Catheter having dedicated blood collection port and related methods
An extension set for a catheter assembly may include a first lumen coupled to an infusion port and a second lumen coupled to a blood collection port. The second lumen may include a flow resistance that is optimized to reduce hemolysis during blood collection.
1 . A catheter assembly, comprising:
a catheter adapter having a distal end comprising an intravenous catheter, a proximal end configured to receive a needle assembly, and an interior lumen extending therebetween; and
a first lumen and a second lumen;
an extension tube, wherein the first lumen and the second lumen extend through the extension tube, the first lumen and the second lumen being in fluid communication with the interior lumen at a first end of the extension tube;
a y-port comprising:
an infusion port, wherein the first lumen extends through the infusion port; and
a blood collection port, wherein the second lumen extends through the blood collection port, wherein the first lumen extends between the catheter adapter and the infusion port, wherein the second lumen extends between the catheter adapter and the blood collection port, wherein the first lumen and the second lumen extend through the y-port as mutually isolated fluid pathways such that the first lumen and the second lumen are entirely fluidically separated from each other within the y-port.
2 . The catheter assembly of claim 1 , wherein a flow resistance of the second lumen is greater than a flow resistance of the first lumen.
3 . The catheter assembly of claim 1 , wherein a cross-section area of the first lumen is greater than a cross-section area of the second lumen.
4 . The catheter assembly of claim 1 , wherein the extension tube consists of a single tube comprising the first and second lumens.
5 . The catheter assembly of claim 4 , wherein the second lumen is positioned within the first lumen within the extension tube.
6 . The catheter assembly of claim 4 , wherein the first lumen is positioned within the second lumen within the extension tube.
7 . The catheter assembly of claim 4 , wherein the first lumen and second lumen are separated by an interior wall of the single tube.
8 . The catheter assembly of claim 7 , wherein the interior wall is a sidewall of the first or second lumen.
9 . The catheter assembly of claim 1 , wherein a flow resistance of the second lumen is configured to minimize hemolysis.