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Quantitative study of the effect of dacryocystorhinostomy on lacrimal drainage
J M Malbouisson1, M D Bittar, H N Obeid
1School of Medicine of Ribeirão Preto, University of São Paulo and Institute of Physics, Brazil.
Acta Ophthalmologica Scandinavica
|June 1, 1997
Abstract:
Using scintigraphy, we have studied the lacrimal drainage from the conjunctival sac of normal subjects and patients who have undergone dacryocystorhinostomy. A mathematical model of drainage was constructed that accurately described the complete activity curves for both groups. The initial rate of drainage was shown to be a relevant parameter to characterize drainage, and it was found to be different from normals to patients, indicating that the lacrimal pump mechanism is affected by dacryocystorhinostomy.