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  • Title: Intraoperative floppy-iris syndrome: comparison of tamsulosin and drugs other than alpha antagonists.
    Author: Altiaylik Ozer P, Altiparmak UE, Unlu N, Hazirolan DO, Kasim R, Duman S.
    Journal: Curr Eye Res; 2013 Apr; 38(4):480-6. PubMed ID: 23373791.
    Abstract:
    BACKGROUND: To determine and compare the incidence of intraoperative floppy iris syndrome (IFIS) features in patients using tamsulosin, and other chronic medications. METHODS: We prospectively studied patients who underwent phacoemulsification (PE) between March 2006 and October 2007 on use of tamsulosin or a single medication like antihypertansive (AH), antiaggregant (AAg), antipsycotic (AP) or oral antidiabetic (OAD). Patients were grouped as tamsulosin users (Group 1), previous tamsulosin users (Group 2), chronic medication users (AH, AAg, AP or OAD) (Group 3) and patients with no medication (Group 4). Comparison of pre and postoperative visual acuities, intraocular pressures, intraoperative posterior capsular rupture (PCR) rates and grades of IFIS among groups were evaluated. RESULTS: We studied 1567 eyes of 1530 subjects. Twenty five eyes in the study demonstrated IFIS (1.6%). Five cases were included in Group 1 and IFIS incidence was 80%, while it was 60% in Group 2 (n = 5), 1 % in Group 3 (n = 1099), 1.7% in Group 4 (n = 421). IFIS incidence was significantly higher in Groups 1 and 2 compared to Groups 3 and 4 (p < 0.001). There was no difference between Groups 1 and 2 (p = 1.0) and between 3 and 4 (p = 0.29). Most cases (72%) had all three signs of IFIS. Complete IFIS was seen in one patient in Groups 1 and 2, whereas it was seen in all IFIS patients of Groups 3 and 4 (p < 0.001). Incidence of PCR was significantly higher in Group 1 (p = 0.045). CONCLUSION: Tamsulosin was found to be the drug which was most likely to be associated with IFIS, but IFIS was also observed in patients chronically using losartan, aspirin, chlorpromazine and metformin. Although, IFIS incidences were found to be similar between chronic users of these drugs and those using no medications at the time of surgery, new studies in the future will introduce the predisposing factors and the possible mechanisms of IFIS with these medications.
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