Capillary tube tip design to assist blood flow
First Claim
Patent Images
1. A body fluid sampling device, comprising:
- a sample acquisition element defining a cavity;
a incision forming member slidably disposed in the cavity to form an incision in skin, the sample acquisition element and the incision forming member defining a fluid passage that is sized to draw body fluid from the incision via capillary action; and
wherein the sample acquisition element has a skin contact surface that is shaped to maintain the incision open as the sample acquisition element is pressed against the skin to draw the body fluid into the fluid passage.
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Abstract
A body fluid sampling device with an incision forming member travels longitudinally within a capillary member with a capillary tube tip to maintain the incision open when the body fluid sampling device is presented into the skin. The body fluid sampling device both creates the incision and obtains the bodily fluid sample without having to be adjusted or removed from the skin.
221 Citations
20 Claims
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1. A body fluid sampling device, comprising:
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a sample acquisition element defining a cavity;
a incision forming member slidably disposed in the cavity to form an incision in skin, the sample acquisition element and the incision forming member defining a fluid passage that is sized to draw body fluid from the incision via capillary action; and
wherein the sample acquisition element has a skin contact surface that is shaped to maintain the incision open as the sample acquisition element is pressed against the skin to draw the body fluid into the fluid passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A body fluid sampling device, comprising:
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a sample acquisition element defining a fluid cavity sized to draw body fluid via capillary action;
a incision forming member slidably disposed in the fluid cavity to form an incision in skin; and
wherein the sample acquisition element has a skin contact surface that is asymmetrically shaped to apply an asymmetric force to the skin surrounding the incision to keep the incision open. - View Dependent Claims (14, 15, 16, 17)
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18. A method, comprising:
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forming an incision in skin with a incision forming member of a sampling device that has a skin contact surface and defines a fluid cavity;
applying an asymmetrical force around the incision by pressing the skin contact surface against the skin; and
drawing body fluid into the fluid cavity of the sampling device via capillary action. - View Dependent Claims (19)
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20. A body fluid sampling device, comprising:
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means for forming an incision in the skin;
means for applying an asymmetric force to the skin surrounding the incision; and
means for drawing the body fluid from the incision.
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Specification