초록 ▼

A programmer for a pacemaker which has telemetric capabilities is disclosed. The programmer, in addition to being able to program the pacemaker through telemetric transmission of programming codes can receive digital and analog (including marker) information from the pacemaker for remote display and

A programmer for a pacemaker which has telemetric capabilities is disclosed. The programmer, in addition to being able to program the pacemaker through telemetric transmission of programming codes can receive digital and analog (including marker) information from the pacemaker for remote display and utilization, and for program modification in response thereto, if desired. Implementation of the programmer is accomplished partly by circuitry which includes pulse duration measurement circuitry for measuring time duration intervals of incoming RF telemetric signals and partly by a firmware program stored in the programmer.

대표청구항 ▼

1. A method of operating a programmer for use in telemetric programming of implantable cardiac pulse generators which produce pulse-interval-modulated output signals consisting of bursts of radio frequency energy wherein a first relatively long time interval between two bursts represents a digital l

1. A method of operating a programmer for use in telemetric programming of implantable cardiac pulse generators which produce pulse-interval-modulated output signals consisting of bursts of radio frequency energy wherein a first relatively long time interval between two bursts represents a digital logic signal of a first value and a relatively short time interval between two bursts represents a digital logic signal of a second value, said first and second time intervals being variable from pulse generator to pulse generator such that the relatively short time interval associated with one pulse generator may exceed the relatively long time interval associated with another pulse generator, wherein said pulse generator telemetrically transmits a calibration signal train comprising a predetermined number of bursts having a pattern of relatively short and relatively long time intervals therebetween to said programmer, comprising: (a) measuring each of said short and long time intervals between said bursts of said signal train in succession; (b) establishing a control interval associated with each time interval measurement which allows for the measurement of the next time interval after the previous time interval measurement has been stored; (c) storing each of said measurements during the associated control interval; (d) validating said signal train only if all of said measured time intervals are greater than a predetermined minimum time interval and are less than a predetermined maximum time interval; (e) determining from said measurements short and long time window intervals for the pulse generator being programmed; (f) verifying that said signal train is valid only if said short time window interval and said long time window interval are separated by a predetermined minimum time interval value; and, (g) decoding telemetric messages thereafter transmitted from said pulse generator after said signal train is both validated and verified.