2results about How to "Implanted accurately" patented technology

This application provides a stent placement device for cardiac surgery, comprising a cannula with an inlet end and an outlet end; the cannula is divided into 2-3 cannula branches at the inlet end; the cannula accommodates 2-3 stent delivery catheters; one stent delivery catheter is inserted from each cannula branch; all stent delivery catheters exit from the cannula outlet end; each stent delivery catheter has a guidewire lumen and a stent balloon pressure chamber; a guidewire is disposed in the guidewire lumen; a stent implanter is disposed at the tip of the stent delivery catheter, and an ultrasound positioning ball is sequentially disposed at the tip of the stent delivery catheter. This application utilizes a structure consisting of a flexible cannula and multiple stent delivery catheters to conveniently and simultaneously provide precise stent implantation for multiple blood vessels; by incorporating an ultrasound positioning ball with a corner reflector to enhance ultrasound reflection, the implantation and detailed operation of the device can be more easily completed under ultrasound monitoring.

The application provides a twice clamping valve repair device, which comprises a pushing catheter, a chuck assembly and a pre-clamping assembly. The chuck assembly comprises a chuck push rod movably arranged in the pushing catheter, a proximal chuck and a distal chuck which can be opened and closed relative to each other. The pre-clamping assembly comprises an upper clamping piece and a lower clamping piece. The upper clamping piece comprises an upper push rod and an upper clamping part arranged at the distal end of the upper push rod. The lower clamping piece comprises a lower push rod and a lower clamping part arranged at the distal end of the lower push rod. The valve repair device has a working state. In the working state, the upper clamping part has a first clamping surface, the lower clamping part has a second clamping surface, the first clamping surface and the second clamping surface cooperate to clamp the valve leaflet, and the proximal chuck and the distal chuck cooperate to clamp the valve leaflet again. The ratio of the area of the first clamping surface to the area of the valve leaflet and the ratio of the area of the second clamping surface to the area of the valve leaflet are both greater than or equal to 1 / 6 and less than 1, so that the valve leaflet can be prevented from being folded and the effect of the operation can be ensured.