# US 2014/0155958 A1 · Adaptive event storage in implantable device

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- Number: US 2014/0155958 A1
- Document ID: US20140155958A1
- Status: Published application
- Kind: A1
- Application number: 14/173,111
- Filed: 2014-02-05
- Published: 2014-06-05
- Earliest claimed: 2009-05-27
- Assignees: Cardiac Pacemakers, Inc.
- Applicants: Cardiac Pacemakers, Inc.
- Inventors: Yanting Dong; David L. Perschbacher; Jeffrey E. Stahmann; Dan Li; Deepa Mahajan
- Web page: https://patentgrep.com/patent/US20140155958A1

## CPC

- A61N 1/025: {Digital circuitry features of electrotherapy devices, e.g. memory, clocks, processors}
- A61B 5/349: Detecting specific parameters of the electrocardiograph cycle
- A61B 5/6846: {specially adapted to be brought in contact with an internal body part, i.e. invasive}
- A61N 1/3621: {for treating or preventing abnormally high heart rate}
- A61N 1/3702: {Physiological parameters (A61N1/365 takes precedence; evoked response A61N1/371)}
- A61N 1/372: Arrangements in connection with the implantation of stimulators
- A61N 1/37252: {Details of algorithms or data aspects of communication system, e.g. handshaking, transmitting specific data or segmenting data}
- A61N 1/3925: {Monitoring; Protecting}
- A61B 5/02: Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

Monitoring physiological parameter using an implantable physiological monitor in order to detect a condition predictive of a possible future pathological episode and collecting additional physiological data associated with the condition predictive of a possible future pathological episode. Monitoring another physiological parameter in order to detect a condition indicative of the beginning of a present pathological episode and collecting additional pathological data in response to the condition. Determining that the condition predictive of a future episode and the condition indicative of a present episode are associated and, in response thereto, storing all the collected physiological data.

## Claims

### Claim 1

(canceled)

### Claim 2

A system, comprising:
an implantable physiological data monitor, configured to monitor one or more physiological data parameters;
a processor, coupled to the implantable physiological data monitor, the processor configured to,
detect an episode beginning condition using a first physiological data parameter monitored by the implantable physiological data monitor, wherein the episode beginning condition is indicative of beginning of a present pathological episode; and
detect an episode ending condition monitored by the implantable physiological data monitor, wherein the episode ending condition is indicative of the ending of the present pathological episode;
a rolling memory buffer configured to continually store a fixed segment of a second physiological data parameter monitored by the implantable physiological data monitor;
a static memory buffer configured to store a time segment of a third physiological data parameter monitored by the implantable physiological data monitor based on a triggering event associated with the detecting of the episode ending condition; and
a memory configured to store data retained in the static memory buffer and associate the data retained in the static memory with the data retained in the rolling memory buffer for later use by the processor or for output to an external device.

### Claim 3 (depends on 2)

The system of claim 2, wherein the processor is configured to detect the episode ending condition at least in part by determining that an implantable medical device has delivered a therapy.

### Claim 4 (depends on 2)

The system of claim 2, wherein the therapy includes delivery of electrostimulation.

### Claim 5 (depends on 2)

The system of claim 2, wherein the triggering event includes a specified delay after a time the episode ending condition is detected.

### Claim 6 (depends on 2)

The system of claim 2, wherein detecting the episode ending condition includes using a fourth physiological data parameter monitored by the implantable physiological data monitor.

### Claim 7 (depends on 6)

The system of claim 6, wherein the episode ending condition is detected when one or more of the first, second, third, and fourth monitored physiological parameters meet a specified test.

### Claim 8 (depends on 6)

The system of claim 6, wherein the first physiological data parameter and the fourth physiological data parameter represent same physiological characteristics, the same physiological characteristics including the same at least one of heart rate, electrogram morphology, blood pressure, blood gas, blood chemistry, respiration rate, atrial versus ventricular heart rate, or heart rate stability.

### Claim 9 (depends on 2)

The system of claim 2, wherein at least two of the first, second, and third physiological data parameters represent same physiological characteristics.

### Claim 10 (depends on 2)

The system of claim 2, wherein at least two of the first, second, and third physiological data parameters represent different physiological characteristics.

### Claim 11 (depends on 2)

The system of claim 2, wherein the implantable physiological data monitor includes one or more of: an electrocardiogram sensor, a heart rate sensor, a heart sounds sensor, a pressure sensor, a blood gas sensor, an electroneurogram sensor, a posture sensor, a respiratory sensor, or a chemical sensor.

### Claim 12

A method, comprising:
monitoring first physiological data using an implantable physiological monitor,
using the first physiological data, detecting an episode beginning condition indicative of a beginning of a present pathological episode;
responding to detecting the episode beginning condition by collecting second physiological data associated with the detecting the episode beginning condition;
detecting an episode ending condition indicative of the ending of the present pathological episode;
responding to detecting the episode ending condition by collecting third physiological data associated with the detecting of the episode ending condition.

### Claim 13 (depends on 12)

The method of claim 12, wherein detecting the episode ending condition includes detecting the episode ending when an implantable cardiac rhythm management device has delivered a therapy.

### Claim 14 (depends on 13)

The method of claim 13, wherein the therapy includes delivery of electrostimulation.

### Claim 15 (depends on 12)

The method of claim 12, wherein collecting the third physiological data is triggered after a specified delay beyond a time the episode ending condition.

### Claim 16 (depends on 12)

The method of claim 12, comprising monitoring fourth physiological data using the implantable physiological monitor.

### Claim 17 (depends on 16)

The method of claim 16, wherein the episode ending condition is detected when the monitored fourth physiological data meets a test.

### Claim 18 (depends on 17)

The method of claim 17, wherein the episode ending condition is detected when one or more of the first, second, third, and fourth monitored physiological data meet a test.

### Claim 19 (depends on 16)

The method of claim 16, wherein at least the first and the fourth physiological data represent same physiological characteristics, the same physiological characteristics including the same at least one of heart rate, electrogram morphology, blood pressure, blood gas, blood chemistry, respiration rate, atrial versus ventricular heart rate, or heart rate stability.

### Claim 20 (depends on 12)

The method of claim 12, wherein at least two of the first, second, and third physiological data represent the same physiological characteristic.

### Claim 21 (depends on 12)

The method of claim 12, wherein at least two of the first, second, and third physiological data represent a different physiological characteristic.