Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil
Abstract Purpose To compare 6 methods for intraoperative pupil dilatation in eyes with insufficient pupil size during phacoemulsification. Methods This was a prospective case–control study. 99 microcoria cataract patients (120 eyes) were collected and were divided into 6 groups(20 eyes each group),...
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| Format: | Article |
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BMC
2022-04-01
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| Series: | BMC Ophthalmology |
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| Online Access: | https://doi.org/10.1186/s12886-022-02402-1 |
| _version_ | 1818060490357604352 |
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| author | Jin Da Wang Jing Shang Zhang Meng Li Ying Yan Mao Yusufu Mayinuer Xiu Hua Wan |
| author_facet | Jin Da Wang Jing Shang Zhang Meng Li Ying Yan Mao Yusufu Mayinuer Xiu Hua Wan |
| author_sort | Jin Da Wang |
| collection | DOAJ |
| description | Abstract Purpose To compare 6 methods for intraoperative pupil dilatation in eyes with insufficient pupil size during phacoemulsification. Methods This was a prospective case–control study. 99 microcoria cataract patients (120 eyes) were collected and were divided into 6 groups(20 eyes each group), and their pupils were dilated by bimanual stretching pupil (group I), pupil radial cut open(group II), mechanical pupil dilatation with iris-retractor hooks (group III), OASIS iris expander (group IV), and Malyguin-ring (Microsurgical company, America) (group V), B-HEX Pupil Expander (Med Invent Devics, India)(group VI),respectively. 3.0 mm clear corneal incision were used in phacoemulsification. All cases were followed up at 1 week and 1, 3, 6 months after the surgery. The best corrected visual acuity (BCVA), intraocular pressure(IOP), corneal endothelium cell density(ECD), pupil diameter(PD) of before and after surgery were compared. Results One same doctor finished all cataract surgeries successfully. The eyes’ condition before surgery and at 6 months after surgery were compared. There were no significant statistical differences for the conditions of the eyes before surgery among six groups. The ECDs were better at 6 months postoperatively in group III and V, median values: 2114/mm2, 1961/mm2. PD was largest in group II (median value: 5.5 mm), which was significantly larger than other groups (Padjusted < 0.05). Conclusions All 6 methods used in this study were effective for the mechanical dilatation of small pupils and didn’t affect the postoperative visual acuity and intraocular pressure in microcoria cataract phacoemulsification. Iris-retractor hooks and the Malyugin Ring can reduce intraoperative corneal endothelium cell loss. Postoperative PD is larger when the iris was cut open radially. |
| first_indexed | 2024-12-10T13:33:15Z |
| format | Article |
| id | doaj.art-2590683647504866906872505e21f6ef |
| institution | Directory Open Access Journal |
| issn | 1471-2415 |
| language | English |
| last_indexed | 2024-12-10T13:33:15Z |
| publishDate | 2022-04-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Ophthalmology |
| spelling | doaj.art-2590683647504866906872505e21f6ef2022-12-22T01:46:53ZengBMCBMC Ophthalmology1471-24152022-04-012211610.1186/s12886-022-02402-1Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupilJin Da Wang0Jing Shang Zhang1Meng Li2Ying Yan Mao3Yusufu Mayinuer4Xiu Hua Wan5Beijing Tongren Eye Center, Beijing Tongren Hospital of Capital Medical University, Beijing Key Laboratory of Ophthalmology and Visual SciencesBeijing Tongren Eye Center, Beijing Tongren Hospital of Capital Medical University, Beijing Key Laboratory of Ophthalmology and Visual SciencesBeijing Tongren Eye Center, Beijing Tongren Hospital of Capital Medical University, Beijing Key Laboratory of Ophthalmology and Visual SciencesBeijing Tongren Eye Center, Beijing Tongren Hospital of Capital Medical University, Beijing Key Laboratory of Ophthalmology and Visual SciencesBeijing Tongren Eye Center, Beijing Tongren Hospital of Capital Medical University, Beijing Key Laboratory of Ophthalmology and Visual SciencesBeijing Tongren Eye Center, Beijing Tongren Hospital of Capital Medical University, Beijing Key Laboratory of Ophthalmology and Visual SciencesAbstract Purpose To compare 6 methods for intraoperative pupil dilatation in eyes with insufficient pupil size during phacoemulsification. Methods This was a prospective case–control study. 99 microcoria cataract patients (120 eyes) were collected and were divided into 6 groups(20 eyes each group), and their pupils were dilated by bimanual stretching pupil (group I), pupil radial cut open(group II), mechanical pupil dilatation with iris-retractor hooks (group III), OASIS iris expander (group IV), and Malyguin-ring (Microsurgical company, America) (group V), B-HEX Pupil Expander (Med Invent Devics, India)(group VI),respectively. 3.0 mm clear corneal incision were used in phacoemulsification. All cases were followed up at 1 week and 1, 3, 6 months after the surgery. The best corrected visual acuity (BCVA), intraocular pressure(IOP), corneal endothelium cell density(ECD), pupil diameter(PD) of before and after surgery were compared. Results One same doctor finished all cataract surgeries successfully. The eyes’ condition before surgery and at 6 months after surgery were compared. There were no significant statistical differences for the conditions of the eyes before surgery among six groups. The ECDs were better at 6 months postoperatively in group III and V, median values: 2114/mm2, 1961/mm2. PD was largest in group II (median value: 5.5 mm), which was significantly larger than other groups (Padjusted < 0.05). Conclusions All 6 methods used in this study were effective for the mechanical dilatation of small pupils and didn’t affect the postoperative visual acuity and intraocular pressure in microcoria cataract phacoemulsification. Iris-retractor hooks and the Malyugin Ring can reduce intraoperative corneal endothelium cell loss. Postoperative PD is larger when the iris was cut open radially.https://doi.org/10.1186/s12886-022-02402-1CataractPhacoemulsificationSmall pupilPupil dilatationPupil expander |
| spellingShingle | Jin Da Wang Jing Shang Zhang Meng Li Ying Yan Mao Yusufu Mayinuer Xiu Hua Wan Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil BMC Ophthalmology Cataract Phacoemulsification Small pupil Pupil dilatation Pupil expander |
| title | Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil |
| title_full | Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil |
| title_fullStr | Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil |
| title_full_unstemmed | Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil |
| title_short | Comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil |
| title_sort | comparison of different pupil dilatation methods for phacoemulsification in eyes with a small pupil |
| topic | Cataract Phacoemulsification Small pupil Pupil dilatation Pupil expander |
| url | https://doi.org/10.1186/s12886-022-02402-1 |
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