Subdermal cryogenic remodeling of muscles, nerves, connective tissue, and/or adipose tissue (fat)

1. A method for treating pain or spasm associated with a nerve of a patient, the method comprising:

locating a target nerve, wherein the target nerve is a peripheral nerve;

inserting sharpened distal ends of a plurality of needles of a cryogenic system into a skin of the patient at a desired location in proximity to the target nerve immediately beneath the skin of the patient, wherein each of the plurality of needles comprise:

an outer lumen extending distally toward the distal end of the needle, and

an inner lumen extending distally within the outer lumen, wherein the inner lumen comprises a distal opening that is open to the outer lumen;

delivering a cooling fluid from a cooling fluid source to the plurality of needles via a fluidic pathway, the fluidic pathway comprising the cooling fluid source, the inner lumen and the outer lumen of each of the plurality of needles, wherein a flow of the cooling fluid cools the plurality of needles so that the plurality of needles cool the target nerve at the desired location sufficiently such that the pain or spasm is inhibited;

venting the cooling fluid proximally as a gas from the distal ends of the plurality of needles via the fluidic pathway; and

applying a warming energy to collateral tissue near the target nerve, wherein the warming energy is applied along a surface of the skin with a heater on a surface of the cryogenic system proximal to the distal ends of the plurality of needles to prevent collateral tissue damage by avoiding visible necrosis of dermal tissues of the skin surface.

2. The method of claim 1 , wherein the cooling fluid flows from the cooling fluid source to the outer lumen via the inner lumen of each of the plurality of needles.

3. The method of claim 1 , wherein the cooling fluid is in a liquid state when in the cooling fluid source.

4. The method of claim 3 , wherein at least some of the cooling fluid is caused to vaporize into a gaseous state within the plurality of needles.

5. The method of claim 1 , further comprising metering the cooling fluid so as to minimize overflow during treatment.

6. The method of claim 1 , wherein delivering the cooling fluid to the plurality of needles is pulsed so as to allow sufficient flow during treatment.

7. The method of claim 1 , wherein at least a portion of the target nerve is caused to freeze at the desired location.

8. The method of claim 1 , wherein the desired location is within a hypodermis of the patient.

9. The method of claim 1 , wherein the desired location is within a superficial fascia or a muscle tissue of the patient.

10. The method of claim 1 , wherein each of the plurality of needles are substantially linear, and wherein the plurality of needles are spaced relative to each other at a distance between 0.25 mm and 2 mm.

11. The method of claim 1 , wherein the warming energy is varied in response to a temperature of the surface of the cryogenic system or a temperature of engaged skin the skin surface.

12. The method of claim 1 , wherein the warming energy is applied during delivery of the cooling fluid.

13. The method of claim 1 , wherein the cooling fluid source is disposed in a handpiece.

14. The method of claim 1 , further comprising controlling a treatment time and temperature for delivering the cooling fluid with a controller.

15. The method of claim 14 , wherein the controller is disposed in a handpiece.

16. A method for treating pain or spasm associated with a nerve of a patient, the method comprising:

providing a cryogenic system comprising a handpiece having a size and shape suitable for supporting a hand of an operator and a needle removably coupled with a distal portion of the handpiece;

locating a target nerve, wherein the target nerve is a peripheral nerve;

inserting a distal end of the needle of the cryogenic system into a skin of the patient at a desired location in proximity to the target nerve immediately beneath the skin of the patient, wherein the needle comprises:

an outer lumen extending distally toward the distal end of the needle, and

an inner lumen extending distally within the outer lumen, wherein the inner lumen comprises a distal opening that is open to the outer lumen;

delivering a cooling fluid from a cooling fluid source to the needle via a fluidic pathway, the fluidic pathway comprising the cooling fluid source, the inner lumen, and the outer lumen, wherein a flow of the cooling fluid cools the needle so that the needle cools the target nerve at the desired location sufficiently such that the pain or spasm is inhibited;

venting the cooling fluid proximally as a gas from the distal end of the needle via the fluidic pathway; and

applying a warming energy to collateral tissue near the target nerve, wherein the warming energy is applied along a surface of the skin with a heater on a surface of the cryogenic system proximal to the distal end of the needle to prevent collateral tissue damage by avoiding visible necrosis of dermal tissues of the skin surface.

17. The method of claim 16 , wherein the needle has a length between 0.5 mm and 5 cm.

18. The method of claim 16 , wherein the cooling fluid source is disposed in the handpiece.

19. The method of claim 16 , wherein delivering the cooling fluid to the needle is pulsed so as to allow sufficient flow during treatment.

20. The method of claim 16 , wherein the warming energy is varied in response to a temperature of the surface of the cryogenic system or a temperature of the skin surface.

21. The method of claim 16 , wherein the desired location is within a hypodermis of the patient.

22. The method of claim 16 , wherein the desired location is within a superficial fascia or a muscle tissue of the patient.