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METHOD AND APPARATUS FOR INJECTING CONTRAST MEDIA INTO THE VASCULAR SYSTEM

  • US 3,812,843 A
  • Filed: 03/12/1973
  • Issued: 05/28/1974
  • Est. Priority Date: 03/12/1973
  • Status: Expired due to Term
First Claim
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1. Injection apparatus for injecting a fluid into the vascular system of a mammal comprising a syringe assembly including a syringe barrel containing a piston, means mounting said piston for axial movement within said syringe barrel for expelling said fluid therefrom, and control means for controlling the rate of speed of advance movement of said piston within said syringe barrel, said control means comprising means for independently preselecting more than one rate of speed of advance movement of said piston within said syringe barrel and the periods of times of duration of each advancement prior to such advancement, and means for sequentially advancing said piston at such preselected rates of speed for such preselected periods of time during such advancement of said piston.

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