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Y. Sugiura, F. Okamoto, Y. Okamoto, T. Oshika; Measurement of Ophthalmodynamometric Pressure Using Vented Gas Forced Infusion System During Pars Plana Vitrectomy. Invest. Ophthalmol. Vis. Sci. 2010;51(13):3589.
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© ARVO (1962-2015); The Authors (2016-present)
To develop a new method to measure ophthalmodynamometric pressure (ODP) during vitrectomy in patients with various vitreoretinal disorders and to investigate factors related to ODP.
This study included 169 eyes of 169 patients undergoing pars plana vitrectomy. After core vitrectomy, the intraocular pressure was gradually raised using Vented Gas Forced Infusion (VGFI) system. When the central retinal artery or its branches on the optic nerve head showed pulsations, the pressure was recorded as ODP. Systolic blood pressure (SBP) and diastolic blood pressure (DBP) were measured at the time of ODP measurement. Multiple regression analysis was performed to investigate the relationship between various explanatory variables and ODP. Explanatory variables tested were DBP, SBP, age, presence of diabetic mellitus (DM) and hypertension (HT), body mass index, and serum total cholesterol.
ODP was 66.9 ± 12.5 mmHg (range 15.5 - 103.7 mmHg). Simple regression analysis showed that ODP significantly correlated with DBP (r= 0.598, p < 0.0001), but not with SBP (r = 0.119, p = 0.123). ODP in DM group was lower than that in non-DM group, while DBP was not significantly different between two groups. Similar results were obtained about HT. Multiple regression analysis revealed that ODP had a significant correlation with DBP (p < 0.0001), presence of DM (p = 0.022) and presence of HT (p = 0.031).
We developed a new method to determine ODP using VGFI system. ODP was significantly associated with DBP. ODP was lower in patients with DM and HT.
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