Catheter blood pumps and external fluid control consoles
Intravascular blood pumps and methods of use. The fluid system can be configured to pump fluid to a sheath portion and a catheter portion of a catheter blood pump. The fluid system can include a console having one or more pumps for providing fluid flow to the catheter blood pump. A return waste line may return from the catheter blood pump. A removable fluid cassette that directs fluid flow may be coupled to the console. The blood pump may include a pump portion that includes a collapsible blood conduit defining a blood flow lumen between an inflow and an outflow. The pump portion may include a distal collapsible impeller axially spaced from a proximal collapsible impeller, at least a portion of each of the distal and proximal collapsible impellers disposed between the inflow and the outflow.
1 . A fluid management system for a catheter blood pump, comprising:
a fluid cassette including a first fluid line and a second fluid line; and
a console including a first pump and a second pump configured to releasably couple with the fluid cassette, wherein the console is configured to secure the fluid cassette in an engaged position in which:
the first pump is operational to pump fluid to the catheter blood pump via the first fluid line, and
the second pump is operational to pump fluid to the catheter blood pump via the second fluid line;
wherein the first fluid line is directed to a sheath of the catheter blood pump, and the second fluid line is directed to a cannula of the catheter blood pump; and wherein fluid flow through the first fluid line to the sheath of the catheter blood pump prevents blood from entering an annular space between the sheath and the cannula of the catheter blood pump.
2 . The fluid management system of claim 1 , wherein the first pump and the second pump are peristaltic pumps.
3 . The fluid management system of claim 1 , wherein the fluid cassette includes:
a first flexible tubing configured to operationally engage with a first pump head of the first pump when the fluid cassette is in the engaged position, and
a second flexible tubing configured to operationally engage with a second pump head of the second pump when the fluid cassette is in the engaged position.
4 . The fluid management system of claim 1 , wherein the fluid cassette is configured to transition between the engaged position and an unengaged position, wherein the first and second pumps are not operational to pump fluid to the catheter blood pump in the unengaged position.
5 . The fluid management system of claim 4 , wherein the console is configured to translate or rotate the first and second pumps relative to the fluid cassette to transition between the engaged and unengaged positions.
6 . The fluid management system of claim 5 , wherein the console is configured to:
move a first pump head toward a first tubing of the fluid cassette to operationally engage the first tubing with the first pump, and
move a second pump head toward a second tubing of the fluid cassette to operationally engage the second tubing with the second pump.
7 . The fluid management system of claim 4 , wherein the console is configured to translate or rotate the fluid cassette relative to the first and second pumps to transition between the engaged and unengaged positions.
8 . The fluid management system of claim 4 , wherein the console includes a latch configured to control transition of the fluid cassette between the engaged and unengaged positions.
9 . The fluid management system of claim 8 , wherein the latch is a door that covers the fluid cassette.
10 . The fluid management system of claim 1 , wherein the fluid cassette includes a fluid split region configured to divide an inlet fluid line of the fluid cassette into the first fluid line and the second fluid line.
11 . The fluid management system of claim 1 , wherein the fluid cassette includes a manifold having channels configured to direct fluid to a first flexible tubing associated with a first pump head of the first pump and a second flexible tubing associated with a second pump head of the second pump.
12 . The fluid management system of claim 1 , wherein the fluid cassette includes a fluid inlet at a first side of the fluid cassette and two fluid outlets at a second side of the fluid cassette.
13 . The fluid management system of claim 12 , wherein the first side is opposite the second side.
14 . The fluid management system of claim 1 , wherein the console comprises a cassette receiving area, wherein the cassette receiving area includes a door configured to cover the fluid cassette when in the engaged position.
15 . The fluid management system of claim 1 , wherein the console includes a computer configured to control flow rates of the first and second pumps, wherein the computer includes instructions that cause the first pump to pump fluid through the first fluid line at a first flow rate and to cause the second pump to pump fluid through the second fluid line at a second flow rate that is higher than the first flow rate.
16 . The fluid management system of claim 1 , wherein the fluid cassette is configured to direct fluid through the first and second fluid lines such that the first and second pumps independently control fluid flow through respective first and second fluid lines.
17 . The fluid management system of claim 1 , wherein the fluid cassette is configured to direct fluid through the first fluid line in parallel with the second fluid line.
18 . The fluid management system of claim 1 , wherein the console includes one or more scales configured to measure a weight of one or more fluid bags.
19 . The fluid management system of claim 18 , wherein the one or more fluid bags include a clean saline bag in fluid communication with the first and second fluid lines to the catheter blood pump and a waste bag in fluid communication with a waste fluid line returning from the catheter blood pump.