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Subcutaneous injection system

  • US 4,235,234 A
  • Filed: 11/30/1978
  • Issued: 11/25/1980
  • Est. Priority Date: 11/30/1978
  • Status: Expired due to Term
First Claim
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1. An injection needle assembly connectable to the tubing from a fluid supply source for injecting fluids into the subcutaneous fat layer of a patient below the skin without penetrating the muscle tissue comprising:

  • an elongate injection needle defining a fluid passage therethrough, said injection needle having an inlet end to be connected to the tubing from the fluid supply soure and a sharpened outlet end opposite the inlet end adapted to puncture the patient'"'"'s skin and subcutaneous fat layer, said needle defining a right angle bend therein forming a locating section on said needle adjacent the inlet end thereof and a penetrating section on said needle adjaclent the sharpened outlet end thereof oriented normal to said locating section;

    a locator pad having opposed top and bottom surfaces, said bottom surface adapted to lie against the patient'"'"'s skin; and

    a needle mount integral with said locator pad on the top surface thereof, said needle mount enclosing said locating section and said right angle bend of said needle so that said locating section of said needle lies along said top surface of said locator pad generally parallel to said bottom surface and said inlet end of said needle projecting from said needle mount parallel to said bottom surface for connection to the tubing, said penetrating section of said needle extending through said locator pad and projecting from said bottom surface, said needle mount and said locator pad maintaining said needle fixed with respect to said bottom surface and said penetrating section fixed normal to said bottom surface with said sharpened outlet and located a prescribed distance from said surface to positively control the depth of penetration of said sharpened outlet end of said needle into the subcutaneous fat layer of the patient when said bottom surface is in juxtaposition with the patient'"'"'s skin.

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