Method and apparatus providing asynchronous neural stimulation

1. A method of providing neural stimulation to a patient with a neural stimulator comprising a comparator, a monitor, a stimulator configured to provide a stimulation having a plurality of stimulation parameters, and a random number generator, said neural stimulation having a target within a range of pseudo-random variation of an amount of neural stimulation for at least one of said plurality of stimulation parameters, comprising the steps of:

providing neural stimulation having said plurality of stimulation parameters with said stimulator of said neural stimulator;

pseudo-randomly varying at least one of said plurality of stimulation parameters with said random number generator;

monitoring said neural stimulation actually delivered to said patient with said monitor of said neural stimulator;

comparing said neural stimulation actually delivered to said patient with said target within said range of pseudo-random variation of said amount of neural stimulation of said at least one of said plurality of stimulation parameters with said comparator of said neural stimulator; and

said neural stimulator taking an action based upon said monitoring step.

2. A method as in claim 1 wherein said taking an action step comprises modifying at least one of said plurality of stimulation parameters in order that said neural stimulation more closely matches said target.

3. A method as in claim 1 wherein said taking an action step comprises notifying a user of a result of said monitoring step.

4. The method as in claim 1 wherein said plurality of stimulation parameters is at least two of a pulse amplitude, a pulse width and an inter-stimulation interval.

5. A method of providing neural stimulation having a plurality of stimulation parameters to a patient with a neural stimulator comprising a stimulator and a random number generator, said neural stimulation having a target of neural stimulation actually delivered within a range of pseudo-random variation of an amount of neural stimulation for at least one of said plurality of stimulation parameters, said target determined, at least in part, by said plurality of stimulation parameters, comprising the steps of:

providing neural stimulation specified by said plurality of stimulation parameters with said stimulator of said neural stimulator;

monitoring said neural stimulation actually delivered to said patient; and

pseudo-randomly varying at least one of said plurality of stimulation parameters with said random number generator in a way to more closely match said target of neural stimulation actually delivered.

6. A method as in claim 5 wherein said pseudo-randomly varying step comprises the steps of:

generating a finite sequence of values within said range of stimulation parameter values of at least one of said plurality of stimulation parameters; and

selecting one of said finite sequence of values for said neural stimulation.

7. A method as in claim 6 wherein said range of stimulation parameter values is selected by said neural stimulator so that an average of said finite sequence of values more closely matches said target of neural stimulation actually delivered than would occur randomly.

8. A method as in claim 6 wherein said range of stimulation parameter values is selected by said neural stimulator so that an average of said finite sequence of values approximates said target of neural stimulation actually delivered.

9. A method as in claim 8 wherein said range of stimulation parameter values is selected by said neural stimulator so that said average of said finite sequence of values matches said target of neural stimulation actually delivered.

10. A method as in claim 6 wherein said selecting step is repeated during a stimulation treatment period.

11. A method as in claim 10 wherein said generating step is performed manually.

12. A method as in claim 10 wherein possible values within said range of stimulation parameter values for said values of said sequence of values are generated pseudo-randomly and wherein said selecting step is performed manually.

13. A method as in claim 5 wherein said at least one of said plurality of stimulation parameters comprises a parameter selected from the group consisting of an inter-stimulation interval, amplitude and pulse width.