Ureteral stent and its testing device

A ureteral stent, comprising a metal stent made of monofilaments and a tubular membrane, wherein

• the tubular membrane is formed by ultrasonic atomization spraying with film covering solution and then curing;
• the tubular membrane is arranged outside the metal stent and connected with the metal stent, and the metal stent is in a wave shape with wave crest and wave trough;
• the metal stent comprises a plurality of unit sections, except the first unit section and the last unit section, a tail end of the unit section is connected with a head end of another unit section;
• or, except the first unit section and the last unit section, a head end of the unit section is connected with a tail end of another unit section;
• center lines of the metal stents are all on a same cylindrical surface;
• and
• an included angle between a plane formed by the head end point of the unit section and a central line of the tubular membrane and a plane formed by the tail end point of the unit section and the central line of the tubular membrane is divided by 360 degrees to obtain a numerical value K1, a distance between the head end point of the unit section and the tail end point of the unit section in a central line direction of the tubular membrane is divided by a distance between the highest point of the wave crest and the lowest point of the wave trough in the central line direction of the tubular membrane to obtain a numerical value;
• K1=n*K2, so that for the plurality of unit sections, wave crest corresponds to wave crest, wave trough corresponds to wave trough, and n is a natural integer between 0 and 10.