| 摘要 |
A medical instrument to be used for delivering an indwelling vascular stent to a blood vessel. The medical instrument is provided with an outer tube, said outer tube comprising a first lumen for housing therein the stent in a contracted state and a second lumen for passing therethrough a refrigerant for cooling the stent in the contracted state. The stent is in a tubular shape and configured of a super-elastic metal which enables the expansion of the stent due to the elastic force of the stent per se. The medical instrument can lower the expansion force of the stent by cooling down the stent with the refrigerant to the transformation temperature of the super-elastic metal or lower. |
