Desenvolvimento de protótipo para sistema intrauterino liberador de levonorgestrel a partir de um sistema comercial.

Abstract

The Intrauterine System (IUS) Drug is a hormonal contraceptive system that is placed inside the uterus and releases a progestin. This system is adapted to the normal uterus, however, it is also used in uterus underwent endometrial ablation. Therefore, obtaining the biomaterial is necessary to be able to adapt to the new intrauterine space, as an alternative to hysterectomy in order to control abnormal uterine bleeding. Before the above, this study aimed to develop a prototype for releasing intrauterine system levonorgestrel from the characterization of a trading system to be used in women who underwent endometrial ablation. Initially it was performed to characterize commercial SIU and then used the low molecular weight polyethylene, for clothing of the prototypes. The commercial SIU was characterized by X-Ray Diffraction (XRD), Infrared Spectroscopy in Region Fourier Transform (FTIR), Scanning Electron Microscopy (SEM), Spectroscopy Energy Dispersive X-ray (EDS), Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). It has been observed through tests that characterize commercial SIU is composed of polyethylene and silicone. The drug is dispersed in a silicone matrix. The prototype was made of polyethylene and shaped similar to the uterus underwent endometrial ablation. Thus one can conclude that it is possible to get a SIU adapted to the uterus of women undergoing endometrial ablation.