Objective To evaluate the cellular toxic and release of pharmaceutical dressing. Methods Following the State standard GB/T14233.2-2005, the L929 cellular morphology was observed by inverted microscopy after 72h and proliferation of the cells was examined using mitochondrial function (MTT) assay. Relative growth rate (RGR) was calculated and cytotoxicity grade was evaluated. With PBS7.4 as dissolution media, and (32±0.5)℃ as dissolution temperature, the release rate was determined with UV method with the determination wavelength of 288nm and the dissolved liquid in1/6, 1/2, 1, 3, 16, 24, 36 and48h. Results The average cell RGR of the pharmaceutical dressing was 91.25% and reached 1 grade. L929 cellular morphology was normal. Pharmaceutical dressing release accord to Higuchi equation，and the simulated equation is Mt/M∞＝0.3271t0.239. Conclusion Biologic compatibility of the pharmaceutical dressing is good, and the release of levofloxacin from the pharmaceutical dressing is sustained in vitro.
HUANG Shu-jie, GUAN Jing, LI Zhi-hong, ZHANG XI-zheng, WU Ji-min. Evaluation of in vitro cytotoxicity and drug release property on pharmaceutical dressing[J]. Journal of medical biomechanics,2010,25(1):32-35Copy