BLOOD AND INTERSTITIAL FLUID SAMPLING DEVICE
First Claim
1. An apparatus for obtaining a sample of body fluid, comprising:
- a skin piercing member; and
a drive mechanism connected to the skin piercing member;
wherein the drive mechanism is adapted to extend the skin piercing member to a point of maximum penetration beneath a skin surface and withdraw the skin piercing member from the point of maximum penetration while maintaining the skin piercing member beneath the skin surface to create an opening in which body fluid can pool.
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Accused Products
Abstract
A device and method for lancing a patient, virtually simultaneously producing and collecting a small fluid sample from a body. The device comprises a blood collection system including a lancing needle, drive mechanism, kneading or vibration mechanism, optional suction system, and sample ejection mechanism. The device is preferably sized to be hand-held in one hand and operable with one hand. The device can optionally contain integral testing or analysis component for receiving the sample and providing testing or analysis indication or readout for the user. In one configuration, the lancing needle may be withdrawn very slightly from the point of maximum penetration to create an opening in which blood can pool before being suctioned through to device.
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Citations
20 Claims
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1. An apparatus for obtaining a sample of body fluid, comprising:
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a skin piercing member; and a drive mechanism connected to the skin piercing member; wherein the drive mechanism is adapted to extend the skin piercing member to a point of maximum penetration beneath a skin surface and withdraw the skin piercing member from the point of maximum penetration while maintaining the skin piercing member beneath the skin surface to create an opening in which body fluid can pool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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extending a skin piercing member of a fluid sampling device to a point of maximum penetration beneath a skin surface with a drive mechanism; and withdrawing the skin piercing member from the point of maximum penetration with the drive mechanism while maintaining the skin piercing member beneath the skin surface and forming an opening between the skin piercing member and the skin in which body fluid can pool. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An apparatus, comprising:
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a reusable fluid sampling device including a drive mechanism; and a disposable member detachably mounted to the drive mechanism and adapted to be replaced after use, the disposable member including a skin piercing member with a fluid passageway, the skin piercing member being adapted to penetrate a skin surface; wherein the drive mechanism extends the skin piercing member to a point of maximum penetration beneath the skin surface and, while maintaining the skin piercing member in the wound, pulls the skin piercing member back to permit body fluid accumulation; and wherein the fluid passageway is adapted to draw fluid from the accumulated body fluid.
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- 17. The apparatus of claim 17, wherein the point of maximum penetration is at a depth of 0.3 to 0.6 millimeters below the skin surface.
- 19. The apparatus of claim 19, wherein the suction mechanism includes a syringe with a plunger.
Specification