Abstract: In an embodiment, a cryoablation probe includes a shaft, where the shaft has a supply tube, a return tube surrounding the supply tube, an insulated portion, wherein a vacuum circuit runs through the insulated portion between the return tube and an insulating shaft, and an expansion chamber extending distally to the insulated portion. The probe further includes a distal tip configured to seal a distal end of the return tube. The distal tip has a tip portion extending distally from the distal end of the return tube and a plug portion configured to be inserted inside of the return tube. The probe includes a compressive element surrounding the return tube and the plug portion of the distal tip, configured to seal the distal tip to the return tube.