Method of evacuating and preserving a blood collecting device

Details Method of evacuating and preserving a blood collecting device Method of evacuating and preserving a blood collecting device

1988-12-09

1990-06-26

Smith, Ruth S.

Surgery

Truss

Pad

206571, 206438, A61B 514, B65D 8100

Patent

active

049363140

ABSTRACT:
An evacuated blood collecting device for collecting a blood sample of predetermined volume comprises: a cylindrical member having one open end and one closed end; a puncturable stopper member closing tightly the open end of the cylindrical member so as to seal the space within said cylindrical member; and a gas sealed in the space within the cylindrical member. The cylindrical member and the stopper member are made of materials having a characteristic such that the permeation coefficient of the gas sealed inside the space to at least one of the cylindrical member and stopper member is higher than that of the gas around the outside of the blood collecting device, whereby the interior of the space is retained under reduced pressure relative to the gas around the outside of the blood collecting device in proportion to the blood sampling volume.

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