Patent ID: 8439905

Claim:
A product for performing cryotherapeutic procedures, selected from a group comprising catheters, probes, cryo-instruments, probing rods, and cryo-devices, said product comprising: a longitudinal body which comprises a proximal end and a distal end with a tubular shaft positioned therebetween, said longitudinal body comprising a lumen therein, and said longitudinal body having an outer sheath defining the dimension and shape of said longitudinal body; a connector positioned at said proximal end and capable of sealing to said outer sheath; at least one first internal tube and at least one second internal tube protruding into said lumen of said longitudinal body through said connector; said first internal tube providing a supply line for cryogen to pass to said distal end and said second internal tube providing a return line for cryogen to pass from said distal end; and an insulative vacuum is created within said lumen of said longitudinal body along a length of said distal end of the longitudinal body; wherein outer surfaces of one or more internal tubes comprise a nucleation enhanced surface modification that promotes a physical deposition of a saturated gas onto said outer surfaces to facilitate formation of said insulative vacuum.