Abstract: A vascular stent conveying system includes a housing, an outer cannula, a cleaning tube, an inner cannula, and a driving assembly. The outer cannula is located outside the housing and is connected to a first end of the housing. The cleaning tube is connected to a second end of the housing, a first end of the cleaning tube is located in the housing, and a second end of the cleaning tube extends out of the housing. A part of the inner cannula is located in the housing, a first end of the inner cannula extends into the outer cannula, and a second end of the inner cannula extends from the first end of the cleaning tube to a tube chamber of the cleaning tube. A part of the driving assembly is located in the housing, and operably engaged with a part of the inner cannula located in the housing.

Abstract: A highly retractable intravascular stent delivery system, including a tube assembly and a rotation driving assembly. The tube assembly includes an outer tube 5, an intermediate tube 6, and inner tube 7, wherein an intravascular stent 3 and a stent retaining block 4 are provided within the outer tube 5. The rotation driving assembly includes a housing 9, an outer screw 19, and an intermediate screw 14 located within the housing 9, as well as a driving member. The driving member allows two screws to rotate at opposite directions, so as to drive the outer tube 5 to move toward the proximal end, and the intermediate tube 6 pushes the stent retaining block 4 and the intravascular stent 3 to move toward the distal end. The system uses three-lay tube structure and uses driving gear to drive two screws to move at directions opposite to each other, such that the intermediate tube 6 and the outer tube 5 are driven to move to directions opposite to each other.

Abstract: A vascular stent conveying system includes a housing, an outer cannula, a cleaning tube, an inner cannula, and a driving assembly. The outer cannula is located outside the housing and is connected to a first end of the housing. The cleaning tube is connected to a second end of the housing, a first end of the cleaning tube is located in the housing, and a second end of the cleaning tube extends out of the housing. A part of the inner cannula is located in the housing, a first end of the inner cannula extends into the outer cannula, and a second end of the inner cannula extends from the first end of the cleaning tube to a tube chamber of the cleaning tube. A part of the driving assembly is located in the housing, and operably engaged with a part of the inner cannula located in the housing.

Abstract: A highly retractable intravascular stent delivery system, including a tube assembly and a rotation driving assembly. The tube assembly includes an outer tube 5, an intermediate tube 6, and inner tube 7, wherein an intravascular stent 3 and a stent retaining block 4 are provided within the outer tube 5. The rotation driving assembly includes a housing 9, an outer screw 19, and an intermediate screw 14 located within the housing 9, as well as a driving member. The driving member allows two screws to rotate at opposite directions, so as to drive the outer tube 5 to move toward the proximal end, and the intermediate tube 6 pushes the stent retaining block 4 and the intravascular stent 3 to move toward the distal end. The system uses three-lay tube structure and uses driving gear to drive two screws to move at directions opposite to each other, such that the intermediate tube 6 and the outer tube 5 are driven to move to directions opposite to each other.