虹彩切除、虹彩切除術

WordNet

an eye operation that treats closed-angle glaucoma by surgical removal of part of the iris of the eye

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/09/02 19:10:09」(JST)

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An iridectomy, also known as a surgical iridectomy or corectomy, is the surgical removal of part of the iris.^[1]^[2] These procedures are most frequently performed in the treatment of closed-angle glaucoma and iris melanoma.^[2]

Comparison with Nd:YAG laser iridotomy[edit source | edit]

In acute angle-closure glaucoma cases, surgical iridectomy has been superseded by Nd:YAG laser iridotomy, because the laser procedure is much safer. Opening the globe for a surgical iridectomy in a patient with high intraocular pressure greatly increases the risk of suprachoroidal hemorrhage, with potential for associated expulsive hemorrhage. Nd:YAG laser iridotomy avoids such a catastrophe by laser created hole in the iris, which facilitates flow of aqueous humor from the posterior to the anterior chamber of the eye.

Current indications[edit source | edit]

Surgical iridectomy is commonly indicated and performed in the following cases:

Cataract surgery in a glaucoma patient
Combined procedure for cataract and glaucoma
Acute closed-angle glaucoma
Posterior capsular tears with vitreous loss
Implantation of anterior chamber IOL.
Vitreoretinal procedure involving injection of silicone oil. The location of the iridectomy in such cases is at 6'O Clock, as opposed to routine iridectomy done at 11 to 1'O Clock. This is because silicone oil is less dense than water.
Iris trauma

Types[edit source | edit]

An antiphogistic iridectomy is the surgical removal of part of the iris to reduce intraocular pressure in inflammatory conditions of the eye.^[1]
A basal iridectomy is an iridectomy which includes the root of the iris.^[1]
An optical iridectomy is the surgical removal of part of the iris to enlarge the existing pupil, or to form an artificial pupil, when the natural pupil is ineffectual.^[1]
A peripheral iridectomy is the surgical removal of a portion of the iris in the region of its root, leaving the pupillary margin and sphincter pupillae muscle intact.^[1] It is used in the treatment of glaucoma.^[2]
A preliminary iridectomy, or preparatory iridectomy, is the surgical removal of part of the iris preceding cataract extraction.^[1] It facilitates the removal of the cataractous lens.^[2]
A sector iridectomy, also known as a complete iridectomy or total iridectomy, is the surgical removal of a complete radial section of the iris extending from the pupillary margin to the root of the iris.^[1] A key-hole pupil is left by the removal of a wedge-shaped section of iris.^[3]
A stenopeic iridectomy is the surgical removal of a narrow slit or a minute portion of the iris, leaving the sphincter pupillae muscle intact.^[1]
A therapeutic iridectomy is the surgical removal of a portion of the iris for the cure or prevention of an ocular disease.^[1]

References[edit source | edit]

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Cline D; Hofstetter HW; Griffin JR. Dictionary of Visual Science. 4th ed. Butterworth-Heinemann, Boston 1997. ISBN 0-7506-9895-0
^ ^a ^b ^c ^d Surgery Encyclopedia - "Iridectomy." Encyclopedia of Surgery: A Guide for Patients and Caregivers. Retrieved May 20, 2006.
^ Cassin, B. and Solomon, S. Dictionary of Eye Terminology. Gainsville, Florida: Triad Publishing Company, 1990.

UpToDate Contents

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1. 閉塞隅角緑内障 angle closure glaucoma

English Journal

Nontuberculous mycobacterial infection after clear corneal phacoemulsification cataract surgery: a report of 13 cases.

Lim Bon Siong R, Felipe AF.Source*Department of Ophthalmology and Visual Sciences, Sentro Oftalmologico Jose Rizal, University of the Philippines Manila, Philippine General Hospital, Manila, Philippines †Institute of Ophthalmology and Visual Sciences, International Eye Institute, St. Luke's Medical Center, Quezon City, Philippines ‡Cornea Service, Wills Eye Institute, Philadelphia, PA.
Cornea.Cornea.2013 May;32(5):625-30. doi: 10.1097/ICO.0b013e31826cf840.
PURPOSE: : To review the patient profile, clinical presentation, management, and outcomes of nontuberculous mycobacterial (NTM) infection after clear corneal phacoemulsification.METHODS: : Review of consecutive cases diagnosed with NTM infection after phacoemulsification from 2004 to 2009. Demograph
PMID 23187167

Repositioning of glaucoma tubes into the pars plana for refractory malignant glaucoma: a case report.

Song J, Castellarin A, Song M, Song A.AbstractINTRODUCTION: Malignant glaucoma occurs when the intraocular pressure elevates in the setting of a shallow anterior chamber and patent iridectomy. We describe a case in which malignant glaucoma that was refractory to conventional treatment and complete vitrectomy was successfully managed by rerouting the glaucoma tubes into the pars plana.
Journal of medical case reports.J Med Case Rep.2013 Apr 11;7(1):102. [Epub ahead of print]
INTRODUCTION: Malignant glaucoma occurs when the intraocular pressure elevates in the setting of a shallow anterior chamber and patent iridectomy. We describe a case in which malignant glaucoma that was refractory to conventional treatment and complete vitrectomy was successfully managed by reroutin
PMID 23577950

[Reliability and safety of intravitreal Ozurdex injections : The ZERO study.]

Schmitz K, Maier M, Clemens CR, Höhn F, Wachtlin J, Lehmann F, Bertelmann T, Rüdiger K, Horn M, Bezatis A, Spital G, Meyer CH; German Retinal Vein Occlusion Group.SourceAugenklinik Franziskushospital Münster, Münster, Deutschland.
Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft.Ophthalmologe.2013 Apr 6. [Epub ahead of print]
BACKGROUND: Since July 2010 Ozurdex® is approved in Germany for treatment of macular edema from retinal vein occlusion (RVO). The objective of this observational study was a systemic summary and analysis of clinical experience regarding complications and side effects of intravitreal administration
PMID 23559321