Puncturing System For Collecting Body Fluid Sample
First Claim
1. A microsampler puncturing system for collecting a body fluid sample from a body part, comprisinga sample collection unit having a piercing element, andstanla puncturing instrument havinga drive by which the sample collection unit is movable on a movement path in a piercing and retraction movement for piercing the piercing element into skin of the body part creating a piercing wound and withdrawing the piercing element thereafter,a setting device for setting a defined puncturing depth of the piercing wound, anda control device for controlling the piercing and retraction movement, the piercing and retraction movement including the following sequentially executed movement phasesa forward phase, in which the piercing element is moved in a puncturing direction and pierced to the defined puncturing depth,retraction phase, in which the piercing element is partially withdrawn by a retraction distance and is decelerated toward an end of the retraction phase, so that the piercing element projects into the skin to a defined residual puncturing depth, anda collecting phase, in which the piercing element projects into the skin at the defined residual puncturing depth and a body fluid sample is withdrawn by the sample collection unit,whereinthe setting device is adapted for setting the defined puncturing depth independently of a mean value of the defined residual puncturing depth, with reference to the collecting phase.
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Accused Products
Abstract
The invention relates to a microsampler puncturing system for collecting a body fluid from a body part, comprising a sample collection unit having a piercing element, and a puncturing instrument having a drive, by which a sample collection unit is movable on a movement path for piercing the piercing element into the skin of the body part and withdraw it again by means of a piercing and retraction movement, a setting device for setting the puncturing depth of the piercing wound to be generated, and a control device for controlling the piercing and retraction movement having the following sequentially executed movement phases: a forward phase (V), in which the piercing element is pierced up to a defined puncturing depth (dm), a retraction phase (R1), in which the piercing element is partially retracted by a retraction distance (Δd) and is decelerated toward the end of the retraction phase (R1), so that it remains projecting into the skin at a defined residual puncturing depth (dr), and a collecting phase (S), in which the piercing element projects into the skin and a body fluid sample is absorbed by the sample collection unit. The setting device is adapted for the defined puncturing depth is settable independently of the chronological mean <dr> of the defined residual puncturing depth (dr), with reference to the collecting phase.
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Citations
31 Claims
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1. A microsampler puncturing system for collecting a body fluid sample from a body part, comprising
a sample collection unit having a piercing element, andstanl a puncturing instrument having a drive by which the sample collection unit is movable on a movement path in a piercing and retraction movement for piercing the piercing element into skin of the body part creating a piercing wound and withdrawing the piercing element thereafter, a setting device for setting a defined puncturing depth of the piercing wound, and a control device for controlling the piercing and retraction movement, the piercing and retraction movement including the following sequentially executed movement phases a forward phase, in which the piercing element is moved in a puncturing direction and pierced to the defined puncturing depth, retraction phase, in which the piercing element is partially withdrawn by a retraction distance and is decelerated toward an end of the retraction phase, so that the piercing element projects into the skin to a defined residual puncturing depth, and a collecting phase, in which the piercing element projects into the skin at the defined residual puncturing depth and a body fluid sample is withdrawn by the sample collection unit, wherein the setting device is adapted for setting the defined puncturing depth independently of a mean value of the defined residual puncturing depth, with reference to the collecting phase.
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28. A puncturing instrument, comprising
a sample collection unit, a lancet holder for holding the sample collection unit, a drive for driving the lancet holder through a piercing and retraction movement, and a damping mechanism coupled to the lancet holder to damp deceleration of the lancet holder toward an end of the retraction movement.
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31. A puncturing instrument for collecting a fluid sample, comprising
a sample collection unit having a piercing element, a control device for controlling movement of the sample collection unit through a plurality of movement phases including a forward phase wherein the piercing element pierces skin of a body and moves to a puncturing depth, a retraction phase wherein the piercing element retracts from the puncturing depth to a residual depth, and a collection phase wherein the sample collection unit collects the fluid sample while the piercing element is substantially at the residual depth, and a setting device configured to set the puncturing depth independently of the residual depth.
Specification