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[The physical and chemical changes in the eye structure after sulfurhexafluoride injection into the rabbit vitreous]
Sztarbała1, R Goś, M Góralczyk
1Kliniki Okulistycznej Szpitala Klinicznego WAM w Lodzi.
Aim:
The aim of our paper was to observe the physical and chemical changes in the aqueous humor, lens, gelatous and fluid part of the vitreous body after the sulfurhexafluoride injection into the vitreous body.
Material And Methods:
The New Zealand rabbits were randomized into the control and experimental group which were injected the gas into the vitreous body. The interesting samples were investigated during the 2nd, 7th and 14th day of the experiment. We estimated the volume of the fluid part of the vitreous body, its electrical resistance, the whole protein concentration (in the aqueous humor, lens and vitreous), and electrolite concentration (in the aqueous humor and fluid part of the vitreous body).
Results:
We observed the increase of the fluid fraction in the vitreous body with the increasing of the whole protein concentration, changes in the K+ concentration and decrease of the electrical resistance in the vitreous fluid fraction.
Conclusion:
On the basis of our experimental results we can assume that expanding sulfurhexafluoride gas could mechanically disrupt the vitreous structure. Moreover, the rapid intrabulbar pressure increase after the injection can cause the cilliary body ischaemia and the eye barrier collapse.