Hydrogel Qualities of the Vitreous

Sallmann, L.

doi:10.1001/archopht.1941.00870170062005

Archives of Ophthalmology

1941

DOI: 10.1001/archopht.1941.00870170062005

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Hydrogel Qualities of the Vitreous

L. Sallmann¹

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1945

1982

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Cited by 6 publications

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“…not yet completely clear, although a few reports are available (Friedenwald & Stiehler 1935;Von Sallmann 1941;Balazs 1961;Bettelheim & Wang 1976). Its physicochemical properties in pathologic conditions are especially unknown.…”

mentioning

confidence: 99%

Effects of Biological Stimuli on the Viscosity of the Vitreous

Honda

Negi

1982

Acta Ophthalmologica

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Changes in the physical properties of the vitreous induced by various biological stimuli were investigated with Cannon-Fenske kinematic and cone-plate rotary viscometers. Heating greatly decreased the viscosity of the human vitreous, the critical temperature being between 50 degrees C and 60 degrees C. Freezing also affected the viscosity, but less so than heating. Viscosity of hyaluronic acid was also decreased by heating to approximately 60 degrees C. Preliminary incubation with hyaluronidase made the viscosity of both the vitreous and hyaluronic acid heat-stable. Lens extraction decreased vitreous viscosity markedly, suggesting a decrease of hyaluronic acid concentration and/or a lowering of hyaluronic acid molecular weight. Vitreous haemorrhage resulted in decreased vitreous viscosity. Cryoretinopexy at the level employed in this study induced little change in vitreous viscosity, while retinal diathermy caused a moderate decrease. In the course of vitreous haemorrhage and retinal diathermy, a return towards normal of the viscosity was observed, suggesting the presence of local hyaluronic acid production.

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mentioning

confidence: 99%

Effects of Biological Stimuli on the Viscosity of the Vitreous

Honda

Negi

1982

Acta Ophthalmologica

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Hydrogen Ion Concentration of the Vitreous in the Living Eye

Sallmann¹

1945

Archives of Ophthalmology

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Effects of thermal load on ion release of the rabbit vitreous body

Honda

Ogino

Asayama

et al. 1981

Albrecht von Graefes Arch. Klin. Ophthalmol.

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Ion-release of the rabbit vitreous body through a dialysis membrane against water was studied. To evaluate one of thermal changes in the vitreous properties, the vitreous was heated or cooled before dialysis. The average wet weight of the normal vitreous was 1.61 +/- 0.20 g and dry to wet weight ratio was 1.33 +/- 0.04%. The dry weight, sodium, potassium, and chloride concentrations of the vitreous were decreased as an exponential function curve by dialysis. A decreasing ratio was prominent in the heated vitreous, the frozen vitreous and the non-thermo-treated (control) vitreous in turn. Calcium and magnesium release from the rabbit vitreous body was slow and differences among the heated, frozen and non-thermo-treated vitreous bodies were not significant, suggesting some different capture-mechanisms between the monovalent and bivalent ions.

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Hydrogel Qualities of the Vitreous

Cited by 6 publications

References 6 publications

Effects of Biological Stimuli on the Viscosity of the Vitreous

Effects of Biological Stimuli on the Viscosity of the Vitreous

Hydrogen Ion Concentration of the Vitreous in the Living Eye

Effects of thermal load on ion release of the rabbit vitreous body

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