摘要
目的 评价修改相应参数后A型超声直接测量硅油填充眼眼轴长度的临床应用效果。方法 将超声波在玻璃体中的传播速度1532m／s改设为在硅油中的传播速度987m／s后，对11例有晶状体硅油填充眼，按A型超声其他默认参数，在“Phakic、Auto＋Save”模式下自动测得眼轴长；13例无晶状体硅油填充眼，在“Aphakic、Manual”模式下，手动测得眼轴长。取平均值，用SRK-T公式计算出IOL度数。硅油取出联合IOL植入术后3个月，在“Acrylic、Auto＋Save”模式下，按A型超声其他默认参数，自动测量眼轴；并测定术后屈光度。结果11例有晶状体硅油填充眼术前眼轴测量值23．94～28．68（平均25．74±1．65）mm；实际眼轴值23．60～28．94（平均25．68±1．73）mm。实际眼轴与术前测量值的差值为-0．51～0．36（平均-0．06±0．30）mm，二者间差异，无统计学意义。13例无晶状体硅油填充眼术前眼轴测量值23．86～28．70（平均25．89±1．50）mm；实际眼轴值23．92～28．52（平均25．82±1．38）mm。实际眼轴与术前测量值的差值为-0．45～0．54（平均-0．07±0．29）mm，二者间差异，无统计学意义。硅油取出联合IOL植入术后，两组屈光度分别为-1．25～1．75（平均-0．07±1．09）D、-2．00～2．25（平均0．31±1．35）D；二者间差异，无统计学意义。结论将超声波在玻璃体中的传播速度改设为在硅油中的传播速度后，再按A型超声其他默认参数，有晶状体眼在。Phakic、Auto＋Save”模式下自动测量、无晶状体眼在“Aphakic、Manual”模式下手动测量，是获得硅油填充眼眼轴值较为准确、快速、实用、价廉的方法，值得推广应用。
Objective To evaluate the accuracy of A-ultrasOnic scan surveying the axis length of eyes with silicone oil tamponade. Methods 24 eyes that had undergone the operation of silicon oil tamponade were examined by Aultrasonic scan to measure the axis length-11 eyes with lens by the mode of ＂Phakic. Auto ＋ Save＂; 13 eyes without lens by the mode of ＂Aphakic. Manual＂. The velocity of the beam in a silicone oil-filled vitreous cavity was changed to 987 m/s to eliminate the axial length magnification caused by the silicone oil. The SRK-T formula was used for intraocular lens calculation. After the operation of silicone oil removal combined with intraocular lens implantation 3 months, the actual axis length （ by the mode of ＂Acrylic. Auto ＋ Save＂ ） and the final refraction were measured. Results In 11 eyes with lens, the A-ultrasonic scan measurement was （25.74 ± 1.65）mm （range, 23.94 to 28.68rnm）, the actual axis length was （25.68 ±1.73）mm （range, 23.60 to 28.94 mm）. The difference of their measurements ranged from -0.51 to 0.36mm （average, -0.06±0.30 mm）, but without statistically significant （P〉0.05）. In 13 eyes without lens, they were （25.89 ± 1.50）mm （range, 23.86 to 28.70mm） and （25.82 ±1.38）mm （range, 23.92 to 28.52mm） respectively. The difference of their measurements ranged from -0.45 to 0.54mm （average, -0.07 ± 0.29mm）, but without statistically significant （P〉0.05）. too. Two groups＇ mean final refraction were -0.07 ± 1.09 diopters （range, - 1.75 to 1.25 diopters） and 0.31± 1.35 diopters （range, -2.00 to 2.25 diopters） respectively. The difference is not statistically significant （P〉0.05）. Conclusion After the sound speed in vitreous cavity changed to 987 m/s, it is an exact, expeditous, practical, inexpensive method that A-ultrasonic scan surveying the axis length of eyes with silicone oil tamponaxle-eyes with lens by the mode of ＂Phakic, Auto ＋ Save＂; eyes without lens by the mode of ＂Aphakic, Manual＂.
出处
《中国实用眼科杂志》
CSCD
北大核心
2007年第6期595-599,共5页
Chinese Journal of Practical Ophthalmology
关键词
硅油
眼轴
A型超声
Silicone oil
Eye axis length
A-ultrasonic scan
