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Abstract #17057 Published in IGR 9-1
Comparison between the 1% and 2% ibopamine provocative test in primary open-angle glaucoma patients: Sensitivity, specificity and tolerability
Magacho L; Costa ML; Dessimoni A; de Avila MPArquivos Brasileiros de Oftalmologia 2006; 69: 695-699
PURPOSE: To compare intraocular pressure (IOP) rise in normal individuals and primary open-angle glaucoma patients and the safety and efficacy of ibopamine eye drops in different concentrations as a provocative test for glaucoma. METHODS: Glaucoma patients underwent (same eye) the ibopamine provocative test with two concentrations, 1% and 2%, in a random sequence at least 3 weeks apart, but not more than 3 months. The normal individuals were randomly submitted to one of the concentrations of ibopamine (1% and 2%). The test was considered positive if there was an IOP rise greater than 3 or 4 mmHg at 30 or 45 minutes to test which subset of the test has the best sensitivity (Se)/specificity (Sp). RESULTS: There was no statistically significant difference in any of the IOP measurements, comparing 1% with 2% ibopamine. The IOP was significantly higher at 30 and 45 minutes with both concentrations (p < 0.001). The best sensitivity/specificity ratio was achieved with the cutoff point set as greater than 3 mmHg at 45 minutes with 2% ibopamine (area under the ROC curve: 0.864, Se: 84.6%; Sp:73.3%). All patients described a slight burning after ibopamine's instillation. CONCLUSION: 2% ibopamine is recommended as a provocative test for glaucoma. Because both concentrations have similar ability to rise IOP, 1% ibopamine may be used to treat ocular hypotony.
Dr. L. Magacho, Rua 131, No. 313 - Setor Sul, Goiania, GP 74093-200, Brazil. lmagacho@brturbo.com.br
Classification:
6.13 Provocative tests (Part of: 6 Clinical examination methods)
