System for withdrawing blood
AssigneeRoche Diabetes Care, Inc.
InventorsMichael Fritz, Klaus-Dieter Sacherer, Hans List, Thomas Weiss, Frank Deck, Claudio Immekus
Life of this patent
Estimating the term…
Abstract
The present invention includes a system for withdrawing body fluids. The system includes a drive unit having a plunger which is moved from a resting position into a lancing position in order to carry out a lancing process and a lancing unit containing a lancet with a needle. The plunger and lancet are coupled together by a form fit in order to carry out a lancing process. The invention additionally concerns a method for temporarily extending a needle from a device for withdrawing body fluid as well as a lancing unit that can be attached to the drive unit.
Claims23
Lancet comprising a needle and a needle tip wherein the needle tip is embedded in an elastomer before a puncture and wherein the elastomer is pierced by the needle during a puncture process in order to free the needle tip, wherein the lancet is used for withdrawal of blood, characterized in that the elastomer remains on the needle when the lancet is at a fully retracted position and the needle tip is exposed at the fully retracted position.
Method for temporarily extending a needle out of a device for withdrawing blood wherein the needle has a needle tip which is embedded in an elastomer before a puncture, comprising:
- carrying out the puncture during which the elastomer is pierced by the needle and
- retracting a lancet to a fully retracted position during which the elastomer remains on the needle and the needle tip is exposed in the fully retracted position.
Method for temporarily extending a needle from a device for withdrawing blood, comprising:
- coupling a lancet to a plunger of a drive unit in a form-fitting manner where either the plunger has a holding area and the lancet has a holding device or the lancet has a holding area and the plunger has a holding device,
- moving the plunger from a resting position in which the needle of the lancet is located inside a lancing unit into a position in which the needle emerges from an exit opening of the lancing unit, wherein at least one holding element of the holding device is moved transversely to a longitudinal direction by means of a longitudinal movement of the holding device during said moving the plunger from the resting position such that at least one holding element at least partially closes around the holding area, and
- moving the plunger back in order to retract the needle into the lancing unit.
Dependencies are inferred from the claim text.