Inoculation loop assembly
A disposable inoculation loop assembly comprising a test tube and a tube stopper adapted to fit into a free end of the test tube. A first end of the stopper faces into the interior of the test tube substantially hermetically sealing the interior of the test tube. The assembly further includes an inoculation loop fixed to the tube stopper and extending into the interior of the test tube to a predetermined distance when the stopper is positioned in the free end of the test tube. The assembly when assembled is sterilized and pre-evacuated to a predetermined vacuum which is sufficient to draw a volume of a bodily liquid to be sampled into the test tube. The volume is of such an amount so that the liquid level in the test tube substantially just covers a predetermined portion of the inoculation loop.
1. A disposable inoculation loop assembly comprising:
a test tube;
a tube stopper having first and second ends and adapted to fit into a free end of said test tube such that said first end faces into the interior of said test tube, and so as to substantially hermetically seal the interior of said test tube from the ambient, said stopper having a predetermined cannula insertion location for the insertion therethrough of a liquid sampling cannula; and
an inoculation loop fixed to said tube stopper so as to extend into the interior of said test tube to a predetermined distance when said tube stopper is positioned in said free end of said test tube,
wherein a portion of said inoculation loop has a liquid conducting portion, bounded by a liquid inlet, and by a liquid outlet, said outlet formed so as to face generally outwards toward an adjacent test tube wall portion, and wherein said predetermined cannula insertion location is positioned in registration with said liquid inlet, such that liquid is dispensed from the cannula into said liquid inlet, whereafter the liquid flows along said liquid conducting portion so as to be delivered into said test tube via said liquid outlet so as not to impinge upon said inoculation loop, and
wherein said assembly when assembled is sterilized and pre-evacuated to a predetermined vacuum sufficient to draw a volume of a bodily liquid to be sampled into said test tube, said volume being of such an amount so that the liquid level in said test tube substantially just covers a predetermined portion of said inoculation loop.
2. A disposable inoculation loop assembly according to claim 1 wherein said inoculation loop and said cannula insertion location are both positioned centrically with respect to said stopper.
3. A disposable inoculation loop assembly according to claim 1 , wherein said inoculation loop comprises a rod and a loop eye positioned at one end of said rod, the volume of the bodily liquid being drawn is in an amount so that the liquid level in said test tube is such that it substantially just covers said loop eye.
4. A disposable inoculation loop kit comprising:
an inoculation loop assembly comprising:
a test tube;
a tube stopper having first and second ends and adapted to fit into a free end of said test tube such that said first end faces into the interior of said test tube, and so as to substantially hermetically seal the interior of said test tube from the ambient, said stopper having a predetermined cannula insertion location for the insertion therethrough of said liquid sampling cannula; and
an inoculation loop fixed to said tube stopper so as to extend into the interior of said test tube to a predetermined distance when said tube stopper is positioned in said free end of said test tube,
wherein a portion of said inoculation loop has a liquid conducting portion, bounded by a liquid inlet, and by a liquid outlet, said outlet formed so as to face generally outwards toward an adjacent test tube wall portion, and wherein said predetermined cannula insertion location is positioned in registration with said liquid inlet, such that liquid is dispensed from the cannula into said liquid inlet, whereafter the liquid flows along said liquid conducting portion so as to be delivered into said test tube via said liquid outlet so as not to impinge upon said inoculation loop, and
wherein said assembly when assembled is sterilized and pre-evacuated to a predetermined vacuum sufficient to draw a volume of a bodily liquid to be sampled into said test tube, said volume being of such an amount so that the liquid level in said test tube substantially just covers a predetermined portion of said inoculation loop; and
a sample collection vessel for collecting a liquid sample of a bodily fluid; and
a cannula having at least one sharpened end for piercing said stopper and transferring sample liquid from said vessel to said test tube of said assembly, the transfer effected by the predetermined vacuum in said test tube.
5. A disposable inoculation loop kit according to claim 4 , wherein said inoculation loop and said cannula insertion location are both positioned centrically with respect to said stopper.
6. A disposable inoculation loop kit according to claim 4 , wherein said inoculation loop comprises a rod and a loop eye positioned at one end of said rod, the volume of the bodily liquid being drawn is in an amount so that the liquid level in said test tube is such that it substantially just covers said loop eye.