System for withdrawing blood
First Claim
1. System for withdrawing body fluid comprisinga drive unit having a plunger which is moved from a resting position into a lancing position in order to carry out a lancing process anda lancing unit containing a lancet 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 in the lancing unit,wherein the plunger and lancet are coupled together by a form fit in order to carry out a lancing process andthe plunger has a holding area which can be held in a form-fitting manner by a holding device on the lancet orthe lancet has a holding area which can be held in a form-fitting manner by a holding device on the plunger, wherein the holding device is firstly opened and closes around the holding area by means of a longitudinal movementwherein at least one holding element of the holding device moves transversely to the longitudinal direction,wherein the plunger and the lancet are decoupled with the holding device open when the plunger is at the resting position, wherein the at least one holding element is configured to move in a transverse direction to couple the plunger and the lancet when the plunger moves longitudinally from the resting position to the lancing position.
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Accused Products
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.
171 Citations
27 Claims
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1. 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 containing a lancet 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 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 which can be held in a form-fitting manner by a holding device on the lancet or the lancet has a holding area which can be held in a form-fitting manner by a holding device 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, wherein the plunger and the lancet are decoupled with the holding device open when the plunger is at the resting position, wherein the at least one holding element is configured to move in a transverse direction to couple the plunger and the lancet when the plunger moves longitudinally from the resting position to the lancing position.
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21. Lancing unit for attachment to a drive unit comprising
a lancet having a needle and a holding device with holding elements 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 in a transverse direction to the longitudinal direction when the lancet is moved longitudinally in a sleeve, wherein the holding elements have an open position where the lancet is decoupled from the plunger, wherein the holding elements have a coupled position where the lancet is coupled to the plunger, wherein the holding elements move in the transverse direction from the opened position to the coupled position as the plunger moves the lancet in the longitudinal direction within the sleeve during lancing.
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23. 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 containing a lancet 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 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 which is firstly opened to a holding area by moving at least one holding element transversely to the longitudinal direction, wherein the plunger and the lancet are decoupled with the holding device open when the plunger is at the resting position, wherein the at least one holding element is configured to move in a transverse direction to couple the plunger and the lancet when the plunger moves longitudinally from the resting position to the lancing position.
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24. 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 and a lancing unit containing a lancet 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 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 which can be held in a form-fitting manner by a holding device on the lancet or the lancet has a holding area which can be held in a form-fitting manner by a holding device 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, in which the plunger is coupled to the lancet in a form-fitting manner when the lancing unit is attached to the drive unit, wherein the plunger and the lancet are decoupled with the holding device open when the plunger is at the resting position, wherein the holding elements are configured to move in a transverse direction to couple the plunger and the lancet when the plunger moves longitudinally from the resting position to the lancing position. - View Dependent Claims (25, 26, 27)
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Specification