Capsular Tension Ring and Iris Hook Use in The Management of Cataract with Phacoemulsification Method in Dogs

Year 2024, Volume: 13 Issue: 1, 68 - 75, 25.06.2024

Osman Bulut , Ayşe İpek Akyüz Ünsal , Ali Belge

https://doi.org/10.31196/huvfd.1462824

Abstract

The purpose of this study is to evaluate the surgical outcome of capsular tension ring and iris hook use during phacoemulsification in dogs with zonular weakness and miotic pupils. This study includes nineteen dogs (29 eyes) that underwent phacoemulsification (15 dogs/25 eyes) and extracapsular cataract extraction surgery (4 dogs/4 eyes) between February 2014 and February 2015. Patients with any ophthalmic problem other than cataracts were not included in the study. Some dogs did not achieve pharmacologic pupil dilation. These dogs required the use of iris hooks or the insertion of capsular tension rings. The capsular tension ring insertion was used in dogs with zonular rupture in more than half of the zonules. Capsular tension rings were inserted in cases of zonular dialysis and iris hooks were placed to widen the pupil. Fifteen dogs (25 eyes) underwent phacoemulsification, while 4 (4 eyes) received extracapsular cataract extraction (ECCE) surgery due to the difficulty of phacoemulsification in hypermature cataracts. Iris hooks were used in four dogs (8 eyes) for drug-resistant miotic pupils. Capsular tension rings were inserted to stabilize the lens capsule during phacoemulsification and to centralize the intraocular lens (IOL) in the bag. Capsular tension rings in cases of zonular dialysis and iris hooks in drug-resistant miotic pupils improved the success of cataract operations with phacoemulsification. Both are safe and useful for zonular weakness and for maintaining mydriasis during surgery.

Keywords

Canine, Extracapsular cataract extraction (ECCE), Intraocular lens, Mydriatics, Zonular weakness.

Project Number

VTF15046

Köpeklerde Fakoemülsifikasyon Tekniği ile Katarakt Cerrahisinde Kapsül Germe Halkası ve İris Kancası Kullanımı

Abstract

Bu çalışmanın amacı, miyotik pupilla ve zonuler zayıflığa sahip köpeklerin fakoemülsifikasyon operasyonunda, kapsül germe halkası ve iris kancalarının kullanımının cerrahi sonuçlarını değerlendirmektir. Çalışmanın materyalini, Şubat 2014 ve Şubat 2015 tarihleri arasında, katarakt cerrahisi için fakoemülsifikasyon (15 köpek/25 göz) ve ekstrakapsüler katarakt ekstraksiyonu (EKKE) (4 köpek/4 göz) uygulanan toplam 19 köpek oluşturdu. Katarakt harici başka bir göz hastalığı olanlar çalışmaya dahil edilmedi. Operasyonlar sırasında pupillada miyosis şekillenen bazı köpeklere iris kancaları, zonüler zayıflığı olanlara ise kapsül germe halkası yerleştirildi. Kapsül germe halkaları aynı zamanda lens kapsülü stabil hale getirmek ve intraokuler lensi (İOL) kapsül içinde sentralize etmek için kullanıldı. Miyosis şekillenen toplam 4 köpekte (8 göz) iris kancaları kullanıldı. Fakoemülsifikasyon işlemi ile katarakt ekstrasksiyonu gerçekleşemeyen 4 köpekte EKKE uygulandı. Zonüler zayıflık için kapsül germe halkaları ile pupillar miyosise karşı iris kancaları kullanımının katarakt operasyonlarının başarısını arttırdığı tespit edildi.

Keywords

Ekstrakapsüler katarakt ekstraksiyonu (EKKE), İntraokuler lens, Midriyatiks, Miyosis, Köpek, Zonuler zayıflık

Supporting Institution

Aydın Adnan Menderes University as a scientific research

Project Number

VTF15046

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