Abstract An article for drawing and holding a blood sample and adapted to be centrifuged to thereby position a separator between the packed cell portion of the blood, the heavier phase, and the serum or plasma portion, the lighter phase. The article includes a rigid evacuated tubular container hermetically sealed with a removable resilient stopper, an inner cover element within the container detachably connected to the stopper to be separated therefrom on centrifugation of the blood sample, the element having plural filter openings therein, and a quantity of an inert semifluid sealant in the bottom of the container, the cover element and the sealant each having a specific gravity greater than the serum or plasma portion but less than the packed cell portion. In centrifuged position, the cover element intimately overlies the sealant and is supported from the wall structure of the container by the sealant, the sealant closing the filter openings and forming with the cover element the separator.
AN ARTICLE FOR USE FOR THE CENTRIFUGAL SEPARATION OF A BLOOD SAMPLE INTO A PLASMA OR A SERUM PORTION, CONSTITUTING A LIGHTER PHASE, AND A CELLULAR PORTION, CONSTITUTING A HEAVIER PHASE, FOR THE FORMATION OF A BARRIER THEREBETWEEN, COMPRISING: A TUBULAR CONTAINER HAVING AN OPEN OUTER END AND A CLOSED INNER END; AN INNER COVER ELEMENT OF RELATIVELY RIGID MATERIAL IN SAID CONTAINER ADJACENT SAID OPEN END, SAID COVER ELEMENT COMPRISING A PLATFORM-FORMING TRANSVERSE RELATIVELY THIN WALL PORTION SUBSTANTIALLY FILLING THE CROSS SECTION OF SAID CNTAINER AND AT ITS CIRCUMFERENTIAL EXTREMITY A DEPENDIING RELATIVELY THIN SIDE WALL PORTION HAVIING AN INNER SURFACE TAPERING SO AS TO NARROW TOWARD SAID TRANSVERSE WALL P PORTION, SAID TRANSVERSE WALL PORTION DEFINING STRAIGHT-THROUGH PLURALITY NORMALLY OPEN FILTER AND VENT OPENINGS DIMENSIONED TO PASS SAID PHASES, SAID WALL PORTIONS TOGETHER DEFINING A CAVITY, THE HEIGHT OF SAID SAID INNER
Claim 2
Dependent Claim
144 words
AN ARTICLE FOR USE FOR THE CENTRIFUGAL SEPARATION OF A BLOOD SAMPLE INTO A PLASMA OR A SERUM PORTION, CONSTITUTING A LIGHTER PHASE, AND A CELLULAR PORTION, CONSTITUTING A HEAVIER PHASE, FOR THE FORMATION OF A BARRIER THEREBETWEEN, COMPRISING: A TUBULAR CONTAINER HAVING AN OPEN OUTER END AND A CLOSED INNER END; AN INNER COVER ELEMENT OF RELATIVELY RIGID MATERIAL IN SAID CONTAINER ADJACENT SAID OPEN END, SAID COVER ELEMENT COMPRISING A PLATFORM-FORMING TRANSVERSE RELATIVELY THIN WALL PORTION SUBSTANTIALLY FILLING THE CROSS SECTION OF SAID CNTAINER AND AT ITS CIRCUMFERENTIAL EXTREMITY A DEPENDIING RELATIVELY THIN SIDE WALL PORTION HAVIING AN INNER SURFACE TAPERING SO AS TO NARROW TOWARD SAID TRANSVERSE WALL P PORTION, SAID TRANSVERSE WALL PORTION DEFINING STRAIGHT-THROUGH PLURALITY NORMALLY OPEN FILTER AND VENT OPENINGS DIMENSIONED TO PASS SAID PHASES, SAID WALL PORTIONS TOGETHER DEFINING A CAVITY, THE HEIGHT OF SAID SAID INNER
Claim 3
Dependent Claim
26 words
An article as defined in claim 1, further including a quantity of fibrous glass material in said container intermediate said inner cover element and said sealant.
Claim 4
Dependent Claim
25 words
An article as defined in claim 1, wherein: said sealant is in a volume sufficient that said sealant fills said cavity when in said barrier.