J Korean Ophthalmol Soc.  2010 Jan;51(1):106-111.

Clinical Significance of Ultrasound Biomicroscopy in Early Stage of Traumatic Hyphema

• Chang DH
• Lee P
• Lee SC
• Jin KH

Abstract

PURPOSE
To evaluate the clinical significance of angle-opening distance 500 (AOD500) using ultrasound biomicroscopy (UBM) in the early stage of traumatic hyphema.
METHODS
The participants of this study were 46 hospitalized traumatic hyphema patients. We measured the quantity of initial blood clotting using a slit-lamp and the range of angle recession, AOD500 using UBM and then reviewed the relationship between the two.
RESULTS
The difference of AOD500 in the traumatic and the non-traumatic eye measured by UBM at admission increased significantly in the wider recessed angle group (p=0.008), but did not increase at a statistically significantly level in the larger initial blood clot grade group (> or =Grade 2).
CONCLUSIONS
These results suggest that the measurement of the angle-opening distance of both eyes using UBM will aid in evaluating the range of angle recession in patients in the early stage of traumatic hyphema.

Keyword

Angle-opening distance 500 (AOD 500); Traumatic hyphema; Ultrasound biomicroscopy (UBM)

MeSH Terms

Blood Coagulation
Eye
Humans
Hyphema
Microscopy, Acoustic

Figure

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  Figure 1. Ultrasound biomicroscopic image of the anterior chamber and the definition of angle-opening distance at 500 μm from the scleral spur (AOD500).

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  Figure 2. The photographs of the anterior segment and ultrasound biomicroscopy (UBM) in 2 traumatic hyphema patients (A, B). The angle recession (short arrow) was seen in UBM photograph at 12 and 3 o'clock (in the middle upper and lower photograph). The blood clot (long arrow) is well-visualized in the UBM photograph at 6 o'clock (in the right upper and lower photograph).

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  Figure 3. The grade of angle recession and angle opening distance 500 (AOD500) (μm). The difference of AOD500 in traumatic & nontraumatic eye measured by UBM at admission were increased statistically significantly in larger area recessed angle group (p=0.008).

Reference

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