3 results about "Vascular stent" patented technology

The invention provides cardiovascular stent nickel-titanium wire forming equipment. The forming equipment comprises a stepping motor I, a rotating disc, a wire feeding assembly mounting base, a wire feeding assembly, a stepping motor II and a shaping grinding tool, wherein a plurality of circles of circular truncated cone wire hooking columns are fixedly connected to the outer wall of the shapinggrinding tool; the wire feeding assembly comprises a wire feeding mechanical arm, a wire feeding needle, a wire feeding screw assembly, a first connecting base, a second connecting base, a wire feeding motor and a nickel-titanium wire mounting column, and the wire feeding screw assembly comprises a connecting sleeve, a spiral sliding way and a spiral baffle. Active, stable and smooth wire supply can be achieved, and the situations of hooking of wires and the like which are not conducive to production are avoided; by means of the wire feeding screw assembly, the spiral sliding way divides the nickel-titanium wires into strands of wires one by one, and wire winding is avoided; by means of hook plates and the circular truncated cone wire hooking columns, the nickel-titanium wires can slide downwards to the contact surface of the circular truncated cone wire hooking columns and the shaping grinding tool along the circular truncated cone wire hooking columns, the nickel-titanium wires makefull contact with the surface of the shaping grinding tool, and heat shaping is more sufficient.

The invention discloses a vascular stent containing a biodegradable polymer coating, which belongs to the medical field. The preparation method is as follows: step 1, inserting the bacterial strain into a medium for cultivation, and culturing at 25-30°C for 40 hours; Step 2. Inoculate the above-mentioned culture solution into the fermentation medium according to the inoculation amount of 5%, and cultivate it at 25-30°C for 48 hours; Step 3. Centrifuge the above-mentioned fermentation solution for 20 minutes, collect the cells, and heat them in a water bath. Take the supernatant, drain the water, and prepare polylysine; step 4: dissolve 2-amino-3-p-hydroxyphenylpropionic acid monomer and peroxide initiator in an organic solvent to prepare a solution; Secondly, it is mixed with the prepared polylysine powder, and the mixture is grafted and modified by melt grafting reaction equipment to obtain polylysine grafted 2-amino-3-p-hydroxyphenylpropionic acid biodegradable polymer.