Use of implantable sensors for proprioception and accurate sensor detection

• US 7,848,810 B1
• Filed: 03/01/2007
• Issued: 12/07/2010
• Est. Priority Date: 03/01/2007
• Status: Active Grant

• Current Assignee: Pacesetter Incorporated (Abbott Laboratories)
• Original Assignee: Pacesetter Incorporated (Abbott Laboratories)
• Inventors: Falkenberg, Eric, Nabutovsky, Yelena
• Primary Examiner(s): Manuel; George
• Assistant Examiner(s): Narayanaswamy; Shubatra
• Application Number:
  US11/681,033
• Time in Patent Office: 1,377 Days
• Field of Search: 600/17, 607/18
• US Class Current: 607/17
• CPC Class Codes: A61N 1/36535 controlled by body position or posture
• CPC Class Codes: A61N 1/36542 controlled by body motion, e.g. acceleration

Abstract

Implantable systems, and methods for use therewith, are provided for using an implantable sensor for detecting body position and/or body movement, and using what is learned therefrom to improve accuracy of an implantable sensor that is sensitive to at least one of body position and/or body movement. Also provided are implantable systems, and methods for use therewith, that detect body position and/or body movement in order to monitor a condition and/or detect specific episodes. Other embodiments are also provided.

Claims

1. In an implantable system, a method for improving the accuracy of an implantable sensor that is sensitive to at least one of body position and body movement, the method comprising:

(a) using a first implantable sensor to obtain a sensor signal indicative of a parameter of interest that is used for at least one of monitoring and feedback, where the first implantable sensor is sensitive to at least one of body position and body movement;

(b) using at least one further implantable sensor to detect at least one of body position and body movement;

(c) determining, based on the at least one of body position and body movement detected by the at least one further implantable sensor, an extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor;

wherein the determining of the extent to which to filter and/or otherwise process the sensor signal includes determining whether a first or a second level of filtering and/or otherwise processing of the sensor signal is to be performed, where the second level of filtering and/or otherwise processing requires a greater amount of power consumption than the first level of filtering and/or otherwise processing;

(d) filtering and/or otherwise processing the sensor signal obtained using the first implantable sensor to the extent determined at step (c), wherein at least some of the time step (d) produces a modified version of the sensor signal from the first implantable sensor; and

(e) using the sensor signal resulting from step (d) for at least one of monitoring and feedback, wherein at least some of the time step (e) includes using the modified version of the sensor signal resulting from step (d) for at least one of monitoring and feedback.

2. The method of claim 1, wherein:

step (b) includes using the at least one further implantable sensor to detect the body position of the patient; and

step (c) includes

(c.1) determining that the sensor signal obtained using the first implantable sensor is to be filtered and/or otherwise processed using the first level of filtering and/or other signal processing if it is determined at step (b) that the patient is supine; and

(c.2) determining that the sensor signal obtained using the first implantable sensor is to be filtered and/or otherwise processed using the second level of filtering and/or other signal processing if it is determined at step (b) that the patient is not supine, where the second level is greater than the first level.

3. The method of claim 1, wherein:

step (b) includes using the at least one further implantable sensor to detect an activity level associated with the body movement of the patient; and

step (c) includes

(c.1) determining that the sensor signal obtained using the first implantable sensor is to be filtered and/or otherwise processed using the first level of filtering and/or other signal processing if it is determined at step (b) that the activity level of the patient does not exceed a threshold; and

(c.2) determining that the sensor signal obtained using the first implantable sensor is to be filtered and/or otherwise processed using the second level of filtering and/or other signal processing if it is determined at step (b) that the activity level of the patient exceeds the threshold, where the second level is greater than the first level.

4. The method of claim 1, further comprising:

monitoring the patient'"'"'s heart rate; and

wherein step (c) comprises determining, based on the at least one of body position and body movement detected by the at least one further implantable sensor and the patient'"'"'s heart rate, the extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor.

5. The method of claim 1, wherein:

the first implantable sensor is sensitive to body movement;

step (b) comprises using the at least one further implantable sensor to detect body movement; and

step (c) comprises determining, based on the body movement detected by the at least one further implantable sensor, the extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor.

6. The method of claim 1, wherein:

the first implantable sensor is sensitive to body position;

step (b) comprises using the at least one further implantable sensor to detect body position; and

step (c) comprises determining, based on the body position detected by the at least one further implantable sensor, the extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor.

7. The method of claim 1, wherein:

the first implantable sensor is sensitive to both body position and body movement;

step (b) comprises using the at least one further implantable sensor to detect both body position and body movement; and

step (c) comprises determining, based on both the body position and body movement detected by the at least one further implantable sensor, the extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor.

8. An implantable system, comprising:

a first implantable sensor to obtain a sensor signal indicative of a parameter of interest that is used for at least one of monitoring and feedback, where the first implantable sensor is sensitive to at least one of body position and body movement;

at least one further implantable sensor to detect at least one of body position and body movement;

means for determining, based on the at least one of body position and body movement detected by the at least one further implantable sensor, an extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor;

wherein the means for determining determines whether a first or a second level of filtering and/or otherwise processing of the sensor signal is to be performed, where the second level of filtering and/or otherwise processing requires a greater amount of power consumption than the first level of filtering and/or otherwise processing;

means for filtering and/or otherwise processing the sensor signal obtained using the first implantable sensor to the extent determined by the means for determining, wherein, at least some of the time, the means for filtering and/or otherwise processing produces a modified version of the sensor signal from the first implantable sensor; and

means for using the filtered and/or otherwise processed sensor signal for at least one of monitoring and feedback wherein at least some of the time the modified version of the sensor signal is used for at least one of monitoring and feedback.

9. The implantable system of claim 8, wherein:

the at least one further implantable sensor detects the body position of the patient; and

the means for filtering and/or otherwise processing

uses the first level of filtering and/or other signal processing if the patient is supine, and

uses the second level of filtering and/or other signal processing if the patient is not supine, where the second level is greater than the first level.

10. The implantable system of claim 8, wherein:

the at least one further implantable sensor detects an activity level associated with the body movement of the patient; and

the means for filtering and/or otherwise processing

uses the first level of filtering and/or other signal processing if the activity level of the patient does not exceed a threshold; and

uses the second level of filtering and/or other signal processing if the activity level of the patient exceeds the threshold, where the second level is greater than the first level.

11. The implantable system of claim 8, further comprising:

means for monitoring the patient'"'"'s heart rate; and

wherein the means for determining determines, based on the at least one of body position and body movement detected by the at least one further implantable sensor and the patient'"'"'s heart rate, the extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor.

12. The implantable system of claim 8, wherein:

the first implantable sensor is sensitive to body movement;

the at least one further implantable sensor detects body movement; and

the means for determining determines, based on the body movement detected by the at least one further implantable sensor, the extent to which to filter and/or otherwise process the sensor signal obtained by the first implantable sensor.

13. The implantable system of claim 8, wherein:

the first implantable sensor is sensitive to body position;

the at least one further implantable sensor detects body position; and

the means for determining determines, based on the body position detected by the at least one further implantable sensor, the extent to which to filter and/or otherwise process the sensor signal obtained using the first implantable sensor.

14. In an implantable system, a method for improving the accuracy of an implantable sensor that is sensitive to body position, the method comprising:

(a) using a first implantable sensor to obtain a sensor signal indicative of a parameter of interest that is used for at least one of monitoring and feedback, where the first implantable sensor is sensitive to body position;

(b) using at least one further implantable sensor to detect body position; and

(c) determining, based on the body position detected by the at least one further implantable sensor, whether to utilize the sensor signal obtained using the first implantable sensor;

wherein step (c) includes putting the first implantable sensor in standby mode when the body position, as detected using the at least one further implantable sensor, is not a predetermined body position; and

wherein the first implantable sensor consumes less power when in the standby mode than when not in the standby mode.

15. An implantable system, comprising:

a first implantable sensor to obtain a sensor signal indicative of a parameter of interest that is used for at least one of monitoring and feedback, where the first implantable sensor is sensitive to body position;

at least one further implantable sensor to detect body position; and

means for determining, based on the body position detected by the at least one further implantable sensor, whether to utilize the sensor signal obtained using the first implantable sensor;

wherein the means for determining puts the first implantable sensor in standby mode when the body position, as detected using the at least one further implantable sensor, is not a predetermined body position; and

wherein the first implantable sensor consumes less power when in the standby mode than when not in the standby mode.

16. In an implantable system, a method for improving the accuracy of an implantable sensor that is sensitive to at least one of body position and body movement, the method comprising:

(a) using a first implantable sensor to obtain a sensor signal indicative of a parameter of interest that is used for at least one of monitoring and feedback, where the first implantable sensor is sensitive to at least one of body position and body movement;

(b) using at least one further implantable sensor to detect at least one of body position and body movement; and

(c) determining, based on the at least one of body position and body movement detected by the at least one further implantable sensor, an extent to which to filter the sensor signal obtained using the first implantable sensor;

wherein step (c) includes determining whether a first level of filtering or a second level of filtering is to be performed based on the at least one of body position and body movement, where second level of filtering requires a greater amount of power consumption than the first level of filtering.

17. The method of claim 16, further comprising:

(d) filtering the sensor signal to the extent determined at step (c); and

(e) using the sensor signal resulting from step (d) for at least one of monitoring and feedback.

18. The method of claim 16, wherein:

step (b) includes using the at least one further implantable sensor to detect the body position of the patient; and

step (c) includes

(c.1) determining that the sensor signal obtained using the first implantable sensor is to be filtered using the first level of filtering if it is determined at step (b) that the patient is supine; and

(c.2) determining that the sensor signal obtained using the first implantable sensor is to be filtered using the second level of filtering if it is determined at step (b) that the patient is not supine, where the second level is greater than the first level.

19. The method of claim 16, wherein:

step (b) includes using the at least one further implantable sensor to detect an activity level associated with the body movement of the patient; and

step (c) includes

(c.1) determining that the sensor signal obtained using the first implantable sensor is to be filtered using the first level of filtering if it is determined at step (b) that the activity level of the patient does not exceed a threshold; and

(c.2) determining that the sensor signal obtained using the first implantable sensor is to be filtered using the second level of filtering if it is determined at step (b) that the activity level of the patient exceeds the threshold, where the second level is greater than the first level.