System for withdrawing blood
First Claim
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1. A lancing unit, comprising:
- a plurality of lancets, wherein each of the plurality of lancets includes 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, 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; and
a magazine containing the plurality of lancets which can be successively coupled to a plunger of a drive unit.
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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.
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Citations
23 Claims
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1. A lancing unit, comprising:
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a plurality of lancets, wherein each of the plurality of lancets includes 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, 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; and a magazine containing the plurality of lancets which can be successively coupled to a plunger of a drive unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. System for withdrawing body fluid comprising
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 including a plurality of lancets, wherein each of the plurality of lancets includes 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, 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, a magazine containing the plurality of lancets which can be successively coupled to the plunger of the drive unit, and where each of the plurality of lancets is arranged within the lancing unit in the resting position of the plunger and is displaced by the plunger when the plunger moves into the lancing position in such a manner that the needle at least partially emerges through an exit opening in the lancing unit.
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15. Method for temporarily extending a first needle out of a device for withdrawing body fluid, comprising the steps
coupling the first needle of a plurality of needles contained in a magazine to a plunger of a drive unit, wherein each of the plurality of needles has a needle tip embedded in an elastomer before the puncture; -
carrying out a puncture with the plunger during which the elastomer is pierced by the first needle; retracting the needle to a fully retracted position with the plunger during which the elastomer remains on the needle and the needle tip is exposed in the fully retracted position; and coupling a second needle of the plurality of needles contained in the magazine to the plunger. - View Dependent Claims (16)
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17. Method for temporarily extending a needle from a device for withdrawing body fluid, comprising:
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coupling a lancet to a plunger of a drive unit in a form-fitting manner, wherein the lancet is one of a plurality contained in a magazine which can be successively coupled to the plunger of the drive unit, 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 the 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. - View Dependent Claims (18, 19, 20, 21, 22)
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23. System for withdrawing body fluid comprising:
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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; a lancing unit in which a lancet with a needle is located, wherein the lancet includes 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, 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, where the lancet is arranged within the lancing unit in the resting position of the plunger and is displaced by the plunger when the plunger moves into the lancing position in such a manner that the needle at least partially emerges through an exit opening in the lancing unit; wherein the lancet includes at least one holding element configured to move transversely to a direction the plunger moves in order to carry out the lancing process; wherein the plunger and the at least one holding element are decoupled when at the resting position; a sleeve in which the lancet is disposed; and wherein the at least one holding element has a shoulder configured to retain the needle tip within the sleeve when the lancet is retracted and the needle tip is exposed.
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Specification