Methods: The porus delayed-released material was made by salt-leaching method, whose carrier was PLGA and calcium sulfate, and its properties was evaluated.

• 方法：以硫酸钙、PLGA为载体，用有机溶剂注模法制造多孔缓释材料并检测其药物稳定性、孔隙率、孔径等相关性能。