×

Hardware/software lock secure linkage between algorithmic decision process and critical system function execution

  • US 6,612,994 B2
  • Filed: 03/08/2001
  • Issued: 09/02/2003
  • Est. Priority Date: 03/08/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system, comprising:

  • at least one electrode disposed around a heart to sense cardiac signals and to deliver a high-energy electrical therapy to the heart;

    a signal sensing circuit coupled to the at least one electrode to receive and amplify the sensed cardiac signals;

    a therapy circuit coupled to the at least one electrode to deliver the high-energy electrical therapy to the heart;

    a controller coupled to the signal sensing and the therapy circuits, the controller further comprises;

    an analyzer coupled to the sensing circuit to receive sensed cardiac signals and analyze the cardiac signals for the presence of a cardiac arrhythmia, and issue a request to start delivering the high-energy electrical therapy based on an outcome of the analysis;

    a first processor coupled to the analyzer, the first processor to receive the request to start delivering the high-energy electrical therapy from the analyzer;

    an interprocess token coupled to the first processor, wherein the first processor sets an interprocess token upon receiving the request to start delivering the high-energy electrical therapy;

    a second processor coupled to the first processor, the second processor to receive a first message from the first processor about running an algorithm to verify a legitimacy of the received request to start delivering the high-energy electrical therapy, wherein the second processor stores the first message, wherein the first processor starts the algorithm to verify the legitimacy of the request to start delivering the high-energy electrical therapy and sends a second message comprising an outcome of the verification to the second processor, and wherein the second processor enables the start of delivering the high-energy electrical therapy by the first processor based on the outcome of the verification; and

    a hardware/software lock coupled to the first processor, wherein the first processor unlocks the hardware/software lock to start delivering the high-energy electrical therapy upon enabling by the second processor and further based on the status of the setting of the interprocess token.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×