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Radiation safety shield for a syringe

  • US 3,973,554 A
  • Filed: 04/24/1975
  • Issued: 08/10/1976
  • Est. Priority Date: 04/24/1975
  • Status: Expired due to Term
First Claim
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1. A radiation safety apparatus for use with a syringe for containing a radioactive liquid, comprising:

  • a cylindrical sheath for encircling the distal end of a syringe;

    a retractable cylindrical shield for encircling the proximal end of the syringe and constructed of a material capable of attenuating significant amounts of radiation from a radioactive source, said shield being coaxial with said sheath and being capable of retracting into said sheath; and

    means to couple said shield and said sheath coaxially together and to permit said shield to telescope into said sheath while being frictionally maintained in axial position relative to said sheath;

    wherein said shield is extensible over the proximal end of the syringe to ensure that radioactive rays do not escape when the syringe contains a radioactive serum, but whereby said shield can be retracted within said sheath to allow for assaying of a radioactive substance.

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