Compressed storage of data in cardiac pacemakers
First Claim
1. In a medical device encased in a housing and adapted for implantation within a patient'"'"'s body having a monitoring system for recording electrical signals, said electrical signals having a level which varies over time as a function of a physiologic parameter of said patient, said monitoring system including means for sensing said electrical signal levels and means for periodically sampling said electrical signal at a periodic sample rate having predetermined intervals, the improvement comprising;
- means for defining an analog voltage level indicative of said electrical signals, means for storing said analog voltage level, means for durably maintaining said analog voltage level and means for retrieving said voltage level.
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Accused Products
Abstract
An implantable medical device for human implant. The device includes a telemetry transmitter and receiver for communicating information from the implanted device to an external programmer or monitor and for receiving commands or other information from an external programmer. The device is provided with one or more sensors and means for monitoring, recording and storing the recordings of physiologic signals after implant. The device is provided with a waveform compression and storage system which stores monitored signals in the form of defined analog voltages maintained within the device, rather than employing more traditional digital storage techniques.
251 Citations
19 Claims
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1. In a medical device encased in a housing and adapted for implantation within a patient'"'"'s body having a monitoring system for recording electrical signals, said electrical signals having a level which varies over time as a function of a physiologic parameter of said patient, said monitoring system including means for sensing said electrical signal levels and means for periodically sampling said electrical signal at a periodic sample rate having predetermined intervals, the improvement comprising;
means for defining an analog voltage level indicative of said electrical signals, means for storing said analog voltage level, means for durably maintaining said analog voltage level and means for retrieving said voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
Specification