Methods for determining neurostimulation electrode configurations based on neural localization
Methods and systems for obtaining and analyzing electromyography responses of electrodes of an implanted neurostimulation lead for use neurostimulation programming are provided herein. System setups for neural localization and/or programming include a clinician programmer coupleable with a temporary or permanent lead implantable in a patient and at least one pair of EMG sensing electrodes minimally invasively positioned on a skin surface or within the patient. The clinician programmer is configured to determine a plurality of recommended electrode configurations based on thresholds and EMG responses of the plurality of electrodes and rank the electrode configuration according to pre-determined criteria. The clinician programmer further includes graphical user interface on which the plurality of recommended electrode configurations are displayed for modification and/or selection by a clinician in programming an IPG or EPG coupled with the lead to apply a neurostimulation treatment according to the selected electrode configuration.
1. A method of programming a neurostimulation device for treatment of overactive bladder and/or fecal incontinence, the neurostimulation device having an implanted neurostimulation lead with a plurality of electrodes that is operatively coupled with a clinician programmer, the method comprising:
receiving a stimulation threshold value for each of the plurality of electrodes with the clinician programmer, wherein the stimulation threshold value is based, at least in part, on an electromyographic (EMG) recording of at least one neuromuscular response during stimulation of each electrode of the plurality of electrodes;
generating, with the clinician programmer, a plurality of recommended electrode configurations for a plurality of electrodes of the implanted neurostimulation lead by:
identifying, based on the received stimulation threshold values, cathode configurations of the plurality of recommended electrode configurations,
identifying anode configurations of the plurality of recommended electrode configurations;
outputting the plurality of recommended electrode configurations, which include the identified cathode and anode configurations, to a user on a graphical user interface display of the clinician programmer for selection by the user; and
determining one or more neurostimulation programs for one or more electrode configurations of the plurality of recommended electrode configurations with the clinician programmer for treatment of overactive bladder and/or fecal incontinence.
2. The method of claim 1 , wherein identifying the cathode configurations comprises:
categorizing the plurality of electrodes in one of at least three different tiers based on the stimulation threshold values, the at least three different tiers including a first tier, a second tier and a third tier, the first tier denoting good electrodes for therapy delivery, the second tier denoting marginal electrodes for delivering therapy, and the third tier denoting electrodes unacceptable for delivering therapy;
ranking electrodes within each tier as to suitability for delivering neurostimulation therapy; and
assigning the cathode configurations of the plurality of recommended electrode configurations with the clinician programmer based on the ranking of electrodes and tiers and a pre-determined criteria.
3. The method of claim 2 , wherein the pre-determined criteria comprises:
(i) assigning single cathode configurations for each electrode in the first tier, prioritized from lowest to highest threshold.
4. The method of claim 3 , the pre-determined criteria further comprising:
(ii) assigning double cathode configurations for each pair of adjacent electrodes in the first tier, prioritized by lowest combined threshold.
5. The method of claim 4 , the pre-determined criteria further comprising:
(iii) assigning single cathode configurations for each electrode in the second tier, prioritized from lowest to highest threshold.
6. The method of claim 5 , the pre-determined criteria further comprising:
(iv) assigning double cathode configurations for each pair of adjacent electrodes in the second tier, prioritized by lowest combined threshold.
7. The method of claim 6 , wherein the pre-determined criteria is applied in the order recited in the respective claims.
8. The method of claim 2 , wherein identifying anode configurations comprises assigning as an anode for each cathode configuration an electrode of the plurality of electrodes furthest from an assigned cathode when the respective configuration corresponds to bipolar operation.
9. The method of claim 2 , further comprising:
obtaining, with the clinician programmer, an impedance measurement for each electrode of the plurality and excluding any electrode with an unacceptable impedance from being assigned as a cathode or anode.
10. The method of claim 1 , wherein the plurality of recommended electrode configurations comprise bipolar and/or monopolar configurations.
11. The method of claim 10 , wherein at least one of the plurality of recommended electrode configurations includes a monopolar configuration with a can or housing of an implantable pulse generator identified as an anode.
12. A method of programming a neurostimulation device for treatment of overactive bladder and/or fecal incontinence, the neurostimulation device having an implanted neurostimulation lead with a plurality of electrodes that is operatively coupled with a clinician programmer, the method comprising:
generating, with the clinician programmer, a plurality of recommended electrode configurations for a plurality of electrodes of the implanted neurostimulation lead by:
receiving an electromyographic (EMG) recording of at least one neuromuscular response during stimulation of each electrode of the plurality of electrodes;
determining, based on the EMG recording, a stimulation threshold value for each of the plurality of electrodes;
identifying, based on the determined stimulation threshold values, cathode configurations of the plurality of recommended electrode configurations, and
identifying anode configurations of the plurality of recommended electrode configurations;
outputting the plurality of recommended electrode configurations, which include the identified cathode and anode configurations, to a user on a graphical user interface display of the clinician programmer for selection by the user.
13. The method of claim 12 , wherein identifying the cathode configurations comprises:
categorizing the plurality of electrodes in one of at least three different tiers based on the stimulation threshold values, the at least three different tiers including a first tier, a second tier and a third tier, the first tier denoting good electrodes for therapy delivery, the second tier denoting marginal electrodes for delivering therapy, and the third tier denoting electrodes unacceptable for delivering therapy;
ranking electrodes within each tier as to suitability for delivering neurostimulation therapy; and
assigning the cathode configurations of the plurality of recommended electrode configurations with the clinician programmer based on the ranking of electrodes and tiers and a pre-determined criteria.
14. The method of claim 13 , wherein the pre-determined criteria comprises:
(i) assigning single cathode configurations for each electrode in the first tier, prioritized from lowest to highest threshold.
15. The method of claim 14 , the pre-determined criteria further comprising:
(ii) assigning double cathode configurations for each pair of adjacent electrodes in the first tier, prioritized by lowest combined threshold.
16. The method of claim 15 , the pre-determined criteria further comprising:
(iii) assigning single cathode configurations for each electrode in the second tier, prioritized from lowest to highest threshold.
17. The method of claim 16 , wherein the pre-determined criteria is applied in the order recited in the respective claims.
18. The method of claim 13 , wherein identifying anode configurations comprises assigning as an anode for each cathode configuration an electrode of the plurality of electrodes furthest from an assigned cathode when the respective configuration corresponds to bipolar operation.
19. The method of claim 13 , further comprising:
obtaining, with the clinician programmer, an impedance measurement for each electrode of the plurality and excluding any electrode with an unacceptable impedance from being assigned as a cathode or anode.
20. The method of claim 12 , wherein at least one of the plurality of recommended electrode configurations includes a monopolar configuration with a can or housing of an implantable pulse generator identified as an anode.