Device for sampling bodily fluids
First Claim
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1. Apparatus for sampling bodily fluids comprising:
- an elongated lancing medium having a skin piercing end adapted to be displaced against a skin site for making an incision,a transport medium separated from said lancing medium and adapted to retain a droplet of bodily fluid from the incision between said transport medium and said elongated lancing medium by capillary action, the retained droplet being held relatively stationary with respect to the transport medium,one of said lancing and transport mediums having hydrophobic material on its surface and the other having hydrophilic material on its surface, anda mechanism for displacing said transport medium relative to said lancing medium, said mechanism adapted to move the droplet of bodily fluid retained by said transport medium away from said skin site.
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Abstract
A bodily fluid sampling device comprising a lancet which can be advanced against a skin-piercing site to produce a droplet of bodily fluid. A transport medium is positioned sufficiently close to the lancing medium to retain a droplet of bodily fluid therebetween by capillary action. One of the two mediums has hydrophobic material on its surface and the other hydrophilic. Various mechanisms are provided for relatively displacing the lancing and transport medium to move the droplet of bodily fluid away from the skin-piercing end.
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Citations
49 Claims
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1. Apparatus for sampling bodily fluids comprising:
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an elongated lancing medium having a skin piercing end adapted to be displaced against a skin site for making an incision, a transport medium separated from said lancing medium and adapted to retain a droplet of bodily fluid from the incision between said transport medium and said elongated lancing medium by capillary action, the retained droplet being held relatively stationary with respect to the transport medium, one of said lancing and transport mediums having hydrophobic material on its surface and the other having hydrophilic material on its surface, and a mechanism for displacing said transport medium relative to said lancing medium, said mechanism adapted to move the droplet of bodily fluid retained by said transport medium away from said skin site. - 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 sampling bodily fluids comprising:
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an elongated lancing medium having a skin-piercing end adapted to be displaced against a skin site for making an incision, a transport medium spaced from said lancing medium and adapted to retain a droplet of bodily fluid from the incision therebetween by capillary action, one of said lancing and transport mediums having hydrophilic material on its surface and the other having hydrophobic material on its surface, and means for relatively displacing said lancing medium and said transport medium, said means adapted to move the droplet of bodily fluid retained by said transport medium away from said skin-piercing end and along said elongated lancing medium as the transport medium is displaced away from said skin-piercing end. - View Dependent Claims (20, 21, 22)
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23. Apparatus for sampling bodily fluids comprising:
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an elongated lancing medium having a length and a skin piercing end, said skin piercing end adapted to be displaced against a skin site for making an incision, an elongated transport medium with a fluid retaining member adapted to contact bodily fluid from the incision, said fluid retaining member positioned adjacent said lancing medium and spaced to suspend bodily fluid from the incision between said fluid retaining member and said lancing medium by capillary action, and wherein said elongated transport medium is adapted to separate a droplet of bodily fluid suspended between said fluid retaining member and said lancing medium from said skin piercing end, said droplet having a volume of no more than 1.0 microliters. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An apparatus for sampling bodily fluids comprising:
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an elongated lancing medium having a skin-piercing end adapted to be displaced against a skin site for making an incision, a transport medium spaced from said lancing medium adapted to retain a droplet of bodily fluid from the incision therebetween by capillary action, one of said lancing and transport mediums having hydrophilic material on its surface and the other having hydrophobic material on its surface, and means for independently actuating said lancing medium and said transport medium, said means adapted to move said droplet of bodily fluid retained by said transport medium away from said skin-piercing end as said transport medium moves away from said skin-piercing end. - View Dependent Claims (34, 35, 36, 37)
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38. Apparatus for sampling bodily fluids comprising:
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an elongated lancing medium having a skin piercing end, said skin piercing end adapted to be displaced against a skin site for making an incision, a fluid retaining member separated from said lancing medium to define a gap between said fluid retaining member and said elongated lancing medium, wherein said fluid retaining member and said lancing medium are adapted to retain bodily fluid from the incision in the gap by capillary action, a test medium attached to said lancing medium and said transport medium, said test medium adapted to determine the concentration of an analyte in a droplet of bodily fluid, and a mechanism for independently activating said lancing medium and said transport medium, said mechanism adapted to move a droplet of bodily fluid away from said skin site and to said test medium while being retained between said fluid retaining member and said elongated lancing medium. - View Dependent Claims (39, 40, 41, 42, 43)
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44. Apparatus for sampling bodily fluid from the skin comprising:
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a lancet for forming an incision in the skin; a test strip for analyzing bodily fluid from the incision; a sheath adjacent the lancet with a semicircular disk extending toward the lancet, the semicircular disk including a fluid retention surface facing the lancet, the fluid retention surface adapted to retain a drop of bodily fluid adjacent the fluid retention surface and between the fluid retention surface and the lancet by capillary action, and a side surface adjacent the fluid retention surface, the side surface adapted to inhibit retention of bodily fluid by capillary action between the side surface and the lancet; and a sheath actuator configured to displace the fluid retention surface from a first position adjacent the skin surface, the fluid retention surface being configured in the first position to capture the discrete drop of bodily fluid from the incision between the lancet and the fluid retention surface, to a second position adjacent the test strip, the fluid retention surface being configured in the second position to retain the drop of fluid away from the incision and place the drop of retained fluid in contact with the test strip. - View Dependent Claims (45, 46, 47, 48, 49)
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Specification