Preparation method of PLLA/HA composite scaffold and application of PLLA/HA composite scaffold in tracheal stent

[0022] A preparation method of PLLA / HA composite support, the preparation process is as follows:

[0023] 1) Use 3D design software to design bracket models and molds;

[0024] 2) Preparation of PLLA / HA film;

[0025] Wherein, using chloroform as a solvent, add 4.0g PLLA and 1.0g HA in the reaction vessel, the volume concentration is 10%g / mL; After 24 hours of magnetic stirring at constant temperature, a suspension solution is formed, and after pouring into the film-forming device, Place it in a blast drying oven for 48 hours; volatilize to remove air bubbles and make a PLLA / HA film.

[0026] 3) Using the PLLA / HA film made in 2) to make a pre-stent;

[0027] Among them, the PLLA / HA film prepared in 2) was cut into filaments with a cross-section of 1.0 mm×1.0 mm, and pre-stents with a length of 80 mm and diameters of 20-26 mm were made on a mold.

[0028] 4) Prepare PLLA / HA spinning solution;

[0029] Among them, chloroform was used as a solvent, and 4.0 g PLLA a

[0034] On the basis of Example 1, the PLLA / HA composite stent is applied to a tracheal stent.