Rapid blood expression and sampling
First Claim
1. A method of sampling body fluid before reflexive action occurs, comprising:
- pressing an expression unit against skin;
piercing the skin with a skin-piercing member that includes a fluid collection structure;
collecting the body fluid with the fluid collection structure after said piercing the skin;
removing the skin-piercing member from the skin; and
said collecting the body fluid and said removing the skin-piercing member occur before the reflexive action occurs as a result of said piercing the skin, in which said collecting the body fluid and said removing the skin-piercing member occur within 150 ms from the beginning of said piercing the skin.
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Accused Products
Abstract
Body fluid sampling device comprising a skin-piercing element having a collection zone for receiving body fluid, the device further comprising a fluid receiving means remotely spaced apart from the collection zone so that body fluid in the collection zone will not contact the fluid receiving means initially. The collection zone takes up a very small volume of body fluid of about 10 to 500 nl in a very short time period of less than 0.5 seconds. The fluid receiving means may have a test zone for performing an analytical reaction. Fluid sample from the collection zone is automatically or manually transported to the fluid receiving means to contact the fluid with the test zone.
52 Citations
47 Claims
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1. A method of sampling body fluid before reflexive action occurs, comprising:
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pressing an expression unit against skin; piercing the skin with a skin-piercing member that includes a fluid collection structure; collecting the body fluid with the fluid collection structure after said piercing the skin; removing the skin-piercing member from the skin; and said collecting the body fluid and said removing the skin-piercing member occur before the reflexive action occurs as a result of said piercing the skin, in which said collecting the body fluid and said removing the skin-piercing member occur within 150 ms from the beginning of said piercing the skin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of collecting fluid from skin to achieve a high collection success rate, comprising:
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pressurizing the fluid beneath the skin by pressing an expression member against the skin; penetrating the skin with a micro-sampler, wherein the micro-sampler has a shaft with a tip, an open capillary channel defined along the shaft, and an entrance of the capillary channel that is recessed 350 to 600 μ
m from the tip of the shaft;withdrawing the micro-sampler from the skin at a speed slower than during said penetrating the skin; and removing the micro-sampler completely from the skin with a sufficient fluid sample for accurate testing at least clung to the micro-sampler within 150 ms of said penetrating. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. An apparatus, comprising:
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a micro-sampler configured to collect body fluid from skin, the micro-sampler including a body, a shaft with a pointed tip extending from the body to penetrate the skin, an open capillary channel extending along the shaft with a capillary channel opening for collecting the body fluid via capillary action, the capillary channel being hydrophilic, the capillary channel opening being located between 350 to 600 μ
m from the pointed tip; andwherein the shaft has an open section located between the capillary channel opening and the pointed tip, the open section being configured to provide an insufficient contact area to draw fluid via capillary action. - View Dependent Claims (42, 43, 44, 45, 46, 47)
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Specification