| 摘要 |
A blood collection unit has a primary tube of narrow bore hermetically and concentrically assembled to a secondary tube of larger diameter either by a plunger attached to the primary tube and on which the secondary tube is slidably mounted, or by the skirt of a stopper closing both tubes. One of the tubes is closed by a stopper of fitting-over form, the two tubes forming a closed communicating space into which a blood sample is introduced through a double ended needle, passing into one of the tube prior to passing into the other tube. For sedimentation rate determinations, the plunger system can be operated either with or without the closed communicating space under vacuum. Progressive entry of blood into the system is controlled by the narrow bore primary tube. |
