AI Article Synopsis
- The study aimed to see if laser flaremetry could measure the concentration of proteins in the aqueous humor of cats and assess disruptions in the blood-aqueous barrier (BAB).
- The researchers used 30 healthy adult cats and compared flaremetry results to protein levels, testing these after administering a medication (pilocarpine) and performing a procedure (paracentesis).
- Results showed a clear correlation between flare values and protein concentrations, with paracentesis causing a more significant disruption to the BAB compared to pilocarpine, indicating flaremetry's potential as a clinical tool for detecting BAB disruptions in cats.
Article Abstract
Objectives: To determine whether aqueous humor flare, measured by use of laser flaremetry, was proportional to aqueous humor protein concentration and to use laser flaremetry to evaluate disruption of the blood-aqueous barrier (BAB) in cats.
Animals: 30 healthy adult cats.
Procedure: Laser flaremetry values for all eyes were compared with aqueous humor protein concentrations determined by use of a Coomassie blue microprotein assay. Laser flaremetry was then performed on both eyes before (0 hours) and 4, 8, and 26 hours after initiation of topical application of 2% pilocarpine (q 8 h) to 1 eye of 9 cats or paracentesis of the anterior chamber of 1 eye of 8 cats. Intraocular pressure and pupil size were also determined. Aqueous humor protein concentration was extrapolated from flare values by use of linear regression.
Results: There was a linear relationship between flare values and aqueous humor protein concentrations. Topical application of 2% pilocarpine and paracentesis of the anterior chamber caused a breakdown of the BAB that was detected by use of laser flaremetry. The highest mean flare readings after application of pilocarpine or paracentesis were 24.4 and 132.8 pc/ms, respectively, which corresponded to aqueous humor protein concentrations of 85.5 and 434.9 mg/dl, respectively.
Conclusions And Clinical Relevance: Paracentesis of the anterior chamber resulted in a more severe breakdown of the BAB in cats than topical application of 2% pilocarpine. Laser flaremetry may be a useful clinical method to detect increases in aqueous flare and, hence, disruptions of the BAB in cats.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.2460/ajvr.2002.63.750 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Increased SCUBE-1 levels in the aqueous humour of patients with pseudoexfoliation syndrome.
Clin Exp Optom
January 2025
Department of Ophthalmology, Dünyagöz Tunus Hospital, Ankara, Türkiye.
Clinical Relevance: Pseudoexfoliation syndrome (PXS) is a common age-related disorder associated with glaucoma and cataract. Despite its clinical importance, the pathogenesis of PXS is not yet fully understood.
Background: To evaluate levels of SCUBE-1 (signal peptide, CUB domain, and epidermal growth factor-like domain containing protein 1) in the serum and aqueous humour of patients with PXS in comparison with non-PXS controls.
Untargeted Metabolomic Study of Patients with Macular Edema Secondary to Retinal Vein Occlusion in Aqueous Humor.
Clin Ophthalmol
January 2025
Department of Ophthalmology, Tong Ren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China.
Purpose: The aim of this study was to identify metabolic biomarkers and investigate the metabolic changes associated with aqueous humor in retinal vein occlusion macular edema (RVO-ME).
Methods: Aqueous humor (AH) samples were collected from patients, including those diagnosed with central retinal vein occlusion macular edema (CRVO-ME), branch retinal vein occlusion macular edema (BRVO-ME), and a control group undergoing cataract surgery. Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was utilized to analyze the metabolomic profiles in aqueous humor.
Treatment of pseudophakic aqueous misdirection syndrome.
Sci Rep
January 2025
Department of Ophthalmology, Inselspital, Bern University Hospital, University of Bern, Freiburgstrasse, 3010, Bern, Switzerland.
To describe the management and clinical course of 12 cases of pseudophakic aqueous misdirection syndrome (AMS). Twelve eyes of 12 Patients diagnosed with pseudophakic AMS between 2021 and 2022 were included. Best-corrected visual acuity, refraction, intraocular pressure (IOP), anti-glaucomatous medication, spectral domain ocular coherence tomography (SD-OCT) and postoperative complications were evaluated.
View Article and Find Full Text PDFComparative analysis of iridian anterior segment OCT and microbiological features in Fuchs Uveitis Syndrome and Posner-Schlossman Syndrome.
Graefes Arch Clin Exp Ophthalmol
January 2025
Hospital Universitario de La Princesa, C/Diego de Leon, 62, 28006, Madrid, Spain.
Purpose: To compare iridian Swept-Source Anterior Segment OCT (SS-AS-OCT) and microbiological features in Aqueous Humor (AH) in patients with Fuchs Uveitis Syndrome (FUS) and Posner-Schlossman Syndrome (PSS).
Methods: Comparative, retrospective-prospective single center study examining 131 eyes from 66 patients, including 33 eyes with PSS, 37 eyes with FUS, and 61 healthy eyes. AH samples were collected from affected eyes in all patients.
Aqueous Proteomic and Metabolomic Profiles in Low-Energy vs High-Energy Femtosecond Laser-Assisted Cataract Surgery.
Invest Ophthalmol Vis Sci
January 2025
Singapore Eye Research Institute, Singapore.
Purpose: To investigate the aqueous proteomics and metabolomics in low-energy and high-energy femtosecond laser-assisted cataract surgery (FLACS).
Methods: In this prospective observational study, 72 patients were randomized to 3 groups: low-energy FLACS, high-energy FLACS, and conventional phacoemulsification (controls). Aqueous was collected after femtosecond laser treatment or at the beginning of surgery (controls).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!