A medical system configured to receive, dispense and re-use a first portion of a sterile medium injected by a syringe , the system comprising: a reservoir comprising a chamber ; a first fluid pathway comprising a first fluid conduit connected to the syringe , said first fluid conduit comprising a one-way valve configured to allow flow from the syringe to the chamber ; a second fluid pathway comprising a second fluid conduit connected to the chamber of the reservoir and to a first manifold , said first manifold comprising a three-way fluid conduit connection (B) between the chamber , the syringe and a patient delivery catheter ; a second manifold that connects the first fluid conduit and the second fluid conduit ; and a third fluid pathway comprising a third fluid conduit connected to a sterile medium container , said third fluid conduit comprising a one-way valve configured to allow flow from the sterile medium container to the second fluid conduit ; wherein, during an injection of the sterile medium from the syringe , the second fluid conduct is closed at the three-way fluid conduit connection (B) such that the injection simultaneously directs the first portion of the sterile medium injected by the syringe to the chamber of the reservoir and directs a second portion of the sterile medium injected by the syringe to the patient delivery catheter ; and wherein the reservoir is configured to impart a biasing force so as to urge the first portion of the sterile medium out of the chamber ; and wherein, during filling of the syringe with sterile medium, the second fluid conduit is open at the three-way fluid conduit connection (B) such that the filling directs the first portion of the sterile medium from the chamber and into the syringe . a reservoir comprising a chamber ; a first fluid pathway comprising a first fluid conduit connected to the syringe , said first fluid conduit comprising a one-way valve configured to allow flow from the syringe to the chamber ; a second fluid pathway comprising a second fluid conduit connected to the chamber of the reservoir and to a first manifold , said first manifold comprising a three-way fluid conduit connection (B) between the chamber , the syringe and a patient delivery catheter ; a second manifold that connects the first fluid conduit and the second fluid conduit ; and a third fluid pathway comprising a third fluid conduit connected to a sterile medium container , said third fluid conduit comprising a one-way valve configured to allow flow from the sterile medium container to the second fluid conduit ; wherein, during an injection of the sterile medium from the syringe , the second fluid conduct is closed at the three-way fluid conduit connection (B) such that the injection simultaneously directs the first portion of the sterile medium injected by the syringe to the chamber of the reservoir and directs a second portion of the sterile medium injected by the syringe to the patient delivery catheter ; and wherein the reservoir is configured to impart a biasing force so as to urge the first portion of the sterile medium out of the chamber ; and wherein, during filling of the syringe with sterile medium, the second fluid conduit is open at the three-way fluid conduit connection (B) such that the filling directs the first portion of the sterile medium from the chamber and into the syringe . <EOS>