| 摘要 |
The present invention provides a medical device to cold treat desired region s. An injection tube with an open distal end, and at least one aperture proxima te thereto is disposed inside of a cooling tube, defining a cooling lumen therebetween. A third outer tube member is disposed around the second coolin g member, defining a return lumen therebetween. A supply of fluid, regulated b y a controller mechanism coupled to the device, flows through the injection lumen, the apertures and the cooling lumen to insulate and cool the fluid supplied into the injection lumen. The supplied fluid flows through the injection lumen and its distal end into the return lumen to cool the surrounding areas external to and proximate the distal end of the device.</S DOAB>
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