Related Experiment Videos
Molecular sieving in suprachoroidal fluid formation in man
Investigative Ophthalmology & Visual Science
|May 1, 1978
Summary
Suprachoroidal fluid analysis reveals molecular sieving across an isoporous membrane in non-hemorrhagic choroidal detachments. Hemorrhagic detachments show disrupted capillary integrity, allowing larger molecules and cells to enter.
Area of Science:
- Ophthalmology
- Fluid Dynamics
- Biochemistry
Background:
- Choroidal detachments (CD) can occur after ocular surgeries.
- Understanding the composition of suprachoroidal fluid (SCF) is crucial for diagnosing and managing CDs.
Purpose of the Study:
- To analyze the chemical and cellular components of SCF in different types of choroidal detachments.
- To investigate the mechanism of fluid formation and its relation to capillary integrity.
Main Methods:
- Analysis of SCF from four subgroups: post-cataract surgery CD, non-hemorrhagic post-glaucoma surgery CD, hemorrhagic post-glaucoma surgery CD, and intraoperative CD.
- Chemical and protein component analysis using serum as a reference.
- Evaluation of cellular elements in hemorrhagic SCF.
Main Results:
- Non-hemorrhagic SCF (groups 1, 2, 4) showed low-molecular-weight substances similar to serum, with reduced high-molecular-weight proteins, suggesting molecular sieving through a 144 Å pore membrane.
- Intraoperative effusions indicated increased molecular sieving with higher filtration rates.
- Hemorrhagic SCF revealed disrupted capillary integrity, allowing passage of larger proteins and cells.
Conclusions:
- The protein distribution in non-hemorrhagic SCF supports an isoporous membrane model with specific pore size.
- Increased filtration rates enhance molecular sieving in choroidal effusions.
- Hemorrhagic choroidal detachments result from significant disruption of the vascular-suprachoroidal barrier.