| 摘要 |
PROBLEM TO BE SOLVED: To improve a stent graft, and a delivery system and a delivery method thereof.SOLUTION: The stent graft includes: a tubular graft provided with a proximal end and a distal end; and a support stent, at least a portion of which lies within the graft, provided with a proximal end and a distal end. The support stent includes a wire having a first helical wire portion having a first translational direction and a second helical wire portion having an opposite second translational direction. The support stent has a first length when in a compressed delivery configuration, and has a shorter second length when in an expanded deployed configuration. When in the delivery configuration, the support stent is connected to the graft at or near the proximal end of the graft. A fixing mechanism is provided at or near the distal end of the graft and is engaged with the support stent in the deployed configuration to fix the diameter and length of the support stent. |
