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In oncology, analgesia is a major issue in patient management. “Patient-controlled analgesia” (PCA) is a method that enables patients to manage their own pain, but it is not always used when patients are transferred. The aim of this study was to validate the use of a portable device that mimics the action of electric pumps used for PCA. For this purpose, two drugs were studied and analyzed. Stability studies, as well as the verification of the conformity of the specificities of the flow rate were studied, and a reflection on the dispensing circuit was also carried out. Both molecules remained stable for at least 30 hours. Compliance of the flow rates was demonstrated. The “prescription – dispensation – administration” circuit was defined and its safety ensured. These tests enabled us to “validate” this device and to use it in real life.