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Blood transfer assembly

  • US 4,765,344 A
  • Filed: 10/06/1986
  • Issued: 08/23/1988
  • Est. Priority Date: 04/06/1984
  • Status: Expired due to Term
First Claim
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1. Apparatus for forming a blood droplet of a controlled, generally uniform size from a finger which has been pricked to draw blood and for positioning said droplet for analysis of a medically significant component thereof, the apparatus comprising means providing a first surface across which blood may flow under the influence of gravity, the first surface including a first vertically lower edge terminating at a point, the first surface including a second vertically upper edge across which a finger may be drawn to deposit blood on the first surface and means providing a second surface onto which a droplet of blood may be deposited, the second surface disposed beneath the point to receive the droplet after it is formed, said droplet being formed from the blood as it flows across the first surface toward the point, and, owing to gravity and the surface tension of the blood, develops at the point into the substantially uniformly sized droplet which falls into position on the second surface, the second surface comprising a reagent for reacting with a medically significant component of the blood to produce a visual indication of the concentration of the component in the blood.

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