Auricular nerve stimulation to address patient disorders, and associated systems and methods
Auricular nerve stimulation techniques for addressing patient disorders, and associated systems and methods. A representative system includes a signal generator having instructions to generate an electrical therapy signal, at least a portion of the electrical therapy signal having a frequency at or above the patient's auditory frequency limit, an amplitude in an amplitude range from about 0.1 mA to about 10 mA, and a pulse width in a pulse width range from 5 microseconds to 30 microseconds. The system further includes at least one earpiece having a contoured outer surface shaped to fit against the skin of the patient's external ear, external ear canal, or both, the at least one earpiece carrying at least two transcutaneous electrodes positioned to be in electrical communication with the auricular innervation of the patient, e.g., the auricular vagal nerve.
1. A system for delivering electrical signals to a person having a disorder, the system comprising:
a signal generator having instructions to generate an electrical signal to address the person's disorder, the disorder including at least one of:
irritable bowel syndrome (IBS), Crohn's disease, psoriasis, Sjogren's syndrome, autoimmune nephropathy, or lupus;
wherein at least a portion of the electrical signal has:
a frequency in a frequency range from about 15 kHz to about 50 kHz;
an amplitude in an amplitude range from about 0.1 mA to about 10 mA; and
a pulse width in a pulse width range from about 5 microseconds to about 30 microseconds; and
two earpieces, each shaped to fit against skin of the person's external ear, external ear canal, or both, each earpiece carrying at least two transcutaneous electrodes coupled to the signal generator and positioned to be in electrical communication with at least one auricular nerve of the person, wherein the electrical signal includes a first electrical signal directed to the person's right ear, and a second electrical signal directed to the person's left ear, the first electrical signal differing from the second electrical signal with respect to one or more of frequency or amplitude.
2. The system of claim 1 wherein at least one of the electrical signals is (a) a non-paresthesia-generating electrical signal, (b) a non-sensory response electrical signal, or (c) both (a) and (b).
3. The system of claim 1 wherein the at least two transcutaneous electrodes include a conductive polymer outer surface.
4. The system of claim 1 wherein the signal generator includes a neckpiece positionable to be supported by the person around the person's neck, and wherein the system further comprises an earpiece link coupled between the neckpiece and at least one of the earpieces.
5. The system of claim 4 wherein the earpiece link and the signal generator are contained in a unitary housing.
6. The system of claim 1 wherein least one of the earpieces is custom fit to the person's ear.
7. The system of claim 1 , further comprising an external controller configured to be in wireless communication with the signal generator, wherein the external controller includes a mobile device having an application for controlling the signal generator.
8. The system of claim 1 wherein the electrical signal has an interphase period between two pulses of opposite polarity, and wherein the interphase period is within a range from about 1 microsecond to about 10 microseconds.
9. A method for treating a person having a disorder, the disorder including at least one of: irritable bowel syndrome (IBS), Crohn's disease, psoriasis, Sjogren's syndrome, autoimmune nephropathy, or lupus, the method comprising:
in response to an indication that the person has the disorder, programming a signal generator to apply an electrical signal to an auricular nerve of the person to address the person's disorder, wherein the electrical signal is applied via a plurality of transcutaneous electrodes carried by an earpiece positioned against the skin of the person's external ear, external ear canal, or both; and
wherein at least a portion of the electrical signal has:
a frequency in a frequency range from about 15 kHz to about 50 kHz;
an amplitude in an amplitude range from about 0.1 mA to about 10 mA; and
a pulse width in a pulse width range from about 5 microseconds to about 30 microseconds; and
wherein the electrical signal includes a first electrical signal programmed to be applied to the patient's right ear and a second electrical signal programmed to be applied to the patient's left ear, the first electrical signal differing from the second electrical signal with respect to one or more of frequency or amplitude.
10. The method of claim 9 wherein at least one of the electrical signals (a) does not generate paresthesia in the person, (b) does not generate a person-detectable sensory response, or (c) both (a) and (b).
11. The method of claim 9 wherein at least one of the electrical signals causes the auricular branch of the person's vagal nerve to generate an afferent response.
12. The method of claim 9 wherein programming includes programming the signal generator to direct the electrical therapy signals is to each ear (a) simultaneously, (b) sequentially, or (c) simultaneously during a first period, and sequentially during a second period.
13. The method of claim 9 wherein programming includes programming the signal generator to increase the amplitude of the electrical signal over multiple steps from a first value to a second value.
14. The method of claim 9 wherein the electrical signal is applied as part of a treatment regimen that also includes a pharmacological treatment of the person.