US4601291A — Biomedical system with improved marker channel me…

Claim 1

Independent Claim 134 words

A pacemaker system comprising an implantable dual chamber pacemaker having means for sensing atrial and ventricular events and means for timing atrial and ventricular pacemaker operation, and external apparatus for storing data and displaying data, characterized by said pacemaker having output means for cyclically outputting event and pacemaker timing data representative of a prior pacemaker interval; said external apparatus having means for receiving and storing said outputted data in storage; and graphic constructing means for constructing from said stored data a dual channel graphic output representative of both atrial and ventricular pacemaker timing and events for a plurality of pacemaker cycles, said graphic constructing means further comprising linear print means for printing linear symbols respectively representative of different sensing conditions, said linear symbols having lengths representative of the time durations of said sensing conditions.

Claim 2

Dependent Claim 134 words

A pacemaker system comprising an implantable dual chamber pacemaker having means for sensing atrial and ventricular events and means for timing atrial and ventricular pacemaker operation, and external apparatus for storing data and displaying data, characterized by said pacemaker having output means for cyclically outputting event and pacemaker timing data representative of a prior pacemaker interval; said external apparatus having means for receiving and storing said outputted data in storage; and graphic constructing means for constructing from said stored data a dual channel graphic output representative of both atrial and ventricular pacemaker timing and events for a plurality of pacemaker cycles, said graphic constructing means further comprising linear print means for printing linear symbols respectively representative of different sensing conditions, said linear symbols having lengths representative of the time durations of said sensing conditions.

Claim 3

Dependent Claim 44 words

The system as described in claim 1, wherein said output means operates each pacemaker cycle to output a plurality of bytes representing said timing and event data, said plurality of bytes being outputted substantially immediately following a predetermined event which terminates the preceding cycle.

Claim 4

Dependent Claim 22 words

The system as described in claim 2, wherein said output means comprises means for outputting event data representative of ventricular sense occurrences.

Claim 5

Dependent Claim 30 words

The system as described in claim 1, further comprising event symbol means for outputting symbols indicative of events and for positioning said symbols in time relationship to said linear symbols.

Claim 6

Dependent Claim 41 words

The system as described in claim 4, wherein said event symbol means comprises means for graphing symbols representative of A sense, V sense, A pace, V pace, double sense, and inhibition of synchronized V stimulus following an atrial sense or pace.

Claim 7

Dependent Claim 28 words

The system as described in claim 4, wherein said linear print means comprises means for printing linear symbols representative of atrial no sensing, relative sensing and absolute sensing.

Claim 8

Dependent Claim 32 words

The system as described in claim 1, wherein said graphic constructing means comprises means for generating additional timing data by timing the interval between each successive transmission of said plurality of bytes.

Claim 9

Dependent Claim 41 words

The system as described in claim 1, wherein said constructing means comprises storage means for storing said timing and event data continuously from cycle to cycle, and means for printing a predetermined plurality of cycles in graphic form upon operator demand.

Claim 10

Dependent Claim 27 words

The system as described in claim 8, wherein said storage means comprises means for continuously storing groups of data corresponding to the n most recent pacemaker cycles.

Claim 11

Independent Claim 137 words

A method for generating a graphic marker channel representative of event and timing data corresponding to operation of an implanted cyclically operating device, said graphic marker channel being presented on at least one time axis, comprising cyclically outputting event and timing data representative of a prior device cycle, each said outputting comprising transmitting a group of data bytes corresponding to said prior device cycle; storing consecutive groups of bytes in external storage, each group representative of event and timing data outputted just after completion of a device interval; and constructing a graphic marker channel representation of a plurality of device cycles, said graphic representation being derived from said groups of bytes and including line symbols printed along said time axis, each said line symbol being representative of the time duration of an operating condition of said device.

Claim 12

Independent Claim 137 words

A method for generating a graphic marker channel representative of event and timing data corresponding to operation of an implanted cyclically operating device, said graphic marker channel being presented on at least one time axis, comprising cyclically outputting event and timing data representative of a prior device cycle, each said outputting comprising transmitting a group of data bytes corresponding to said prior device cycle; storing consecutive groups of bytes in external storage, each group representative of event and timing data outputted just after completion of a device interval; and constructing a graphic marker channel representation of a plurality of device cycles, said graphic representation being derived from said groups of bytes and including line symbols printed along said time axis, each said line symbol being representative of the time duration of an operating condition of said device.

Claim 13

Dependent Claim 28 words

The method as described in claim 10, wherein said device is a pacemaker, and comprising outputting a group of bytes following a selected occurrence of each pacemaker cycle.

Claim 14

Dependent Claim 38 words

The method as described in claim 10, wherein said device comprises a pacemaker, and wherein said step of constructing a graphic marker channel representation comprises producing said line symbols representative of the timing of the pacemaker refractory interval.

Claim 15

Dependent Claim 37 words

The method as described in claim 10, wherein said device comprises a dual chamber pacemaker, and comprising constructing atrial and ventricular marker channel graphic outputs, at least one of said channel outputs comprising refractory interval line symbols.

Claim 16

Dependent Claim 107 words

A pacemaker system comprising a pacemaker and external apparatus, the pacemaker and external apparatus having means for communicating therebetween, characterized by said pacemaker having means for transmitting event and pacemaker timing data to said external apparatus, and said external apparatus having linear graphic means for generating a continuous linear graphic timing display of pacemaker operation over a plurality of cycles, said linear display including line symbols having lengths representative of the time durations of pacemaker operating conditions, and symbol means for generating graphic symbols representative of events and for positioning said graphic symbols relative to said linear timing display in correspondence with the timing of said events.

Claim 17

Dependent Claim 107 words

A pacemaker system comprising a pacemaker and external apparatus, the pacemaker and external apparatus having means for communicating therebetween, characterized by said pacemaker having means for transmitting event and pacemaker timing data to said external apparatus, and said external apparatus having linear graphic means for generating a continuous linear graphic timing display of pacemaker operation over a plurality of cycles, said linear display including line symbols having lengths representative of the time durations of pacemaker operating conditions, and symbol means for generating graphic symbols representative of events and for positioning said graphic symbols relative to said linear timing display in correspondence with the timing of said events.

Claim 18

Dependent Claim 48 words

The pacemaker system as described in claim 14, wherein said pacemaker comprises programmable mode means for selectively operating in a single chamber or dual chamber mode, and said linear graphic means has dual means for generating a linear graphic display corresponding to both atrial and ventricular pacemaker operation.

Claim 19

Dependent Claim 33 words

The pacemaker system as described in claim 14, wherein said pacemaker has means for collecting event and timing data each cycle and for transmitting said data in batch form following said each cycle.

Claim 20

Independent Claim 103 words

A method for generating a linear graphic marker channel output representative of event and timing data corresponding to operation of an implanted cyclically operating pacemaker, said method being carried out by a pacemaker system including said implanted pacemaker and external apparatus, comprising transmitting event and pacemaker timing data from said pacemaker to said external apparatus, receiving said data at said external apparatus and generating a linear graphic timing display of the operation of said pacemaker over a plurality of cycles, said generating step including utilizing said received data and printing lines having lengths representative of periods of time of operation of said pacemaker.

Claim 21

Independent Claim 103 words

A method for generating a linear graphic marker channel output representative of event and timing data corresponding to operation of an implanted cyclically operating pacemaker, said method being carried out by a pacemaker system including said implanted pacemaker and external apparatus, comprising transmitting event and pacemaker timing data from said pacemaker to said external apparatus, receiving said data at said external apparatus and generating a linear graphic timing display of the operation of said pacemaker over a plurality of cycles, said generating step including utilizing said received data and printing lines having lengths representative of periods of time of operation of said pacemaker.

Claim 22

Dependent Claim 64 words

The method as described in claim 17, wherein said generating comprises printing said timing display to represent events and pacemaker timing with respect to a time scale, and printing respective different line symbols representative of a plurality of respective identifiable portions of refractory intervals of said pacemaker, said line symbols having lengths with respect to said time scale representing the durations of said portions.

Claim 23

Dependent Claim 18 words

The method as described in claim 18, comprising printed evoked QRS response with respect to said time scale.

Claim 24

Dependent Claim 18 words

The method described in claim 18, wherein said generating step comprises generating solid lines representing absolute refractory periods.

Claim 25

Dependent Claim 20 words

The method as described in claim 17, wherein said generating step comprises printing closed linear extensions representing relative refractory periods.

Claim 26

Dependent Claim 36 words

The method as described in claim 17, comprising generating graphic symbols representative of said sensed events and positioning said graphic symbols relative to said linear graphic timing display in correspondence with the timing of said events.

Claim 27

Dependent Claim 30 words

The method as described in claim 17, wherein said step of printing lines includes printing linear refractory interval timing diagrams presenting continuous information concerning a sense condition in said pacemaker.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-07-21	1990-01-20	1990-07-22	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-07-21	1994-01-20	1994-07-22	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-07-21	1998-01-20	1998-07-22	$7700.00	Window Closed / Lapsed

Biomedical system with improved marker channel means and method

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