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AssigneeRoche Diagnostics Operations, Inc.
InventorsFrank Deck, Christian Hoerauf, Malte Hinrichs, Hartmut Berg, Torsten Grunwald, Mathias Jotter, Manfred Rufer, Jens Storjohann
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The present invention relates to a lancet device, by which a lancet can be displaced along a piercing path for generating a piercing wound in a skin surface, in particular to obtain bodily fluid for diagnostic purposes, comprising a lancet drive having drive means to generate a drive force for a piercing movement of the lancet along the piercing path in the direction toward the skin surface. According to the present invention, the lancet drive comprises a magnet, by which a magnetic retention force oriented opposite to the drive force may be generated, and the lancet drive also comprises triggering means, by which the retention force may be reduced enough that the lancet is accelerated in the direction toward the skin surface under the effect of the drive force generated by the drive means. The present invention also relates to a method for generating a piercing wound, in which the drive spring is held in a tensioned state using a magnetic retention force oriented opposite to the drive force before the triggering of a piercing wound.
A lancet device, by which a lancet can be displaced along a piercing path to generate a piercing wound in a skin surface, in particular to obtain bodily fluid for diagnostic purposes, comprising
A method for generating a piercing wound in a skin surface using a lancet, in which the lancet is accelerated along a piercing path in the direction toward the skin surface using a drive force generated by a drive spring, wherein the drive spring is held in a tensioned state before the triggering of a piercing movement using a magnetic retention force oriented opposite to the drive force, and the retention force is reduced enough to trigger a piercing movement so that the drive spring relaxes and the lancet is accelerated in the direction toward the skin surface under the effect of the drive force generated by the drive spring.
The method according to claim 14, wherein the magnetic retention force is generated using a permanent magnet and the retention force is at least partially, preferably completely compensated for by a magnetic field generated using a coil to trigger a piercing movement.
The method according to claim 15, wherein a magnetic field, which reinforces the retention force exerted by the permanent magnet, is generated using the coil to support a retraction movement of the lancet.
Dependencies are inferred from the claim text.