Method and apparatus for evacuating and then collecting...

Details Method and apparatus for evacuating and then collecting... Method and apparatus for evacuating and then collecting...

A - Human Necessities

61

M

73/103, 128/83

A61M 1/00 (2006.01) A61B 5/145 (2006.01) A61B 5/15 (2006.01)

Patent

CA 1098000

ABSTRACT OF THE DISCLOSURE A method and apparatus are provided for reducing the pressure in and then collecting medium samples in containers such as test tubes sealed by a resilient stopper at sbustantially atmospheric pressure, comprising piercing the stopper at or shortly before the time of collection of a medium sample by a first cannula, connected at one end to a pressure-reducing device, thereby connecting the interior of the container with the pressure-reducing device via the first cannula; evacuating the container to a desire subatmospheric pressure; withdrawing the first cannula; penetrating the stopper by a second cannula connected at one end to a medium source to be sampled, thereby connecting the source with the interior of the container via the second cannula; and then sucking a sample of medium into the container under the influence of the subatmospheric pressure effected in the interior of the container by the pressure reduction.

259989

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