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Effects of Different MAP Targets on Ocular Perfusion and Optic Nerve Microvasculature During Rhinoplasty
Sponsor: Hitit University
Summary
This randomized controlled trial aims to evaluate the effects of two different mean arterial pressure (MAP) targets during controlled hypotension on ocular perfusion and optic nerve head microvasculature in patients undergoing elective rhinoplasty or septorhinoplasty. A total of 60 patients will be randomized in a 1:1 ratio to a target MAP of either 50-60 mmHg or 60-70 mmHg during general anesthesia. Intraocular pressure (IOP) will be measured at predefined perioperative time points, and estimated ocular perfusion pressure (OPP) will be calculated using simultaneous MAP and IOP measurements. Optical coherence tomography angiography (OCTA) will be performed preoperatively and postoperatively to assess changes in peripapillary, optic nerve head, and macular microvascular parameters. The primary objective is to compare changes in peripapillary vessel density between the two MAP target groups. Secondary objectives include evaluating changes in optic nerve head microvasculature, intraoperative OPP and IOP, and the relationships between the depth and duration of hypotension and OCTA-derived microvascular changes.
Official title: Effects of Different Mean Arterial Pressure Targets on Ocular Perfusion and OCTA-Derived Optic Nerve Head Microvasculature During Controlled Hypotension in Rhinoplasty: A Prospective Randomized Controlled Trial
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
60
Start Date
2026-09-20
Completion Date
2026-12-15
Last Updated
2026-10-14
Healthy Volunteers
No
Interventions
Lower MAP Target Strategy (50-60 mmHg)
Controlled hypotension will be maintained with a target mean arterial pressure (MAP) of 50-60 mmHg during general anesthesia. MAP will be continuously monitored, and anesthetic management will be titrated as clinically appropriate to maintain the assigned target range.
Higher MAP Target Strategy (60-70 mmHg)
Controlled hypotension will be maintained with a target mean arterial pressure (MAP) of 60-70 mmHg during general anesthesia. MAP will be continuously monitored, and anesthetic management will be titrated as clinically appropriate to maintain the assigned target range.
Locations (1)
Hitit university
Çorum, Turkey (Türkiye)