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Abstract #25538 Published in IGR 12-1
Does stellate ganglion block effects intraocular and ocular perfusion pressures?
Ergin A; Dere K; Orhan M E; Uysal YJournal of Chinese Clinical Medicine 2009; 4: 626-629
Objective: The effects of stellate ganglion block (SGB) on the blood flow of optic nerve head and peripapillary retina, which plays an important role in the pathogenesis of a major blinding disease, e. g. glaucoma, are unclear. The purpose in this study was to evaluate the acute effects of SGB on intraocular pressure (IOP) and ocular perfusion pressure (OPP). Methods: Thirty patients between 22 and 30 years and ASAI with complex regional pain syndrome (CRPS) who underwent SGB were enrolled in this study. Using the ablation tonometry, intraocular pressures were measured before, and 10 min, 30 min, 90 min after SGB in both eyes. Also mean blood pressure (MBP), and heart rate (HR) were simultaneously measured. SGB was performed by injecting 0.25% bupivacaine hydrochloride (7 ml) into the vicinity of the seventh cervical vertebra. Results: The IOP in the blocked side significantly decreased between 30 min and 90 min following SGB, compared to the baseline values. The OPP was significantly increased after 30 min in the blocked side and continued to 90th min, but there was no significant change in IOP, OPP, MBP or HR throughout the treatment period in the unblocked side. Conclusions: SGB decreased IOP and increased OPP in the blocked side while there was no significant change in the unblocked side. Therefore, SGB may have beneficial effects on the ocular diseases associated with ischemia of the optic nerve head and the peripapillary retina, e. g. glaucoma.
K. Dere. Department of Anesthesiology, GATA, Haydarpasa Medical Faculty, 34668 Istanbul, Turkey. kamerdere@hotmail.com
Classification:
6.11 Bloodflow measurements (Part of: 6 Clinical examination methods)
