| 摘要 |
A disposable single-use kit for administering a precise dose of radioactive tracer to a subject with an accuracy of at least 99.9 % by weight. The kit comprises a syringe (12), pre-filled with a known quantity of a radioactive tracer as injectate (14). The back of a small-bore needle (20) is affixed to the syringe front. The front of a removable plastic needle cover (24) incorporates airtight stopper (22) for creating and maintaining an airlock in the needle front, thereby to prevent any contact between the tracer and the cover and so preclude any loss of tracer upon removal of the cover from the needle. A valve (30) normally seals the syringe back, the valve including actuatable means for enabling a fluid flow into the syringe back, both for pre-filling of the syringe with injectate and for flushing of the injectate from the syringe into the subject.
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