| 摘要 |
A multiple sample needle assembly useful in collecting liquid samples from a source comprises a housing with a chamber therein. A first cannula is in fluid communication with the chamber and is adapted for insertion into a liquid source. A second cannula is also in fluid communication with the chamber and is adapted to deliver liquid passing through the chamber to a liquid collector. A gas-permeable, liquid-impermeable porous member is positioned in the lumen of the second cannula. The second cannula preferably includes at least one side hole and an operable valve for collecting liquid from the second cannula by diverting liquid flowing therethrough away from the liquid-impermeable member. |
