Incidence of intraoperative floppy iris syndrome in patients on either systemic or topical alpha(1)-adrenoceptor antagonist.

Department of Ophthalmology, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tennidai, Tsukuba, Ibaraki 305-8575, Japan.
American Journal of Ophthalmology (Impact Factor: 4.02). 02/2007; 143(1):150-1. DOI: 10.1016/j.ajo.2006.07.046
Source: PubMed

ABSTRACT To evaluate the incidence of Intraoperative Floppy Iris syndrome (IFIS) in relation to the usage of alpha(1)-adrenoceptor antagonists.
Prospective, interventional case series.
In 2,643 consecutive eyes of 1,968 patients undergoing cataract surgery, occurrence of IFIS and use of alpha(1) antagonists were recorded.
IFIS was observed in 29 eyes (1.1%) of 25 male patients, all of whom were receiving alpha(1) antagonists. In those receiving systemic tamsulosin, alpha(1A) selective antagonist, IFIS developed in 25 (43.1%) of 58 eyes. In those receiving systemic naftopidil, alpha(1A) and alpha(1D) antagonists, IFIS was found in 4 (19.0%) of 21 eyes. There was no case of IFIS in patients who received other systemic alpha(1) antagonists and in eyes treated with bunazosin eyedrops, a nonselective alpha(1) antagonist.
IFIS occurred in 1.1% of cases treated with systemic alpha(1A)-adrenoceptor antagonists for benign prostatic hypertrophy. Topical nonselective alpha(1) antagonist did not induce IFIS.

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    ABSTRACT: To determine whether severe intraoperative floppy iris syndrome (IFIS) is more or equally likely with tamsulosin or alfuzosin. Prospective, masked, multicenter, cross-sectional study. Consecutive patients taking systemic tamsulosin or alfuzosin and scheduled for routine cataract surgery (case group) and patients with no history of systemic α1-antagonists scheduled for routine cataract surgery (control group). Phacoemulsification with intraocular lens implantation was performed and recorded on video. Intracameral phenylephrine or epinephrine, either by direct injection or placement in the irrigation bottle, was not permitted. Every surgical video subsequently was reviewed remotely by 2 masked investigators who diagnosed the presence or absence of IFIS and graded the severity of IFIS as follows: none, mild (billowing only), moderate (billowing and either iris prolapse or ≥2 mm of pupil constriction), or severe (billowing accompanied by iris prolapse and ≥2 mm of pupil constriction). Rate and severity of IFIS and surgical complication rate. A total of 226 eyes (70 in the tamsulosin group, 43 in the alfuzosin group, and 113 in the control group) were enrolled. Severe IFIS was noted in 34.3% (24/70) of the tamsulosin eyes and in 16.3% (7/43) of the alfuzosin eyes compared with 4.4% (5/113) of the control eyes. The differences between each of the 3 groups were statistically significant. In the absence of epinephrine in the irrigation bottle, 12.4% of control eyes had moderate to severe IFIS. There were no instances of posterior capsular rupture or significant surgical complications in either the case or control groups. Moderate to severe IFIS can occur in low-risk eyes when epinephrine is omitted from the irrigation bottle. Although both tamsulosin and alfuzosin significantly increase the risk of IFIS compared with patients without prior α1-antagonist intake, severe IFIS statistically was more likely with tamsulosin than with alfuzosin (P = 0.036). Patients with symptomatic benign prostatic hyperplasia and cataracts requiring a uroselective α1-antagonist may consider trying alfuzosin first. The author(s) have no proprietary or commercial interest in any materials discussed in this article.
    Ophthalmology 12/2013; · 5.56 Impact Factor
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    Albrecht von Graæes Archiv für Ophthalmologie 11/2013; · 1.93 Impact Factor
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    ABSTRACT: The purpose of this study was to evaluate the incidence, risk factors, and impact of intraoperative floppy iris syndrome (IFIS) on surgical performance. Materials and Methods : Consecutive cataract surgeries from October 2010 to Feb 2011 (1003 eyes, 980 patients; 568 males, 412 females) were analyzed prospectively. Operating surgeon, masked about medication history, noted the intraoperative details. Cases were identified as IFIS or non-IFIS. Multivariate analysis was performed to find risk factors for IFIS. Results : Prevalence of tamsulosin use among men undergoing cataract surgery was 7.0% (41) with incidence of IFIS 4.78% (48). On multivariate analysis, hypertension (OR: 3.2, 95% confidence interval, 95% CI: 1.39-6.57; P = 0.005), use of tamsulosin (OR: 133.32, 95% CI: 50.43-352.48; P < 0.0001), or alfuzosin (OR: 9.36, 95% CI: 2.34-37.50; P = 0.002) were the factors associated with IFIS. Among men taking tamsulosin (n = 41) and alfuzosin (n = 28), 68.3% and 16.6% developed IFIS, respectively. In subgroup analysis of men on tamsulosin, no factor added to the risk posed by tamsulosin. Seventeen of 944 eyes not exposed to any drug had IFIS (0.018%). On subgroup analysis, only risk factor for IFIS was hypertension (OR: 4.67, 95% CI: 1.63-13.35; P = 0.002). Of 48 IFIS eyes, the surgeon observed increased difficulty in 57.1% (21) and additional measures were required in 9 eyes. Mean operative time was increased in IFIS eyes (11.68 ± 3.46 vs. 10.01 ± 0.22 min; P = 0.001). Surgical outcome was good in all cases. Conclusion : The prevalence of tamsulosin intake and IFIS incidence is higher in India. Current tamsulosin/alfuzosin use and hypertension are important risk factors. IFIS makes the surgery more difficult, significantly prolongs the operative time, and predisposes for other intraoperative complications. However, with appropriate management, final operative outcome is not affected.
    Indian Journal of Ophthalmology 08/2014; 62(8):870-5. · 1.02 Impact Factor