Quantitative study of the effect of dacryocystorhinostomy on lacrimal drainage.
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.
Malbouisson
J M
JM
School of Medicine of Ribeirão Preto, University of São Paulo and Institute of Physics, Brazil.
Bittar
M D
MD
Obeid
H N
HN
Guimarães
F C
FC
Velasco e Cruz
A A
AA
D000293:Adolescent; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D003608:Dacryocystorhinostomy; D006801:Humans; D007765:Lacrimal Apparatus / Q000000981:diagnostic imaging / Q000503:physiopathology*; D007766:Lacrimal Apparatus Diseases / Q000503:physiopathology* / Q000601:surgery; D008875:Middle Aged; D008962:Models, Theoretical; D011877:Radionuclide Imaging; D013666:Tears / Q000502:physiology*; D013667:Technetium; D016896:Treatment Outcome
D013667:Technetium