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  • Fluorescent Tracers in Neurosurgical Procedures: A European Survey

    Final Number:
    1443

    Authors:
    Francesco Restelli; Davide Locatelli; Camilla De Laurentis; Jacopo Falco; Paolo Ferroli MD; Francesco Acerbi MD, PhD

    Study Design:
    Other

    Subject Category:

    Meeting: Congress of Neurological Surgeons 2018 Annual Meeting

    Introduction: In recent years several techniques have been proposed with the aim of improving tumors visualization and extent of resection and, among them, the use of photosensitive dyes is gaining great interest. Regarding the application of the two most used dyes, 5-aminolevulinic acid (5-ALA) and sodium fluorescein (SF), there is still a lack of shared and established protocols among different centers. The main objective of the present study was to evaluate the current practice of fluorescence-guided techniques in neuro-oncological surgery in Europe.

    Methods: An online questionnaire consisting of 33 questions was completed by 136 European Association of Neurosurgical Societies (EANS) neurosurgeons. Responses were entered into a database and subsequently analyzed.

    Results: Data were analyzed from 136 out of 1476 active European neurosurgeons which had been contacted. Based on the data from the questionnaire, Germany was the most responsive country (15% of the total respondents) and the main indications for 5-ALA and SF utilization were high-grade gliomas. 5-ALA was mainly used as defined in Gliolan® datasheet, while SF as off-label technique with a 5 mg/kg dose of injection at the end of patient intubation. Pentero Zeiss® microscope with appropriate filters loaded on it was the preferred brand for both 5-ALA and SF users. Both the dyes were mainly used in adult population, more frequently by neurosurgeons with less-than 20 cases per year expertise. Mean price per patient were 817,6 € and 7,7 € for 5-ALA and SF, respectively.

    Conclusions: 5-ALA is still the preferred and more established fluorescent dye used during high-grade gliomas resection, with SF as a gaining-attention, really cheaper and more ductile alternative.

    Patient Care: Regarding the use of fluorescent dyes in neuro-oncological surgery, there is still a lack of shared and established protocols among different centers in Europe, that eventually lead to confusion and misunderstandings when comparing results obtained in different hospitals with different clinical and surgical settings, ultimately leading to patients treatment not really science-based. Given also that SF has recently gained great interest and since its first application in neurosurgery it has been used more frequently year after year, we considered the present time a good moment to create and present a current practice-picture of florescent tracers use in neurosurgery. We strongly believe that studies such the present one may help in identifying differences among common practices in different hospital and countries, shedding light on the need to review our methods, aiming to the best possible protocol of treatment for patients.

    Learning Objectives: By the conclusion of this session, participants should be able to: 1) describe the main indications and methods of use for the two most used fluorescent tracers in neuro-oncological surgery; 2) Discuss, in small groups, indications, contraindications, limits and benefits given by the use of sodium fluorescein or 5-aminolevulinic acid in neurosurgery; 3) To present a current-practice-picture of fluorescent tracers use in European neurosurgical community.

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