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Development and clinical assessment of an artificial cornea

Identifieur interne : 002476 ( Istex/Corpus ); précédent : 002475; suivant : 002477

Development and clinical assessment of an artificial cornea

Auteurs : C. Hicks ; G. Crawford ; T. Chirila ; S. Wiffen ; S. Vijayasekaran ; X. Lou ; J. Fitton ; M. Maley ; A. Clayton ; P. Dalton ; S. Platten ; B. Ziegelaar ; Y. Hong ; A. Russo ; I. Constable

Source :

RBID : ISTEX:AADC67DF27B481E3B03C0F04BF88D69A7E511A50

Abstract

Keratoprosthesis research has been a gradual, rather fragmentary process with advances being made by isolated groups of researchers. This has arisen partly because of poor funding in the area; research groups which have achieved commercial support have often had constraints upon the full disclosure of their findings. Despite these difficulties there has been real progress over the last decade by several independent groups. This article concentrates upon our own development of a hydrogel core-and-skirt keratoprosthesis, the Chirila KPro, in order to illustrate the scientific and clinical problems common to keratoprosthesis research. Pilot data from a clinical trial is presented and the priorities for future research are discussed.

Url:
DOI: 10.1016/S1350-9462(99)00013-0

Links to Exploration step

ISTEX:AADC67DF27B481E3B03C0F04BF88D69A7E511A50

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<div type="abstract" xml:lang="en">Keratoprosthesis research has been a gradual, rather fragmentary process with advances being made by isolated groups of researchers. This has arisen partly because of poor funding in the area; research groups which have achieved commercial support have often had constraints upon the full disclosure of their findings. Despite these difficulties there has been real progress over the last decade by several independent groups. This article concentrates upon our own development of a hydrogel core-and-skirt keratoprosthesis, the Chirila KPro, in order to illustrate the scientific and clinical problems common to keratoprosthesis research. Pilot data from a clinical trial is presented and the priorities for future research are discussed.</div>
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<note type="content">Fig. 1: Type I Chirila KPro in a rabbit, 2.5 years after implantation.</note>
<note type="content">Fig. 2: Light micrograph of skirt region of a KPro explanted from a rabbit cornea, demonstrating fibroblastic biocolonisation.</note>
<note type="content">Fig. 3: Graph showing collagenase production in association with implantation of PHEMA sponges in rabbit corneas treated in vivo with a selection of anticollagenase drugs.</note>
<note type="content">Fig. 4: Graph showing the percentage of dead cells within PHEMA implants over time.</note>
<note type="content">Fig. 5: Diagram of Type I Chirila KPro.</note>
<note type="content">Fig. 6: Diagram showing method of implantation of Type I KPro.</note>
<note type="content">Fig. 7: Diagram of Type II Chirila KPro.</note>
<note type="content">Fig. 8: Diagrams of method of implantation of Type II Chirila KPro. (a) Scleral incision, (b) Pocket formation, (c) Trephination of posterior lamellar of cornea. (d) Positioning of KPro and suturing scleral incision.</note>
<note type="content">Fig. 9: MRI showing Type I KPro after implantation.</note>
<note type="content">Fig. 10: Patient 1 before KPro surgery.</note>
<note type="content">Fig. 11: Patient 1 one month after KPro implantation, prior to opening of conjunctival flap.</note>
<note type="content">Fig. 12: Opening the conjunctival flap in patient 1.</note>
<note type="content">Fig. 13: Patient 1 one week after flap opening.</note>
<note type="content">Fig. 14: Patient 1: visual field after flap opening, showing glaucomatous hemifield.</note>
<note type="content">Fig. 15: Patient 1 showing appearance after KPro-graft exchange.</note>
<note type="content">Fig. 16: Patient 7 showing (a) initial opening in conjunctival flap over Type II KPro (b) final appearance after secondary enlargement of conjunctival opening.</note>
<note type="content">Table 1: Summary of first 7 cases in Chirila PHEMA KPro trial</note>
<note type="content">Table 2: Summary of complications in trial of Chirila PHEMA KPro (Type I and Type II): preliminary data to July 1999</note>
<note type="content">Table 3: Type I Chirila KPro outcomes</note>
<note type="content">Table 4: Type II Chirila KPro outcomes: preliminary data to July 1999</note>
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<affiliation>Lions Eye Institute, 2 Verdun Street, Nedlands, Western Australia 6009, Australia</affiliation>
<affiliation>Centre for Ophthalmology and Visual Science, University of Western Australia, Australia</affiliation>
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<namePart type="family">Russo</namePart>
<affiliation>Lions Eye Institute, 2 Verdun Street, Nedlands, Western Australia 6009, Australia</affiliation>
<affiliation>Centre for Ophthalmology and Visual Science, University of Western Australia, Australia</affiliation>
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<affiliation>Lions Eye Institute, 2 Verdun Street, Nedlands, Western Australia 6009, Australia</affiliation>
<affiliation>Centre for Ophthalmology and Visual Science, University of Western Australia, Australia</affiliation>
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<abstract lang="en">Keratoprosthesis research has been a gradual, rather fragmentary process with advances being made by isolated groups of researchers. This has arisen partly because of poor funding in the area; research groups which have achieved commercial support have often had constraints upon the full disclosure of their findings. Despite these difficulties there has been real progress over the last decade by several independent groups. This article concentrates upon our own development of a hydrogel core-and-skirt keratoprosthesis, the Chirila KPro, in order to illustrate the scientific and clinical problems common to keratoprosthesis research. Pilot data from a clinical trial is presented and the priorities for future research are discussed.</abstract>
<note type="content">Fig. 1: Type I Chirila KPro in a rabbit, 2.5 years after implantation.</note>
<note type="content">Fig. 2: Light micrograph of skirt region of a KPro explanted from a rabbit cornea, demonstrating fibroblastic biocolonisation.</note>
<note type="content">Fig. 3: Graph showing collagenase production in association with implantation of PHEMA sponges in rabbit corneas treated in vivo with a selection of anticollagenase drugs.</note>
<note type="content">Fig. 4: Graph showing the percentage of dead cells within PHEMA implants over time.</note>
<note type="content">Fig. 5: Diagram of Type I Chirila KPro.</note>
<note type="content">Fig. 6: Diagram showing method of implantation of Type I KPro.</note>
<note type="content">Fig. 7: Diagram of Type II Chirila KPro.</note>
<note type="content">Fig. 8: Diagrams of method of implantation of Type II Chirila KPro. (a) Scleral incision, (b) Pocket formation, (c) Trephination of posterior lamellar of cornea. (d) Positioning of KPro and suturing scleral incision.</note>
<note type="content">Fig. 9: MRI showing Type I KPro after implantation.</note>
<note type="content">Fig. 10: Patient 1 before KPro surgery.</note>
<note type="content">Fig. 11: Patient 1 one month after KPro implantation, prior to opening of conjunctival flap.</note>
<note type="content">Fig. 12: Opening the conjunctival flap in patient 1.</note>
<note type="content">Fig. 13: Patient 1 one week after flap opening.</note>
<note type="content">Fig. 14: Patient 1: visual field after flap opening, showing glaucomatous hemifield.</note>
<note type="content">Fig. 15: Patient 1 showing appearance after KPro-graft exchange.</note>
<note type="content">Fig. 16: Patient 7 showing (a) initial opening in conjunctival flap over Type II KPro (b) final appearance after secondary enlargement of conjunctival opening.</note>
<note type="content">Table 1: Summary of first 7 cases in Chirila PHEMA KPro trial</note>
<note type="content">Table 2: Summary of complications in trial of Chirila PHEMA KPro (Type I and Type II): preliminary data to July 1999</note>
<note type="content">Table 3: Type I Chirila KPro outcomes</note>
<note type="content">Table 4: Type II Chirila KPro outcomes: preliminary data to July 1999</note>
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<title>Progress in Retinal and Eye Research</title>
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<title>JPRR</title>
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<dateIssued encoding="w3cdtf">200003</dateIssued>
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<identifier type="ISSN">1350-9462</identifier>
<identifier type="PII">S1350-9462(00)X0019-5</identifier>
<part>
<date>200003</date>
<detail type="volume">
<number>19</number>
<caption>vol.</caption>
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<detail type="issue">
<number>2</number>
<caption>no.</caption>
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<extent unit="issue pages">
<start>131</start>
<end>256</end>
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<extent unit="pages">
<start>149</start>
<end>170</end>
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<identifier type="istex">AADC67DF27B481E3B03C0F04BF88D69A7E511A50</identifier>
<identifier type="DOI">10.1016/S1350-9462(99)00013-0</identifier>
<identifier type="PII">S1350-9462(99)00013-0</identifier>
<accessCondition type="use and reproduction" contentType="">© 2000Elsevier Science Ltd</accessCondition>
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