The effect of pars plan vitrectomy on oxygen saturation in retinal vessels--a pilot study
Autor: | Zuzana Prachařová, Irena Šínová, Kateřina Langová, Jiří Řehák, Chrapek O, Marta Karhanová, Martin Sin |
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Rok vydání: | 2013 |
Předmět: |
Pars plana
Male medicine.medical_specialty genetic structures medicine.medical_treatment chemistry.chemical_element Vitrectomy Blood Pressure Pilot Projects Oxygen chemistry.chemical_compound Ophthalmology medicine Humans Oximetry Prospective Studies Macular hole Oxygen saturation Intraocular Pressure Aged Aged 80 and over Retina business.industry Retinal Vessels Retinal Epiretinal Membrane General Medicine Middle Aged medicine.disease Retinal Perforations Surgery medicine.anatomical_structure chemistry Female Epiretinal membrane business |
Zdroj: | Acta ophthalmologica. 92(4) |
ISSN: | 1755-3768 |
Popis: | Purpose: To determine the effect of pars plana vitrectomy (PPV) on oxygen saturation in retinal vessels. Methods: We performed a prospective consecutive interventional case series of 20 eyes of 20 patients with macular hole or epiretinal membrane. We performed automatic retinal oximetry (Oxymap Inc., Reykjavik, Iceland) in each patient 24 hr prior to and 45 days (range 42–49) after PPV (classic 20G or sutureless 23G). We analysed oxygen saturations in retinal arteries and veins. Vessel segments of first or second degree were selected. The same segment was analysed before and after PPV. Oximetry data were compared by paired two-tailed t-test. Results: Pars plana vitrectomy did not alter arterial haemoglobin saturation with oxygen (98 ± 2% prior to the surgery and 98 ± 3% after the procedure, p = 0.549). The mean venous haemoglobin saturation with oxygen increased after vitrectomy from 63 ± 10% to 66 ± 8% (p = 0.012). Conclusions: Oxygen saturation is higher in retinal veins after pars plana vitrectomy. Further studies are needed to unveil the mechanism of how vitrectomy affects oxygen metabolism in the retina. |
Databáze: | OpenAIRE |
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