The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1987
Filed:
Sep. 19, 1985
Kornelis A Mensink, Brummen, NL;
Hendrik L Brouwer, Dieren, NL;
Vitafin N.V., Curacao, AN;
Abstract
A device such as a cardiac pacemaker or other implantable biomedical device, and method of operation thereof, containing one or more switchable circuits. A control system, preferably incorporating a microprocessor, controls predetermined changes of the operating characteristics of the switchable circuits. In a cardiac pacer embodiment, a circuit such as the input amplifier can be switched to have different characteristics, e.g. filter setting and sensitivity, during predetermined portions of the pacer cycle. Further, the operation of a circuit can be monitored over a plurality of operating cycles, with controlled switching of the circuit characteristics as a function of cumulative monitored circuit performance. A specific example of the invention is shown for changing characteristics of a filter circuit used in a pacer which adjusts the pacer rate as a function of determined stimulus-T wave time interval.