a piercing element and a piercing device with a drive, which is used to displace a sampling unit along a displacement path, in order to allow the piercing element to penetrate and be withdrawn from the skin of the body part by means of a piercing and retraction displacement; an adjusting device for adjusting the piercing depth of the wound that is to be pierced; and a control unit for controlling the piercing and retraction displacement with the following sequential displacement phases: a propulsion phase (V), in which the piercing element (5) penetrates the skin to a defined pierced depth (dm); a withdrawal phase (R1), in which the piercing element (5) is partially withdrawn over a withdrawal distance (?d), slowing down towards the end of the withdrawal phase (R1) so that it is lodged in the skin at a defined pierced remainder depth (dr); and a collection phase (S), in which the piercing element remains lodged in the skin and the sampling unit takes a sample of bodily fluid. The adjusting device is configured in such a way that the defined pierced depth can be adjusted independently of the defined pierced remainder depth that is defined by temporal means , in relation to the collection phase.