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Moussa G, Jalil A, Lippera M, Cristescu IE, Ferrara M, Ally N, Ziaei H, El-Faouri M, Patton N, Jasani KM, Dhawahir-Scala F, Ivanova T. SF 6 COMPARED WITH C 2 F 6 FOR INFERIOR RHEGMATOGENOUS RETINAL REPAIR : The Manchester Pseudophakic Retinal Detachment Study. Retina 2024; 44:791-798. [PMID: 38236936 DOI: 10.1097/iae.0000000000004051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/24/2024]
Abstract
PURPOSE To compare SF 6 relative with C 2 F 6 in the anatomical and functional outcomes following pars plana vitrectomy for uncomplicated primary pseudophakic rhegmatogenous retinal detachment with inferior causative breaks. METHODS This is a retrospective, comparative study on eyes with pseudophakic rhegmatogenous retinal detachment with inferior causative breaks that had small-gauge pars plana vitrectomy repair using SF 6 and C 2 F 6 tamponade between 2011 and 2020 at a tertiary centre in the United Kingdom. Primary outcome was single surgery anatomical success, and the secondary outcome was best-corrected visual acuity. Propensity score matching, using preoperative findings as covariates to account for relevant confounders, was performed. RESULTS From 162 pseudophakic rhegmatogenous retinal detachment eyes with inferior causative breaks, the median (interquartile range) follow-up was 82 (52-182) days. The single surgery anatomical success was 156 (96.3%) overall: 47 of 47 (100.0%) and 109 of 115 (94.8%) in the SF 6 and C 2 F 6 groups, respectively ( P = 0.182). Relative to the SF 6 group, the C 2 F 6 group had a higher mean number of tears (SF 6 : 3.1[2.0], C 2 F 6 : 4.5[2.7], P = 0.002) and greater retinal detachment extent (SF 6 : 5.3[2.9], C 2 F 6 : 6.2[2.6] clock hours, P = 0.025). Following propensity score matching analysis, 80 eyes were matched with 40 in each group to homogenize preoperative factors. No significant difference was found in single surgery anatomical success and best-corrected visual acuity between the groups following propensity score matching. CONCLUSION Primary pars plana vitrectomy with gas tamponade leads to a high single surgery anatomical success rate in uncomplicated pseudophakic rhegmatogenous retinal detachment with inferior causative breaks with no additional benefit associated with long-acting tamponade when comparing C 2 F 6 with SF 6 .
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Affiliation(s)
- George Moussa
- Manchester Royal Eye Hospital, Manchester, United Kingdom
| | - Assad Jalil
- Manchester Royal Eye Hospital, Manchester, United Kingdom
| | - Myrta Lippera
- Manchester Royal Eye Hospital, Manchester, United Kingdom
| | | | - Mariantonia Ferrara
- Manchester Royal Eye Hospital, Manchester, United Kingdom
- School of Medicine, University of Málaga, Málaga, Spain; and
| | - Naseer Ally
- Manchester Royal Eye Hospital, Manchester, United Kingdom
| | - Hadi Ziaei
- Manchester Royal Eye Hospital, Manchester, United Kingdom
| | - Muhannd El-Faouri
- Manchester Royal Eye Hospital, Manchester, United Kingdom
- The Hashemite University, Zarqa, Jordan
| | - Niall Patton
- Manchester Royal Eye Hospital, Manchester, United Kingdom
| | - Kirti M Jasani
- Manchester Royal Eye Hospital, Manchester, United Kingdom
| | | | - Tsveta Ivanova
- Manchester Royal Eye Hospital, Manchester, United Kingdom
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Ferrara M, Steel DH, Romano MR. A minimum specification dataset for liquid ocular endotamponades: recommendations by a European expert panel. Graefes Arch Clin Exp Ophthalmol 2024; 262:1141-1149. [PMID: 38038728 PMCID: PMC10995036 DOI: 10.1007/s00417-023-06289-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/17/2023] [Accepted: 10/19/2023] [Indexed: 12/02/2023] Open
Abstract
PURPOSE To propose a minimum specification dataset to characterize liquid ocular endotamponades (OEs), namely silicone oil (SO), heavy SO (HSO), perfluorodecalin (PFD), and perfluoro-octane (PFO), in terms of physicochemical properties, purity and available evidence of safety, in line with ISO16672:2020. METHODS An evidence-based consensus using the expert panel technique was conducted. Two facilitators led a committee of 11 European experts. Facilitators prepared a dataset for each compound including the list of specifications relevant for the safety, identified by the group members on the basis of expertise and a comprehensive literature review. Each item was ranked by each member using a 9-point scale from 1 "absolutely to not include" to 9 "absolutely to include" in two rounds followed by discussion. Only items reaching consensus (score ≥ 7 from ≥ 75% of members) were included in the final datasets. RESULTS For all OEs, consensus was reached to include manufacturer, density, refractive index, chemical composition, dynamic viscosity, interfacial and surface tension, endotoxins, in vitro cytotoxicity assessment, and any evidence from ex vivo and/or in vivo tests for safety assessment. Additional specifications were added for SO (molecular weight distribution, content of oligosiloxanes with MW ≤ 1000 g/mol, spectral transmittance) and PFD/PFO (% of pure PFD/PFO in the final product, vapor pressure, chemical analyses performed for safety assessment). CONCLUSION The proposed evidence-based minimum specification datasets for SO, HSO, PFD, and PFO have the potential to provide surgeons and health service purchasers with an easily available overview of the most relevant information for the safety assessment of OEs.
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Affiliation(s)
| | - David Hw Steel
- Sunderland Eye Infirmary, Sunderland, UK.
- Bioscience Institute, Newcastle University, Newcastle upon Tyne, UK.
| | - Mario R Romano
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Department of Ophthalmology, Humanitas Gavazzeni-Castelli, Bergamo, Italy
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Ledda PG, Rossi T, Badas MG, Querzoli G. Can wall shear-stress topology predict proliferative vitreoretinopathy localization following pars plana vitrectomy? J Biomech 2024; 162:111914. [PMID: 38157782 DOI: 10.1016/j.jbiomech.2023.111914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 12/08/2023] [Accepted: 12/20/2023] [Indexed: 01/03/2024]
Abstract
We numerically study the fluid dynamics of oil tamponade in models of vitrectomized eyes prompted by a subset of daily activities corresponding to movements on the horizontal plane with the patient in a standing position. Bulk flow features are related to near-wall flow topology and transport at the retinal surface through a wall shear-stress-based analysis. Proliferative VitreoRetinopathy (PVR) is the leading cause of retinal re-detachment occurring in about 20% of all cases due to the accumulation of inflammatory cells in discrete retinal regions. Signalling soluble mediators stimulate inflammatory cells' chemotaxis and studying their distribution across the retinal surface may acquire clinical relevance. In all the investigated cases, persistent and elongated regions along the retina, potentially prone to accumulate chemo-attractants and cells are observed. Gradients of soluble inflammation mediators present in the aqueous are known responsible for the so-called epithelial-mesenchymal transition that initiates PVR and favours recurrent retinal detachment prompting the proliferation of inflammatory cells with collagen matrix deposition and its contraction. The surgical apposition of encircling scleral buckling elements, known for over a century to influence PVR formation and localization, modifies the attracting regions, possibly causing an accumulation of molecules and cells along approximately vertical lines that follow the rising menisci due to the cerclage indentation. The resulting spatial pattern is compatible with clinical observations. This study may open toward rational analyses of near-wall transport to predict PVR pathogenesis by relating biochemical accumulation in certain areas of the retina to clinical conditions.
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Affiliation(s)
- P G Ledda
- DICAAR, Università degli Studi di Cagliari, Cagliari, Italy
| | - T Rossi
- IRCCS Fondazione G.B. Bietti ONLUS, Rome, Italy
| | - M G Badas
- DICAAR, Università degli Studi di Cagliari, Cagliari, Italy
| | - G Querzoli
- DICAAR, Università degli Studi di Cagliari, Cagliari, Italy.
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Romano MR, Ferrara M, Coco-Martin RM, Rickmann A, Spitzer MS, Steel DHW, Pastor JC. INTRAOCULAR EMULSION OF SILICONE OIL (ITEMS) GRADING SYSTEM: An Evidence-Based Expert-Led Consensus. Retina 2023; 43:1370-1376. [PMID: 37071921 DOI: 10.1097/iae.0000000000003811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
PURPOSE To propose the InTraocular EMulsion of Silicone oil (ITEMS) grading system for the assessment of silicone oil (SiO) emulsion, applicable in a routine clinical setting and validated through an expert-led consensus procedure. METHODS Seven experts on intraocular liquid tamponades, led by a facilitator, performed a literature review on the detection of SiO emulsion. Based on the proposed ideas, a questionnaire was developed and submitted to the experts on the methods to detect SiO emulsion and the items to grade. After 2 rounds of individual ranking using a 9-point scale and related discussion, the final grading system was developed including items that reached consensus (score ≥7 from ≥75% of members). RESULTS The agreed ITEMS grading system includes the identification of SiO microbubbles and large SiO bubbles through slit-lamp biomicroscopy, gonioscopy, fundus examination under mydriasis, or ultra-wide-field fundus photography. Moreover, macular and disk optical coherence tomography are used to detect SiO-associated hyperreflective dots. CONCLUSION An evidence-based expert-led consensus was conducted to develop grading system of SiO emulsion, allowing, for the first time, homogenous collection of data on SiO emulsion. This has the potential to improve the understanding of the role and clinical relevance of SiO emulsion, allowing comparisons between different studies.
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Affiliation(s)
- Mario R Romano
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milano, Italy
- Eye Center, Humanitas Gavazzeni-Castelli, Bergamo, Italy
| | | | - Rosa M Coco-Martin
- Retina Group, Instituto Universitario de Oftalmobiología Aplicada (IOBA), Universidad de Valladolid, Campus Miguel Delibes, Paseo de Belén, Valladolid, Spain
- Centro en Red de Medicina Regenerativa y Terapia Celular de Castilla Y León, Valladolid, Spain
- RICORS de Enfermedades Inflamatorias, Carlos III National Institute of Health, Madrid, Spain
| | | | - Martin S Spitzer
- University Medical Center Hamburg-Eppendorf, Departrment of Ophthalmology, University of Hamburg, Hamburg, Germany
| | - David H W Steel
- Sunderland Eye Infirmary, Sunderland, United Kingdom; and
- Bioscience Institute, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - J Carlos Pastor
- Retina Group, Instituto Universitario de Oftalmobiología Aplicada (IOBA), Universidad de Valladolid, Campus Miguel Delibes, Paseo de Belén, Valladolid, Spain
- Centro en Red de Medicina Regenerativa y Terapia Celular de Castilla Y León, Valladolid, Spain
- RICORS de Enfermedades Inflamatorias, Carlos III National Institute of Health, Madrid, Spain
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Shao Y, Liu X, Shu Y, Lv X, Bi Y. Subepithelial white deposition in the cornea associated with silicone oil and surgical management: a case report. Front Med (Lausanne) 2023; 10:1147767. [PMID: 37358996 PMCID: PMC10288839 DOI: 10.3389/fmed.2023.1147767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 05/15/2023] [Indexed: 06/28/2023] Open
Abstract
A 36-year-old patient presented with a complaint of an extensive "white scar" in his right eye without pain after silicone oil presence in the vitreous cavity for 12 years. Slit-lamp microscopy revealed extensive corneal leukoplakia and mild limbus neovascularization. Anterior segment optical coherence tomography revealed marked eccentric thickening of the subepithelium and normal thickness of the stroma. We proceeded with silicone oil removal and intraocular and anterior chamber lavage at first, followed by epithelial lesion excision combined with amniotic membrane transplantation 3 months later. The patient was satisfied with the clear cornea appearance.
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Affiliation(s)
- Yuting Shao
- Department of Ophthalmology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Xin Liu
- Department of Ophthalmology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Department of Ophthalmology, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Yiyang Shu
- Department of Ophthalmology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Xiao Lv
- Department of Ophthalmology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yanlong Bi
- Department of Ophthalmology, Tongji Hospital, School of Medicine, Tongji University, Shanghai, China
- Tongji Eye Institute, Tongji University, Shanghai, China
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Shukla D, Dhawan A, Kalliath J. MEDIUM-TERM PERFLUORO-N-OCTANE AS RESCUE POSTOPERATIVE TAMPONADE FOR VERY COMPLEX RETINAL DETACHMENTS: ANATOMICAL AND FUNCTIONAL OUTCOMES. Retina 2023; 43:905-912. [PMID: 36791344 DOI: 10.1097/iae.0000000000003763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
PURPOSE To report the anatomical and functional outcomes of medium-term perfluoro-n-octane (PFO) tamponade as a rescue procedure in very complex retinal detachments (RDs). METHODS We reviewed the case records of 35 consecutive patients who underwent vitrectomy for very complex RDs due to diverse etiologies. The surgical complexity was so graded because of the intraoperative failure to ascertain complete retinal reattachment; perfluoro-n-octane was used as rescue tamponade for 2 to 4 weeks. The second intervention included additional membrane peeling, retinectomy, endophotocoagulation, and gas/silicone oil tamponade. The minimum follow-up was 3 months after the final intervention: the primary outcome was retinal reattachment and the secondary outcome was change in best-corrected visual acuity (BCVA). RESULTS The most common presentations were severe trauma with retinal incarceration, preretinal and subretinal hemorrhage, or chronic/recurrent RDs with anterior proliferative vitreoretinopathy. Preoperative BCVA was ≤counting fingers in 31 (88.6%) patients. Complete retinal attachment without any tamponade was achieved in 33 (94.3%) eyes. best-corrected visual acuity improved in 30 (85.7%) eyes: 16 (45.7%) had BCVA ≥20/200 and 21 (60%) regained ambulatory vision (≥5/200). Two eyes developed keratopathy, and four needed antiglaucoma medications. CONCLUSION We achieved excellent anatomical outcomes and acceptable functional outcomes in nearly inoperable RDs with few side effects. Medium-term perfluoro-n-octane tamponade can be used as a salvage procedure in very complex RDs where intraoperative reattachment cannot be ensured.
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Affiliation(s)
| | - Anuradha Dhawan
- Calderdale Huddersfield Foundation NHS Trust Hospital, UK; and
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Moussa G, Tadros M, Ch'ng SW, Ferrara M, Kalogeropoulos D, Sharma A, Lett KS, Mitra A, Tyagi AK, Andreatta W. Unexplained visual loss in retinal detachment repair: comparing gas, silicone oil and heavy silicone oil by multivariable regression. Int J Retina Vitreous 2023; 9:30. [PMID: 37120629 PMCID: PMC10148464 DOI: 10.1186/s40942-023-00466-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 04/03/2023] [Indexed: 05/01/2023] Open
Abstract
PURPOSE To measure the proportion of unexplained and all causes of visual loss following primary rhegmatogenous-retinal-detachment (RRD) repair, comparing gas tamponade (SF6, C2F6, C3F8), silicone oil (SO, 1000cs and 5000cs) and heavy silicone oil (Densiron). METHODS Retrospective, continuous, comparative study from 01/1/2017-31/5/2021. All primary RRDs were included after successful removal of SO and Densiron. Primary failures were excluded. Visual loss was defined as reduction of ≥0.30 logMAR units. Multivariable binary-logistic and linear regression models to compare tamponade, and all cases of unexplained visual loss and logMAR gain were performed. Covariates included age, ocular co-morbidities, pre-op vision, macula-status, high-myopia, giant-retinal-tear (GRT), perfluorocarbon-use, combined buckle/PPV, PVR-C, retinectomy, tamponade agent and post-operative lens status. RESULTS Of 1,012 primary RRDs, we found an incidence of unexplained visual loss in 15/1012 (1.5%, SF6:1/341[0.3%], C2F6:4/338[1.2%], C3F8:2/239[0.8%], Densiron:0/33[0.0%], SO-1000cs:5/43[11.6%] and SO-5000cs:3/18[16.7%]), and visual loss of all causes in 57/1012 (5.6%, SF6:13/341[3.8%], C2F6:14/338[4.1%], C3F8:15/239[6.3%], Densiron:2/33[6.1%], SO-1000cs:9/43[20.9%] and SO-5000cs:4/18[22.2%]). On multivariable binary-logistic regression, we report that macula-on RRD (Odds-Ratio[OR]5.7,95% Confidence-interval[CI]1.2-28.2, p=0.032), GRT (OR35.0,CI 2.0-617.3, p=0.015), combined buckle/PPV (OR37.7,CI 2.0-711.4, p=0.015), SO1000cs (OR86.6,CI 5.6-1,348.0), p=0.001) and 5000cs (OR37.2,CI 1.3-1,101.5, p=0.036) (Reference-tamponade:SF6) were associated with unexplained visual loss. Duration of oil tamponade was not linked to increase in unexplained visual loss (p=0.569). CONCLUSIONS Correlation between SO in detachment repairs and unexplained visual loss has been established, however incidence with HSO has not been compared to other agents. This study demonstrates that although SO was linked with risk-adjusted increased unexplained visual loss relative to gas tamponade, no such association was found for Densiron, on multivariable analysis.
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Affiliation(s)
- George Moussa
- Birmingham and Midland Eye Centre and Academic Unit of Ophthalmology, University of Birmingham, Birmingham, UK.
- Manchester Royal Eye Hospital, Oxford Road, Manchester, M13 9WL, UK.
| | - Maria Tadros
- Birmingham and Midland Eye Centre and Academic Unit of Ophthalmology, University of Birmingham, Birmingham, UK
| | - Soon Wai Ch'ng
- Birmingham and Midland Eye Centre and Academic Unit of Ophthalmology, University of Birmingham, Birmingham, UK
| | | | - Dimitrios Kalogeropoulos
- Birmingham Midlands Eye Centre, Sandwell and West Birmingham Hospitals NHS Trust, Dudley Road, Birmingham, B18 7QH, UK
- Department of Ophthalmology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece
| | - Ash Sharma
- Birmingham Midlands Eye Centre, Sandwell and West Birmingham Hospitals NHS Trust, Dudley Road, Birmingham, B18 7QH, UK
| | - Kim Son Lett
- Birmingham Midlands Eye Centre, Sandwell and West Birmingham Hospitals NHS Trust, Dudley Road, Birmingham, B18 7QH, UK
| | - Arijit Mitra
- Birmingham Midlands Eye Centre, Sandwell and West Birmingham Hospitals NHS Trust, Dudley Road, Birmingham, B18 7QH, UK
| | - Ajai K Tyagi
- Birmingham Midlands Eye Centre, Sandwell and West Birmingham Hospitals NHS Trust, Dudley Road, Birmingham, B18 7QH, UK
| | - Walter Andreatta
- Birmingham Midlands Eye Centre, Sandwell and West Birmingham Hospitals NHS Trust, Dudley Road, Birmingham, B18 7QH, UK
- Kantonsspital Winterthur, Brauerstrasse 15, 8400, Winterthur, Switzerland
- University of Zurich, Rämistrasse 71, 8006, Zurich, Switzerland
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Lazzara F, Conti F, Ferrara M, Lippera M, Coppola M, Rossi S, Drago F, Bucolo C, Romano MR. Safety Profile of Lutein- Versus Triamcinolone Acetonide-Based Vitreous Staining. Transl Vis Sci Technol 2023; 12:5. [PMID: 36598459 PMCID: PMC9832719 DOI: 10.1167/tvst.12.1.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Purpose To assess the safety profile of a new lutein-based vitreous dye (LB-VD) formulation compared with various triamcinolone acetonide (TA) formulations with and without subsequent exposure to perfluorodecalin (PFD) in vitro. Methods Human adult retinal pigment epithelial cells (ARPE-19) were treated with the following formulations: undiluted preserved TA (TA-BA), diluted preserved TA (D-TA-BA), preservative-free TA (TA-PF), and LB-VD. First, cell tolerability was evaluated with MTT, LDH, and ATPlite assays after 1, 5, and 30 minutes of exposure to each tested formulation. Then, cells were sequentially exposed to formulations and PFD. After 24 hours of exposure to PFD, cell tolerability was evaluated through MTT and ATPlite assays. Results Among the formulations tested, LB-VD showed the highest levels of cell viability, cell metabolism, and cell proliferation and induced the lowest release of LDH, whereas the TA-based formulations demonstrated a cytotoxic effect on ARPE-19 cells in vitro. After subsequent 24-hour exposure to PFD, a greater reduction of cell viability was noted for all the formulations; however, this reduction was not significant only for the combination LB-VD-PFD, which was the best tolerated condition. Conclusions LB-VD showed a better safety profile compared with all TA-based formulations, even when used in combination with PFD. Translational Relevance In surgical practice, LB-VD may be preferred to TA-based formulations for vitreous staining in the light of its more favorable safety profile.
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Affiliation(s)
- Francesca Lazzara
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - Federica Conti
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - Mariantonia Ferrara
- Manchester Royal Eye Hospital, Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - Myrta Lippera
- Manchester Royal Eye Hospital, Manchester University Hospitals NHS Foundation Trust, Manchester, UK,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | - Michele Coppola
- Department of Ophthalmology, San Gerardo Hospital, Monza, Italy
| | - Settimio Rossi
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, University of Campania Luigi Vanvitelli, Naples, Italy
| | - Filippo Drago
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy,Center for Research in Ocular Pharmacology–CERFO, University of Catania, Catania, Italy
| | - Claudio Bucolo
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy,Center for Research in Ocular Pharmacology–CERFO, University of Catania, Catania, Italy
| | - Mario R. Romano
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy,Eye Center, Humanitas Gavazzeni-Castelli, Bergamo, Italy
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Interfacial Dynamics of Adsorption Layers as Supports for Biomedical Research and Diagnostics. COLLOIDS AND INTERFACES 2022. [DOI: 10.3390/colloids6040081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The input of chemical and physical sciences to life sciences is increasingly important. Surface science as a complex multidisciplinary research area provides many relevant practical tools to support research in medicine. The tensiometry and surface rheology of human biological liquids as diagnostic tools have been very successfully applied. Additionally, for the characterization of pulmonary surfactants, this methodology is essential to deepen the insights into the functionality of the lungs and for the most efficient administration of certain drugs. Problems in ophthalmology can be addressed using surface science methods, such as the stability of the wetting films and the development of artificial tears. The serious problem of obesity is fast-developing in many industrial countries and must be better understood, while therapies for its treatment must also be developed. Finally, the application of fullerenes as a suitable system for detecting cancer in humans is discussed.
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Ferrara M, Zheng Y, Romano V. Editorial: Imaging in Ophthalmology. J Clin Med 2022; 11:jcm11185433. [PMID: 36143079 PMCID: PMC9503085 DOI: 10.3390/jcm11185433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
Over the last decade, ophthalmology has significantly benefited from advances in vivo non-invasive ophthalmic imaging techniques that play currently a fundamental role in the clinical assessment, diagnosis, management, and monitoring of a wide variety of conditions involving both the anterior and posterior segment [...]
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Affiliation(s)
| | - Yalin Zheng
- Department of Eye and Vision Science, University of Liverpool, Liverpool L69 3BX, UK
- St Paul’s Eye Unit, Royal Liverpool University Hospital, Liverpool L69 3BX, UK
| | - Vito Romano
- Eye Clinic, Department of Medical and Surgical Specialties, Radiological Sciences, and Public Health, University of Brescia, 25121 Brescia, Italy
- ASST Civil Hospital of Brescia, 25123 Brescia, Italy
- Correspondence:
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Retinal and Corneal Changes Associated with Intraocular Silicone Oil Tamponade. J Clin Med 2022; 11:jcm11175234. [PMID: 36079165 PMCID: PMC9457190 DOI: 10.3390/jcm11175234] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/13/2022] [Accepted: 09/01/2022] [Indexed: 12/22/2022] Open
Abstract
Silicone oils (SO) are used as long-term intraocular tamponades and have an irreplaceable role in vitreoretinal surgery. They can, however, be associated with multiple and potentially severe complications, involving different ocular tissues, in particular retina and cornea. Recent advances in ophthalmic imaging have allowed the precise characterization of retinal and corneal microstructural changes, at a subclinical level. This detailed analysis of SO-related retinal and corneal changes has improved our understanding of their pathogenesis and offer the potential for optimized monitoring and management of patients with SO-filled eyes. This review aims to provide clinicians and ophthalmic scientists with an updated and comprehensive overview of the corneal and retinal changes associated with SO tamponade.
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Romano MR, Rossi T, Borgia A, Catania F, Sorrentino T, Ferrara M. Management of refractory and recurrent macular holes: A comprehensive review. Surv Ophthalmol 2022; 67:908-931. [DOI: 10.1016/j.survophthal.2022.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 01/22/2022] [Accepted: 01/24/2022] [Indexed: 10/19/2022]
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Gatto C, Romano MR, Giurgola L, Ferrara M, Ragazzi E, D'Amato Tothova J. Ex vivo evaluation of retinal cytotoxicity after the use of multiple medical devices in pars plana vitrectomy in porcine eyes. Exp Eye Res 2021; 213:108837. [PMID: 34774490 DOI: 10.1016/j.exer.2021.108837] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/19/2021] [Accepted: 11/08/2021] [Indexed: 12/01/2022]
Abstract
This study aimed to evaluate viability of retinal cells after the use of multiple intraoperative devices, namely a vitreal dye (triamcinolone acetonide,TA), a ERM/ILM dye (solution of trypan blue 0.15% and brilliant blue 0.025%), and two intraocular tamponades, namely perfluoro-n-octane, (PFO) and silicone oil (SO 1000 cSt), with minimal and maximal removal of their residues, during a simulated pars plana vitrectomy (PPV) in porcine eyes ex-vivo. The in vitro cytotoxicity of each of these compounds was verified on ARPE-19 cells by direct tests according to the ISO 10993-5 (2009). Pars plana vitrectomy was performed on 25 enucleated porcine eyes divided in five groups according to the following conditions: Group A) No surgery control: eye bulbs were kept at room temperature for 40 min; Group B) Sham surgery: PPV with the sole use of BSS for 40 min; Group C) Cytotoxic control: PPV with BSS infusion (20 min) followed by intravitreal injection of 1H-PFO (contact time: 20 min); Group D) Surgery with residues: PPV with BSS infusion and sequential intravitreal injection of TA, ERM/ILM dye, PFO and SO, with minimal removal of each compound after a specified contact-time (overall duration: 40 min); Group E) Surgery with minimal residues: PPV performed as in group D, but with maximal removal of each compound (overall duration: 40 min). All the experimental procedures were performed at room temperature. Immediately after surgery, the retina was extracted from each eye bulb and samples of 3-mm diameter were prepared. Retinal viability was determined for each sample by 3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide assay. A cell viability <70% was considered the cytotoxicity threshold. Kruskal-Wallis test was used to evaluate the differences in retinal viability between groups. No cytotoxicity was detected in retinal samples in groups A, B and E. Samples from eye bulbs that had undergone surgery with minimal removal of residues (group D) and cytotoxic controls (group C) showed high retinal cytotoxicity. The tested conditions indicated that the combined use of TA, ERM/ILM dye, PFO and SO during PPV does not affect retinal cells viability if all the devices are properly removed, whereas the cytotoxicity detected in group D may suggest that the presence and accumulation of the residues of the compounds used intraoperatively could negatively impact retinal viability due to a cumulative and/or synergistic cytotoxic effect between them, supporting the crucial role of an optimal removal of the intraoperative medical devices to ensure a safe vitrectomy to the patient.
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Affiliation(s)
- Claudio Gatto
- Research and Development AL.CHI.MI.A. S.r.l, Viale Austria 14, 35020, Ponte San Nicolò, PD, Italy.
| | - Mario R Romano
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20090, Pieve Emanuele, Milano, Italy; Eye Center, Humanitas Gavazzeni-Castelli, Via Gavazzeni 21, 24125, Bergamo, Italy.
| | - Laura Giurgola
- Research and Development AL.CHI.MI.A. S.r.l, Viale Austria 14, 35020, Ponte San Nicolò, PD, Italy.
| | - Mariantonia Ferrara
- Newcastle Eye Centre, Royal Victoria Infirmary, Queen Victoria Rd, Newcastle upon Tyne, NE1 4LP, United Kingdom.
| | - Eugenio Ragazzi
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Largo Meneghetti 2, 35131, Padova, Italy.
| | - Jana D'Amato Tothova
- Research and Development AL.CHI.MI.A. S.r.l, Viale Austria 14, 35020, Ponte San Nicolò, PD, Italy.
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