Patent Number: 
Section: claims

1. A device for producing a fluid containing a radioactive constituent, the device comprising: a shielded chamber within which is located an isotope container housing a radioactive isotope, the shielded chamber including first and second fluid connections to opposing ends of the isotope container and a fluid conduit extending from each of the first and second fluid connections to a fluid inlet and a fluid outlet respectively characterised in that the fluid inlet comprises a single spike comprising a spike body having a substantially circular cross-section, the spike body being adapted to penetrate the rubber seal of a vial and wherein the spike body further defines a first bore extending from a first aperture adjacent the tip of the spike to a fluid connection with the fluid conduit and a second bore extending from a second, separate aperture in the spike body to a filtering air inlet, wherein the spike body incorporates a barrier filter in the second bore. 2. A device as claimed in claim 1 further comprising an outer housing which supports the fluid inlet and the fluid outlet and the spike of the fluid inlet projects through an aperture in the outer housing. 3. A device as claimed in claim 2, wherein the outer housing defines a well about the aperture through which the spike projects, the well being structured to receive a vial. 4. A device as claimed in claim 1, wherein the barrier filter comprises a filter disk of polytetrafluoroethylene. 5. A device as claimed in claim 1, wherein the filter is positioned in the second bore adjacent to the filtering air inlet.