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Need for confirmation of positioning of ruthenium plaques by postoperative B-scan ultrasonography
1Department of Ophthalmology, Hadassah University Hospital, Jerusalem, Israel.
Background And Objective:
Plaque positioning is of utmost importance for the effective treatment of intraocular lesions. The authors' objective was to verify the position of ruthenium plaques after surgical placement.
Patients And Methods:
The authors studied the positions of ruthenium-106 (Ru-106) plaques in 43 patients treated for choroidal tumors by B-scan echography on the first postoperative day.
Results:
In 29 of 43 eyes (67.4%) the episcleral plaque was found to be well centered 1 day after surgery. Ten eyes (23.3%) had borderline-placed plaques, and the remaining 4 (9.3%) plaques were malpositioned. All the malpositioned plaques were situated behind posterior tumors whose uncovered edge was adjacent to the optic nerve.
Conclusion:
Ultrasonic verification in the postoperative period is essential to detect inadvertent misplacement or displacement of radioactive plaques. Plaque replacement or additional and modified treatment can be considered for those plaques found to have moved after the surgical placement.