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, comprising:
a signal generator having instructions to generate an electrical signal to address the person's disorder, the disorder including at least one of asthma, allergic rhinitis, allergic bronchitis, and exercise-induced bronchoconstriction;
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
an earpiece shaped to fit against skin of the person's external ear, external ear canal, or both, the earpiece carrying an electrode coupled to the signal generator and configured to be positioned in electrical communication with at least one auricular nerve of the person,
wherein the signal generator has instructions to apply a first electrical signal to the right ear and a second electrical signal to the left ear, the second electrical signal differing from the first electrical signal with respect to one or more of frequency or amplitude.
2. The system of claim 1 , wherein the earpiece is a first earpiece shaped to fit the person's right ear, the system further comprising a second earpiece shaped to the person's left ear.
3. The system of claim 2 , wherein the signal generator has instructions to apply the first electrical signal to the first earpiece and the second electrical signal to the second earpiece (i) simultaneously, (ii) sequentially, or (iii) simultaneously during a first period, and sequentially during a second period.
4. The system of claim 1 , wherein the signal generator includes a neckpiece positionable around the person's neck, and wherein the system further comprises an earpiece link coupled between the neckpiece and the earpiece.
5. The system of claim 1 , wherein the electrical signal is one or both of a non-paresthesia-generating electrical signal and a non-sensory response electrical signal.
6. The system of claim 1 , wherein the electrode includes a conductive polymer outer surface.
7. The system of claim 6 , wherein the conductive polymer outer surface is coupled to a non-conductive backing.
8. 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.
9. The system of claim 1 , further comprising a feedback device configured to provide a feedback signal to the person.
10. The system of claim 9 , wherein the feedback device includes an audible feedback device configured to generate a feedback signal in the patient's audible frequency range.
11. The system of claim 10 , wherein a frequency of the feedback signal is patient-specific.
12. The system of claim 1 , further comprising a proximity sensor positioned to detect a location of the electrode relative to the patient's skin.
13. The system of claim 1 , wherein the pulse width is in a pulse width range from about 16 microseconds to about 24 microseconds.
14. The system of claim 13 , wherein the pulse width is about 20 microseconds.
15. The system of claim 1 , wherein at least a portion of the electrical signal has an interpulse period in an interpulse period range from about 1 microsecond to about 15 microseconds.
16. The system of claim 1 , wherein at least a portion of the electrical signal has an interphase period in an interphase period range from about 1 microsecond to about 10 microseconds.
17. A method for treating a person having a disorder, the disorder including at least one of: asthma, allergic rhinitis, allergic bronchitis, and exercise-induced bronchoconstriction, the method comprising:
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 skin of the person's external ear, external ear canal, or both;
wherein programming the signal generator to apply the first electrical signal to the patient's right ear, and programming the signal generator to apply a second electrical signal to the patient's left ear,
wherein the second electrical signal differs from the first electrical signal with respect to one or more of frequency or amplitude;
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.
18. The method of claim 17 , wherein programming the signal generator to apply the electrical signal includes programming the signal generator to apply one or both of a paresthesia-free electrical signal and a non-sensory-response electrical signal.
19. The method of claim 17 , wherein programming the signal generator to apply the electrical signal includes programming the signal generator to apply the electrical signal to thereby cause an auricular branch of the person's vagal nerve to generate an afferent response.
20. The method of claim 17 , wherein programming the signal generator to apply the electrical signal includes programming the signal generator to apply the electrical signal to one of the person's ears.
21. The method of claim 17 , wherein programming the signal generator to apply the electrical signal includes programming the signal generator to apply the electrical signal to both of the person's ears.
22. The method of claim 17 , wherein programming the signal generator includes programming the signal generator to increase the amplitude of the electrical signal over multiple steps from a first value to a second value.
23. The method of claim 17 , wherein programming the signal generator to apply the electrical signal includes programming the signal generator to apply the electrical signal for a duration of from about two seconds to about thirty minutes.
24. The method of claim 17 , wherein programming the signal generator to apply the electrical signal includes programming the signal generator to apply the electrical signal over the course of at most two session per day.
25. The method of claim 17 , wherein programming the signal generator to apply the electrical signal includes programming the signal generator to apply the electrical signal at a frequency above the person's auditory threshold.