Predicting infusion pressure during pars plana vitrectomy: a physically based model
نویسندگان
چکیده
منابع مشابه
Ocular perfusion pressure during pars plana vitrectomy: a pilot study.
PURPOSE Unexplained visual field loss after pars plana vitrectomy (PPV) has been reported in up to 14% of all uncomplicated cases with signs varying from visual field defect and disc pallor, to optic atrophy, loss of vision, and phthisis bulbi. Among the postulated pathogenic mechanism is ocular hypoperfusion due to insufficient blood pressure (NBP) and/or elevated IOP, or to their mismatch. Th...
متن کاملMeasurement of ophthalmodynamometric pressure with the vented-gas forced-infusion system during pars plana vitrectomy.
PURPOSE To measure ophthalmodynamometric pressure (ODP) with the vented-gas forced-infusion (VGFI) system during vitrectomy in patients with various vitreoretinal disorders and to investigate factors related to ODP. METHODS This study included 169 eyes of 169 patients undergoing pars plana vitrectomy. After core vitrectomy, the intraocular pressure was gradually raised by using the VGFI syste...
متن کاملSmall Gauge Pars Plana Vitrectomy
Although the history of ophthalmic surgery can be dated back thousands of years with operations to treat cataracts, surgery involving the vitreous cavity has only been reported for less than 50 years. The initial description of major vitreous surgery was introduced by David Kasner in 1969 (Kasner, 1969). He described excision removal of the vitreous using a sponge and scissors, under an open sk...
متن کاملSclerotomy for pars plana vitrectomy.
Closed vitrectomy has largely supplanted the 'open sky' method, particularly because it results in minimal interference with the integrity of the globe. Ideally the pars plana sclerotomy should be sufficiently watertight to allow the intraocular pressure to be maintained during surgery without impeding free movement of the vitrectomy instrument within the eye. We describe a sclerotomy technique...
متن کاملBilateral subcutaneous emphysema from pressurized infusion during pars plana vitrectomy: a case report.
OBJECTIVES To report a case of extensive subcutaneous emphysema introduced during vitrectomy while using an advanced feedback-controlled pressurized infusion system. METHODS Clinical case report of a 56-year-old woman undergoing pars plana vitrectomy for rhegmatogenous retinal detachment of the left eye. The clinical and radiologic findings of the patient's eyes were documented. The mechanism...
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ژورنال
عنوان ژورنال: Modeling and Artificial Intelligence in Ophthalmology
سال: 2019
ISSN: 2468-3930,2468-3922
DOI: 10.35119/maio.v2i3.96