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J. Lorenzo Carrero, I. Perez Flores; B-Scan Ultrasound to Screen for Retinal Tears in Acute Symptomatic Age-Related Posterior Vitreous Detachment. Invest. Ophthalmol. Vis. Sci. 2008;49(13):911.
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To evaluate the performance characteristics of B-scan ultrasonography (US) as a screening test for the detection of retinal tears in acute symptomatic age-related posterior vitreous detachment. (PVD)
Eye examinations included baseline biomicroscopy and funduscopic examination performed on emergency basis followed by blind B-scan kinetic US. Data were prospectively collected. Screening test characteristics of B-scan US and baseline examination (sensitivity, specificity, predictive values) were calculated using the findings of final unblind indirect ophthalmoscopy as a new reference standard. Positive and negative likelihood ratios and a likelihood nomogram with pre-test and post-test odds of retinal tears were calculated for B-scan US.
Two hundred thirty-nine patients with acute onset of age-related PVD were consecutively enrolled in a non-referral hospital.The sensitivity of B-scan US for detection of retinal tears was 96% and sensitivity of baseline examination was 89%. Both methods had a similar negative predictive value of 99%. B-scan US had a specificity of 98%. The estimated pre-test probability was 10,8% and post-test probability of a positive B-scan US was 89%.
B-scan kinetic US is a quick, accurate and cost-effective screening method for the detection of retinal tears in patients with acute, age-related PVD.
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