Disposable blood collection and filtering device

In a blood handling system having first and second evacuated chambers, means for affixing the chambers together detachably, means for admitting fluid into the first chamber including a resilient closure at one end thereof, means for valving fluid from the first chamber to the second chamber, and means for separating components of the fluid, the improvement comprising:

• the means for affixing comprising a resilient tubular conduit having a first end resiliently fitted into the first evacuated chamber, a second end resiliently fitted into the second evacuated chamber, a middle portion larger in diameter than said first and second ends spacing-apart the ends of said first and second evacuated chambers a distance permitting said middle portion to be manually squeezed inward between the ends of the first and second evacuated chambers;
• means for valving, comprising a spherical member of frangible material resiliently fitted in sealing contact within the bore of the resilient tubular conduit in said middle portion between the ends of said first and second evacuated chambers in position to be crushed by a said manual squeeze;
• and a filter resiliently fitted in the bore within said second end of the resilient tubular conduit inserted in said second evacuated chamber, with the end of said second evacuated chamber positioned for retaining the filter against disturbance by a said manual squeezing to crush the frangible member.