Granted Patent
B2
US 12,502,540 · App. 17/521,521 · Granted Dec 23, 2025
Method and apparatus for multi modal electrical modulation of pain using composite electromagnetic fields
Inventors:
Ricardo Vallejo (Bloomington, IL); David Leonardo Cedeno (Normal, IL); Nathan A. Torgerson (Andover, MN); Brian Andrew Smith (Apple Valley, MN)
Assignee:
Medtronic SG, LLC
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Abstract
Apparatus and methods for managing pain uses a single composite modulation/stimulation signal with variable characteristics to achieve the same results as separate varying electromagnetic signals, including spinal cord stimulation or peripheral nerve stimulation.
Claims (35)
1 . A system comprising:
a signal generator; and
processing circuitry configured to:
control the signal generator to deliver a biphasic signal to a nerve area for a first period of time;
control the signal generator to apply, via one or more electrodes, a first phase segment of the biphasic signal to the nerve area during the first period of time, the first phase segment having a first frequency;
control the signal generator to apply, via the one or more electrodes, a second phase segment of the biphasic signal to the nerve area during the first period of time, the second phase segment having a second frequency lower than the first frequency of the first phase segment; and
subsequent to applying the biphasic signal to the nerve area for the first period of time, control the signal generator to turn off the biphasic signal for a second period of time greater than the first period of time.
2 . The system of claim 1 , wherein the processing circuitry is configured to turn off the biphasic signal for the second period of time in order to retain a residual effect of the biphasic signal for a patient during the second period of time.
3 . The system of claim 1 , wherein the signal generator is configured to provide the first phase segment at a frequency between 200 Hz and 1400 Hz (burst).
4 . The system of claim 1 , wherein the signal generator is configured to provide the second phase segment at a frequency between 20 Hz to 100 Hz.
5 . The system of claim 4 , wherein the signal generator is configured to provide the second phase segment at a frequency of about 50 Hz.
6 . The system of claim 1 , wherein the signal generator module is configured to provide the first phase segment at a frequency between 750 Hz and 1050 Hz (average).
7 . The system of claim 1 , wherein the signal generator module is configured to provide the first phase segment at a frequency of about 1200 Hz (burst) and about 900 Hz (average).
8 . The system of claim 1 , wherein the signal generator module is configured to provide the first phase segment with pulses having a pulse width between about 100 and 400 microseconds.
9 . The system of claim 1 , wherein the signal generator module is configured to provide the first phase segment with pulses having a pulse width between about 150 and 200 microseconds.
10 . The system of claim 1 , wherein the signal generator module is configured to provide the second phase segment with pulses having a pulse width between about 100 and 400 microseconds.
11 . The system of claim 1 , wherein the first phase segment comprises a respective rectangular recovery pulse following each stimulation pulse of the first phase segment.
12 . The system of claim 1 , wherein the first phase segment comprises an exponentially decaying recovery pulse following each stimulation pulse of the first phase segment.
13 . The system of claim 1 , wherein the second phase segment comprises a respective rectangular recovery pulse following each stimulation pulse of the second phase segment.
14 . The system of claim 1 , wherein the second phase segment comprises an exponentially decaying recovery pulse following each stimulation pulse of the second phase segment.
15 . The system of claim 1 , wherein the processing circuitry is configured to control the signal generator module to cycle the biphasic signal.
16 . The system of claim 15 , further comprising a sensor configured to detect a patient condition, and wherein the processing circuitry is configured to control the signal generator to cycle the biphasic signal based on a change in the patient condition.
17 . A signal generator comprising electronic circuitry, the signal generator configured to:
deliver a biphasic signal to a nerve area for a first period of time;
apply, via one or more electrodes, a first phase segment of the biphasic signal to the nerve area during the first period of time, the first phase segment having a first frequency;
apply, via the one or more electrodes, a second phase segment of the biphasic signal to the nerve area during the first period of time, the second phase segment having a second frequency lower than the first frequency of the first phase segment; and
subsequent to applying the biphasic signal to the nerve area for the first period of time, turn off the biphasic signal for a second period of time greater than the first period of time.
18 . The signal generator of claim 17 , wherein the signal generator is configured to turn off the biphasic signal for the second period of time in order to retain a residual effect of the biphasic signal for a patient during the second period of time.
19 . A method comprising:
configuring a signal generator to:
deliver a biphasic signal to a nerve area for a first period of time;
apply, via one or more electrodes, a first phase segment of the biphasic signal to the nerve area during the first period of time, the first phase segment having a first frequency;
apply, via the one or more electrodes, a second phase segment of the biphasic signal to the nerve area during the first period of time, the second phase segment having a second frequency lower than the first frequency of the first phase segment; and
subsequent to applying the biphasic signal to the nerve area for the first period of time, turn off the biphasic signal for a second period of time greater than the first period of time.
20 . The method of claim 19 , further comprising configuring the signal generator to turn off the biphasic signal for the second period of time in order to retain a residual effect of the biphasic signal for a patient during the second period of time.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Nov 8, 2021
From: VALLEJO, RICARDO; CEDENO, DAVID LEONARDO; TORGERSON, NATHAN A.; SMITH, BRIAN ANDREW
To: MEDTRONIC SG, LLC
Reel/Frame 058050/0669 →
Continuity (18)
Provisional Application
62377139
· Aug 19, 2016
Provisional Application
62196030
· Jul 23, 2015
Provisional Application
62135999
· Mar 20, 2015
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