System for withdrawing blood
First Claim
Patent Images
1. System for withdrawing body fluid comprising a drive unit (100, 100′
- ) having a plunger (10, 110) which is moved from a resting position into a lancing position in order to carry out a lancing process and a lancing unit (20, 120, 120′
) containing a lancet (30, 130, 130′
) with a needle which in the resting position of the plunger is arranged within the lancing unit and is displaced by the plunger when it moves into the lancing position in such a manner that the needle at least partially emerges through an exit opening (41, 41′
) in the lancing unit, wherein the plunger and lancet are coupled together by a form fit in order to carry out a lancing process and the plunger has a holding area (11) which can be held in a form-fitting manner by a holding device (32a, 32b) on the lancet or the lancet has a holding area (131) which can be held in a form-fitting manner by a holding device (132a, 132b) on the plunger, wherein the holding device is firstly opened and closes around the holding area by means of a longitudinal movement wherein at least one holding element of the holding device moves transversely to the longitudinal direction.
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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
19 Claims
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1. System for withdrawing body fluid comprising
a drive unit (100, 100′ - ) having a plunger (10, 110) which is moved from a resting position into a lancing position in order to carry out a lancing process and
a lancing unit (20, 120, 120′
) containing a lancet (30, 130, 130′
) with a needle which in the resting position of the plunger is arranged within the lancing unit and is displaced by the plunger when it moves into the lancing position in such a manner that the needle at least partially emerges through an exit opening (41, 41′
) in the lancing unit,wherein the plunger and lancet are coupled together by a form fit in order to carry out a lancing process and the plunger has a holding area (11) which can be held in a form-fitting manner by a holding device (32a, 32b) on the lancet or the lancet has a holding area (131) which can be held in a form-fitting manner by a holding device (132a, 132b) on the plunger, wherein the holding device is firstly opened and closes around the holding area by means of a longitudinal movement wherein at least one holding element of the holding device moves transversely to the longitudinal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- ) having a plunger (10, 110) which is moved from a resting position into a lancing position in order to carry out a lancing process and
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14. Method for temporarily extending a needle from a device for withdrawing body fluid comprising the steps
coupling a lancet (30, 130, 130′ - ) to a plunger (10, 110) of a drive unit in a form-fitting manner where either the plunger has a holding area (11) and the lancet has a holding device (32a, 32b) or the lancet has a holding area (131) and the plunger has a holding device (132a, 132b),
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 the longitudinal movement of the holding device such that at least one holding element at least partially closes around the holding area moving the plunger back in order to retract the needle into the lancing unit. - View Dependent Claims (15, 16)
- ) to a plunger (10, 110) of a drive unit in a form-fitting manner where either the plunger has a holding area (11) and the lancet has a holding device (32a, 32b) or the lancet has a holding area (131) and the plunger has a holding device (132a, 132b),
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17. Lancing unit (20) for attachment to a drive unit comprising
a lancet (30) having a needle and a holding device with holding elements (32a, 32b) to make a form-fitting connection with a plunger of the drive unit in which the holding device is firstly opened and the holding elements are moved transversely to the longitudinal direction when the lancet is moved longitudinally in a sleeve (40).
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19. System for withdrawing body fluid comprising
a drive unit (100, 100′ - ) having a plunger (10, 110) which is moved from a resting position into a lancing position in order to carry out a lancing process and
a lancing unit (20, 120, 120′
) containing a lancet (30, 130, 130′
) with a needle which in the resting position of the plunger is arranged within the lancing unit and is displaced by the plunger when it moves into the lancing position in such a manner that the needle at least partially emerges through an exit opening (41, 41′
) in the lancing unit,wherein the plunger and lancet are coupled together by a form fit in order to carry out the lancing process in a longitudinal direction by coupling a holding device (211) which is firstly opened to a holding area (232) by moving at least one holding element transversely to the longitudinal direction.
- ) having a plunger (10, 110) which is moved from a resting position into a lancing position in order to carry out a lancing process and
Specification