×

Method and apparatus for implementing histogram storage and trend analysis in a medical stimulator

  • US 5,088,488 A
  • Filed: 12/22/1989
  • Issued: 02/18/1992
  • Est. Priority Date: 12/22/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. In an implantable device of the type comprising means for repeatedly measuring one of more predetermined parameters and memory means for storing information related to the measurements of said parameter for later transmission to an external monitoring device, the improvement wherein:

  • said measuring means comprises means for providing digital codes indicative of the measurements of said one or more parameters;

    wherein said memory means comprises a random access memory capable of storing data at a plurality of addresses, means for initializing said random access memory such that the data at each of said addresses of said random access memory is set to a predetermined value, and memory addressing means for addressing said random access memory and altering the data stored therein; and

    wherein said memory addressing means operates in first and second alternative modes, such that in said first mode said addressing means sequentially addresses said addresses of said random access memory and sequentially stores said digital codes at successive ones of said addresses within said random access memory and such that in said second mode, said addressing means employs said digital codes to address said addresses of said random access memory, and with each said addressing of said random access memory incremented the value in said random access memory at the one of said addresses corresponding to the said digital code used to address said random access memory.

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