结论：该法灵敏度高，准确性、重复性好，可用于外淋巴液中磷酸地塞米松的测定。

Conclusion: the sensibility of the method is high, accurate, and repeatable. It can be used to determine the content of dexamethasone sodium phosphate in perilymph.

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结果圆窗或心内注射给药后，豚鼠外淋巴液、血浆中的DEX浓度随时间的延长呈逐渐下降的趋势；

Results After topical administration or intracardial injection of DEX, concentrations of drug in perilymph and plasma decreased gradually over time.

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