| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a freezing apparatus which can be manufactured even if the triple tube has a small diameter which makes the manufacture difficult, and has a good operability while being a living body freezing apparatus which is directly inserted to the lesion in a living body from the outside of the living body by making no incision on the abdomen. <P>SOLUTION: This living body freezing apparatus has the triple tube structure which is formed of a flexible member and is constituted by arranging an internal tube 2, an intermediate tube 3 and an external tube 4 in order from the inside. A vacuum heat-insulating layer is formed by intracelial a ring-like space 13 between the external tube and the intermediate tube. At the same time, a liquid coolant which is jetted out from a liquid coolant introducing passage 11 on the inside of the internal tube is expanded and vaporized in a probe rear surface side space 6 which is arranged on the distal end side of the triple tube and is formed of a good heat-conductive object made of a metal. Then, the vaporized coolant is discharged from a discharging passage 12 between the intermediate tube 3 and the internal tube 2 for the living body freezing apparatus. In the living body freezing apparatus, a ring-like supporting member 20 which seals the distal end of the vacuum heat-insulating layer is installed, and the internal tube 2 is extended more than the distal end side of the ring-like supporting member 20. At the same time, a covering tube which covers the outer periphery of the internal tube of the extended section through a gap is installed, and a double-tube section 10 is formed. Then, the space between the internal tube and the covering tube is made into a part of the discharging passage for the vaporized coolant. <P>COPYRIGHT: (C)2009,JPO&INPIT |
