Abstract
BackgroundMany 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.ResultsThis 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.ConclusionsAs 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.
Highlights
Many nuclear medicine departments have equipped themselves with automated dispensing systems (ADS) for positron-emission tomography (PET) radiopharmaceuticals, in both the operators’ and the patients’ interests
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
Description of equipment Qualification was performed on a Unidose® dispenser (Trasis) placed in an adapted shielded cabinet equipped with gloves and a shielded glass oculus (Trasis)
Summary
Many nuclear medicine departments have equipped themselves with automated dispensing systems (ADS) for PET radiopharmaceuticals, in both the operators’ and the patients’ interests. We set up a master plan validation in a radiopharmacy equipped with Trasis Unidose®, including: 1) monthly processsimulating media-fill tests and microbiological contamination assessments of the ADS surfaces; 2) initial and periodic qualification of the operators. Since many evidences showed substantial benefits in radioprotection for the operators in terms of dosimetry, many nuclear medicine departments have equipped themselves with automated dispensing systems (ADS) (Covens et al 2010). 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.
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