4 results about "Stent design" patented technology

The application discloses a steel pipe arch rib installation support design method and system considering load combination, and the method comprises the following steps: firstly, defining arch rib installation multi-source load and dividing standard combination and basic combination, establishing a support and arch rib collaborative stress integral analysis model, combining arch rib segments and bridge surface constraints to determine support topology, and configuring component parameters to form an initial scheme; secondly, extracting time-varying load effects at each construction stage, constructing a multi-objective optimization function model, and determining a global optimal objective function; then, establishing a coupling relationship between support deformation and arch rib linear, and solving optimal pre-camber through inverse analysis iteration to eliminate linear error; finally, carrying out multiple checking on the support, optimizing rod parameters and structure in combination with buckling analysis, establishing a collaborative mechanical model to complete whole-process checking, and determining final design parameters. The method realizes dual protection of arch rib installation precision and structural stability.

The utility model discloses an appendix support, including leading in device, moving device and support, the movable moving device is arranged in the leading in device, the output of leading in device is provided with the support, the moving device can drive the support to export outward through leading in device, above all, can prevent the component unexpected and hurt that comes out, can carry out the fine adjustment of support to the support design and fit appendix lumen structure, can better fixed, and the device simple operation realizes the single -handed operation of main knife doctor, and the other hand can operate endoscope, need not auxiliary tool, improve operation efficiency and accuracy.

Medical stent designs are disclosed. An example stent includes a tubular scaffold having a proximal end and a distal end. The tubular scaffold includes a first filament extending between the proximal end and the distal end, the first filament including a first biodegradable region positioned adjacent to a second biodegradable region. Further, the first biodegradable region includes a first biodegradable material, the first biodegradable material having a first rate of degradation. The second biodegradable region includes a second biodegradable material, the second biodegradable material having a second rate of degradation, wherein the first rate of degradation is different from the second rate of degradation.

The present invention relates to a precision automated system, particularly for robot-assisted minimally invasive surgery, comprising an instrument holder with five degrees of freedom adapted to support and actuate a tool, especially a surgical tool, for accessing difficult areas of the surgical field. The instrument holder comprises a shaft terminating in a controlled flexible portion and a tool holder including means for orientation and rotation, all of these movements being controllable independently of each other. The instrument holder's design features provide it with the rigidity necessary for manipulating tissues within the surgical field during the execution of a surgical procedure.The instrument holder is designed to be mounted on a robot with up to 6 degrees of freedom, also including a module with motors to drive the 5 degrees of freedom of the instrument holder, which itself does not contain sensitive electronic components and can be sterilized by various techniques. Figure 1.