97th DOG Annual Meeting 1999
P465
THE DETERMINATION OF RETINAL OXYGEN SATURATION ALONG THE RETINAL VESSELS.
M. Scibor1, G. Michelson1, D. Schweitzer2, M. Hammer2, E. Thamm2
Purpose:The measurement of oxygen saturation in arterioles and venoles along the retinal vessels
Method: The determination of oxygen saturation was
performed using the imaging spectrometer, developed in Jena. Different
extinction spectra of hemoglobin and oxyhemoglobin create the basis for the
non-invasive estimation of the oxygen saturation. The measurements of the
reflectance spectra were performed in a wavelength range from 400 nm to 700 nm.
The retinal oxygen saturation was measured with an entrance slit of 1.5 mm,
spectral resolution of D(lambda) < 2m, and local resolution Ds < 20µm.
We measured 6 healthy eyes in 5 healthy persons at 5 variable distances from optic disc corresponding in retinal arterioles and venoles.
Results: In retinal venoles we observed a increasing of retinal oxygen saturation with the extensive distance from the optic disc. In retinal arterioles the oxygen saturation shows in average the same values 91%±5%.
Conclusions: The retinal oxygen saturation in arterioles shows no significant differences at variable distances from the optic disc. In venoles we observed a recognizable increasing of oxygen saturation with extensive distance from the optic disc.
1 Augenklinik mit Poliklinik, Universität Erlangen-Nürnberg, Erlangen
2 Augenklinik mit Poliklinik, Universität Jena, Jena
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