A blood collection tube holder embodying two coaxially alignable needles, the first needle being a forwardly facing venipuncture needle and the second needle being a rearwardly facing fluid discharge needle. The first and second needles are satisfactorily supported by a frontal attachment and body, respectively, that are disposed in relative sliding engagement along an interface that is transverse to the first and second needle and that extends at least from the second needle to an opening into a needle retraction chamber that projects rearwardly from the body. The subject device is configured to receive and support a conventional blood collection tube of the type used to collect blood samples.一種具體實施兩個可同軸對準針頭之採血管架，該第一針頭係面向前靜脈穿刺針頭且該第二針頭係面向後的流體排出針頭。該第一及第二針頭係分別藉由前緣附接件與本體而被令人滿意地支撐，該前緣附接件與本體被設置成沿著介面而相對滑動嚙合，該介面係橫向於該第一及第二針頭且從該第二針頭至少延伸至從該本體向後突出之針頭回縮腔室中的開口。本裝置被組構成用以接收及支撐用以採集血液樣本之類型的習知採血管。
