Adjustment of therapy based on acceleration

Patent metadata

Field	Value
Publication number	US-9737719-B2
Application number	US-201213457104-A
Country	US
Kind code	B2
Filing date	Apr 26, 2012
Priority date	Apr 26, 2012
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A medical device provides stimulation therapy to a patient based on a set of therapy parameters. One or more therapy parameters may be automatically adjusted based on acceleration forces detected by a sensor, the acceleration forces being applied to the patient. In some examples, adjustments to one or more therapy parameter may be made based on an algorithm. The algorithm may be defined by acceleration and therapy parameter value pairs associated with opposite patient positions.

First claim

The invention claimed is:

1. A method comprising:
receiving, by a processor, data representative of a first therapy parameter value for delivery of a therapy while a patient is in a first position, the first therapy parameter value associated with a first acceleration value, and a second therapy parameter value for delivery of the therapy while the patient is in a second position, the second therapy parameter value associated with a second acceleration value, wherein the first position is opposite the second position;
sensing, by an acceleration sensor, a third acceleration value;
generating, by the processor, a third therapy parameter value for delivery of a therapy to a patient based on an algorithm defined as a function of the first therapy parameter value and the second therapy parameter value, and a relationship of the third acceleration value to the first and second acceleration values; and
controlling, by a therapy delivery device, a medical device to deliver the therapy to the patient based on the third therapy parameter value.

2. The method of claim 1 , further comprising:
sensing the first acceleration value from the acceleration sensor while the patient is in the first position;
receiving a first therapy parameter value for delivery of the therapy to the patient while the patient is in the first position;
associating the first therapy parameter value with the first acceleration value;
sensing the second acceleration value from the acceleration sensor while the patient is in the second position;
receiving the second therapy parameter value for delivery of the therapy to the patient while the patient is in the second position; and
associating the second therapy parameter value with the second acceleration value.

3. The method of claim 2 , wherein the first therapy parameter value and the second therapy parameter value are generated based on patient feedback.

4. The method of claim 2 , wherein the acceleration sensor is a single-axis accelerometer, the first acceleration vector value is 1G, and the second acceleration vector value is −1G.

5. The method of claim 4 , wherein the third acceleration value is greater than 1G.

6. The method of claim 4 , wherein the third acceleration value is between 1G and −1G.

7. The method of claim 2 , further comprising selecting a first direction of the acceleration sensor for determination of the first and second acceleration values.

8. The method of claim 7 , wherein the selection is based on an effect of spinal cord movement in a second direction and a third direction on the third therapy parameter value, the second and third directions being perpendicular to the first direction.

9. The method of claim 8 , wherein the acceleration sensor is a single axis accelerometer, and wherein the axis of the single axis accelerometer aligns with the first direction.

10. The method of claim 8 , wherein the acceleration sensor is a single axis accelerometer, and wherein the axis of the single axis accelerometer does not align with the first direction, the second direction, or the third direction.

11. The method of claim 1 , wherein the third therapy parameter value is a stimulation amplitude value generated based on the formula

Amp
⁡

(
t
)

=

Amp
⁡

(

V
1

)

+

Amp
⁡

(

V
2

)

|

V
1

-

V
2

|

+

Amp
⁡

(

V
1

)

*

|

V
p

|

,

wherein Amp(t) is the third therapy parameter value, Amp(V 1 ) and Amp(V 2 ) are the first and second therapy parameter values, respectively, V 1 and V 2 are the first and second acceleration values, respectively, and V p is the third acceleration value.

12. The method of claim 1 , wherein the first position is a prone position and the second position is a supine position.

13. The method of claim 1 , wherein the first position and the second position are at least one of the following opposing patient position pairs:
supine and prone,
left side and right side, and
upright and upside down.

14. The method of claim 13 , wherein the opposing patient position pair is selected based on an axis of interest.

15. The method of claim 1 , wherein the therapy is electrical stimulation therapy.

16. A medical device system comprising:
an acceleration sensor configured to detect a first acceleration value while a patient is in a first position, a second acceleration value while the patient is in a second position, and a third acceleration value while the patient is in a third position, the first position opposite the second position;
a processor configured to:
receive data representative of a first therapy parameter value for delivery of a therapy while the patient is in the first position, the first therapy parameter value associated with the first acceleration value, and a second therapy parameter value for delivery of therapy while the patient is in the second position, the second therapy parameter value associated with the second acceleration value, and
generate a third therapy parameter value for delivery of a therapy to the patient based on an algorithm defined as a function of the first therapy parameter value and the second therapy parameter value, and a relationship of the third acceleration value to the first and second acceleration values; and

a therapy delivery module configured to deliver the therapy to the patient based on the third parameter value.

17. The system of claim 16 , wherein the processor is further configured to: receive the first therapy parameter value while the patient is

Assignees

• Skelton Dennis M
• Poletto Christopher
• Panken Eric J
• Medtronic Inc

Inventors

• Skelton Dennis M
• Poletto Christopher
• Panken Eric J

Classifications

• A61N1/36542

  controlled by body motion, e.g. acceleration · CPC title

• A61N1/36185

  Selection of the electrode configuration · CPC title

• A61N1/36171

  Frequency · CPC title

• A61N1/36146

  specified by the stimulation parameters · CPC title

• A61N1/36071

  Pain · CPC title