Distribution of Ocular Perfusion Pressure in Hypertensive Patients
S. Shruthi *
Department of Pathology, Sree Balaji Medical College and Hospital, Bharath Institute of Higher Education and Research, Chennai, India.
*Author to whom correspondence should be addressed.
Abstract
Aim: To describe the distribution of ocular perfusion pressure hypertensive patients.
Design: Cross-sectional observation study.
Materials and Methods: Hospital-based, case control cross-sectional study conducted on 100 patients. Systolic and diastolic blood pressure (SBP and DBP) was measured with a Mercury Sphygmomanometer. Mean ocular perfusion pressure (MOPP) = ⅔ (mean arterial pressure − IOP), where mean arterial pressure (MAP) = DBP + ⅓ (SBP − DBP), systolic perfusion pressure (SPP) = SBP – IOP and diastolic perfusion pressure (DPP) = DBP − IOP was calculated.
Results: High values of diastolic BP (>90 mmHg) and low values of OPP (<40 mmHg) were associated to an increased risk of confirmed POAG.
Conclusion: There is a close relationship between OPP and confirmed glaucoma in hypertensive patients.
Keywords: Diastolic Perfusion Pressure (DPP), Intraocular Pressure (IOP), Ocular Perfusion Pressure (OPP), Primary Open-Angle Glaucoma (POAG).