眼内磁性异物B超下磁性试验的临床研究

Clinical study on magnetic tests of 63 cases magnetic IOF-BS under the ultrasonography

通过对６３例（６６眼）眼内磁性异物Ｂ超下磁性试验的临床研究，结果显示：异物存留２周以内者阳性率较高为７１．４％（Ｐ＜０．０５）；位于玻璃体和晶体内的异物阳性率较高为６８．０８％（Ｐ＜０．００５）。而异物的大小及来源对磁性试验的结果无明显影响（Ｐ＞０．５和Ｐ＞０．１）。提示：异物所在位置及存留时间是影响Ｂ超下磁性试验的主要因素。同时分析了对眼内异物手术治疗的指导意义。

Sixty-three cases of the intraocular magnetic foreign (IOMFB) that magnetic tests were done under the B-scan were studied clinically. The results showed that the positive rate of the IOMFBS existing within two weeks was 71 .4%(P < 0.05). The positive rate of the IOMFBS in the vitreous and lenses was 68.08% (P < 0.005).The size and source of IOMFBS didn't affect the results of magnetic tests (P > 0. 5 and P > 0. 1 ) .This suggested that the principal factors affect the results of magnetic test are the position and the existing the of IOFBS. Meanwhile, the significance to direct the operation on IOMFBs was analysed.