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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/3106

Title: Ocular blood flow before, during, and after vitrectomy determined by laser speckle flowgraphy.
Other Titles: レーザースペックルフローグラフィーを用いて測定した硝子体手術の術前、術中、術後の眼血流
Authors: Okamoto, Masahiro
Matsuura, Toyoaki
Ogata, Nahoko
Keywords: Laser speckle flowgraphy
Ocular blood flow
Vitreous surgery
lntraocular pressure
Issue Date: Mar-2014
Publisher: Slack Incorporated
Citation: Ophthalmic surgery, lasers & imaging retina Vol.45 No.2 p.118-124 (2014.03)
Abstract: BACKGROUND AND OBJECTIVE: Vitrectomy markedly alters the intraocular milieu, which can then affect the physiology of the retina and choroid. This study investigates whether vitrectomy also alters ocular blood flow as determined by laser speckle flowgraphy (LSFG). PATIENTS AND METHODS: Twenty eyes of 20 patients that underwent vitrectomy for idiopathic macular hole or epiretinal membrane were studied. Standard 23-gauge microincision vitreous surgery was performed. Ocular blood flow of the optic nerve head, retinal vessels, and choroid was determined by LSGF before, during, and 2 weeks and 1 month after vitrectomy. RESULTS: Postoperative blood flow of the optic nerve head, retinal vessels, and choroid did not differ significantly from preoperative values. Intraoperative blood flow of the optic nerve head and retinal vessels decreased significantly from baseline with increasing infusion pressure from 20 mm Hg to 40 mm Hg (P < .01), and choroidal blood flow decreased significantly when the infusion pressure increased from 8 mm Hg to 20 mm Hg and from 20 mm Hg to 40 mm Hg (both P < .01). CONCLUSION: Blood flow did not differ significantly postoperatively versus preoperatively, but it was significantly reduced during vitrectomy with increasing infusion pressure. Careful attention should be paid to infusion pressure during vitrectomy.
Description: 博士(医学)・乙第1368号・平成27年11月27日
Copyright ©2014, SLACK Incorporated. All Rights Reserved.
The definitive version is available at " http://dx.doi.org/10.3928/23258160-20140306-04 "
URI: http://hdl.handle.net/10564/3106
ISSN: 23258160
Academic Degrees and number: 24601B1368
Degree-granting date: 2015-11-27
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2015年度

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