Neural stimulation for treatment of metabolic syndrome and type 2 diabetes
Systems and methods are described for treating metabolic syndrome and/or Type 2 diabetes, and/or one or more of their attendant conditions, by neural stimulation. In one embodiment, an implantable pulse generator is electrically coupled to a peripheral nerve, such as the splanchnic nerve. Neural stimulation configured to either block transmission or stimulate transmission of the peripheral nerve may be used to treat metabolic syndrome and Type 2 diabetes.
1. A method, of treating at least dyslipidemia comprising:
selecting a patient suffering from dyslipidemia;
electrically modulating a splanchnic nerve of the patient in a stimulation pattern that ameliorates or eliminates dyslipidemia;
wherein said stimulation pattern comprises a stimulation intensity, and said stimulation intensity is between 0.005 and 5.0 mA-msec;
wherein said stimulation pattern comprises an on time and an off time; and wherein said off time is no less than said on time;
wherein said stimulation pattern comprises a frequency, a pulse width, and a current; and
wherein said frequency is between 0.1 Hz and 50 Hz; said pulse width is between 100 microseconds and 1 millisecond; and said current is between 0.1 mA and 10 mA.
2. The method of claim 1 , further comprising: providing a first electrical signal to said nerve at a first stimulation intensity during a first portion of a first stimulation time period; applying a second electrical signal to said nerve at a second stimulation intensity during a second portion of a first stimulation time period; ceasing or substantially reducing said applying of said second signal during a first no-stimulation time period; thereafter, applying a third electrical signal to said nerve at a third stimulation intensity during a first portion of a second stimulation time period; applying a fourth electrical signal to the nerve at a fourth stimulation intensity during a second portion of a second stimulation time period; and ceasing or substantially reducing said applying of said fourth signal during a second no-stimulation period.
3. The method of claim 1 , further comprising:
applying a first plurality of temporally sequential electrical signals during a first plurality of respective stimulation periods, each of said first plurality of signals having a stimulation intensity that is greater than the stimulation intensity of the preceding signal;
thereafter, ceasing or substantially reducing electrical stimulation to said nerve during a first no-stimulation period;
thereafter, applying a second plurality of temporally sequential electrical signals during a second plurality of respective stimulation periods, each of said second plurality of signals having a stimulation intensity that is greater than the stimulation intensity of the preceding signal; and
thereafter, ceasing or substantially reducing electrical stimulation to said nerve during a second no-stimulation period.
4. The method of claim 1 , further comprising;
electrically stimulating said nerve for a first time and at a first stimulation intensity;
thereafter, electrically stimulating said nerve for a second time and at a second stimulation intensity, said second stimulation intensity being greater than said first stimulation intensity; and
thereafter, providing a period during which electrical stimulation at said nerve is absent or substantially less than the second stimulation intensity.
5. The method of claim 1 , wherein said patient has dyslipidemia and hypertension.
6. The method of claim 1 , wherein said patient has dyslipidemia and hyperglycemia.
7. The method of claim 1 , wherein said patient has dyslipidemia and hyperinsulinemia.
8. The method of claim 1 , wherein said patient has dyslipidemia and insulin resistance.
9. The method of claim 1 , wherein said dyslipidemia comprises decreased HDL, and said stimulation pattern increases HDL.
10. The method of claim 1 , wherein said dyslipidemia comprises elevated triglycerides, and said stimulation pattern decreases triglycerides.
11. The method of claim 1 , wherein said dyslipidemia comprises elevated LDL, and said stimulation pattern decreases LDL.
12. The method of claim 1 , wherein said stimulation pattern includes a stimulation intensity ramping portion extending over a plurality of days and a substantial reduction in stimulation intensity portion occurring after the stimulation intensity ramping portion.