DEVICE AND METHOD FOR WITHDRAWING BODY FLUID
First Claim
1. A device for withdrawing body fluid, comprising:
- a lancing element for puncturing the skin of a body part, the lancing element having a receiving structure for collecting body fluid by capillary action;
a lancing drive for moving the lancing element in forward and return movements;
wherein, the duration of the return movement is several times longer than the duration of the forward movement, the return movement comprising a first retraction phase during which the lancing element moves at a maximum retraction speed of more than 0.02 m/s, the first retraction phase followed by a second retraction phase for collecting body fluid into the receiving structure, the lancing element moving during the second retraction phase for a duration of between 0.3 and 0.8 s and/or a retraction speed of between 0.6 and 2 mm/s.
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Accused Products
Abstract
The invention relates to a device for removing body fluid with a puncture element that can puncture the skin of a body part. The device includes a housing structure for body fluids obtained from the skin puncture and a puncture drive for a back and forth movement of the puncture element. The duration of withdrawal movement is longer than the duration of the forward movement. The puncture drive is designed to withdraw the puncture element in a first withdrawal phase of the withdrawal movement with a maximum withdrawal speed of more than 0.02 m/s. A second retraction phase follows the first retraction phase. Body fluid is collected during the second retraction phase, which has a duration of between 0.3 and 0.8 seconds and/or a retraction speed of between 0.6 and 2 mm/s.
14 Citations
34 Claims
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1. A device for withdrawing body fluid, comprising:
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a lancing element for puncturing the skin of a body part, the lancing element having a receiving structure for collecting body fluid by capillary action; a lancing drive for moving the lancing element in forward and return movements; wherein, the duration of the return movement is several times longer than the duration of the forward movement, the return movement comprising a first retraction phase during which the lancing element moves at a maximum retraction speed of more than 0.02 m/s, the first retraction phase followed by a second retraction phase for collecting body fluid into the receiving structure, the lancing element moving during the second retraction phase for a duration of between 0.3 and 0.8 s and/or a retraction speed of between 0.6 and 2 mm/s. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A device for withdrawing body fluid, comprising:
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a lancing element for puncturing the skin of a body part, the lancing element having a receiving structure for collecting body fluid by capillary action; a lancing drive for moving the lancing element in forward and return movements; a test element for detecting an analyte in the body fluid configured such that the transfer time for transferring the body fluid from the receiving structure onto the test element is less than 0.5 s, wherein the total duration from the start of the return movement of the lancing element until completion of loading the test element with the body fluid is less than 2 s. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method of collecting body fluid with a lancing element having a tip and a receiving structure for collecting blood by capillary action, the method comprising:
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inserting the tip of the lancing element into the skin of a body part to a puncture depth; retracting the tip at a speed of more than 0.02 m/s during a first retraction phase; and
thenretracting the tip during a second retraction phase during which body fluid is collected in the receiving structure, the second retraction phase having a duration of between 0.3 and 0.8 s and/or the tip of the lancing element having a retraction speed of between 0.6 and 2 mm/s. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification