Lancing system for the extraction of a body fluid
First Claim
1. A lancing system for extracting a body fluid from the skin of a human or animal, comprisinga needle element for lancing the skin,a lancing device, including a lancet drive by which a lancing movement of the needle element is driven in a lancing direction, the needle element being coupled with the lancet drive by means of a coupling mechanism,whereinthe lancing device comprises a housing with a housing opening at a front end thereof and the housing opening is surrounded by a housing skin contact surface which is pressed against the skin during use of the lancing device,the needle element is, during a forward phase of the lancing movement, moved on a predetermined lancing path in a lancing direction until a tip of the needle element enters the skin in order to create a wound and is again retracted in a return phase of the lancing movement after having reached a reversal point, the reversal point corresponding to the lancing depth in the skin,a lancing depth reference element is provided for improving the reproducibility of the lancing depth the lancing depth reference element comprising a reference skin contact surface and being adapted and arranged in such a manner that the reference skin contact surface is, at the reversal point of the lancing movement, in contact with the skin and the predetermined value of the lancing depth is determined by the distance in lancing direction that exists at the reversal point of the lancing movement between the reference skin contact surface and the position of the tip of the needle element,whereinthe lancing depth reference element is adapted and arranged in such a manner that during the lancing a skin-deformation-stabilizing compressive force acts between the reference skin contact surface and the skin, andthe skin-deformation-stabilizing compressive force is at most 7 N.
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Accused Products
Abstract
Lancing system comprising a needle and a lancing device The lancing device comprises a housing with a housing opening that is surrounded by a housing skin contact surface. A lancing depth reference element with a reference skin contact surface is adapted in such a manner that the reference skin contact surface at a reversal point of the lancing movement is in contact with the skin. The lancing depth is determined by the distance between the reference skin contact surface and the tip of the needle element at the reversal point of the lancing movement. The lancing depth reference element is in a stationary defined position relative to the reversal point of the lancing movement. The lancing depth reference element is adapted to stabilize the skin when pressed against the reference skin contact surface with respect to a skin deformation which occurs upon lancing of the skin.
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Citations
39 Claims
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1. A lancing system for extracting a body fluid from the skin of a human or animal, comprising
a needle element for lancing the skin, a lancing device, including a lancet drive by which a lancing movement of the needle element is driven in a lancing direction, the needle element being coupled with the lancet drive by means of a coupling mechanism, wherein the lancing device comprises a housing with a housing opening at a front end thereof and the housing opening is surrounded by a housing skin contact surface which is pressed against the skin during use of the lancing device, the needle element is, during a forward phase of the lancing movement, moved on a predetermined lancing path in a lancing direction until a tip of the needle element enters the skin in order to create a wound and is again retracted in a return phase of the lancing movement after having reached a reversal point, the reversal point corresponding to the lancing depth in the skin, a lancing depth reference element is provided for improving the reproducibility of the lancing depth the lancing depth reference element comprising a reference skin contact surface and being adapted and arranged in such a manner that the reference skin contact surface is, at the reversal point of the lancing movement, in contact with the skin and the predetermined value of the lancing depth is determined by the distance in lancing direction that exists at the reversal point of the lancing movement between the reference skin contact surface and the position of the tip of the needle element, wherein the lancing depth reference element is adapted and arranged in such a manner that during the lancing a skin-deformation-stabilizing compressive force acts between the reference skin contact surface and the skin, and the skin-deformation-stabilizing compressive force is at most 7 N.
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29. Lancing system for extracting a body fluid from the skin of a human or animal, comprising:
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a needle element for lancing the skin; a lancing device, including a lancet drive by which a lancing movement of the needle element is driven in a lancing direction, the needle element being coupled with the lancet drive by means of a coupling mechanism; wherein the lancing device comprises a housing with a housing opening at a front end thereof and the housing opening is surrounded by a housing skin contact surface which is pressed against the skin during use of the lancing device; the needle element is, during a forward phase of the lancing movement, moved on a predetermined lancing path in the lancing direction until a tip of the needle element enters the skin in order to create a wound and is again retracted in a return phase of the lancing movement after having reached a reversal point, the reversal point corresponding to the lancing depth in the skin; and a lancing depth reference element is provided for improving the reproducibility of the lancing depth, the lancing depth reference element comprising a reference skin contact surface and being adapted and arranged in such a manner that the reference skin contact surface is, at the reversal point of the lancing movement, in contact with the skin and the predetermined value of the lancing depth is determined by the distance in the lancing direction that exists at the reversal point of the lancing movement between the reference skin contact surface and the position of the tip of the needle element; wherein the needle element comprises a capillary channel through which a body fluid can be transported out of the skin; during a part of the return phase the lancing depth reference element is moved simultaneously with the needle element away from the skin; and after the reversal point of the lancing movement the needle element is moved opposite to the lancing direction to a defined residual lancing depth and thereafter the simultaneous movement of the lancing depth reference element and the needle element takes place with the needle element projecting from reference skin contact surface of the lancing depth reference element. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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Specification