Device and method for withdrawing body fluid
First Claim
1. A device for withdrawing body fluid, comprising:
- a lancing element adapted for puncturing the skin of a body part, the lancing element having a lancet tip and 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 longer than the duration of the forward movement, the return movement comprising a first retraction phase during which the lancing drive is configured to move the lancing element 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 second retraction phase beginning with a retraction movement of the lancing element and continuing until the lancet tip exits the skin, the lancing drive being configured to move the lancing element 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.
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Citations
48 Claims
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1. A device for withdrawing body fluid, comprising:
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a lancing element adapted for puncturing the skin of a body part, the lancing element having a lancet tip and 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 longer than the duration of the forward movement, the return movement comprising a first retraction phase during which the lancing drive is configured to move the lancing element 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 second retraction phase beginning with a retraction movement of the lancing element and continuing until the lancet tip exits the skin, the lancing drive being configured to move the lancing element 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, 35, 36)
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19. A device for withdrawing body fluid, comprising:
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a lancing element adapted 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, the lancing drive configured to move the lancing element at a speed during the return movement 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; further wherein the return movement comprises a first retraction phase followed by a second retraction phase, the second retraction phase configured for collecting body fluid into the receiving structure, the lancing drive being configured to move the lancing element during the second retraction phase at a retraction speed of between 0.6 and 2 mm/s, wherein the second retraction phase begins with a retraction movement of the lancing element and continues until the lancet tip exits the skin. - View Dependent Claims (20, 21, 22, 23, 24, 40)
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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 beginning with a retraction movement of the tip and continuing until the tip exits the skin, 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, 37, 38, 39)
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41. A device for withdrawing body fluid, comprising:
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a lancing element adapted for puncturing the skin of a body part, the lancing element having a receiving structure for collecting body fluid by capillary action; and a lancing drive for moving the lancing element in forward and return movements; wherein, the duration of the return movement is longer than the duration of the forward movement, the return movement comprising a first retraction phase during which the lancing drive is configured to move the lancing element 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, wherein the duration of the dwell time of the lancet tip during the retraction movement in the second retraction phase is between 0.3 and 0.8 s and/or the average speed of the lancing element during the retraction movement in the second retraction phase is 0.6 to 2 mm/s. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48)
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Specification