A septum piercer and sample extractor for removing a sample from a specimen contained in a container closed by a penetrable septum, a needle having a body with a sharp closed point on its first end. The needle extends axially and contains a first channel and a second channel, which extend toward the...http://www.google.de/patents/US5660796?utm_source=gb-gplus-sharePatent US5660796 - Septum piercer and sample extractor for physiological specimens
