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Device for automatic injection of radionuclide

  • US 5,472,403 A
  • Filed: 05/11/1993
  • Issued: 12/05/1995
  • Est. Priority Date: 05/11/1993
  • Status: Expired due to Fees
First Claim
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1. A device for facilitating use of ictal single photon emission computed tomography for localizing seizure focus in a patient comprising:

  • a first syringe for retaining a first quantity of a radionuclide;

    a first activation means for causing said first syringe to inject said radionuclide;

    a second syringe for injecting a saline solution;

    a second activation means for causing said second syringe to inject said saline solution;

    tubing for delivering fluids to said patient intravenously;

    a "Y" connector having a first input and a second input connected to said first syringe and said second syringe respectively and an output connected to said tubing for directing said radionuclide and said saline solution into said tubing;

    a plurality of trigger means, each trigger means for providing a trigger signal indicative of occurrence of a seizure; and

    a computer means for receiving said trigger signal, introducing a verification delay for verifying said occurrence of a seizure, calculating a second quantity of said radionuclide less than or equal to said first quantity of said radionuclide based upon a time delay between a filling of said first syringe and said occurrence of a seizure and a half-life of said radionuclide, providing an inject signal to said first activation means to inject said second quantity and providing a flush signal to said second activation means to inject said saline solution to flush said tubing;

    wherein said radionuclide is injected within a critical period following said occurrence of a seizure to permit localization of the seizure focus in said patient'"'"'s brain using ictal single photon emission computed tomography.

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