Have you looked for “stranger things” in your automated PET dose dispensing system? A process and operators qualification scheme

Tristan Martin (1) , Anaïs Moyon , Cyril Fersing (2, 3) , Evan Terrier (1) , Aude Gouillet (1) , Fabienne Giraud , Benjamin Guillet , Philippe Garrigue

1 APHM - Assistance Publique - Hôpitaux de Marseille
2 IBMM - Institut des Biomolécules Max Mousseron [Pôle Chimie Balard]
3 ICM - UNICANCER - Institut régional du Cancer Montpellier Val d'Aurelle

Background: Many nuclear medicine departments have equipped themselves with automated dispensing systems (ADS) for PET radiopharmaceuticals, in both the operators' and the patients' interests. Whether partially or fully automated, to date there is no marketed ADS representing a true "closed-system". Despite the sterile, injectable nature of ready-to-use radiopharmaceutical drug solutions manipulated by these systems, neither manufacturer's recommendation nor literature report was found about specific qualification of the process' sterility, or about operators' qualification on these dispensing systems. We set up a master plan validation in a radiopharmacy equipped with Trasis Unidose®, including: 1) monthly process-simulating media-fill tests and microbiological contamination assessments of the ADS surfaces; 2) initial and periodic qualification of the operators. The microbiological qualification consisted in surface biocontamination assessment on critical zones with Tryptic-Soy agar. The operator qualification consisted in the evaluation of the operators' knowledge and skills for using the ADS.Results: This study highlighted a minor, handborne microbiological contamination on our first assessment, that corrective actions solved. We therefore decided to brief our operators once a month on microbiological control results, hygiene and good practices, with the support of the present case illustrating the biodecontamination efficiency.Conclusions: As the automation of PET monodose conditioning process still implies human intervention for material preparation and manual biodecontamination, this study illustrates that initial and periodic qualification of the environment and the conditioning process of ADS, including microbiological qualification and operators' qualification, are needed to meet specifications.

Mots clés: Dispensing system; PET; Qualification; Radiopharmaceuticals

Domaines: Sciences pharmaceutiques

Tristan Martin, Anaïs Moyon, Cyril Fersing, Evan Terrier, Aude Gouillet, et al.. Have you looked for “stranger things” in your automated PET dose dispensing system? A process and operators qualification scheme. European Association of Nuclear Medicine, issuing body - EJNMMI radiopharmacy and chemistry, 2019, 4 (1), pp.11. ⟨10.1186/s41181-019-0061-8⟩. ⟨hal-04175661⟩