Syncing multiple sources of physiological data

Patent metadata

Field	Value
Publication number	US-2017196457-A1
Application number	US-201715400995-A
Country	US
Kind code	A1
Filing date	Jan 7, 2017
Priority date	Jan 8, 2016
Publication date	Jul 13, 2017
Grant date	—

Abstract

A system includes an implantable medical device configured to sense a sync signal and sense physiological parameters to obtain a physiological signal. In response to sensing the sync signal, the implantable medical device is configured to generate a sync-stamped physiological signal. In certain embodiments, a method includes receiving a first physiological signal coupled with a sync signal; receiving a second physiological signal coupled with the sync signal; and, using the sync signal, synchronizing in time the first and second physiological signals.

First claim

We claim:

1 . A system comprising:
a sync signal source configured to direct a sync signal towards a first and second medical device; the first medical device configured to sense the sync signal and a first set of physiological parameter measurements and generate a sync-coupled first physiologic signal; the second medical device configured to sense the sync signal and a second set of physiological parameter measurements and generate a sync-coupled second physiologic signal; and circuitry configured to align, in time, the first and second sync-coupled physiological signals.

2 . The system of claim 1 , wherein the sync signal includes a predetermined series of pulses of current.

3 . The system of claim 2 , further comprising:
electrodes configured to generate the sync signal.

4 . The system of claim 1 , wherein the sync signal includes a series of predetermined vibration pulses.

5 . The system of claim 1 , wherein at least one of the first and second medical devices is an implantable medical device.

6 . The system of claim 1 , wherein the first medical device is an implantable medical device, and wherein the second medical device is a wearable medical device.

7 . The system of claim 1 , wherein at least one of the first medical device and an external server includes the circuitry.

8 . A method for use with a medical device, the method comprising:
sensing, by the medical device, a sync signal; sensing, by the medical device, a first set of physiological parameter measurements; and in response to sensing the sync signal and first physiological set of physiological parameter measurements, generating a sync-coupled physiological signal.

9 . The method of claim 8 , further comprising:
receiving, by a sensor recording system, a second physiological signal generated by a sensor external to the medical device; receiving, by the sensor recording system, the sync signal; and synchronizing, in time, the first and second physiological sets of physiological measurements.

10 . The method of claim 8 , wherein the medical device includes at least one channel that senses the sync signal, the at least one channel comprising at least one of an intrathoracic impedance sense channel, a left ventricle lead channel, and an evoked response channel.

11 . The method of claim 10 , wherein electrodes direct the sync signal to the medical device.

12 . The method of claim 10 , further comprising:
sensing, by an additional medical device external to the medical device, a second set of physiological parameter measurements, and the sync signal; and synchronizing, in time, the first and second sets of physiological parameter measurements.

13 . The method of claim 10 , wherein the sync signal includes a predetermined series of pulses of current.

14 . The method of claim 10 , wherein the sync signal includes a series of predetermined vibration pulses.

15 . The method of claim 9 , wherein the first physiological signal comprises a first data stream sampled from a first original signal at a first sampling rate, and the second physiological signal comprises a second data stream sampled from a second original signal at a second sampling rate, the first and second sampling rates being different, and the method further comprising:
resampling at least one of the first and second data stream at a third sampling rate, wherein the third sampling rate is selected such that respective pulses of the sync signal span the same number of samples in the first data stream as in the second data stream; and aligning the first and second data stream by shifting the first data stream with respect to the second data stream until a match in amplitude is obtained between the respective pulses of the sync signals associated with the first and second data streams.

16 . A system comprising:
a medical device configured to:
sense a non-stimulating sync signal;
obtain a physiological signal; and
in response to sensing the sync signal and obtaining the physiological signal, generate a sync-coupled physiological signal.

17 . The system of claim 16 , wherein the medical device is further configured to transmit the sync-coupled physiological signal to a device external to the medical device.

18 . The system of claim 17 , wherein the sync signal includes a predetermined series of pulses of current.

19 . The system of claim 18 , wherein the medical device is an implantable medical device including at least one channel configured to sense the non-stimulating sync signal, the at least one channel comprising at least one of an impedance sense channel, a left ventricle lead channel, and an evoked response channel.

20 . The system of claim 19 , wherein the medical device is configured to receive a second sync-coupled physiological signal and align, in time, both sync-coupled physiological signals.

Assignees

• Cardiac Pacemakers Inc

Inventors

• Thakur Pramodsingh H
• Ternes David J
• Maile Keith R
• Shen Zhe
• Ruble Stephen B
• Simms Howard D
• Emerson Paul F

Classifications

• A61N1/37254

  Pacemaker or defibrillator security, e.g. to prevent or inhibit programming alterations by hackers or unauthorised individuals · CPC title

• A61B5/0022

  Monitoring a patient using a global network, e.g. telephone networks, internet · CPC title

• A61B5/0205

  Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition · CPC title

• A61B5/0031 Primary

  Implanted circuitry · CPC title

• G16H40/67

  for remote operation · CPC title