[Study of change of size of the punctum before insertion and after extrusion of a punctal plug and selection of an appropriate plug for reinsertion].Nippon Ganka Gakkai Zasshi. 2005 May; 109(5):274-8.NG
In cases when the reinsertion of punctal plugs is considered, enlargement of the punctum is often experienced and a larger punctal plug is sometimes required for reinsertion. We therefore investigated the change in the size of the punctum before insertion and after extrusion of a punctal plug and the selection of an appropriate punctal plug for reinsertion.
SUBJECTS AND METHODS
There were 70 cases where punctal plugs were reinserted (37 eyes from 32 patients) because of extrusion of the plugs. A retrospective study was performed with regard to the change in the size of the punctum before insertion and after extrusion of the punctal plugs, and with regard to the type of plug reinserted.
There were significant changes in the size of the punctum before insertion [0.70 +/- 0.09 (mean +/- standard deviation) mm] and after extrusion (0.78 +/- 0.07 mm) of the punctal plug (p < 0.001). In 22 cases of 23 cases which experienced extrusion of the 0.8 mm Eagle plug (EP; Eagle Vision), Punctal plugs (PP; FCI) of M size were selected for reinsertion, because there are no EPs larger than 0.8 mm available for reinsertion.
After extrusion of the punctal plug, the punctum is likely to be enlarged, resulting in the need to select a larger punctal plug. Therefore, cases which experienced extrusion of an EP were likely to eventually have the EP replaced by a PP during follow-up treatment.