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Hazardous agent injection system

  • US 9,750,881 B2
  • Filed: 08/22/2016
  • Issued: 09/05/2017
  • Est. Priority Date: 03/20/2009
  • Status: Active Grant
First Claim
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1. A hazardous agent injection system comprising:

  • methotrexate in an amount of about 0.02 ml to about 4.0 ml and at a concentration of about 7.5 mg/ml to about 150 mg/ml;

    a powered injector comprising;

    a container containing the methotrexate;

    an injection outlet member fluidly coupled with the container and configured to deliver the methotrexate to a patient subcutaneously;

    a firing mechanism coupled to the container and configured to expel the methotrexate from the container through the injection outlet member for injecting the methotrexate;

    an energy source coupled to the firing mechanism and configured to power the firing mechanism; and

    a trigger mechanism coupled to the firing mechanism and configured to activate the firing mechanism,wherein the powered injector is configured to eject the methotrexate from the injection outlet member such that one or more of confidence intervals of (a) the maximum concentration of methotrexate in blood plasma of the patient following administration of a dose of the methotrexate to the patient with the hazardous agent injection system, (b) the time to reach the maximum concentration of methotrexate in blood plasma of the patient following administration of a dose of the methotrexate to the patient with the hazardous agent injection system and (c) area under a curve of a concentration of methotrexate in blood plasma of the patient following administration of a dose of the methotrexate to the patient with the hazardous agent injection system falls between about 80% and about 125% of a measured confidence interval of an equivalent dose of methotrexate delivered by a hand-powered syringe, andwherein the powered injector is configured to subcutaneously inject the methotrexate at a pressure of at least about 80 psi.

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