Method for producing biodegradable external stents intended for putting over blood vessels and the biodegradable external stent intended for putting over blood vessels, obtained by this method

摘要

The subject of the notification is the biodegradable external stent,intended for blood vessels,in cylindrical tube form,which includes the ribbing of both the outer and the inner surface of the stent wall,where in the longitudinal section of the stent, the ribbing of the wall is close to the sinus profile,whose two backs are at a distance corresponding to the jump of the spring on the cylinder,where the diameter of the rib (g) is in the range of 6,5 to 13,5% of the inner diameter (d) of the stent,the leap of the rib fertiliser (s) is within the range of 200 to 800% the diameter of the rib (g),and the angle of the manure is essentially the same for the entire length of the manure,where the walls of the stent are made of fibrous material containing the fibrous material,biodegradable aliphatic polyester and protein biopolymer,of which fibres,the biodegradable aliphatic polyester has an in vivo biodegradation time of no less than six months,the beneficial decomposition products do not give rise to an inflammatory reaction. The report shall also cover the production of biodegradable external stents for blood vessels,(a) preparation of the fibre solution,biodegradable aliphatic polyester and protein biopolymer in an organic solvent,of which fibres,the biodegradable aliphatic polyester has an in vivo biodegradation time of no less than six months,where the beneficial decomposition products do not give rise to an inflammatory reaction,(b) the electro -filament of the textile solution referred to in points (b). (a)using a low -voltage high voltage generator,the dosing pump of the listed fibre solution,rotary collector,Whereas the active fibre collection function is to combat the spiral -ribbed surface,where the diameter of the rib (g) i s in the range of 6,5 to 13,5% the diameter of the cylinder (d) and the leap of the liner (s) i s in the range of 200 to 800% the diameter of the rib (g) and the angle of the liner i s essentially the same throughout the liner length. The notification also concerns the biodegradable external stent produced in this way.