Purpose: Intravitreal injection of drugs is commonly used for treatment of chorioretinal ocular pathologies, such as age-related macular degeneration. Injection causes a transient increase in the intraocular volume and, consequently, of the intraocular pressure (IOP). The aim of this work is to investigate how intravitreal flow patterns generated during the post-injection eye deflation influence the transport and distribution of the injected drug.
Methods: We present mathematical and computational models of fluid motion and mass transport in the vitreous chamber during the transient phase after injection, including the previously unexplored effects of globe deflation as ocular volume decreases.
Results: During eye globe deflation, significant fluid velocities are generated within the vitreous chamber, which can possibly contribute to drug transport. Pressure variations within the eye globe are small compared to IOP.
Conclusions: Even if significant fluid velocities are generated in the vitreous chamber after drug injection, these are found to have negligible overall effect on drug distribution.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10996986 | PMC |
| http://dx.doi.org/10.1167/iovs.65.4.9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Efficacy of adalimumab in pediatric non-infectious uveitis with and without anterior segment inflammation.
BMC Ophthalmol
January 2025
Shaanxi Eye Hospital, Xi'an People's Hospital (Xi'an Fourth Hospital), Affiliated People's Hospital of Northwest University, Xi'an, 710004, China.
Background: This study aimed to identify the clinical characteristics of cases that is related to the response rate of adalimumab (ADA) treatment.
Methods: A retrospective review of medical records was conducted for pediatric patients with non-infectious uveitis undergoing ADA treatment for a minimum of six months. The patients were stratified into two groups: those with anterior segment inflammation (ASI+) and those without anterior segment inflammation (ASI-).
Experimental Evaluation of Ocular Rigidity and Pressure-Volume Relationship After Ex-Vivo Scleral Cross-Linking With Riboflavin and Ultraviolet A in Porcine Eyes.
Cureus
December 2024
Ophthalmology, Medical School, Institute of Vision and Optics, University of Crete, Heraklion, GRC.
Purpose: Scleral cross-linking (SXL) with ultraviolet A (UVA) and riboflavin has already been used in laboratory studies for scleral stiffness increase as a potential treatment for progressive myopia and scleral ectasia. This study aims to investigate whether the regional application of scleral cross-linking (SXL) with ultraviolet A (UVA) and riboflavin in fresh porcine eye globes affects the ocular rigidity as well as its impact on intraocular pressure after an induced acute increase in the volume of intraocular fluid.
Methods: The study included two groups of fresh porcine eyes: an experimental group (n=20) that underwent scleral cross-linking (SXL) with riboflavin and UVA applied to the posterior sclera and a control group (n=20) that did not receive SXL treatment.
A retrospective study on ruthenium-106 and strontium-90 eye-plaques treatment for retinoblastoma: 16-years clinical experience.
Brachytherapy
January 2025
Ocular Oncology and Radiology Department, S. Fyodorov Eye Microsurgery Federal State Institution, Moscow, Russia.
Purpose: To retrospectively evaluate the efficacy of plaque brachytherapy for the treatment of retinoblastoma.
Methods: We retrospectively reviewed the clinical records of 163 patients (186 eyes, 333 tumors) treated with brachytherapy (Ru or Sr plaques) for intraocular retinoblastoma between November 2007 and August 2023.
Results: Complete tumor control was achieved in 273 tumors (82%).
Diagnostic and Management Challenges in Interferon-γ Release Assay-Positive Patient with Sarcoid Panuveitis from a Non-Endemic Tuberculosis Region.
Ocul Immunol Inflamm
January 2025
Eye Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates.
Purpose: To report a case of biopsy-proven sarcoidosis in a patient with panuveitis and a positive interferon-gamma release assay (IGRA) from a non-endemic tuberculosis (TB) country.
Methods: Case report.
Results: A 26-year-old male from the United Arab Emirates (UAE) presented with granulomatous panuveitis characterized by mutton-fat keratic precipitates, anterior chamber and vitreous cells, and retinal vasculitis.
Clinical spectrum of bilateral microspherophakia and risk factors associated with poor visual outcomes following lensectomy surgery - A multicentric study.
Indian J Ophthalmol
December 2024
The Bodhya Eye Consortium, India.
Purpose: To study the clinical profile of patients with microspherophakia and the factors associated with poor vision following lensectomy surgery.
Methods: A multicenter, retrospective, cross-sectional analysis was conducted from January 2010 to June 2022 on patients diagnosed with microspherophakia.
Results: A total of 102 eyes from 51 patients were enrolled, of whom 24 (47.
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!