眼内微小磁性异物早期简易定位电磁铁吸出术

目的探讨眼内微小磁性异物早期简易定位及电磁铁吸出术的优点。方法眼内微小磁性异物伤后48h内17例（17只眼）。置角膜吸附型眼内异物定位器X线下正侧位摄片定位，在睫状体平坦部距异物最近处全层切开4～5mm，板层缝线牵引切口，电磁铁头部贴于切口吸出异物。结果电磁铁一次吸出异物15例，1例仅切开巩膜未能吸出，后切开睫状体平坦部后顺利吸出；1例异物嵌入巩膜壁内，后从结膜侧眼球外进路用镊夹出异物。本组病例术后无感染等并发症。结论早期简易定位电磁铁吸出眼内微小磁性异物，手术简易快捷，创伤小，未发生感染。在暂未开展玻璃体切除术的单位，可以作为早期后段眼内微小磁性异物摘出的首选方法。

Early extraction of small magnetic intraocular foreign boby with electromagnet after simple X-ray localization

Objective To explore the advantage of early extraction of small magnetic intraocular foreign body（IOFB）with electromagnet after simple X-ray localization. Methods seventeen eyes of 17 cases with small magnetic IOFB were enrolled in the study. The IOFB was shown by anteroposterior and lateral radiographs with IOFB locator adhered to the cornea. The pars plana closest to the foreign body was incised 4 5 mm, then the incision was pulled by lamellar suture and IOFB was extracted by the electromagnet. Resuits The IOFBs were extracted in 15 cases by one surgery. In one failed case,the IOFB was not taken out because the uvea was not incised completed and the IOFB was extracted after the urea was incised. In another failed case, the IOFB was embedded in the sclera which was extracted by the forceps through the conjunctiva. No infection was observed in all cases. Conclusion Early extraction of small magnetic IOFB with electromagnet after simple X-ray localization has been fast, simple and minimally invasive with high success rate and low infection rate.