Efficacy of the Canabrava Ring (pupil expansion device) in cataract surgery for
            eyes with small pupils: the first 30 cases

Canabrava, Sérgio; Rezende, Pedro Henriques; Eliazar, Glauber Coutinho; Figueiredo, Sophia Barbosa de; Resende, Arthur; Batista, Wagner Duarte; Diniz-Filho, Alberto

doi:10.5935/0004-2749.20180042

Cited by 7 publications

(3 citation statements)

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“…Excessive postoperative pupil size is undesirable, leading to glare and negative dysphotopsias. [ 10 19 ]…”

Section: Discussionmentioning

confidence: 99%

“…Numerous pharmacologic[ 1 4 14 15 16 17 ] and mechanical[ 18 19 20 21 22 23 24 25 26 ] strategies have been developed to increase pupil size and optimize surgical visualization. Pupil expansion devices (PEDs) such as iris hooks and the Malyugin ring (MST, Seattle, WA) are innovative solutions for controlling intraoperative pupil size.…”

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confidence: 99%

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Efficacy of a hinged pupil expansion device in small pupil cataract surgery

Cruz

Kenyon

2021

Indian J Ophthalmol

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Purpose: To evaluate the efficacy and safety of a hinged pupil expansion device (PED) in eyes with small pupils undergoing phacoemulsification. Methods: In this prospective, multicenter, interventional case series of 57 eyes with suboptimal pharmacologic pupil dilation (<5 mm diameter), a hinged PED (I-Ring, Beaver-Visitec International, Waltham, MA) was applied to facilitate surgical visualization during cataract surgery. The pupil diameters (PD) were measured at different stages of the procedure and at the 1-month follow-up visit. Rate of successful intraoperative PED deployment, pupil size, and shape were assessed. Results: The mean patient age was 70.5 ± 12.1 years. The I-Ring PED was successfully applied in all eyes. The mean PD at various stages were 4.1 ± 1.1 mm (dilation with eye drops only preoperatively), 4.3 ± 1.1 mm (dilation after intracameral epinephrine and ophthalmic viscoelastic device), 6.80 ± 0.00 mm (with PED applied), and 5.7 ± 1.1 mm (end of surgery). A statistically significant difference ( P < 0.001) was observed between the mean PD with intracameral medications and with PED application. Postoperative circular pupil was observed in 54 of 57 eyes (94.7%) and the mean eccentricity index ( n = 57 eyes) was 0.11 ± 0.22. No significant adverse events were observed. Conclusion: The I-Ring PED safely and effectively provided and maintained adequate pupil expansion and surgical visualization in eyes with small pupils undergoing cataract surgery. Postoperatively 95% of eyes attained circular pupils. This hinged PED is an additional instrumentation option for the safe and effective expansion of inadequately sized pupils during cataract surgery.

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“…Excessive postoperative pupil size is undesirable, leading to glare and negative dysphotopsias. [ 10 19 ]…”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Efficacy of a hinged pupil expansion device in small pupil cataract surgery

Cruz

Kenyon

2021

Indian J Ophthalmol

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“…Iris hooks are more cumbersome, tedious, and timeconsuming [8,9]. With the availability of devices like the Malyugin ring, Canabrava ring, Assia pupil expander, B-Hex, I ring, and Iris speculum, among others, the threshold for using pupil augmentation rings has come down [7,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%