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H. Tsukitome, K. Ikesugi, K. Matsunaga, M. Sasoh, Y. Uji; Comparison of Quantitative Analysis of Anterior Chamber Between a Novel Ultrasound Biomicroscopy (UD-6010) and a Former Ultrasound Biomicroscopy (Model 840). Invest. Ophthalmol. Vis. Sci. 2008;49(13):5090.
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© ARVO (1962-2015); The Authors (2016-present)
The recently introduced ultrasound biomicroscopy(UBM) UD-6010 is equipped with functions to quantitatively assess the structure of the anterior chamber, such as angle opening distance at 250 µm and 500 µm(AOD250 and AOD500), trabecular iris angle (TIA) and angle recess area (ARA). These measurements taken by the UD-6010 were compared to those taken by the widely used UBM machine model 840, to investigate reproducibility.
Twenty eyes of 20 consenting outpatients who visited our hospital were examined. Each eye was examined using both the UD-6010 and model 840 machines. The following measurements were made at the temporal anterior chamber angle 5 times: AOD500; AOD250; and ARA. With each parameter, after excluding maximum and minimum values, the remaining 3 measurements were averaged. With the UD-6010, the attached automatic analysis software was used, and with the model 840, UBM Pro2000 software was used.
For the UD-6010 and model 840, AOD250 was 0.27±0.12 mm and 0.33±0.12 mm, AOD500 was 0.43±0.20 mm and 0.45±0.18 mm, and ARA was 0.28±0.14 mm2 and 0.33±0.12 mm2, respectively (mean±SD). While no significant differences were seen in AOD500 between machines, significant differences in AOD250 and ARA were identified (p<0.05, paired t-test).
AOD250 and ARA were significantly larger for the model 840 than for the UD-6010. The model 840 is no longer commercially available. The UD-6010 is a second-generation UBM, and compared to the existing machine, the smaller probe improves operability and measurements can be taken automatically. However, caution must be exercised when directly comparing data obtained from the model 840 and UD-6010.
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