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Corneal graft

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https://www.readbyqxmd.com/read/27918355/experienced-dsaek-surgeon-s-transition-to-dmek-outcomes-comparing-the-last-100-dsaek-surgeries-with-the-first-100-dmek-surgeries-exclusively-using-previously-published-techniques
#1
Paul M Phillips, Louis J Phillips, Valliamai Muthappan, Charlene M Maloney, Christopher N Carver
PURPOSE: To compare outcomes of Descemet stripping automated endothelial keratoplasty (DSAEK) and Descemet membrane endothelial keratoplasty (DMEK) when an experienced DSAEK surgeon transitions to DMEK while following 2 published endothelial keratoplasty surgical techniques. METHODS: This is a retrospective review of 200 eyes of 132 patients with Fuchs corneal dystrophy that underwent endothelial keratoplasty performed by one surgeon. Published, standardized techniques were followed for both DSAEK and DMEK...
December 1, 2016: Cornea
https://www.readbyqxmd.com/read/27907157/human-bone-derived-collagen-for-the-development-of-an-artificial-corneal-endothelial-graft-in-vivo-results-in-a-rabbit-model
#2
Natalia Vázquez, Manuel Chacón, Carlos A Rodríguez-Barrientos, Jesús Merayo-Lloves, Miguel Naveiras, Begoña Baamonde, Jose F Alfonso, Iriana Zambrano-Andazol, Ana C Riestra, Álvaro Meana
Corneal keratoplasty (penetrating or lamellar) using cadaveric human tissue, is nowadays the main treatment for corneal endotelial dysfunctions. However, there is a worldwide shortage of donor corneas available for transplantation and about 53% of the world's population have no access to corneal transplantation. Generating a complete cornea by tissue engineering is still a tough goal, but an endothelial lamellar graft might be an easier task. In this study, we developed a tissue engineered corneal endothelium by culturing human corneal endothelial cells on a human purified type I collagen membrane...
2016: PloS One
https://www.readbyqxmd.com/read/27902849/oral-antivirals-for-preventing-recurrent-herpes-simplex-keratitis-in-people-with-corneal-grafts
#3
REVIEW
Uday K Bhatt, M N Abdul Karim, Jeremy I Prydal, Senthil V Maharajan, Usama Fares
BACKGROUND: Ocular herpes is a viral infection of the eye caused by the herpes simplex virus (HSV), a double-stranded DNA virus. Corneal scarring caused by herpes simplex keratitis (HSK) is the leading infectious cause of penetrating corneal graft in high-income countries. Acyclovir is an antiviral drug known to have a protective effect against recurrences in herpetic eye disease. While there are some studies which have evaluated the effects of intervention with oral antiviral in preventing such recurrences in people with corneal grafts, a systematic review of all comparative clinical trials has not been previously undertaken...
November 30, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27895364/a-10-year-review-of-indications-for-penetrating-keratoplasty-in-a-tertiary-care-setting-in-karachi-pakistan
#4
Tanveer Ajum Chaudhry, Salman Naveed Sadiq, Zubaida Sirang, Maheen Akhtar Syed, Mustafa Kamal, Khabir Ahmad
The retrospective study was conducted to determine the indications and outomes of penetrating keratoplasty(PKP) in a tertiary care setting in Pakistan. All eyes that had undergone PKP between January 2005 and December 2014 at the Aga Khan University Hospital, Karachi, were included.Data were collected on the indications of PKP, graft survival (graft clarity at final follow-up), andbest corrected visual acuity (BCVA).Kaplan-Meier\'s method was usedto analyse graft survival.Out of 437 eyes, 383(87%) were for visual purpose...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27891366/evaluation-of-the-central-corneal-thickness-with-anterior-segment-optical-coherence-tomogram-after-penetrating-keratoplasty
#5
Anuradha Raj, Renu Dhasmana, Harsh Bahadur, Ramesh Chander Nagpal
INTRODUCTION: Graft central thickness evaluates the graft quality which affects the outcome of Penetrating Keratoplasty (PK). It varies at different point of time after PK. Anterior Segment Optical Coherence Tomography (ASOCT) can measure graft's central thickness with quite high precision. AIM: The purpose of the study was to monitor the Central Corneal thickness (CCT) with ASOCT after PK and to evaluate its relationship with the pre-operative diagnosis. MATERIALS AND METHODS: This is an observational retrospective study where records of optical PK done in December 2012 and June 2015 were reviewed...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27888184/amnion-assisted-conjunctival-epithelial-redirection-in-limbal-stem-cell-grafting
#6
Harminder S Dua, Ammar Miri, Mohamed S Elalfy, Anna Lencova, Dalia G Said
AIMS: To develop a technique using amniotic membrane (AM) to prevent admixture of conjunctival epithelial cells and limbal explant-derived corneal epithelial cells in patients undergoing limbal stem cell transplantation. To compare this technique with the current method of 'sequential sector conjunctival epitheliectomy' (SSCE). METHODS: 26 patients with total limbal stem cell deficiency who underwent ocular surface reconstruction with limbal stem cells transplantation were retrospectively studied...
November 25, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27885526/twelve-year-follow-up-of-penetrating-keratoplasty
#7
Takashi Ono, Sosuke Ishiyama, Takeshi Hayashidera, Yosai Mori, Ryohei Nejima, Kazunori Miyata, Shiro Amano
PURPOSE: To evaluate the long-term outcomes of penetrating keratoplasty (PKP) according to the corneal disease diagnosis and the number of PKP procedures performed. METHODS: Five-hundred-and-nine eyes from 403 patients who underwent PKP at Miyata Eye Hospital in Japan from 1998 through 2014, were included in this study. Medical charts were retrospectively examined to ascertain the corneal disease diagnosis and the period of graft survival. Graft survival rates were compared among various corneal disease diagnoses and among the number of PKP procedures performed...
November 24, 2016: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/27873063/-a%C3%A2-new-technique-to-facilitate-donor-preparation-for-dmek-surgery
#8
P W Rieck, T Engels
BACKGROUND: Descemet membrane endothelial keratoplasty (DMEK) is becoming more and more the method of choice to treat corneal endothelial diseases in specialized centers. The reasons that prevent this technique from becoming widespread are the delicate donor tissue preparation. By inverting the curvature of the cornea from convex to concave after mounting onto an artificial anterior chamber, we developed a combined manual delamination and hydrodissection technique, which allows a rapid and endothelium-preserving method of separating donor Descemet membranes from the underlying stroma...
November 21, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/27871779/intraocular-pressure-measurement-after-dsaek-by-icare-goldmann-applanation-and-dynamic-contour-tonometry-a-comparative-study
#9
A Achiron, O Blumenfeld, H Avizemer, L Karmona, G Leybowich, V Man, E Bartov, Z Burgansky-Eliash
PURPOSE: Corneal thickness inevitably increases following Descemet's stripping automated endothelial keratoplasty (DSAEK), owing to the addition of a donor graft. The current study compares different devices in assessing post-DSAEK intraocular pressure (IOP). METHODS: We compared IOP values measured by the Goldmann tonometry (GAT), iCare rebound tonometry (iCare) and Pascal dynamic contour tonometry (PDCT) in eyes following DSAEK. Agreement between measurements was calculated with correlation analysis and Bland-Altman plots...
November 18, 2016: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/27863068/scaffold-free-tissue-engineering-of-functional-corneal-stromal-tissue
#10
Fatima N Syed-Picard, Yiqin Du, Andrew J Hertsenberg, Rachelle Palchesko, Martha L Funderburgh, Adam W Feinberg, James L Funderburgh
Blinding corneal scarring is predominately treated with allogeneic graft tissue, however, there is a worldwide shortage of donor tissue leaving millions in need of therapy. Human corneal stromal stem cells (CSSC) have been shown produce corneal tissue when cultured on nanofiber scaffolding, but this tissue cannot be readily separated from the scaffold. In this study, scaffold-free tissue engineering methods were used to generate biomimetic corneal stromal tissue constructs that can be transplanted in vivo without introducing the additional variables associated with exogenous scaffolding...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27861306/enhancing-dmek-success-by-identifying-optimal-levels-of-trypan-blue-dye-application-to-donor-corneal-tissue
#11
Parag A Majmudar, Lauren Johnson
PURPOSE: The purpose of this study was to determine the correct concentration and duration of application of trypan blue dye to Descemet membrane endothelial keratoplasty (DMEK) donor corneal tissue before transplant to enhance visibility while minimizing damage to the tissue. METHODS: Corneas were precut for DMEK using an 8-mm punch, and each was stained with either 0.06% or 0.15% trypan blue for a duration of 1, 3, or 5 minutes. After staining, each tissue was placed in balanced salt solution and observed to determine how quickly the stain faded from the tissue using a grading system...
November 16, 2016: Cornea
https://www.readbyqxmd.com/read/27853018/infectious-pseudomonas-and-bipolaris-scleritis-following-history-of-pterygium-surgery
#12
Ashkan M Abbey, Nisha V Shah, Richard K Forster, Leejee H Suh
We report an interesting case of infectious scleritis from coinfection of Pseudomonas aeruginosa and Bipolaris with no corneal infiltrate. A healthy 60-year-old man with a history of infectious scleritis following pterygium excision presented with purulent material growing P. aeruginosa and 1+ colonies of Bipolaris species of fungus. Broad spectrum treatment was initiated with hourly topical moxifloxacin, fortified tobramycin, and natamycin along with a subconjunctival injection of voriconazole and topical cyclosporine, with PO ketoconazole...
September 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27853009/outcome-of-transplanted-donor-corneas-with-more-than-6-h-of-death-to-preservation-time
#13
Ashik Mohamed, Sunita Chaurasia, Prashant Garg
PURPOSE: In tropical countries, physicians are skeptic in using corneas with death-to-preservation time (DTPT) >6 h, concerns being endothelial cell viability and microbial contamination on prolonged DTPT. The objective of the study was to investigate these concerns by analyzing the outcomes of corneal transplants performed using donor corneas with DTPT >6 h. MATERIALS AND METHODS: The study was a retrospective case series of 65 transplants performed in 2013 with donor corneas that had DTPT >6 h (range, 6...
September 2016: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/27843896/surgical-reconstruction-of-ocular-surface-tumors-using-fibrin-sealant-tissue-adhesive
#14
Aline Roseane Queiroz de Paiva, Larissa Abreu de Azevedo Fraga, Virgínia Laura Lucas Torres
PURPOSE: To evaluate the surgical outcomes of ocular surface reconstruction in corneal-conjunctival tumors using fibrin tissue adhesive. METHODS: A prospective noncomparative study was performed between May 2013 and February 2015. Patients were submitted to routine surgical procedure for corneal-conjunctival tumor excision followed by amniotic membrane graft transplantation using fibrin tissue adhesive (Evicel®, Omrix Biopharmaceuticals Ltd., Israel). Results were assessed on the 1st, 7th, 15th and 30th postoperative days to analyze subjective complaints, adhesiveness and positioning of the graft, potential complications and recurrences...
October 2016: Ocular Oncology and Pathology
https://www.readbyqxmd.com/read/27843236/mycobacterium-chelonae-in-a-tectonic-corneal-graft
#15
Haziq Raees Chowdhury, Oliver Comyn, Gill Jones, Mayank A Nanavaty
Atypical mycobacterial infections of the cornea can present with nonspecific inflammatory changes and graft rejection, with no obvious focus to culture and a subsequent delay to diagnosis. These pathogens are well documented in the literature following laser-assisted in situ keratomileusis but have rarely been described following corneal transplant surgery. We report a single case of Mycobacterium chelonae keratitis 1 year after tectonic keratoplasty.
September 2016: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/27843086/measurement-of-visual-function-among-patients-undergoing-corneal-transplantation-using-the-vf-14-index-in-morocco
#16
S Belghmaidi, L Adarmouch, M Baali, M Sebbani, I Hajji, M Amine, A Moutaouakil
OBJECTIVE: To validate the Moroccan version of the VF-14 in candidates for keratoplasty and to assess their quality of life using this tool before and after transplantation. METHODS: This is a longitudinal prospective study that assessed 57 patients who underwent penetrating keratoplasty, recruited in the ophthalmology service in Marrakech over 5 years. The original VF-14 questionnaire was adapted into Moroccan dialect. The questionnaire was administered before and 2 years after transplantation...
November 11, 2016: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/27837564/preservation-of-ocular-epithelial-limbal-stem-cells-the-new-frontier-in-regenerative-medicine
#17
Zala Lužnik, Marina Bertolin, Claudia Breda, Barbara Ferrari, Vanessa Barbaro, Petra Schollmayer, Stefano Ferrari
Significant advances have been made in the field of ocular regenerative medicine. Promising stem cell-based therapeutic strategies have been translated into the clinical practice over the last few decades. These new stem cell-based therapies offer the possibility of permanently restoring corneal epithelium in patients with severe disabling and blinding ocular surface disease. The European Union has already classified stem cell-based therapies as "medicinal products". Therefore, manipulation is strictly regulated according to the defined conditions of good manufacturing practice, with the production of stem cell therapeutics at only accredited production sites authorized by the national regulatory agencies...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27836829/one-year-outcome-after-descemet-membrane-endothelial-keratoplasty-dmek-comparing-sulfur-hexafluoride-sf6-20-versus-100-air-for-anterior-chamber-tamponade
#18
Friederike Schaub, Philip Enders, Katharina Snijders, Silvia Schrittenlocher, Sebastian Siebelmann, Ludwig M Heindl, Björn O Bachmann, Claus Cursiefen
PURPOSE: To investigate 1-year clinical outcome and complication rates following Descemet membrane endothelial keratoplasty (DMEK) with sulfur hexafluoride 20% (SF620%) anterior chamber tamponade compared with conventionally used 100% air for primary graft attachment during DMEK surgery. METHODS: Records of 1112 consecutive DMEKs were reviewed retrospectively and grouped by anterior chamber tamponade used during DMEK surgery (SF620% vs 100% air). Outcome measures included intraocular pressure (IOP), best spectacle-corrected visual acuity (BSCVA), endothelial cell density (ECD) and central corneal thickness (CCT) at 1, 3, 6 and 12 months after DMEK surgery...
November 11, 2016: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/27830086/active-pedicle-epithelial-flap-transposition-combined-with-amniotic-membrane-transplantation-for-treatment-of-nonhealing-corneal-ulcers
#19
Ting Zhang, Yuexin Wang, Yanni Jia, Dongle Liu, Suxia Li, Weiyun Shi, Hua Gao
Introduction. The objective was to evaluate the efficacy of active pedicle epithelial flap transposition combined with amniotic membrane transplantation (AMT) in treating nonhealing corneal ulcers. Material and Methods. Eleven patients (11 eyes) with nonhealing corneal ulcer who underwent the combined surgery were included. Postoperatively, ulcer healing time was detected by corneal fluorescein staining. Visual acuity, intraocular pressure, surgical complications, and recurrence were recorded. Corneal status was inspected by the laser scanning confocal microscopy and anterior segment optical coherence tomography (AS-OCT)...
2016: Journal of Ophthalmology
https://www.readbyqxmd.com/read/27821789/silver-sulfadiazine-impregnated-hydrocolloid-dressing-is-beneficial-in-split-thickness-skin-graft-donor-wound-healing-in-a-small-randomized-controlled-study
#20
Sadanori Akita, Hiroshi Yoshimoto, Katsuya Tanaka, Masao Oishi, Chikako Senju, Seiji Mawatari, Eisaku Takahara, Sizuka Suzuki, Kenji Hayashida
Donor-site wound healing was tested with a silver sulfadiazine (SSD)-impregnated hydrocolloid dressing and hydrocolloid dressing applied manually by a physician on site. A total of 14 patients, 5 woman and 9 men (23-89 years old, average = 61.6 ± 18.70 years), were enrolled in this prospective controlled study. The degree of bleeding was significantly less with the SSD-impregnated than with the hydrocolloid dressing (P < .01). In the moisture meter analysis, the values of the effective contact coefficient and corneal thickness were significantly smaller with the SSD-impregnated dressing (P < ...
November 6, 2016: International Journal of Lower Extremity Wounds
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