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Dialysis needle

  • US 4,585,446 A
  • Filed: 03/16/1984
  • Issued: 04/29/1986
  • Est. Priority Date: 03/16/1984
  • Status: Expired due to Fees
First Claim
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1. A dialysis needle or the like comprising:

  • a tube with a wall having a bore extending therethrough;

    a razor-edged cutting blade extending transversely across the forward end of said tube, said blade having a generally "V" shape with a pair of razor-sharp cutting edges diverging rearwardly from a centrally-located needle-sharp point to opposite sides of the tube;

    a pair of transversely-opposed smooth, tissue-spreading ribs located between the cutting edges and diverging rearwardly from said point to opposite sides of the tube;

    forwardly open openings between the cutting edges and tissue-spreading ribs providing fluid flow passages extending rearwardly from the point to the rear ends of the ribs and communicating with said bore andthe transverse widths across the cutting edges and across the ribs progressively increasing from the point rearwardly at different rates to enable coincidental incising and spreading of tissue without pulling the ends of the incision apart and taut against the cutting edges.

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