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US 2013/0158373 A1Published application
System for withdrawing small amounts of body fluid
AssigneeRoche Diagnostics Operations, Inc.
InventorsCarlo Effenhauser, Heinz-Michael Hein, Karl-Heinz Koelker, Frank Deck
Life of this patent
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Abstract
A system is provided for withdrawing small amounts of body fluid from an animal or human. The system includes a holder and a disposable lancing unit attached to the holder. The lancing unit also includes an open capillary channel for transporting the body fluid and piercing the skin.
Claims19
A system, comprising:
- a disposable lancing unit having a needle with a distal end for piercing a surface of skin, wherein the needle has at least one capillary structure that is open to the outside from at least the distal end to at least an upper end of the needle;
- and
- a drive unit configured to hold the distal end of the needle below the surface of the skin and the upper end above the surface of the skin during fluid collection.
A method, comprising:
- piercing a surface of skin with a lancing unit by actuating a drive unit;
- collecting body fluid with an uncovered capillary groove of the lancing unit by positioning the lancing unit with the drive unit so that the uncovered capillary groove extends from below the surface of the skin to above the surface of the skin;
- and
- transporting the body fluid in the uncovered capillary groove solely via capillary action to a detection zone of the lancing unit.
1 more element
A method of manufacturing a disposable lancing unit, comprising:
- creating an open capillary groove in a surface of a holding area from a distal end of a lancing tip to a holding area, the capillary groove being configured to draw body fluid solely via capillary action;
- leaving the open capillary groove uncovered along the entire length of the lancing tip;
- and
- applying a detection zone over the capillary groove at the holding area.
1 more element
Dependencies are inferred from the claim text.