Quantitative Lacrimal Scintillography

Clinical value of dacryoscintigraphy using a simplified analysis

“…Using this analysis in 226 healthy volunteers only 25% of all studies were normal for all compartments, and in 28% of cases evidence for a possible physiological obstruction in the nasolacrimal compartment was found, as also described by Hilditch [8]. Chavis et al used transit times as evaluation parameter, and concluded that dacryoscintigraphy was not clinically valuable, because of the inconsistent findings in transport from lacrimal sac to nose [4]. In a recent study Wearne et al used qualitative factors such as "presac delay" and "preduct delay" as output parameters.…”

The Cavernous Body of the Human Efferent Tear Ducts Contributes to Regulation of Tear Outflow

“…Beside epithelial secretion products (i.e., mucins and trefoil factor family [TFF] peptides), 11,12 a decisive role is played by capillary attraction [13][14][15][16][17][18][19] aided by contraction of the lacrimal part of the orbicularis muscle with blinking 3,16,20 -23 and distension of the sac, as well as a passive wringing out of the sac because of its medial attachment and helically arranged fibrillar structures. 3 The results of the present study suggest that the cavernous body of the lacrimal passage acts as a further mechanism in tear outflow, is under neuronal control by involvement in a complex neuronal reflex feedback mechanism, and can be influenced pharmacologically.…”

The role of “after washing imaging” in evaluation of tear drainage system by dacryoscintigraphy

“…Moreover, evaluation of stenosis in the lacrimal drainage system is a possibility that has been provided by nuclear scintigraphy [11]. This technique has some Original advantages including safe and simple procedure, high sensitivity, high patient tolerance, low radiation dose to eye lens, however, the spatial resolution of this nuclear method is low and precise anatomical evaluation is not possible.…”