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Spelta S, Micera A, Gaudenzi D, Niutta M, Surico PL, De Vincentis A, Coassin M, Di Zazzo A. A Functional and Immunologic Point of View on Corneal Endothelial Transplantation: A Systematic Review and Meta-Analysis. J Clin Med 2024; 13:3431. [PMID: 38929958 PMCID: PMC11204674 DOI: 10.3390/jcm13123431] [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: 02/27/2024] [Revised: 06/04/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024] Open
Abstract
Background: To systematically review and meta-analyze the immunologic aspects and outcomes of various endothelial keratoplasty (EK) techniques, specifically comparing Descemet's Stripping Automated Endothelial Keratoplasty (DSAEK), Ultra-Thin Descemet's Stripping Automated Endothelial Keratoplasty (UT-DSAEK), and Descemet's Membrane Endothelial Keratoplasty (DMEK). Methods: Systematic review and meta-analysis. Main outcomes were the proportion of patients achieving a best spectacle-corrected visual acuity (BSCVA) of 20/20 at 6 months after keratoplasty, rejection rate one year after surgery, BSCVA at last follow up, and postoperative immunomodulating regimen. Results: A higher proportion of DMEK patients achieved a BSCVA of 20/20 after 6 months. UT-DSAEK and DMEK showed similar rejection rates with a lower risk of re-bubbling for UT-DSAEK (4% vs. 20%). Conclusions: DMEK showed faster visual recovery than UT-DSAEK but a similar rejection rate and long-term visual acuity. One-year postoperative slow tapering steroid regimen has a positive but not (yet) significant effect on rejection risk and visual outcomes.
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Affiliation(s)
- Sara Spelta
- Department of Ophthalmology, University Campus Bio-Medico, 00128 Rome, Italy; (S.S.); (D.G.); (M.N.); (P.L.S.); (M.C.)
- Fondazione Policlinico Campus Bio-Medico, 00128 Rome, Italy
| | - Alessandra Micera
- Research and Development Laboratory for Biochemical, Molecular and Cellular Applications in Ophthalmological Sciences, IRCCS–Fondazione Bietti, 00184 Rome, Italy;
| | - Daniele Gaudenzi
- Department of Ophthalmology, University Campus Bio-Medico, 00128 Rome, Italy; (S.S.); (D.G.); (M.N.); (P.L.S.); (M.C.)
- Fondazione Policlinico Campus Bio-Medico, 00128 Rome, Italy
| | - Matteo Niutta
- Department of Ophthalmology, University Campus Bio-Medico, 00128 Rome, Italy; (S.S.); (D.G.); (M.N.); (P.L.S.); (M.C.)
- Fondazione Policlinico Campus Bio-Medico, 00128 Rome, Italy
| | - Pier Luigi Surico
- Department of Ophthalmology, University Campus Bio-Medico, 00128 Rome, Italy; (S.S.); (D.G.); (M.N.); (P.L.S.); (M.C.)
- Fondazione Policlinico Campus Bio-Medico, 00128 Rome, Italy
| | - Antonio De Vincentis
- Fondazione Policlinico Campus Bio-Medico, 00128 Rome, Italy
- Internal Medicine, University Campus Bio-Medico, 00128 Rome, Italy
| | - Marco Coassin
- Department of Ophthalmology, University Campus Bio-Medico, 00128 Rome, Italy; (S.S.); (D.G.); (M.N.); (P.L.S.); (M.C.)
- Fondazione Policlinico Campus Bio-Medico, 00128 Rome, Italy
| | - Antonio Di Zazzo
- Department of Ophthalmology, University Campus Bio-Medico, 00128 Rome, Italy; (S.S.); (D.G.); (M.N.); (P.L.S.); (M.C.)
- Fondazione Policlinico Campus Bio-Medico, 00128 Rome, Italy
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Sela TC, Iflah M, Muhsen K, Zahavi A. Descemet membrane endothelial keratoplasty compared with ultrathin Descemet stripping automated endothelial keratoplasty: a meta-analysis. BMJ Open Ophthalmol 2023; 8:e001397. [PMID: 37914389 PMCID: PMC10626808 DOI: 10.1136/bmjophth-2023-001397] [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: 07/14/2023] [Accepted: 10/13/2023] [Indexed: 11/03/2023] Open
Abstract
AIMS This study aims to compare the clinical outcome of Descemet membrane endothelial keratoplasty (DMEK) and ultrathin Descemet stripping automated endothelial keratoplasty (UT-DSAEK) in patients with corneal endothelial dysfunction due to Fuchs' endothelial dystrophy or pseudophakic bullous keratopathy. METHODS We conducted a meta-analysis using a literature search of Embase, PubMed, Cochrane CENTRAL, ClinicalTrials.gov and WHO ICTRP databases. We included randomised controlled trials (RCTs) and cohort studies that compared DMEK and UT-DSAEK (graft<130 µm), with a follow-up of ≥12 months, published until 20 February 2022. We used the Revised Cochrane risk-of-bias tool for RCTs and the Risk of Bias in Non-Randomised Studies-of Interventions system for cohort studies. RESULTS Out of 144 records, 8 studies (3 RCTs, 2 fellow-eye studies and 3 cohort studies) were included, encompassing 376 eyes, (N=187 DMEK vs N=189 UT-DSAEK). The 12-month logarithm of the minimum angle of resolution best-corrected visual acuity (BCVA) was better post-DMEK (mean difference -0.06 (95% CI -0.10 to -0.02)), but with higher rebubbling risk: OR 2.76 (95% CI 1.46 to 5.22). Heterogeneity was significant I2=57%. Findings were consistent when excluding retrospective studies, including only studies with low risk of bias or RCTs only. An analysis of studies with mean DSAEK grafts <70 µm showed no significant difference in BCVA between the procedures. Publication bias was found in the BCVA analysis (Egger's test p=0.023). CONCLUSIONS Post-DMEK BCVA is superior to post-UT-DSAEK when using <130 µm grafts. DSAEK grafts <70 µm may not significantly differ from DMEK. The higher risk of rebubbling with DMEK necessitates an appropriate selection of patients. PROSPERO REGISTRATION NUMBER CRD42022340805.
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Affiliation(s)
- Tal Corina Sela
- School of Public Health, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Moti Iflah
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Khitam Muhsen
- Department of Epidemiology and Preventive Medicine, School of Public Health, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Alon Zahavi
- Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Ophthalmology Department and Laboratory of Eye Research, Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel
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Hurley DJ, Murtagh P, Guerin M. Ultrathin Descemet Stripping Automated Endothelial Keratoplasty (UT-DSAEK) versus Descemet Membrane Endothelial Keratoplasty (DMEK)-a systematic review and meta-analysis. Eye (Lond) 2023; 37:3026-3032. [PMID: 36934158 PMCID: PMC10516931 DOI: 10.1038/s41433-023-02467-2] [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: 09/24/2022] [Revised: 01/29/2023] [Accepted: 02/24/2023] [Indexed: 03/20/2023] Open
Abstract
BACKGROUND/OBJECTIVES Endothelial keratoplasty (EK) is a commonly performed transplant procedure used in the treatment of corneal endothelial dysfunction. The aim of this systematic review and meta-analysis is to evaluate the differences in visual acuity outcomes, endothelial cell density (ECD) and complications between two forms of EK, ultrathin Descemet stripping automated endothelial keratoplasty (UT-DSAEK) and Descemet membrane endothelial keratoplasty (DMEK). METHODS A literature search of MEDLINE, Embase and Cochrane Library was conducted to identify studies reporting comparative results of UT-DSAEK versus DMEK. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement was used for search strategy. Of 141 titles, 7 studies met the inclusion criteria; best corrected visual acuity (BCVA) (LogMAR), ECD (cells/mm2), and complications were compared, with all statistical analysis performed using Review Manager. RESULTS A total of 362 eyes were included for analysis. DMEK resulted in significantly better BCVA at 3 months (0.14 vs 0.22, p = 0.003), 6 months (0.08 vs 0.18, p = 0.005) and 1 year post-op (0.07 vs 0.14, p = 0.0005). UT-DSAEK resulted in significantly lower total complications (25.2% vs 57.3%, p = 0.0001) and rates of re-bubbling (11.0% vs 33.7%, p = 0.004). No differences were found in ECD between the two procedures (1541 vs 1605, p = 0.77). CONCLUSIONS DMEK results in superior visual acuity rates with quicker recovery. However, UT-DSAEK has a more favourable complication profile, particularly regarding lower rates of re-bubbling. Both are valuable options in the treatment of corneal endothelial disease and choice of procedure may depend on surgical expertise.
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Affiliation(s)
- Daire J Hurley
- Department of Ophthalmology, Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland.
| | - Patrick Murtagh
- Department of Ophthalmology, Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland
| | - Marc Guerin
- Department of Ophthalmology, Mater Misericordiae University Hospital, Eccles Street, Dublin 7, Ireland
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de Bruyn B, Ní Dhubhghaill S, Claerhout I, Claes K, Deconinck A, Delbeke H, Huizing M, Krolo I, Muijzer M, Oellerich S, Roels D, Termote K, Van den Bogerd B, Van Gerwen V, Verhaegen I, Wisse R, Wouters K, Consortium TBC, Duchesne B, Koppen C. Belgian Endothelial Surgical Transplant of the Cornea (BEST cornea) protocol: clinical and patient-reported outcomes of Ultra-Thin Descemet Stripping Automated Endothelial Keratoplasty (UT-DSAEK) versus Descemet Membrane Endothelial Keratoplasty (DMEK) - a multicentric, randomised, parallel group pragmatic trial in corneal endothelial decompensation. BMJ Open 2023; 13:e072333. [PMID: 37714670 PMCID: PMC10510864 DOI: 10.1136/bmjopen-2023-072333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 08/31/2023] [Indexed: 09/17/2023] Open
Abstract
OBJECTIVES Corneal blindness is the third most frequent cause of blindness globally. Damage to the corneal endothelium is a leading indication for corneal transplantation, which is typically performed by lamellar endothelial keratoplasty. There are two conventional surgical techniques: Ultra-Thin Descemet Stripping Automated Endothelial Keratoplasty (UT-DSAEK) and Descemet Membrane Endothelial Keratoplasty (DMEK). The purpose of this study is to compare both techniques. METHODS AND ANALYSIS The trial compares UT-DSAEK and DMEK in terms of clinical and patient reported outcomes using a pragmatic, parallel, multicentric, randomised controlled trial with 1:1 allocation with a sample size of 220 participants across 11 surgical centres. The primary outcome is the change in best-corrected visual acuity at 12 months. Secondary outcomes include corrected and uncorrected vision, refraction, proportion of high vision, quality of life (EQ-5D-5L and VFQ25), endothelial cell counts and corneal thickness at 3, 6 and 12 months follow-up appointments. Adverse events will also be compared 12 months postoperatively. ETHICS AND DISSEMINATION The protocol was reviewed by ethical committees of 11 participating centres with the sponsor centre issuing the final definitive approval. The results will be disseminated at clinical conferences, by patient partner groups and open access in peer-reviewed journals. GOVERNANCE OF THE TRIAL Both, trial management group and trial steering committee, are installed with representatives of all stakeholders involved including surgeons, corneal bankers, patients and external experts. TRIAL REGISTRATION NUMBER NCT05436665.
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Affiliation(s)
- Barbara de Bruyn
- Ophthalmology, University Hospital Antwerp, Edegem, Belgium
- Faculty of Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Sorcha Ní Dhubhghaill
- Ophthalmology, University Hospital Antwerp, Edegem, Belgium
- Ophtalmology, UZ Brussel, Brussel, Belgium
| | - Ilse Claerhout
- Ophtalmology, AZ Maria Middelares, Sint-Niklaas, Belgium
- Faculty of Health Sciences, Ghent University, Gent, Belgium
| | - Kim Claes
- Ophthalmology, University Hospital Antwerp, Edegem, Belgium
| | - Ann Deconinck
- Clinical Research Centre, University Hospital Antwerp, Edegem, Belgium
| | - Heleen Delbeke
- Ophthalmology, KU Leuven University Hospitals, Leuven, Belgium
- Health Sciences, KU Leuven Biomedical Sciences Group, Leuven, Belgium
| | - Manon Huizing
- Cell and Tissue Bank, University Hospital Antwerp, Edegem, Belgium
- Faculty of Health Sciences, University Hospital Antwerp, Edegem, Belgium
| | - Iva Krolo
- Ophtalmology, UZ Brussel, Brussel, Belgium
| | - Marc Muijzer
- Ophtalmology, University Medical Centre, Utrecht, The Netherlands
| | - Silke Oellerich
- Ophthalmology, Institute for Innovative Ocular Surgery, Rotterdam, The Netherlands
| | - Dimitri Roels
- Faculty of Health Sciences, Ghent University, Gent, Belgium
- Ophthalmology, University Hospital Ghent, Gent, Belgium
| | - Karolien Termote
- Ophtalmology, UZ Brussel, Brussel, Belgium
- Ophthalmology, Imelda Hospital, Bonheiden, Belgium
| | | | - Veerle Van Gerwen
- Clinical Research Centre, University Hospital Antwerp, Edegem, Belgium
| | - Iris Verhaegen
- Clinical Trial Centre, Antwerp University Hospital, Edegem, Belgium
| | - Robert Wisse
- Ophtalmology, University Medical Centre, Utrecht, The Netherlands
| | - Kristien Wouters
- Clinical Research Centre, University Hospital Antwerp, Edegem, Belgium
| | | | - Bernard Duchesne
- Ophtalmology, Central University Hospital, Liege, Belgium
- Faculty of Health Sciences, University of Liege, Liege, Belgium
| | - Carina Koppen
- Ophthalmology, University Hospital Antwerp, Edegem, Belgium
- Faculty of Health Sciences, University of Antwerp, Antwerp, Belgium
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Leon P, Francescutti L, Gentile P, Birattari F, Ponzin D, Camposampiero D, Franch A, Parekh M. Hemi-Ultrathin Descemet Stripping Automated Endothelial Keratoplasty (Hemi-UT-DSAEK) Using Pediatric Donor Corneas: A Case Series. J Clin Med 2023; 12:5442. [PMID: 37685508 PMCID: PMC10487646 DOI: 10.3390/jcm12175442] [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: 06/15/2023] [Revised: 08/10/2023] [Accepted: 08/14/2023] [Indexed: 09/10/2023] Open
Abstract
OBJECTIVE We sought to evaluate the clinical outcomes of hemi-UT-DSAEK grafts from the pediatric donor corneas of patients affected by Fuchs Endothelial Corneal Dystrophy (FECD). METHODS A prospective, interventional case series was conducted at the Ophthalmology Department of Venice Civil Hospital and the Veneto Eye Bank Foundation (Venice, Italy). Six eyes of six patients affected by FECD received large-diameter, semicircular hemi-UT-DSAEK grafts obtained from three pediatric donor corneas using the standard pull-through method. Endothelial cell density (ECD), central corneal thickness (CCT), best-corrected visual acuity (BCVA) and intraoperative and postoperative complications were recorded at different time intervals up to 12 months. RESULTS The average donor age was 64.6 ± 8.6 years, and the pre-operative ECD was 3266 ± 225 cells/mm2. At 12 months postoperatively, the average ECD was 1376 ± 509 cells/mm2 with a mean decrease of 56.8 ± 19.1% from the preoperative donor count. At 12 months, four out of six eyes had significantly improved and reached a BCVA of ≥20/25 (Snellen equivalent). The mean CCT significantly decreased from 788 ± 138 μm before surgery to 576 ± 30 μm at 12 months postoperatively (p < 0.01). CONCLUSIONS Hemi-UT-DSAEK grafts using pediatric donor corneas are surgically feasible and can provide similar clinical outcomes compared to conventional UT-DSAEK. Transplanting pediatric donor tissues with high ECD into two patients could potentially increase the donor tissue pool to treat endothelial disease.
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Affiliation(s)
- Pia Leon
- Department of Ophthalmology, SS Giovanni e Paolo Hospital, 30122 Venice, Italy
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Zelarino, 30174 Venice, Italy (D.P.)
| | - Lorena Francescutti
- Department of Ophthalmology, SS Giovanni e Paolo Hospital, 30122 Venice, Italy
| | - Pietro Gentile
- Department of Ophthalmology, SS Giovanni e Paolo Hospital, 30122 Venice, Italy
| | - Federica Birattari
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Zelarino, 30174 Venice, Italy (D.P.)
| | - Diego Ponzin
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Zelarino, 30174 Venice, Italy (D.P.)
| | - Davide Camposampiero
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Zelarino, 30174 Venice, Italy (D.P.)
| | - Antonella Franch
- Department of Ophthalmology, SS Giovanni e Paolo Hospital, 30122 Venice, Italy
- International Center for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Zelarino, 30174 Venice, Italy (D.P.)
| | - Mohit Parekh
- Schepens Eye Research Institute, Mass Eye and Ear, Boston, MA 02114, USA
- Department of Ophthalmology, Harvard Medical School, Boston, MA 02115, USA
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Moramarco A, di Geronimo N, Airaldi M, Gardini L, Semeraro F, Iannetta D, Romano V, Fontana L. Intraoperative OCT for Lamellar Corneal Surgery: A User Guide. J Clin Med 2023; 12:jcm12093048. [PMID: 37176489 PMCID: PMC10179477 DOI: 10.3390/jcm12093048] [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: 01/21/2023] [Revised: 04/07/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023] Open
Abstract
Intraoperative OCT is an innovative and promising technology which allows anterior and posterior segment ocular surgeons to obtain a near-histologic cross-sectional and tomographic image of the tissues. Intraoperative OCT has several applications in ocular surgery which are particularly interesting in the context of corneal transplantation. Indeed, iOCT images provide a direct and meticulous visualization of the anatomy, which could guide surgical decisions. In particular, during both big-bubble and manual DALK, the visualization of the relationship between the corneal layers and instruments allows the surgeon to obtain a more desirable depth of the trephination, thus achieving more type 1 bubbles, better regularity of the plane, and a reduced risk of DM perforation. During EK procedures, iOCT supplies information about proper descemetorhexis, graft orientation, and interface quality in order to optimize the postoperative adhesion and reduce the need for re-bubbling. Finally, mushroom PK, a challenging technique for many surgeons, can be aided through the use of iOCT since it guides the correct apposition of the lamellae and their centration. The technology of iOCT is still evolving: a larger field of view could allow for the visualization of all surgical fields, and automated tracking and iOCT autofocusing guarantee the continued centration of the image.
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Affiliation(s)
- Antonio Moramarco
- Ophthalmology Unit, Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, 40126 Bologna, Italy
- Ophthalmology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40126 Bologna, Italy
| | - Natalie di Geronimo
- Ophthalmology Unit, Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, 40126 Bologna, Italy
- Ophthalmology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40126 Bologna, Italy
| | - Matteo Airaldi
- Eye Unit, ASST Spedali Civili di Brescia, Piazzale Spedali Civili, 1, 25123 Brescia, Italy
- Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Viale Europa 15, 25123 Brescia, Italy
| | - Lorenzo Gardini
- Ophthalmology Unit, Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, 40126 Bologna, Italy
- Ophthalmology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40126 Bologna, Italy
| | - Francesco Semeraro
- Eye Unit, ASST Spedali Civili di Brescia, Piazzale Spedali Civili, 1, 25123 Brescia, Italy
- Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Viale Europa 15, 25123 Brescia, Italy
| | - Danilo Iannetta
- Ophthalmology Unit, Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, 40126 Bologna, Italy
- Ophthalmology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40126 Bologna, Italy
| | - Vito Romano
- Eye Unit, ASST Spedali Civili di Brescia, Piazzale Spedali Civili, 1, 25123 Brescia, Italy
- Eye Unit, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Viale Europa 15, 25123 Brescia, Italy
| | - Luigi Fontana
- Ophthalmology Unit, Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum-University of Bologna, 40126 Bologna, Italy
- Ophthalmology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40126 Bologna, Italy
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Fenech MT, Coco G, Pagano L, Gadhvi KA, Titley M, Levis HJ, Parekh M, Kaye SB, Romano V. Thinning rate over 24 months in ultrathin DSAEK. Eye (Lond) 2023; 37:655-659. [PMID: 35292772 PMCID: PMC9998379 DOI: 10.1038/s41433-022-02011-8] [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: 04/11/2021] [Revised: 02/14/2022] [Accepted: 02/24/2022] [Indexed: 11/08/2022] Open
Abstract
AIM To describe the changes in corneal graft thickness following ultrathin Descemet's Stripping Automated Endothelial Keratoplasty (UT-DSAEK) comparing pre- and postoperative values over a 24-month period. METHODS In this retrospective single-center case series, patients who received eye bank-prepared tissues for UT-DSAEK surgery were included. Preoperative and postoperative graft thickness measurements were determined in the eye bank and in clinic using anterior segment optical coherence tomography (AS-OCT) images. Graft thickness measurements and their percentage change between preoperative values and values at 1 day, 1 week and 1, 6, 12, 24 months were calculated. RESULTS In total, 47 eyes of 47 patients with a mean age of 69 ± 11 years (29 males) were included. Twnty-three patients had Fuchs' endothelial dystrophy (49%) and the remaining 24 had pseudophakic bullous keratopathy (51%). In total, 29/47 eyes underwent UT-DSAEK alone (62%) and 18/47 received combined cataract surgery as a triple procedure (38%). Preoperative donor graft thickness was 92 ± 28 μm. Compared to preoperative values, where graft thickness increased to 194 ± 101.3 μm at 1 day, 151.1 ± 71.4 μm at 1 week, and 108.4 ± 52.5 μm at 1 month. Graft thickness continued to gradually decrease over time until 6 months (91.7 ± 33.6 μm), and then plateaued at 12 months (83.9 ± 25.0 μm), showing minimal changes at 2 years (101.4 ± 37.5 μm). CONCLUSION Preoperative DSAEK graft thickness measurements as reported by the eye bank are a valid approximation of DSAEK graft thickness at 6 months after surgery and these measurements tend to stabilize over time up to 2 years after surgery.
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Affiliation(s)
- Matthew T Fenech
- Department of Ophthalmology, The Royal Liverpool University Hospital, Liverpool, UK
| | - Giulia Coco
- Department of Ophthalmology, The Royal Liverpool University Hospital, Liverpool, UK
- Department of Clinical Science and Translational Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Luca Pagano
- Department of Ophthalmology, The Royal Liverpool University Hospital, Liverpool, UK.
- Humanitas Clinical and Research Center, via Manzoni 56, 20089, Rozzano, MI, Italy.
| | - Kunal A Gadhvi
- Department of Ophthalmology, The Royal Liverpool University Hospital, Liverpool, UK
| | - Mitchell Titley
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
| | - Hannah J Levis
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
| | - Mohit Parekh
- Institute of Ophthalmology, University College London, London, UK
| | - Stephen B Kaye
- Department of Ophthalmology, The Royal Liverpool University Hospital, Liverpool, UK
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
| | - Vito Romano
- Department of Ophthalmology, The Royal Liverpool University Hospital, Liverpool, UK
- Department of Eye and Vision Science, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, UK
- Instituto Universitario, Universidad de Oviedo and Fundacion de Investigacion Oftalmologica, Oviedo, Spain
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Bodénès F, Eude Y, Baud'huin M, Vabres B, Weber M, Le Meur G, Orignac I. [Risk factors for failure of pre-cut eye bank UT-DSAEK grafts]. J Fr Ophtalmol 2023; 46:311-321. [PMID: 36804114 DOI: 10.1016/j.jfo.2022.08.012] [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: 12/28/2021] [Revised: 07/26/2022] [Accepted: 08/15/2022] [Indexed: 02/17/2023]
Abstract
INTRODUCTION The main risk factors for graft failure in penetrating keratoplasty are well known. However, few studies have examined donor characteristics or more precise data on endothelial keratoplasty. MATERIALS AND METHODS This was a retrospective, single-center study at the Nantes University Hospital, aiming to identify factors predictive of one-year success or failure of eye bank UT-DSAEK endothelial keratoplasty grafts prepared between May 2016 and October 2018. The outcome measure was success or failure at 12months post keratoplasty. RESULTS One hundred and five grafts were included: 93 successes and 12 failures at 12months. The failure rate was higher in 2016 compared to 2017 and 2018. The characteristics associated with higher failure rate were elderly donor, shorter time between harvesting and grafting, lower endothelial cell density, significant pre-graft endothelial cell loss, re-graft for Fuchs dystrophy, history of corneal transplant. DISCUSSION Our results are consistent with those in the literature. However, some factors, such as the type of corneal harvesting or pre-graft endothelial cell loss, were not found. UT-DSAEK has demonstrated better results than DSAEK, but still appears to be somewhat inferior to DMEK. CONCLUSION The main factor for graft failure in our study was an early re-graft within 12months. However, the low incidence of graft failure limits interpretation of these results.
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Affiliation(s)
- F Bodénès
- Clinique ophtalmologique, CHU de Nantes, 1, place Alexis - Ricordeau, 44000 Nantes, France.
| | - Y Eude
- Clinique ophtalmologique, CHU de Nantes, 1, place Alexis - Ricordeau, 44000 Nantes, France
| | - M Baud'huin
- Banque multi-tissus, CHU de Nantes, 9, quai Moncousu, 44000 Nantes, France
| | - B Vabres
- Clinique ophtalmologique, CHU de Nantes, 1, place Alexis - Ricordeau, 44000 Nantes, France
| | - M Weber
- Clinique ophtalmologique, CHU de Nantes, 1, place Alexis - Ricordeau, 44000 Nantes, France
| | - G Le Meur
- Clinique ophtalmologique, CHU de Nantes, 1, place Alexis - Ricordeau, 44000 Nantes, France
| | - I Orignac
- Clinique ophtalmologique, CHU de Nantes, 1, place Alexis - Ricordeau, 44000 Nantes, France
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Maier AKB, Milek J, Joussen AM, Dietrich-Ntoukas T, Lichtner G. Systematic Review and Meta-analysis: Outcomes After Descemet Membrane Endothelial Keratoplasty Versus Ultrathin Descemet Stripping Automated Endothelial Keratoplasty. Am J Ophthalmol 2023; 245:222-232. [PMID: 36220351 DOI: 10.1016/j.ajo.2022.09.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/25/2022] [Accepted: 09/29/2022] [Indexed: 11/18/2022]
Abstract
PURPOSE To compare the efficacy and safety of ultrathin Descemet stripping (automated) endothelial keratoplasty (UT-DS(A)EK) versus Descemet membrane endothelial keratoplasty (DMEK) for the treatment of Fuchs endothelial dystrophy (FED) and bullous keratopathy (BK). DESIGN Systematic review and meta-analysis. METHODS Literature containing DMEK and UT-DSAEK were searched in the Cochrane Database of Systematic Reviews, PubMed, EMBASE, LILACS, and through manual reference searching. Studies were included that measured the outcome of interventions-including best corrected visual acuity (BCVA), endothelial cell density (ECD), and postoperative complications, especially graft detachment with the need of re-bubbling, graft rejection, graft failure, and postoperative elevated intraocular pressure (IOP)-in patients with FED and BK. Included outcomes were pooled as standardized mean differences (SMD) or risk ratios (RR) using random effects models. Inter-study heterogeneity was assessed using the Q-test and I2 statistic. RESULTS Seven (of 163) studies met all the inclusion and exclusion criteria. Meta-analysis showed a significantly better BCVA 12 months postoperatively, but an increased re-bubbling rate in eyes after DMEK compared with eyes after UT-DS(A)EK (BCVA: SMD = 0.50 [95% CI 0.27-0.74] and re-bubbling rate: RR = 0.33 [95% CI 0.16-0.67]). All other parameters did not differ significantly between both interventions, although estimates were imprecise (graft failure: RR = 0.65 [95% CI 0.18-2.30], graft rejection: RR = 1.40 [95% CI 0.27-7.30], and postoperative intraocular pressure elevation: RR = 1.14 [95% CI 0.60-2.18]). Postoperative SMDs of ECD could not be evaluated due to significant heterogeneity between studies. CONCLUSIONS Although the improvement in BCVA was higher after UT-DS(A)EK than after conventional DS(A)EK, the BCVA after DMEK was still superior. The complication rates were comparable for both procedures, except for the higher rate of re-bubbling after DMEK.
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Affiliation(s)
- Anna-Karina B Maier
- From Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Department of Ophthalmology, Berlin, Germany (A-K.B.M, J.M., A.M.J., T.D-N.).
| | - Jonas Milek
- From Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Department of Ophthalmology, Berlin, Germany (A-K.B.M, J.M., A.M.J., T.D-N.)
| | - Antonia M Joussen
- From Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Department of Ophthalmology, Berlin, Germany (A-K.B.M, J.M., A.M.J., T.D-N.)
| | - Tina Dietrich-Ntoukas
- From Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Department of Ophthalmology, Berlin, Germany (A-K.B.M, J.M., A.M.J., T.D-N.)
| | - Gregor Lichtner
- Universitätsmedizin Greifswald, Department of Anesthesia, Critical Care, Emergency and Pain Medicine, Greifswald, Germany (G.L.)
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Clinical Outcomes of Preloaded Descemet Membrane Endothelial Keratoplasty With Endothelium Inward: A 24-Month Comparative Analysis Between Fuchs Endothelial Corneal Dystrophy and Bullous Keratopathy. Cornea 2022:00003226-990000000-00121. [PMID: 36538420 DOI: 10.1097/ico.0000000000003138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 07/25/2022] [Indexed: 12/24/2022]
Abstract
PURPOSE The aim of this study was to compare long-term clinical outcomes of preloaded Descemet membrane endothelial keratoplasty (DMEK) between Fuchs endothelial corneal dystrophy (FECD) and bullous keratopathy (BK). METHODS In this single-center retrospective clinical case series, 71 eyes of 64 patients indicated with FECD (62%) or BK (38%) (with or without cataract) were treated with preloaded DMEK grafts between March 2018 and February 2020. Standard DMEK peeling, followed by manual folding of the tissue with endothelium-inward orientation and storing in a preloaded fashion inside a 2.2-mm intraocular lens cartridge. All tissues were delivered using a bimanual pull-through technique, followed by air tamponade. Graft unfolding time, endothelial cell loss, corrected distance visual acuity, central corneal thickness, rebubbling rate, and intraoperative and postoperative complications at 1, 3, 6, 12, and 24 months were recorded. RESULTS The mean intraoperative graft unfolding time in FECD did not differ from the BK group ( P = 0.6061). Cystoid macular edema did not differ in either group ( P = 0.6866). The rebubbling rate was found to be significantly higher in FECD compared with the BK group ( P = 0.0423). Corrected distance visual acuity significantly improved at the first month after surgery ( P = 0.0012), with no differences between FECD and BK at 24 months ( P = 0.2578). Central corneal thickness was stable postoperatively and showed no differences between the groups ( P = 0.3693). Significantly higher endothelial cell counts were observed in the FECD group at 24 months ( P = 0.0002). CONCLUSIONS Preloaded DMEK with "endothelium-in" offers acceptable intraoperative time, rebubbling rate, and clinical outcomes in both FECD and BK groups. Patients with FECD show better postoperative clinical outcomes even if the rebubbling rate is relatively high.
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11
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Perone JM, Goetz C, Zevering Y, Derumigny A, Bloch F, Vermion JC, Lhuillier L. Graft Thickness at 6 Months Postoperatively Predicts Long-Term Visual Acuity Outcomes of Descemet Stripping Automated Endothelial Keratoplasty for Fuchs Dystrophy and Moderate Phakic Bullous Keratopathy: A Cohort Study. Cornea 2022; 41:1362-1371. [PMID: 34690269 DOI: 10.1097/ico.0000000000002872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 07/28/2021] [Indexed: 11/26/2022]
Abstract
PURPOSE It remains unclear whether preoperative central graft thickness (CGT) contributes to visual outcomes of Descemet stripping automated endothelial keratoplasty (DSAEK). This retrospective cohort study examined the ability of preoperative and postoperative CGT to predict 12-month best spectacle-corrected visual acuity (BSCVA) after DSAEK for Fuchs endothelial corneal dystrophy/moderate pseudophakic bullous keratopathy/second graft. METHODS All consecutive patients who underwent DSAEK in 2015 to 2018 were included. The primary end point was 12-month BSCVA. DSAEK-CGT was measured preoperatively and 6 times between postoperative day 8 and month 12. Eyes were divided according to preoperative CGT 130 μm (ultrathin-DSAEK threshold) or 6-month postoperative CGT 100 μm (mean 6-month postoperative DSAEK-CGT). The t test assessed CGT evolution of the 4 groups over time. Multivariate analyses examined whether preoperative CGT or 6-month CGT categories predicted 12-month BSCVA. Multivariate analysis assessed the preoperative/perioperative factors that predicted 6-month CGT. RESULTS A total of 108 eyes (68 patients) underwent DSAEK. Preoperative CGT was >130 and ≤130 μm in 87 and 21 eyes, respectively. Postoperative CGT was >100 and ≤100 μm in 50 and 58 eyes, respectively. Thin 6-month postoperative grafts thinned significantly more relative to preoperative thickness than thick grafts ( P < 0.001). Preoperative CGT subgroups did not show this difference. Six-month postoperative CGT ( P = 0.01), but not preoperative CGT, predicted 12-month BSCVA. Preoperative CGT strongly predicted 6-month CGT ( P = 0.0003). CONCLUSIONS Postoperative, but not preoperative, DSAEK-CGT predicted 6-month BSCVA. The correlation between preoperative and postoperative CGT and interstudy variation in preoperative CGT measurement accuracy may explain literature disparities regarding the importance of preoperative CGT in DSAEK outcomes.
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Affiliation(s)
- Jean-Marc Perone
- Department of Ophthalmology, Metz-Thionville Regional Hospital Center, Mercy Hospital, Metz, France
| | - Christophe Goetz
- Clinical Research Support Unit, Metz-Thionville Regional Hospital Center, Mercy Hospital, Metz, France; and
| | - Yinka Zevering
- Department of Ophthalmology, Metz-Thionville Regional Hospital Center, Mercy Hospital, Metz, France
| | - Alexis Derumigny
- Department of Applied Mathematics, Delft University of Technology, Delft, the Netherlands
| | - Florian Bloch
- Department of Ophthalmology, Metz-Thionville Regional Hospital Center, Mercy Hospital, Metz, France
| | - Jean-Charles Vermion
- Department of Ophthalmology, Metz-Thionville Regional Hospital Center, Mercy Hospital, Metz, France
| | - Louis Lhuillier
- Department of Ophthalmology, Metz-Thionville Regional Hospital Center, Mercy Hospital, Metz, France
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Knutsson KA, Savini G, Hoffer KJ, Lupardi E, Bertuzzi F, Taroni L, Schiano-Lomoriello D, Paganoni G, Rama P. IOL Power Calculation in Eyes Undergoing Combined Descemet Membrane Endothelial Keratoplasty and Cataract Surgery. J Refract Surg 2022; 38:435-442. [PMID: 35858193 DOI: 10.3928/1081597x-20220601-02] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
PURPOSE To assess the accuracy of different corneal powers for intraocular (IOL) power calculation in combined Descemet membrane endothelial keratoplasty (DMEK) and cataract surgery and investigate whether preoperative parameters correlate to the prediction error (PE). METHODS This prospective case series involved patients with Fuchs endothelial dystrophy receiving combined DMEK and cataract surgery. Preoperatively, patients underwent optical biometry and anterior segment OCT (AS-OCT). AS-OCT measurements were repeated 6 months postoperatively, when final refraction was assessed. The PE was calculated using the preoperative average keratometry (Kave) measured by the optical biometer and User Group for Laser Interference Biometry (ULIB) constants. It was also calculated, after constant optimization, using the preoperative Kave from both devices and the total corneal power (TCP) measured by AS-OCT, as well as the postoperative Kave and TCP measured by AS-OCT. RESULTS ULIB constants resulted in the highest hyperopic PE (P < .0001). Constant optimization improved the results, because the PE was zeroed out and the absolute PEs decreased. No significant difference was found among the Barrett Universal II, Emmetropia Verifying Optical 2.0, Haigis, Hoffer Q, Holladay 1, Kane, and SRK/T formulas. Further improvement was achieved with the postoperative Kave and TCP, although the accuracy remained moderate. The PE based on preoperative corneal measurements was correlated to the amount of corneal flattening; the latter could be predicted by multiple linear regression accounting for anterior and posterior corneal radii (P = .0002) and was correlated to the preoperative anterior/posterior ratio. CONCLUSIONS Constant optimization is beneficial for combined DMEK and phacoemulsification. Predicting postoperative corneal flattening may improve the results of IOL power accuracy. [J Refract Surg. 2022;38(7):435-442.].
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13
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Efficacy of Thin and Ultrathin Descemet Stripping Automated Endothelial Keratoplasty and Influence of Graft Thickness on Postoperative Outcomes: Systematic Review and Meta-analysis. Am J Ophthalmol 2022; 240:170-186. [PMID: 35346623 DOI: 10.1016/j.ajo.2022.03.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 03/08/2022] [Accepted: 03/17/2022] [Indexed: 12/29/2022]
Abstract
PURPOSE To conduct a systematic review and meta-analysis on the efficacy of thin and ultrathin Descemet stripping automated endothelial keratoplasty (T-DSAEK and UT-DSAEK, with graft thickness <130 and <100 µm, respectively), depending on graft thickness. DESIGN Systematic review and meta-analysis. METHOD PubMed, Cochrane Library, Embase, ClinicalTrials.gov, and ScienceDirect databases were searched until October 1, 2021. We computed random-effect meta-analysis on postoperative outcomes of T/UT-DSAEK, stratified by graft thickness (<80 μm, 80-100 μm, and 100-130 μm). The main postoperative outcome was visual acuity (logarithm of the minimum angle of resolution [logMAR]). Secondary outcomes were pachymetry (μm), endothelial cell count (cell/mm2), spherical equivalent (diopter [D]), rebubbling rate (%), and rejection rate (%). Meta-regressions compared postoperative outcomes depending on graft thickness and search for putative confusion factors. RESULTS We included 47 articles for a total of 2141 eyes of 2040 patients. T/UT-DSAEK globally improved visual acuity (effect size = -0.38 logMAR [95% confidence interval {CI} -0.46 to -0.30 logMAR]), without difference depending on graft thickness. Overall, pachymetry improved (-60.6 µm [95% CI -101 to -19.7 µm]), endothelial cell count decreased (-1039 cells/mm2 [95% CI -1209 to -868 cells/mm2), spherical equivalent resulted in a hyperopic shift (0.74 D [95% CI -0.50 to 1.97 D), the graft rejection rate was 0.2% (95% CI -0.1% to 0.4%), and the rebubbling rate was 8.7% (95% CI 6.8%-10.5%). Grafts >100 μm induced a hyperopic shift. Metaregressions did not demonstrate differences between the 3 groups (<80 μm, 80-100 μm, or 100-130 μm) in any outcomes. CONCLUSION All T/UT-DSAEK thickness groups provided similar visual acuity, pachymetry, endothelial cell count, rejection rate, and rebubbling rate regardless of graft thickness. A hyperopic shift was induced by grafts >100 μm.
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Yeu E, Gomes JAP, Ayres BD, Chan CC, Gupta PK, Beckman KA, Farid M, Holland EJ, Kim T, Starr CE, Mah FS. Posterior lamellar keratoplasty: techniques, outcomes, and recent advances. J Cataract Refract Surg 2021; 47:1345-1359. [PMID: 33769774 DOI: 10.1097/j.jcrs.0000000000000634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 01/22/2021] [Indexed: 10/21/2022]
Abstract
Over the past 2 decades, posterior lamellar keratoplasty (PLK) has emerged as an alternative to penetrating keratoplasty in the treatment of corneal endothelial disorders. The reasons for this trend include the search for a safer procedure to replace diseased endothelium that provides faster and better visual rehabilitation and reduces the need for postoperative care. Different surgical techniques, surgical instruments, devices, and lasers have been introduced to overcome technical difficulties, thus improving clinical outcomes. Yet, surgeons and eye banks must address the complications and limitations that arise during the transition to these new techniques. This review discusses the most significant aspects of the evolution of PLK, including a detailed description of current techniques and the direction of future treatment for corneal endothelial disease with the use of laser-assisted surgery, bioengineered corneas, cell therapy, and new pharmacologic therapy.
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Affiliation(s)
- Elizabeth Yeu
- From the Eastern Virginia Medical School and Virgina Eye Consultants, Norfolk, Virginia (Yeu); Department of Ophthalmology, UNIFESP/EPM and Instituto Suel Abujamra, Sao Paulo, Brazil (Gomes); Wills Eye Hospital, Philadelphia, Pennsylvania (Ayres); University of Toronto, Ontario, and the Eye Bank of Canada, Ontario Division, Ontario, Canada (Chan); Duke Eye Center, Durham, North Carolina (Gupta); Comprehensive Eyecare of Central Ohio, Westerville (Beckman); Department of Ophthalmology, Ohio State University, Columbus (Beckman); Gavin Herbert Eye Institute, University of California, Irvine (Farid); Department of Ophthalmology, University of Cincinnati, and Cincinnati Eye Institute, Cincinnati, Ohio (Holland); Duke Eye Center and Duke University School of Medicine, Durham, North Carolina (Kim); Weill Cornell Medicine and New York Presbyterian Hospital, New York, New York (Starr); Scripps Clinic Medical Group, La Jolla, California (Mah)
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15
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Matsou A, Pujari R, Sarwar H, Rana M, Myerscough J, Thomson SM, Nandakumar G, Zhang J, Rajan MS. Microthin Descemet Stripping Automated Endothelial Keratoplasty Versus Descemet Membrane Endothelial Keratoplasty: A Randomized Clinical Trial. Cornea 2021; 40:1117-1125. [PMID: 33156076 DOI: 10.1097/ico.0000000000002601] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 09/25/2020] [Indexed: 11/25/2022]
Abstract
PURPOSE To compare visual outcomes, complications, and vision-related quality of life (QoL) after microthin Descemet stripping automated endothelial keratoplasty (MT-DSAEK) versus Descemet membrane endothelial keratoplasty (DMEK) for the management of corneal endothelial dysfunction in Fuchs dystrophy. METHODS This is a prospective, double-blinded randomized controlled clinical trial. Patients with visually significant endothelial decompensation from Fuchs dystrophy were prospectively randomized to receive MT-DSAEK or DMEK surgery. The primary outcome was best spectacle-corrected visual acuity (BSCVA) at 12 months. Secondary outcomes included refraction, keratometry, endothelial cell count, complications, and vision-related QoL at 6 and 12 months postoperatively. RESULTS A total of 56 eyes of 56 patients were enrolled, 28 in each group. Postoperatively, LogMAR mean BSCVA in the MT-DSAEK group was 0.17 ± 0.08 and 0.11 ± 0.09 at 6 and 12 months compared with 0.09 ± 0.13 and 0.04 ± 0.13 after DMEK (P = 0.03, P = 0.002 respectively) with the DMEK cohort achieving 3.5 logarithm of the minimum angle of resolution letters better BSCVA at 1 year compared with MT-DSAEK. Complication rates were similar with 3.5% rebubbling rate in both groups, 1 primary graft failure in DMEK and a single endothelial rejection in the MT-DSAEK arm. Vision-related QoL was comparable at 6 and 12 months postoperatively, and no eyes demonstrated loss of vision from preoperative BSCVA. CONCLUSIONS DMEK surgery resulted in significantly better BSCVA at 1, 3, 6, and 12 months postoperatively compared with MT-DSAEK. Patient satisfaction was similar with no differences reported in vision-related QoL scores, as was the complications profile between groups. Thus, our results favor DMEK as the better choice procedure for eyes with Fuchs-related corneal decompensation without ocular comorbidities.
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Affiliation(s)
- Artemis Matsou
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
| | - Rathin Pujari
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
| | - Hammad Sarwar
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
| | - Mrinal Rana
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
| | - James Myerscough
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
| | - Susan M Thomson
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
| | - Girinath Nandakumar
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
| | - Jufen Zhang
- Vision and Eye Research Institute, School of Medicine, Faculty of Health, Education, Medicine and Social Care, Anglia Ruskin University, Cambridge, UK
| | - Madhavan S Rajan
- Department of Ophthalmology, Cambridge University Hospitals and Cambridge Eye Research Centre, Cambridge, UK; and
- Vision and Eye Research Institute, School of Medicine, Faculty of Health, Education, Medicine and Social Care, Anglia Ruskin University, Cambridge, UK
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16
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Ruzza A, Parekh M, Avoni L, Wojcik G, Ferrari S, Desneux L, Ponzin D, Levis HJ, Romano V. Ultra-thin DSAEK using an innovative artificial anterior chamber pressuriser: a proof-of-concept study. Graefes Arch Clin Exp Ophthalmol 2021; 259:1871-1877. [PMID: 33907884 DOI: 10.1007/s00417-021-05194-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 03/23/2021] [Accepted: 04/07/2021] [Indexed: 11/25/2022] Open
Abstract
PURPOSE To report the impact of establishing and maintaining a high intracameral pressure (ICP) of 200 mmHg on UT-DSAEK graft preparation using an artificial anterior chamber pressuriser (ACP) control unit (Moria SA, Antony, France). METHOD Retrospective laboratory and clinical study. Four paired donor corneas were mounted on an artificial anterior chamber and subjected to 70 mmHg ("low") and 200 mmHg ("high") ICP using an ACP system. The central corneal thinning rate was measured after 5 min using AS-OCT and the endothelial cell viability was analysed using trypan blue and live/dead staining following 70 mmHg and 200 mmHg ICP. Visual outcomes and complications in a clinical case series of nine patients with bullous keratopathy who underwent UT-DSAEK using 200 mmHg ICP during graft preparation are reported. RESULTS Laboratory outcomes showed 2 ± 1% and 2 ± 2% dead cells following 70 mmHg and 200 mmHg ICP respectively. Percentage viability in the 70 mmHg group (52.94 ± 5.88%) was not found to be significantly different (p = 0.7) compared to the 200 mmHg group (59.14 ± 10.43%). The mean corneal thinning rate after applying 200 mmHg ICP was 27 ± 13 μm/min centrally (7.2%/min). In the clinical case series, two cases were combined with cataract surgery. Re-bubbling rate was 11%. At the last follow-up (259 ± 109 days), graft thickness was 83 ± 22 μm centrally, endothelial cell density was 1175 ± 566 cell/mm2 and the BCVA of 0.08 ± 0.12 logMAR was recorded with no episodes of rejection. CONCLUSION ACP control unit for UT-DSAEK graft preparation helps in consistently obtaining UT-DSAEK grafts without compromising endothelial cell viability.
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Affiliation(s)
- Alessandro Ruzza
- International Centre for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Via Padiglione Rama, Zelarino, 30174, Venice, Italy.
| | - Mohit Parekh
- International Centre for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Via Padiglione Rama, Zelarino, 30174, Venice, Italy
- Institute of Ophthalmology, University College London, London, UK
| | - Luca Avoni
- Unita Operativa Oculistica Di Ravenna, Azienda USL Della Romagna, Emilia Romagna, Italy
| | - Gabriela Wojcik
- International Centre for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Via Padiglione Rama, Zelarino, 30174, Venice, Italy
| | - Stefano Ferrari
- International Centre for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Via Padiglione Rama, Zelarino, 30174, Venice, Italy
| | | | - Diego Ponzin
- International Centre for Ocular Physiopathology, Fondazione Banca degli Occhi del Veneto Onlus, Via Padiglione Rama, Zelarino, 30174, Venice, Italy
| | - Hannah J Levis
- Department of Eye and Vision Science, University of Liverpool, Liverpool, UK
| | - Vito Romano
- Department of Eye and Vision Science, University of Liverpool, Liverpool, UK
- Department of Ophthalmology, St. Paul's Eye Unit, Royal Liverpool University Hospital, Liverpool, UK
- Instituto Universitario Fernandez-Vega, Universidad de Oviedo and Fundacion de Investigacion on Oftalmologica, Oviedo, Spain
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Single-Pass Mikrokeratome and Anterior Chamber Pressurizer for the Ultrathin Descemet-Stripping Automated Endothelial Keratoplasty Graft Preparation. Cornea 2021; 40:755-763. [PMID: 33630814 DOI: 10.1097/ico.0000000000002607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 10/01/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE To compare the reliability of microkeratome dissection with the anterior chamber pressurizer (ACP) system versus conventional pressurization for ultrathin Descemet-stripping automated endothelial keratoplasty (UT-DSAEK) graft preparation. METHODS A retrospective review of a consecutive series of dissected donor corneas processed at Pavia Eye Bank for UT-DSAEK surgery was performed. Grafts were prepared through single-pass microkeratome dissection with artificial anterior chamber internal pressure regulation through either ACP or the conventional method using a water column with tube clamp. The target central graft thickness (CGT) was ≤100 μm. Cutting predictability was determined as the difference between the microkeratome head size and the thickness actually removed. Graft regularity was investigated as central-to-peripheral thickness increase, central-to-peripheral (CP) ratio, and graft thickness uniformity. Thickness was measured with anterior segment optical coherence tomography (horizontal and vertical meridians). RESULTS Of the 265 UT-DSAEK grafts, ACP achieved the target "CGT ≤ 100 μm" in 87 of 120 (72.5%), whereas the conventional technique achieved the same in 85 of 145 (58.6%) (P = 0.018). ACP predictability was -3.9 μm (SD: 2.3), whereas predictability of the conventional technique was -54.6 μm (SD: 3.7) (P < 0.001). Thickness increased similarly (P = 0.212); CP ratio was better with ACP for only 2 mm diameter (P = 0.001); graft thickness uniformity was comparable (P > 0.05). CONCLUSIONS Compared with conventional pressurization, ACP improved microkeratome-assisted preparation reliability of UT-DSAEK grafts, achieving CGT ≤ 100 μm with significantly higher frequency (P = 0.018) and predictability (P < 0.001). ACP improved CP ratio only at 2 mm (P = 0.001); for other graft thickness, the 2 methods proved equivalent.
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Directed Differentiation of Human Pluripotent Stem Cells towards Corneal Endothelial-Like Cells under Defined Conditions. Cells 2021; 10:cells10020331. [PMID: 33562615 PMCID: PMC7915025 DOI: 10.3390/cells10020331] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 12/13/2022] Open
Abstract
The most crucial function of corneal endothelial cells (CEnCs) is to maintain optical transparency by transporting excess fluid out of stroma. Unfortunately, CEnCs are not able to proliferate in vivo in the case of trauma or dystrophy. Visually impaired patients with corneal endothelial deficiencies that are waiting for transplantation due to massive global shortage of cadaveric corneal transplants are in a great need of help. In this study, our goal was to develop a defined, clinically applicable protocol for direct differentiation of CEnCs from human pluripotent stem cells (hPSCs). To produce feeder-free hPSC-CEnCs, we used small molecule induction with transforming growth factor (TGF) beta receptor inhibitor SB431542, GSK-3-specific inhibitor CHIR99021 and retinoic acid to guide differentiation through the neural crest and periocular mesenchyme (POM). Cells were characterized by the morphology and expression of human (h)CEnC markers with immunocytochemistry and RT-qPCR. After one week of induction, we observed the upregulation of POM markers paired-like homeodomain transcription factor 2 (PITX2) and Forkhead box C1 (FOXC1) and polygonal-shaped cells expressing CEnC-associated markers Zona Occludens-1 (ZO-1), sodium-potassium (Na+/K+)-ATPase, CD166, sodium bicarbonate cotransporter 1 (SLC4A4), aquaporin 1 (AQP1) and N-cadherin (NCAD). Furthermore, we showed that retinoic acid induced a dome formation in the cell culture, with a possible indication of fluid transport by the differentiated cells. Thus, we successfully generated CEnC-like cells from hPSCs with a defined, simple and fast differentiation method.
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Deshmukh R, Nair S, Ting DSJ, Agarwal T, Beltz J, Vajpayee RB. Graft detachments in endothelial keratoplasty. Br J Ophthalmol 2021; 106:1-13. [PMID: 33397659 DOI: 10.1136/bjophthalmol-2020-318092] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/14/2020] [Accepted: 12/19/2020] [Indexed: 12/23/2022]
Abstract
Graft detachment is the most common complication of endothelial keratoplasty. With the ongoing advancements in the field of endothelial keratoplasty, our understanding of risk factors of graft detachments and its management has been evolving. Various prevention measures have been described in literature including presoaking the donor graft, anterior chamber tamponade, venting incisions, sutures to prevent dislocation of graft. Management of a detached graft involves secondary interventions such as rebubbling, suturing and regrafts. In this review, we discuss graft detachment in different types of endothelial keratoplasty techniques including Descemet stripping endothelial keratoplasty, Descemet stripping automated endothelial keratoplasty and Descemet's membrane endothelial keratoplasty; with emphasis on incidence, risk factors, preventive measures and their management.
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Affiliation(s)
- Rashmi Deshmukh
- Department of Ophthalmology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Sridevi Nair
- Department of Ophthalmology, All India Institute of Medical Sciences Dr RP Centre for Ophthalmic Sciences, New Delhi, India
| | - Darren Shu Jeng Ting
- Academic Ophthalmology, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Tushar Agarwal
- Department of Ophthalmology, All India Institute of Medical Sciences Dr RP Centre for Ophthalmic Sciences, New Delhi, India
| | - Jacqueline Beltz
- Department of Ophthalmology, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia
| | - Rasik B Vajpayee
- Department of Ophthalmology, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia .,Centre for Eye Research Australia, The University of Melbourne, Melbourne, Victoria, Australia.,Department of Ophthalmology, Vision Eye Institute Ltd, Melbourne, Victoria, Australia
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20
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Walter K, Hartel J, Hess JP, Joubert E, Lee RY. Incidence of Ultrathin Descemet Stripping Endothelial Keratoplasty Corneal Graft Rejection following Steroid Discontinuation. Curr Eye Res 2020; 46:930-935. [PMID: 33290663 DOI: 10.1080/02713683.2020.1862236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Purpose/Aims: To determine the incidence of corneal graft rejection in patients with approximately 1 year of steroid therapy following uDSEK. A shortened course of corticosteroids may be beneficial and a viable option in Ultrathin Descemet's Stripping Endothelial Keratoplasty (uDSEK).Materials and Methods: This retrospective cohort study evaluated corneal graft rejection rate in 170 cases of uDSEK that met inclusion criteria with approximately 1 year of steroid therapy. Corneal graft rejection was defined by anterior chamber cell/flare, keratic precipitates with/without corneal edema, and/or a rejection line. The following were collected retrospectively from January 1, 2005 through January 1, 2013: gender, age, race, indication for uDSEK, length of follow-up, length of steroid therapy. Continuous data were compared using Wilcoxon Rank Sum Test and categorical data were compared using Fisher's Exact Test.Results: The included eyes had an average length of steroid therapy of 431 days (range 85-720 days) with an average follow-up of 1274 days (range 395-3186 days). During the follow-up period without steroid, 5 of the 170 eyes were diagnosed with rejection (2.94%). Of the five eyes that experienced rejection, four eyes resolved after topical prednisone was reinstituted alone and did not require repeat uDSEK. The other eye was lost to follow-up. The cumulative probability of rejection after steroid cessation was calculated at 0.67% after 12 months, 2.20% after 18 months, 3.08% after 24 months, and 4.55% after 36 months.Conclusion: Discontinuation of topical steroid at approximately 1 year after uDSEK results in a low rate of corneal graft rejection and may prove extended use unnecessary.
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Affiliation(s)
- Keith Walter
- Ophthalmology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Jennifer Hartel
- Ophthalmology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Justin P Hess
- Brody School of Medicine, Greenville, North Carolina, USA
| | - Eloise Joubert
- Campbell University School of Osteopathic Medicine, Lillington, North Carolina, USA
| | - Roland Y Lee
- Ophthalmology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
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21
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Phacoemulsification in the Setting of Corneal Endotheliopathies: A Review. Int Ophthalmol Clin 2020; 60:71-89. [PMID: 32576725 DOI: 10.1097/iio.0000000000000315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Mencucci R, Favuzza E, Marziali E, Cennamo M, Mazzotta C, Lucenteforte E, Virgili G, Rizzo S. Ultrathin Descemet stripping automated endothelial keratoplasty versus Descemet membrane endothelial keratoplasty: a fellow-eye comparison. EYE AND VISION 2020; 7:25. [PMID: 32391399 PMCID: PMC7201595 DOI: 10.1186/s40662-020-00191-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 04/14/2020] [Indexed: 11/23/2022]
Abstract
Background To compare the visual outcome and patients’ satisfaction after ultrathin Descemet stripping automated endothelial keratoplasty (UT-DSAEK) and Descemet membrane endothelial keratoplasty (DMEK) performed on fellow eyes of the same patients. Methods In this retrospective study, the records of 18 pseudophakic patients affected by Fuchs endothelial dystrophy who underwent DMEK in one eye and UT-DSAEK in the fellow eye were reviewed. Best corrected visual acuity (BCVA), corneal pachymetry, keratometry, corneal aberrations, photopic and mesopic contrast sensitivity, and endothelial cell counts measured 12 months after surgery in either eye were analyzed and compared. The results of a satisfaction questionnaire were also reviewed. Results Twelve months after surgery, BCVA was not significantly different in UT-DSAEK and DMEK eyes (0.10 ± 0.04 and 0.07 ± 0.07 logMAR, respectively); at both 4- and 6 mm optical zones total and posterior corneal higher order aberrations (HOAs), posterior astigmatism and total coma were significantly lower after DMEK; BCVA in both groups was significantly correlated mainly with anterior corneal aberrations; contrast sensitivity was higher after DMEK especially in mesopic conditions and at medium spatial frequencies; the endothelial cell density was similar, although slightly higher in the UT-DSAEK group (p = 0.10). The satisfaction questionnaire showed that although patients were highly satisfied from both procedures, more than half of them preferred DMEK and reported a more comfortable and quicker postoperative recovery. Conclusions DMEK and UT-DSAEK showed no evidence of difference in terms of postoperative BCVA, although DMEK had a better performance in terms of contrast sensitivity, posterior corneal aberrations and overall patient satisfaction.
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Affiliation(s)
- Rita Mencucci
- 1Eye Clinic, Department of Neuroscience, Psychology, Pharmacology and Child Health (NEUROFARBA), University of Florence, Eye Clinic, Largo Brambilla 3, 50134 Florence, Italy
| | - Eleonora Favuzza
- 1Eye Clinic, Department of Neuroscience, Psychology, Pharmacology and Child Health (NEUROFARBA), University of Florence, Eye Clinic, Largo Brambilla 3, 50134 Florence, Italy
| | - Elisa Marziali
- 1Eye Clinic, Department of Neuroscience, Psychology, Pharmacology and Child Health (NEUROFARBA), University of Florence, Eye Clinic, Largo Brambilla 3, 50134 Florence, Italy
| | - Michela Cennamo
- 1Eye Clinic, Department of Neuroscience, Psychology, Pharmacology and Child Health (NEUROFARBA), University of Florence, Eye Clinic, Largo Brambilla 3, 50134 Florence, Italy
| | - Cosimo Mazzotta
- 2Department of Medicine, Surgery and Neurosciences, Ophthalmology Unit, Siena University, Siena, Italy.,Siena Crosslinking Center, Siena, Italy
| | - Ersilia Lucenteforte
- 4Department of Clinical and Experimental medicine, University of Pisa, Pisa, Italy
| | - Gianni Virgili
- 1Eye Clinic, Department of Neuroscience, Psychology, Pharmacology and Child Health (NEUROFARBA), University of Florence, Eye Clinic, Largo Brambilla 3, 50134 Florence, Italy
| | - Stanislao Rizzo
- 1Eye Clinic, Department of Neuroscience, Psychology, Pharmacology and Child Health (NEUROFARBA), University of Florence, Eye Clinic, Largo Brambilla 3, 50134 Florence, Italy
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23
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Abstract
PURPOSE To report 5-year outcomes of ultrathin Descemet stripping automated endothelial keratoplasty (UT-DSAEK) with a central graft thickness intended to be <100 μm. METHODS This retrospective, consecutive, interventional case series included 354 eyes with endothelial decompensation due to various causes (Fuchs endothelial dystrophy, pseudophakic or aphakic bullous keratopathy, failed previous graft, herpetic endothelitis, or buphthalmos). Donor tissue was prepared using the microkeratome-assisted double-pass technique aiming at a graft thickness <100 μm. The Descemet membrane was stripped under air. The graft was delivered into the anterior chamber using the pull-through technique through a 3.2-mm clear corneal incision using a modified Busin glide. The best spectacle-corrected visual acuity (BSCVA), endothelial cell loss, graft survival rates, and immunologic rejection rates were evaluated. RESULTS Follow-up data at 1, 2, 3, and 5 years after UT-DSAEK were collected from 214, 172, 147, and 105 eyes, respectively. After excluding eyes with comorbidities, BSCVA better than or equal to 20/20 was recorded in 36.3%, 37.4%, 46.4%, and 53.4% of eyes, respectively, whereas BSCVA better than or equal to 20/40 was documented in 95.5%, 95.3%, 96.0%, and 96.6% of eyes, respectively. The mean endothelial cell loss was 35.4%, 42.3%, 43.3%, and 52.3%; Kaplan-Meier graft survival probability was 99.1%, 96.2%, 94.2%, and 94.2%, and Kaplan-Meier cumulative probability of a rejection episode was 3.4%, 4.3%, 5%, and 6.9% at 1, 2, 3, and 5 years, respectively. CONCLUSIONS UT-DSAEK grafts allow excellent 5-year outcomes, including BSCVA, endothelial cell density, and survival rates comparable with those recorded post-Descemet membrane endothelial keratoplasty, but with a higher immunologic rejection rate.
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24
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Abstract
PURPOSE OF REVIEW Endothelial keratoplasty has evolved tremendously since its inception. Thick Descemet stripping automated endothelial keratoplasty (DSAEK) grafts have made sway for slimmer ultrathin Descemet stripping automated endothelial keratoplasty (UT-DSAEK). This review discusses the recent literature comparing outcomes of UT-DSAEK, DSAEK, and Descemet membrane endothelial keratoplasty (DMEK). RECENT FINDINGS DMEK provides quick visual recovery and has remarkably low incidence of graft rejection. However, the learning curve is long compared to DSAEK. UT-DSAEK utilizes donor grafts less than 100-μm thick. Recent studies comparing DMEK and UT-DSAEK have shown DMEK has better visual outcomes with similar rejection rates. SUMMARY UT-DSAEK remains an excellent surgical option for endothelial keratoplasty in eyes with complex anterior segment anatomy. The visual outcomes after UT-DSAEK have been shown to be superior when compared with DSAEK. Recent studies show that DMEK provides better visual outcomes compared with UT-DSAEK.
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25
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Abstract
PURPOSE The purpose of this study is to describe a simple but novel 60-second swelling technique for ultrathin Descemet stripping automated endothelial keratoplasty (DSAEK) graft preparation. In addition, we aim to demonstrate the effectiveness of this technique in obtaining thinner DSAEK grafts more consistently without compromising graft quality. METHODS We performed a retrospective case-control study comparing standard DSAEK preparation using an ML7 Microkeratome Donor Cornea System (Med-Logics Inc, Athens, TX) with an additional 60 seconds of stromal swelling with a balanced salt solution after the removal of the epithelium but before the microkeratome pass. Thirty cases using this novel swelling technique were compared with controls matched by age, sex, and precut corneal thickness. Donor characteristics and both precut and postcut graft characteristics were analyzed. RESULTS DSAEK grafts prepared with our simple swelling method were approximately 13 μm thinner on average than those prepared with our conventional ultrathin DSAEK preparation technique (P = 0.001). The frequency of grafts less than 100 μm was much greater with swelling (93.3% vs. 63.3% with conventional technique, P = 0.0052). There were no significant differences in postcut cell counts or decrease in cell counts between the groups. CONCLUSIONS A simple 60-second swelling technique can yield significantly thinner DSAEK tissue in a more consistent range without a significant impact on the endothelial cell count.
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26
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Agha B, Shajari M, Slavik-Lencova A, Kohnen T, Schmack I. Outcome of Descemet membrane endothelial keratoplasty for graft failure after Descemet stripping automated endothelial keratoplasty. Clin Ophthalmol 2019; 13:553-559. [PMID: 30988597 PMCID: PMC6438261 DOI: 10.2147/opth.s194185] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose To investigate the efficacy and safety of Descemet membrane endothelial keratoplasty (DMEK) for corneal decompensation following primary Descemet stripping automated endothelial keratoplasty (DSAEK). Methods This was a retrospective case series of 15 patients that underwent DMEK surgery for corneal decompensation after failed DSAEK. Main outcome parameter was corrected distance visual acuity (CDVA) after DMEK and DSAEK. Secondary outcome measures included central corneal thickness (CCT), endothelial cell density (ECD), rebubbling rate, and primary graft failure after DMEK. Explanted DSAEK grafts were evaluated by light microscopy. Results The mean (±SD) time period between DSAEK and DMEK surgery was 15±8 months (range, 6–31 months). Preoperative CDVA was 1.72±0.62 (logMAR). After DMEK, CDVA improved significantly to 0.78±0.48 at 1 month and to 0.23±0.24 after 12 months (P=0.022). Visual acuity data after DMEK were significantly better compared to preoperative values. The average CCT after DMEK decreased significantly from 869±210 µm (preoperative) to 505±45 µm (1 month postoperative) (P<0.001) and remained stable over 12 months. The ECD decreased from 2,589±209/mm2 (preoperative) to 1,691±589/mm2 (12 months postoperative). Rebubbling DMEK was required in three patients (=20%). Conclusion DMEK represents a feasible and safe procedure in achieving better functional results compared to DSAEK. Visual acuity and optical quality can be effectively reestablished after unsuccessful primary DSAEK surgery even in patients with long-standing corneal decompensation. Further investigations are required to validate the preliminary clinical findings.
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Affiliation(s)
- Bishr Agha
- Department of Ophthalmology, Goethe-University, Frankfurt am Main, Germany,
| | - Mehdi Shajari
- Department of Ophthalmology, Goethe-University, Frankfurt am Main, Germany,
| | | | - Thomas Kohnen
- Department of Ophthalmology, Goethe-University, Frankfurt am Main, Germany,
| | - Ingo Schmack
- Department of Ophthalmology, Goethe-University, Frankfurt am Main, Germany,
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27
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Spadea L, Tonti E, Napolitano R. Different graft thicknesses after Descemet stripping endothelial keratoplasty for bullous keratopathy in the two eyes of the same patient. Int Med Case Rep J 2019; 12:55-59. [PMID: 30881147 PMCID: PMC6398396 DOI: 10.2147/imcrj.s192650] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Objective To describe a very unique case of two Descemet stripping automated endothelial keratoplasty (DSAEK) surgeries performed in both eyes of the same patient with an extremely different graft thickness and overall corneal thickness but with the same corrected distance visual acuity (CDVA) 2 years after surgery. Case presentation A 75-year-old woman with bilateral bullous keratopathy (BK) was submitted to DSAEK surgeries in both eyes, first in right and after 6 months in left eye. CDVA was 20/160 in the right eye and 20/63 in the left eye. Corneal thickness evaluated by anterior segment optical coherence tomography was 569 µm in the right eye and 560 µm in the left eye. The root mean square (RMS) was 2.1 in the right and left eyes. Endothelial cell densities were not detectable in both eyes. The estimated precut donor graft thickness from eye bank was 250 and 40 µm in the right and in the left graft, respectively. Two years after surgery CDVA was 20/25 in both eyes. Corneal thickness was 633 µm with a lenticule thickness of 206 µm in the right eye and 439 µm with a lenticule thickness of 48 µm in the left eye. The RMS was 1.7 in the right eye and 1.4 in the left eye. Endothelial cell density was 2.272 cells/mm2 in the right and 2.154 cells/mm2 in the left eye. Conclusion DSAEK was safe and effective in the treatment of BK. In our report, the visual outcome resulted to be poorly related either to donor graft thickness or to postoperative corneal thickness.
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Affiliation(s)
- Leopoldo Spadea
- Eye Clinic, Department Sensory Organs, Policlinico "Umberto I", "Sapienza" University of Rome, Rome, Italy,
| | - Emanuele Tonti
- Eye Clinic, Department Sensory Organs, Policlinico "Umberto I", "Sapienza" University of Rome, Rome, Italy,
| | - Rita Napolitano
- Eye Clinic, Department Sensory Organs, Policlinico "Umberto I", "Sapienza" University of Rome, Rome, Italy,
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28
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Feizi S, Javadi MA. Effect of Donor Graft Thickness on Clinical Outcomes after Descemet Stripping Automated Endothelial Keratoplasty. J Ophthalmic Vis Res 2019; 14:18-26. [PMID: 30820282 PMCID: PMC6388529 DOI: 10.4103/jovr.jovr_55_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Purpose To evaluate the effects of donor graft thickness on postoperative best spectacle-corrected visual acuity (BSCVA), refractive outcomes, endothelial cell density (ECD) and function, intraocular pressure (IOP), and postoperative complications after Descemet stripping automated endothelial keratoplasty (DSAEK). Methods This retrospective, interventional case series enrolled 77 eyes of 64 patients who underwent DSAEK with or without simultaneous cataract surgery. Clinical outcomes, including BSCVA, refraction, keratometric astigmatism, IOP, and ECD were assessed at the final follow-up examination. Univariate analyses were used to investigate the effects of postoperative donor graft thickness on clinical outcomes and complications. Results The mean patient age was 62.3 ± 15.6 years, and the patients were followed for 26.2 ± 20.9 months postoperatively. The mean postoperative central graft thickness was 102.4 ± 31.6 μm. In the univariate analysis, postoperative central graft thickness was significantly associated with postoperative IOP (P = 0.005), central recipient thickness (P = 0.002), and ECD (P = 0.016). No significant association was found for central graft thickness with postoperative BSCVA (P = 0.70), spherical equivalent refraction (P = 0.33), keratometric astigmatism (P = 0.27), graft detachment (P = 0.16), graft decentration (P = 0.17), high IOP (P = 0.53), or endothelial rejection (P = 0.88). Conclusion This study failed to demonstrate any significant correlation between graft thickness and BSCVA. Attempting to minimize graft thickness might not have the desired outcome regarding endothelial cell density and function. Increased graft thickness could negatively impact the accuracy of IOP measurements after DSAEK.
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Affiliation(s)
- Sepehr Feizi
- Ocular Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Javadi
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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29
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Comparison of Graft Thickness Measured by an Eye Bank With Graft Thickness Measured After Descemet Stripping Automated Endothelial Keratoplasty. Cornea 2019; 38:403-408. [DOI: 10.1097/ico.0000000000001855] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Visual Outcomes of Ultrathin-Descemet Stripping Endothelial Keratoplasty versus Descemet Stripping Endothelial Keratoplasty. J Ophthalmol 2018; 2018:5924058. [PMID: 30515318 PMCID: PMC6237014 DOI: 10.1155/2018/5924058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 09/29/2018] [Accepted: 10/01/2018] [Indexed: 11/23/2022] Open
Abstract
Purpose To examine the impact of graft thickness (GT) on postoperative visual acuity and endothelial cell density after ultrathin-Descemet stripping automated endothelial keratoplasty (UT-DSAEK) versus conventional DSAEK. Methods The medical records of all patients who underwent DSAEK at our institute during a 2-year period were reviewed. After excluding subjects with low visual potential, 34 eyes were divided into two groups based on the postoperative GT as measured with anterior segment optical coherence tomography (AS-OCT): an UT-DSAEK group (GT ≤ 100 μm, n=13 eyes) and a DSAEK group (GT > 100 μm, n=21 eyes). The groups were compared with regard to best-corrected visual acuity (BCVA), subjective refraction, central corneal thickness (CCT), GT, and endothelial cell density (ECD). Results Preoperative BCVA (logMAR) was 1.035 ± 0.514 and 0.772 ± 0.428 for UT-DSAEK and DSAEK, respectively (P=0.072). At 6 months postoperatively, BCVA was 0.088 ± 0.150 following UT-DSAEK and 0.285 ± 0.158 following DSAEK (P=0.001). Conclusion DSAEK grafts with a thickness under 100 μm offered better visual outcomes during the early postoperative period.
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Abstract
Lamellar keratoplasty (LK) has revolutionized corneal graft surgery in several ways. Deep anterior LK (DALK) has eliminated risk of failure due to endothelial rejection. Endothelial keratoplasty (EK) has almost eliminated induced astigmatism and the “weak” graft–host junction as seen with penetrating keratoplasty (PK) and also reduced the risk of endothelial rejection. LK provided new insights into posterior corneal anatomy that led to better understanding and performance of DALK and to the development of another EK procedure, namely pre-Descemet's EK (PDEK). Surgical procedures for LK were further refined based on the improved understanding and are able to deliver better surgical outcomes in terms of structural integrity and long-term patient satisfaction, reducing the need of further surgeries and minimizing patient discomfort. In most specialist centers, anterior lamellar techniques like DALK and EK techniques like Descemet's stripping EK (DSEK) and Descemet's membrane EK (DMEK) have replaced the full-thickness PK where possible. The introduction of microkeratome, femtosecond laser, and PDEK clamp have made LK techniques easier and more predictable and have led to the innovation of another LK procedure, namely Bowman membrane transplant (BMT). In this article, we discuss the evolution of different surgical techniques, their principles, main outcomes, and limitations. To date, experience with BMT is limited, but DALK has become the gold standard for anterior LK. The EK procedures too have undergone a rapid transition from DSEK to DMEK and PDEK emerging as a viable option. Ultrathin-DSEK may still have a role in modern EK.
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Affiliation(s)
- Nadisha P Singh
- Division of Clinical Neuroscience, University of Nottingham, UK
| | - Dalia G Said
- Queen's Medical Centre, Nottingham University Hospitals NHS Trust; Division of Clinical Neuroscience, University of Nottingham, UK
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Jacob S. Use of Pressurized Air Infusion For Pre Descemet's Endothelial Keratoplasty (PDEK) - The Air Pump Assisted PDEK Technique. Open Ophthalmol J 2018; 12:175-180. [PMID: 30123382 PMCID: PMC6062895 DOI: 10.2174/1874364101812010175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 05/24/2018] [Accepted: 06/11/2018] [Indexed: 11/22/2022] Open
Abstract
Purpose: To assess the advantages offered by the air pump assisted PDEK technique that utilizes pressurized Anterior Chamber (AC) air infusion. Methods: Pressurized air infusion was provided through an anterior chamber maintainer connected to the fluid air exchange system of a posterior vitrectomy machine during surgery. Results: Pressurized air infusion within the AC helped perform Descemetorhexis, prevented bleeding during Peripheral Iridectomy (PI) and synechiolysis, prevented oozing of blood from peripheral corneal neovascularization into the AC and thus helped maintain a non-fibrinous AC environment. In addition, it helped in precise graft manipulation, centration, edge unfolding and unwrinkling after it was floated against the stroma as well as faster graft adhesion. It also prevented AC depth fluctuations during intra-cameral maneuvers and prevented intra-operative as well as post-operative graft detachment. Conclusions: This technique makes several steps of surgery easier and improves graft adhesion.
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Affiliation(s)
- Soosan Jacob
- Agarwal's Refractive and Cornea Foundation,Chennai,India.,Agarwal's Eye Hospital,Chennai,India
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33
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Comparison of Visual Acuity Outcomes Between Nanothin Descemet Stripping Automated Endothelial Keratoplasty and Descemet Membrane Endothelial Keratoplasty. Cornea 2018; 37:1226-1231. [DOI: 10.1097/ico.0000000000001697] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Kanavi MR, Chamani T, Kheiri B, Javadi MA. Single versus double pass technique for preparation of ultrathin Descemet's stripping automated endothelial keratoplasty tissues from donated whole eyes. Cell Tissue Bank 2018; 19:623-628. [PMID: 30008068 DOI: 10.1007/s10561-018-9712-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 07/12/2018] [Indexed: 10/28/2022]
Abstract
This study was conducted to analyze the preoperative thickness profile and endothelial rating of ultrathin Descemet's stripping automated endothelial keratoplasty (UT-DSAEK) tissues prepared with a single versus double microkeratome pass from donated whole eyes and corresponding eye bank postoperative results. Microkeratome-assisted UT-DSAEK tissues were prepared from freshly donated whole eyes with single-pass (SP) and double-pass (DP) technique in the Central Eye Bank of Iran. Preoperative thickness profiles and endothelial cell densities of UT-DSAEK tissues were obtained from optical coherence tomography and specular microscopy, respectively, and compared between groups. Corneal perforation rates during the eye bank preparation and postoperative reports of transplanted UT-DSAEK tissues were also compared. Over a 15-month period, 342 UT-DSAEK tissues were prepared: 248 via SP and 94 with DP technique. Mean donor corneal central thickness was 610 ± 58 µm with SP and 790 ± 100 µm with DP technique. Mean central thickness of UT-DSAEK tissues was not statistically different between the groups (84.8 ± 11.0 µm with SP and 85.1 ± 10.5 µm with DP technique, P = 0.857). Mean increase of UT-DSAEK thickness from central to pericentral and peripheral cornea was not significantly different with both techniques. Mean differences between thicknesses of 2 pericentral locations and between those of 2 peripheral locations were not statistically different in the study groups. Corneal perforation of 1.6 and 1.1% occurred in SP and DP groups, respectively. Failed graft was reported 6 months postoperatively in 4 (1.6%) cases with SP and in 1 (1.1%) case with DP technique. Preoperative thickness profiles of UT-DSAEK tissues prepared from donated whole eyes via SP technique were not significantly different from those prepared with DP, showing a symmetric increase of thickness towards peripheral locations.
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Affiliation(s)
- Mozhgan Rezaei Kanavi
- Ocular Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | | | - Bahareh Kheiri
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Javadi
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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35
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Nomogram to Predict Graft Thickness in Descemet Stripping Automated Endothelial Keratoplasty: An Eye Bank Study. Cornea 2018; 37:687-690. [DOI: 10.1097/ico.0000000000001524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Javadi MA, Feizi S, Jafari R, Hosseini SB, Safapour S. Factors Influencing Graft Endothelial Cell Density after Descemet Stripping Automated Endothelial Keratoplasty. J Ophthalmic Vis Res 2018; 13:10-16. [PMID: 29403583 PMCID: PMC5782449 DOI: 10.4103/jovr.jovr_213_16] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Purpose: To determine the factors that influence the endothelial cell density (ECD) of donor grafts after Descemet stripping automated endothelial keratoplasty (DSAEK). Methods: This retrospective, interventional case series comprised 77 eyes of 64 patients who underwent DSAEK. Confocal microscopy was performed at the final follow-up examination to evaluate the endothelial cell count, cell morphology, and graft thickness. Univariate and multiple linear regression analyses were used to investigate recipient-, donor-, surgical-, and postoperative related variables capable of influencing graft endothelial cell counts after DSAEK. Results: The mean patient age was 62.3 ± 15.6 years; patients were followed-up for 26.2 ± 20.9 months postoperatively. Forty-six eyes (59.7%) underwent stand-alone DSAEK; 31 eyes (40.3%) underwent DSAEK combined with cataract surgery. The donor trephination size was 8.0 ± 0.21 mm. The mean donor age was 30.4 ± 11.2 years, and the mean preoperative endothelial cell density was 3127.4 ± 315.1 cells/mm2, which decreased to 1788.6 ± 716.5 cells/mm2 postoperatively (P < 0.001). The mean postoperative central graft thickness was 102.4 ± 31.6 μm. Univariate analysis revealed that postoperative ECD was significantly associated with death to preservation time (P = 0.046), graft thickness (P = 0.016), follow-up duration (P = 0.005), and graft non-attachment (P = 0.049). Multiple regression analyses identified graft thickness (β = 10.62, P = 0.003) and follow-up duration (β = -22.09, P = 0.001) as the significant characteristics influencing postoperative ECD. Conclusion: The primary predictors of ECD after DSAEK were graft thickness and duration of follow-up. Surgeons’ requests for ultrathin DSAEK donor grafts to improve visual outcomes might not have the desired postoperative outcome with respect to ECD.
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Affiliation(s)
- Mohammad Ali Javadi
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sepehr Feizi
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Ocular Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Ophthalmology, Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Roya Jafari
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Sharareh Safapour
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Affiliation(s)
| | - Pankaj Gupta
- University Hospitals Eye Institute and Department of Ophthalmology and Visual Sciences, Case Western Reserve University, Cleveland, Ohio 44106;,
| | - Jonathan Lass
- University Hospitals Eye Institute and Department of Ophthalmology and Visual Sciences, Case Western Reserve University, Cleveland, Ohio 44106;,
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Air Pump-Assisted Graft Centration, Graft Edge Unfolding, and Graft Uncreasing in Young Donor Graft Pre-Descemet Endothelial Keratoplasty. Cornea 2017; 36:1009-1013. [PMID: 28481833 DOI: 10.1097/ico.0000000000001225] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To assess an air pump-assisted technique for graft centration, graft edge unfolding, and graft uncreasing while performing pre-Descemet endothelial keratoplasty (PDEK) using young donor grafts. METHODS Continuous pressurized air infusion was used for graft centration, graft edge unfolding, and graft unwrinkling. RESULTS Ten eyes of 10 patients underwent PDEK with donors aged below 40 years. In all eyes, the donor scrolled into tight scrolls. In all cases, the air pump-assisted technique was effective in positioning and centering the graft accurately and in straightening infolded graft edges and smoothing out graft creases and wrinkles. Endothelial cell loss was 38.6%. Postoperative best-corrected visual acuity at 6 months was 0.66 ± 0.25 in decimal equivalent. Continuous pressurized air infusion acted as a third hand providing a continuous pressure head that supported the graft and prevented graft dislocation as well as anterior chamber collapse during intraocular maneuvering. Adequate maneuvering space was available in all cases, and bleeding, if any, was tamponaded successfully in all cases. CONCLUSIONS Although very young donor grafts may be used for PDEK, they are difficult to center and unroll completely before floating against host stroma. An air pump-assisted technique using continuous pressurized air infusion allows successful final graft positioning even with very young donor corneas. It thus makes surgery easier as several key steps are made easier to handle. It additionally helps in tamponading hemorrhage during peripheral iridectomy, increasing surgical space, preventing fluctuations in the anterior chamber depth, and promoting graft adherence.
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Scanning Electron Microscope Analysis of Stromal Surface Regularity in DSAEK Using Manual or Automated Microkeratomes or DMEK. Cornea 2017; 36:588-593. [DOI: 10.1097/ico.0000000000001135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Nielsen E, Ivarsen A, Kristensen S, Hjortdal J. Fuchs' endothelial corneal dystrophy: a controlled prospective study on visual recovery after endothelial keratoplasty. Acta Ophthalmol 2016; 94:780-787. [PMID: 27273977 DOI: 10.1111/aos.13126] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 04/14/2016] [Indexed: 11/28/2022]
Abstract
PURPOSE To investigate the determining factors of vision and subjective outcome after Descemet's stripping automated endothelial keratoplasty (DSAEK) for Fuchs' endothelial dystrophy (FECD). METHODS In a prospective study, 41 FECD patients who received DSAEK were compared to 40 cataract patients with normal corneas who received cataract surgery (control group). Subjects were recruited between March 2013 and July 2014. Observational procedures included the following: best-corrected visual acuity (BCVA), contrast sensitivity (CS), Catquest-9SF questionnaire, Scheimpflug tomography and anterior OCT. Examinations were carried out before surgery and at 3-, 6- and 12-month follow-up. Main outcome measures were associations between corneal optics and visual parameters, as well as subjective improvement (Catquest-9SF effect size) RESULTS: Best-corrected visual acuity (BCVA) negatively correlated with anterior higher-order aberrations (HOA's) (p < 0.001) and central corneal thickness (p = 0.001). Contrast sensitivity (CS) was negatively correlated with anterior HOA's (p = 0.002) and positively correlated with posterior densitometry (p = 0.008). Catquest-9SF effect size was 1.32 (CI: 1.0-1.6) in the control group, 1.84 (CI: 1.4-2.3) in FECD patients who received phacoemulsification and intra-ocular lens implantation in combination with DSAEK (n = 26) and 1.37 (CI: 0.6-2.1) in pseudophakic FECD patients who received DSAEK (n = 15). CONCLUSIONS DSAEK surgery leads to considerable improvement in patient-reported outcome in FECD patients. There was a strong correlation between anterior HOA's and vision after DSAEK, suggesting that anterior corneal pathology constitutes the major limitation for visual recovery after DSAEK.
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Affiliation(s)
- Esben Nielsen
- Department of Ophthalmology; Aarhus University Hospital; Aarhus Denmark
| | - Anders Ivarsen
- Department of Ophthalmology; Aarhus University Hospital; Aarhus Denmark
| | - Simon Kristensen
- Department of Public Health; Aarhus University Hospital; Aarhus Denmark
| | - Jesper Hjortdal
- Department of Ophthalmology; Aarhus University Hospital; Aarhus Denmark
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Dickman MM, Kruit PJ, Remeijer L, van Rooij J, Van der Lelij A, Wijdh RH, van den Biggelaar FJ, Berendschot TT, Nuijts RM. A Randomized Multicenter Clinical Trial of Ultrathin Descemet Stripping Automated Endothelial Keratoplasty (DSAEK) versus DSAEK. Ophthalmology 2016; 123:2276-2284. [DOI: 10.1016/j.ophtha.2016.07.036] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 07/23/2016] [Accepted: 07/25/2016] [Indexed: 11/25/2022] Open
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Long-term Clinical Outcome After Descemet Membrane Endothelial Keratoplasty. Am J Ophthalmol 2016; 169:218-226. [PMID: 27423793 DOI: 10.1016/j.ajo.2016.07.002] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/25/2016] [Accepted: 07/02/2016] [Indexed: 11/23/2022]
Abstract
PURPOSE To evaluate the long-term clinical outcome up to 5 years after Descemet membrane endothelial keratoplasty (DMEK). DESIGN Retrospective, consecutive case series. METHODS In this single-center study, 310 consecutive DMEK operations for endothelial decompensation were reviewed; 97 eyes of 84 patients met the inclusion criterion of a minimum 3-year follow-up. Retrospective evaluation of clinical examinations occurred at 1 and 3 months and annually up to 5 years after DMEK at the Department of Ophthalmology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen (FAU), Germany. Main outcome measures were corrected distance visual acuity (CDVA), endothelial cell density (ECD), central corneal thickness (CCT), and graft survival (Kaplan-Meier analysis). RESULTS Mean follow-up was 53 ± 13 months. CDVA improved from 0.62 ± 0.42 logMAR before DMEK to 0.13 ± 0.12 logMAR (P < .001); 57% of eyes without ocular comorbidities reached ≥20/25 at 5 years after DMEK. ECD was stable after the initial postsurgical decrease (42% at 1 month, 44% at 5 years), from 2602 ± 243 cells/mm(2) before DMEK to 1460 ± 179 cells/mm(2) at 5 years. CCT decreased from 644 ± 67 μm before DMEK to 557 ± 49 μm at 5 years, with a minimum (530 ± 54 μm) at 3 months. Cumulative probability of 5-year graft survival was 95%. CONCLUSIONS The long-term sustainability of DMEK was confirmed. DMEK not only provides fast visual rehabilitation but maintains its clinical outcome within a follow-up of 5 years. Visual acuity and endothelial cell loss remain stable between 3 months and 5 years after DMEK.
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Dua HS, Termote K, Kenawy MB, Said DG, Jayaswal R, Nubile M, Mastropasqua L, Holland S. Scrolling Characteristics of Pre-Descemet Endothelial Keratoplasty Tissue: An Ex Vivo Study. Am J Ophthalmol 2016; 166:84-90. [PMID: 27038891 DOI: 10.1016/j.ajo.2016.03.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 03/18/2016] [Accepted: 03/23/2016] [Indexed: 11/24/2022]
Abstract
PURPOSE To evaluate the scrolling propensity of pre-Descemet endothelial keratoplasty (PDEK) tissue and to compare it with each component of the PDEK tissue, namely the pre-Descemet layer (Dua's layer [PDL]) and the Descemet membrane (DM). DESIGN Experimental laboratory investigation. METHODS Fourteen human donor sclerocorneal discs in which a type 1 big bubble was obtained by stromal injection of air were studied. The wall of the type 1 big bubble was excised and its grade of scrolling noted. The components of the wall (ie, the DM and PDL) were then separated and the scrolling of each was individually graded. Statistical comparison of the grade of scrolling of each layer and correlation with age was carried out; 25-μm slices of anterior and posterior stroma obtained with the femtosecond laser from 4 control samples were used for comparison. The main outcome measure was the grade of scrolling of PDEK tissue in comparison with PDL and DM. RESULTS Mean donor age was 67 years. The mean grade of the scroll formed by PDEK tissue was1.6 compared to 0.64 for PDL alone and 3.6 for DM alone. The difference was statistically significant. No correlation between donor age and degree of scrolling for any of the tissues tested was found. CONCLUSION PDEK tissue scrolls less than DM. PDL scrolls the least. This demonstrates that PDL tissue splints the DM and reduces its scrolling in PDEK. This feature has relevance to tissue preparation, handling, and unscrolling in the eye during endothelial keratoplasty.
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Abstract
Fuchs endothelial corneal dystrophy (FECD) is the most common corneal dystrophy and frequently results in vision loss. Hallmarks of the disease include loss of corneal endothelial cells and formation of excrescences of Descemet's membrane. Later stages involve all layers of the cornea. Impairment of endothelial barrier and pump function and cell death from oxidative and unfolded protein stress contribute to disease progression. The genetic basis of FECD includes numerous genes and chromosomal loci, although alterations in the transcription factor 4 gene are associated with the majority of cases. Definitive treatment of FECD is corneal transplantation. In this paper, we highlight advances that have been made in understanding FECD's clinical features, pathophysiology, and genetics. We also discuss recent advances in endothelial keratoplasty and potential future treatments.
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Affiliation(s)
- Gustavo Vedana
- Wilmer Eye Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | | | - Albert S Jun
- Wilmer Eye Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA
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Bachmann B, Schaub F, Cursiefen C. [Treatment of corneal endothelial disorders by DMEK and UT-DSAEK. Indications, complications, results and follow-up]. Ophthalmologe 2016; 113:196-203. [PMID: 26868828 DOI: 10.1007/s00347-016-0221-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Various techniques for posterior lamellar keratoplasty have been established for the clinical routine and continuously improved during the last 15 years so that an extremely rapid recovery of vision is possible due to very thin transplants. Descemet membrane endothelial keratoplasty (DMEK) is the method of choice for simple corneal endothelial diseases and has already been applied in complex conditions of the anterior segment. The learning curve for DMEK is comparatively long and the risk of complications in complex anterior segment pathologies is higher than in Descemet's stripping automated endothelial keratoplasty (DSAEK); however, DMEK results in better visual outcome and less graft rejections than DSAEK. The latest evolution in posterior lamellar transplant surgery is ultrathin DSAEK (UT-DSAEK), where the grafted lamella is much thinner than in conventional DSAEK. Currently available data suggest that the resulting visual acuity after UT-DSAEK is close to the visual acuity seen after DMEK; however, studies comparing the results after DMEK and UT-DSAEK are so far lacking. Whether the transplantation of these very thin DSAEK grafts also results in endothelial cell densities and graft rejection rates comparable to DMEK has to be proven.
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Affiliation(s)
- B Bachmann
- Zentrum für Augenheilkunde, Universität zu Köln, Kerpenerstr. 62, 50937, Köln, Deutschland.
| | - F Schaub
- Zentrum für Augenheilkunde, Universität zu Köln, Kerpenerstr. 62, 50937, Köln, Deutschland
| | - C Cursiefen
- Zentrum für Augenheilkunde, Universität zu Köln, Kerpenerstr. 62, 50937, Köln, Deutschland
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Bonissent A, Vabres B, Orignac I, Martin E, Libeau L, Heymann D, Ducourneau Y, Weber M. Greffe lamellaire endothéliale assistée au laser Excimer (ExALEK) : technique et résultats. J Fr Ophtalmol 2016; 39:178-86. [DOI: 10.1016/j.jfo.2015.04.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 04/20/2015] [Accepted: 04/29/2015] [Indexed: 11/26/2022]
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Yong KL, Nguyen HV, Cajucom-Uy HY, Foo V, Tan D, Finkelstein EA, Mehta JS. Cost Minimization Analysis of Precut Cornea Grafts in Descemet Stripping Automated Endothelial Keratoplasty. Medicine (Baltimore) 2016; 95:e2887. [PMID: 26937927 PMCID: PMC4779024 DOI: 10.1097/md.0000000000002887] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 12/30/2015] [Accepted: 02/01/2016] [Indexed: 11/25/2022] Open
Abstract
Descemet stripping automated endothelial keratoplasty (DSAEK) is the most common corneal transplant procedure. A key step in the procedure is preparing the donor cornea for transplantation. This can be accomplished via 1 of 3 alternatives: surgeon cuts the cornea on the day of surgery, the cornea is precut ahead of time in an offsite facility by a trained technician, or a precut cornea is purchased from an eye bank. Currently, there is little evidence on the costs and effectiveness of these 3 strategies to allow healthcare providers decide upon the preferred method to prepare grafts.The aim of this study was to compare the costs and relative effectiveness of each strategy.The Singapore National Eye Centre and Singapore Eye Bank performed both precut cornea and surgeon-cut cornea transplant services between 2009 and 2013.This study included 110 subjects who received precut cornea and 140 who received surgeon-cut cornea. Clinical outcomes and surgical duration were compared across the strategies using the propensity score matching. The cost of each strategy was estimated using the microcosting and consisted of facility costs and procedural costs including surgical duration. One-way sensitivity analysis and threshold analysis were performed.The cost for DSAEK was highest for the surgeon-cut approach ($13,965 per procedure), followed by purchasing precut corneas ($12,659) and then setting up precutting ($12,421). The higher procedural cost of the surgeon-cut approach was largely due to the longer duration of the procedure (surgeon-cut = 72.54 minutes, precut = 59.45 minutes, P < 0.001) and the higher surgeon fees. There was no evidence of differences in clinical outcomes between grafts that were precut or surgeon-cut. Threshold analysis demonstrated that if the number of cases was below 31 a year, the strategy that yielded the lowest cost was purchasing precut cornea from eye bank. If there were more than 290 cases annually, the cheapest option would be to setup precutting facility.Our findings suggest that it is more efficient for centers that are performing a large number of cornea transplants (more than 290 cases) to set up their own facility to conduct precutting.
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Affiliation(s)
- Kai-Ling Yong
- From the Singapore National Eye Centre (K-LY, HYC-U, DT, JSM); Singapore Eye Research Institute (K-LY, HYC-U, DT, JSM); Duke-NUS Graduate Medical School (HVN, EAF, JSM); Yong Loo Lin Medical School, National University of Singapore (VF); and Department of Ophthalmology, National University Health System, Singapore (DT, JSM)
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Yin J, Veldman PB. Endothelial Keratoplasty: Descemet's Stripping Automated Endothelial Keratoplasty Versus Descemet's Membrane Endothelial Keratoplasty. Int Ophthalmol Clin 2016; 56:167-183. [PMID: 27257730 DOI: 10.1097/iio.0000000000000118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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McCabe KL, Kunzevitzky NJ, Chiswell BP, Xia X, Goldberg JL, Lanza R. Efficient Generation of Human Embryonic Stem Cell-Derived Corneal Endothelial Cells by Directed Differentiation. PLoS One 2015; 10:e0145266. [PMID: 26689688 PMCID: PMC4686926 DOI: 10.1371/journal.pone.0145266] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 11/30/2015] [Indexed: 12/13/2022] Open
Abstract
Aim To generate human embryonic stem cell derived corneal endothelial cells (hESC-CECs) for transplantation in patients with corneal endothelial dystrophies. Materials and Methods Feeder-free hESC-CECs were generated by a directed differentiation protocol. hESC-CECs were characterized by morphology, expression of corneal endothelial markers, and microarray analysis of gene expression. Results hESC-CECs were nearly identical morphologically to primary human corneal endothelial cells, expressed Zona Occludens 1 (ZO-1) and Na+/K+ATPaseα1 (ATPA1) on the apical surface in monolayer culture, and produced the key proteins of Descemet’s membrane, Collagen VIIIα1 and VIIIα2 (COL8A1 and 8A2). Quantitative PCR analysis revealed expression of all corneal endothelial pump transcripts. hESC-CECs were 96% similar to primary human adult CECs by microarray analysis. Conclusion hESC-CECs are morphologically similar, express corneal endothelial cell markers and express a nearly identical complement of genes compared to human adult corneal endothelial cells. hESC-CECs may be a suitable alternative to donor-derived corneal endothelium.
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Affiliation(s)
- Kathryn L. McCabe
- Ocata Therapeutics, Marlborough, MA, 01752, United States of America
| | - Noelia J. Kunzevitzky
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL, 33136, United States of America
- Emmecell, Key Biscayne, FL, 33149, United States of America
- Shiley Eye Institute, University of California San Diego, La Jolla, CA, 92093, United States of America
| | - Brian P. Chiswell
- Ocata Therapeutics, Marlborough, MA, 01752, United States of America
| | - Xin Xia
- Shiley Eye Institute, University of California San Diego, La Jolla, CA, 92093, United States of America
| | - Jeffrey L. Goldberg
- Bascom Palmer Eye Institute, University of Miami School of Medicine, Miami, FL, 33136, United States of America
- Shiley Eye Institute, University of California San Diego, La Jolla, CA, 92093, United States of America
- Byers Eye Institute, Stanford University School of Medicine, Palo Alto, CA, 94303, United States of America
| | - Robert Lanza
- Ocata Therapeutics, Marlborough, MA, 01752, United States of America
- * E-mail:
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