The Changes of Vitreous pH Values in an Acute Glaucoma Rabbit Model
| Autor: | Charn-Jung Chang, Da-Wen Lu, Jian-Nan Wu |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Male
Intraocular pressure medicine.medical_specialty genetic structures Eye disease Retina Xylazine Retinal Diseases Ophthalmology Animals Medicine Pharmacology (medical) Ketamine Hyaluronic Acid Intraocular Pressure Pharmacology Lagomorpha Cell Death biology business.industry Acute glaucoma Glaucoma Hydrogen-Ion Concentration medicine.disease biology.organism_classification eye diseases Sclera Vitreous Body Disease Models Animal Sodium Bicarbonate medicine.anatomical_structure Acute Disease Rabbit model Ocular Hypertension Rabbits sense organs Acidosis business medicine.drug |
| Zdroj: | Journal of Ocular Pharmacology and Therapeutics. 17:343-350 |
| ISSN: | 1557-7732 1080-7683 |
| Popis: | The changes of vitreous pH values under acute glaucoma status have never been reported. In this study, we measured the changes of vitreous pH values in an acute glaucoma rabbit model. Under ketamine and xylazine anesthesia, the anterior chamber of the right eye of New Zealand white rabbits was cannulated and connected to a polygraph for continuous intraocular pressure (IOP) monitoring and a mini-pump for persistent injection of viscoelastic substance, Healon GV. The measurement of vitreous pH was done by inserting a pH probe via a third opening through the sclera into the vitreous. Different IOP levels were maintained by varied amounts of Healon GV injections into the anterior chamber. The changes of vitreous pH values following the intracameral injections were recorded and evaluated. The changes of vitreous pH values were minimal when IOPs were maintained at lower than 35 mmHg. Vitreous pH values decreased significantly from 7.32 to less than 7.03, when the IOPs were kept at 70 mmHg or higher. However, the decrease of pH values was reversible if IOP was held at 70 mmHg for less than 10 minutes and then reduced to normal level at once. In addition, with MTT viability assay, it was noted that the decrease in vitreous pH was associated with a higher percentage of retinal cell death. |
| Databáze: | OpenAIRE |
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