Cryosurgical probe and method of manufacturing thereof

A method for manufacturing a cryoprobe, comprising:

• inserting a drain tube into a working tube, wherein the working tube includes a first end, and a distal end, an internal surface, and external surface, an inner diameter and an outer diameter, and wherein the drain tube has a first end connected to a first pressure supply, and a perforated second end which is in proximity to the distal end;
• welding the drain tube to the working tube at a first anchor point and a second anchor point;
• and
• welding the drain tube to the working tube from the first anchor point to the second anchor point such that there is at least a non-welded gap between the first anchor point and the second anchor point;
• wherein the working tube and the drain tube are adapted to enable a refrigerant to flow from a refrigerant supply tube through the working tube but exterior to the drain tube past the gap and into a tip at a distal end of the working tube from which the refrigerant then passes from the tip the drain tube.