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Abstract
Abstract
Comparative Rating of Ocular Hemodynamics by Langham-OBF and Colour Doppler Imaging
Wiermann A., Zeitz O., Matthiessen E. T., Richard G., Klemm M.
Dept. of Ophthalmology, Hamburg University
Purpose: Several methods are available for determination of ocular hemodynamics. Aim of the present study was to compare on a clinical level how ocular perfusion is rated on basis of the results obtained by the method of Langham (LOBF) and on basis of color Doppler imaging (CDI) measurements.
Method: In 147 patients one eye that was clinically suspicious to have disorders of ocular perfusion was prospectively examined by CDI and LOBF within one day. LOBF evaluates ocular pulse amplitude and was performed with a standard set-up. For CDI measurements a Siemens Elegra system with a 7.5L40 transducer was used. Peak systolic velocity and enddiastolic velocity was measured in the ophthalmic artery as well as in one short and one long posterior ciliary artery. Resistive index was calculated. Measurements were rated by comparison with the authors normal values and were compared with the rating revealed from LOBF-measurements.
Results: After LOBF-measurements ocular perfusion appeared to be normal in 138 individuals and abnormal in 9 individuals. In contrast, judgment of ocular perfusion by CDI revealed normal hemodynamics in 30 individuals only. In 40 cases a slight and in 77 cases a severe alteration of ocular perfusion was observed by CDI. LOBF and CDI results correspond in 26.6% of the patients. In 73.5% LOBF revealed normal ocular perfusion, while alterations of ocul