×

Blood extraction assist apparatus and method

  • US 4,883,462 A
  • Filed: 01/30/1987
  • Issued: 11/28/1989
  • Est. Priority Date: 01/30/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. Blood extraction assist apparatus for facilitating sustained venous blood flow through a human limb towards a venous blood extraction point, said apparatus comprising:

  • blood processing apparatus having (a) a phlebotomy needle for fluid connection with a vein in a limb of a living body, (b) pressurizable cuff for surrounding an upper portion of said limb above a needle connection to said limb so as to substantially restrict venous blood flow while permitting arterial blood flow to continue therepast toward a lower portion of said limb where the needle connection point is located;

    limb stimulus means adapted for tactile engagement with a lower portion of said limb distal to said needle connection point when activated;

    control means coupled to said limb stimulus means for selectively activating said limb stimulus means for extracting and processing blood via said needle, at a time when blood flow assistance forces toward said needle connection is desired and deactivating said limb stimulus means at a time when blood flow assistance forces toward said needle connection is not desired.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×