AUTOMATIC PRIME OF AN EXTRACORPOREAL BLOOD CIRCUIT
First Claim
1. A method of priming an extracorporeal blood circuit including a venous line, an arterial line and a line to a prime waste container, wherein any two of the venous line, arterial line and line to the waste container can be selectively in fluid communication with each other and a chamber including a filter that allows air to escape from the chamber, comprising:
- occluding one of the venous line or the arterial line while connecting the other of the venous or arterial line to the prime waste container;
flowing priming fluid through the circuit so that the priming fluid flows out of either the arterial or venous line into the waste container;
occluding the line to the waste container and connecting the arterial and venous lines together;
circulating priming fluid through the closed extracorporeal circuit; and
reversing the flow through the circuit, whereby air is removed from the circuit. wherein the steps of occluding one of the venous line or the arterial line, flowing priming fluid, occluding the line to the waste container, circulating priming fluid and reversing the flow through the circuit are done without need for human manipulation.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for priming an extracorporeal blood circuit is described. The system includes a fluid circuit with an air venting mechanism, a reversible pump, arterial and venous lines, a prime waste bag and a switchable coupler selectively connecting the arterial and venous lines to the waste bag or alternatively interconnecting the arterial and venous lines. A priming fluid is connected to the circuit and circulated in the circuit under different configurations of the arterial and venous line connections.
-
Citations
27 Claims
-
1. A method of priming an extracorporeal blood circuit including a venous line, an arterial line and a line to a prime waste container, wherein any two of the venous line, arterial line and line to the waste container can be selectively in fluid communication with each other and a chamber including a filter that allows air to escape from the chamber, comprising:
-
occluding one of the venous line or the arterial line while connecting the other of the venous or arterial line to the prime waste container; flowing priming fluid through the circuit so that the priming fluid flows out of either the arterial or venous line into the waste container; occluding the line to the waste container and connecting the arterial and venous lines together; circulating priming fluid through the closed extracorporeal circuit; and reversing the flow through the circuit, whereby air is removed from the circuit. wherein the steps of occluding one of the venous line or the arterial line, flowing priming fluid, occluding the line to the waste container, circulating priming fluid and reversing the flow through the circuit are done without need for human manipulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of priming an extracorporeal circuit including a venous line, an arterial line and a chamber with a filter that allows air to escape from the chamber while preventing liquid from escaping from the chamber, comprising:
-
flowing fluid through the circuit in a forward direction and a backward direction, while the arterial line and the venous line define the circuit and a supply of priming solution is in line with the circuit, wherein flowing the fluid forces air out through the filter; and stopping the flowing after a quantity of fluid sufficient to fill the circuit completely has been released into the circuit and circulated and there is no longer air in the circuit. - View Dependent Claims (13, 14)
-
-
15. A hemodialysis system configured to be automatically primed, comprising:
-
a prime fluid source container; a waste prime fluid container; an extracorporeal circuit including a venous line, an arterial line and a chamber including a filter that allows air to escape from the chamber, wherein the prime fluid source container is in fluid communication with the arterial line; a three way connector connecting the venous line, the arterial line and a waste prime fluid container; and a clamping system configured to clamp the arterial line or a connection to the waste prime fluid container closed. - View Dependent Claims (16, 17, 18, 19, 20)
-
-
21. A computer program product, encoded on a computer-readable medium, operable to cause data processing apparatus to perform operations that control a hemodialysis machine comprising:
-
receiving instructions to initiate a priming sequence; in response to receiving the instructions, sending instructions to a clamping mechanism to cause the clamping mechanism to occlude a connection between a tube to a prime container and a first patient line; after the first patient line is occluded, sending instructions to a pump to cause the pump to run in a first direction to circulate fluid through a circuit for a first pumping time; determining when the first pumping time has elapsed; after determining that the first pumping time has elapsed, sending instructions to the clamping mechanism to open the first patient line, to cause the tube to the prime container to be occluded and to cause a second patient line to be no longer in fluid connection with the prime container and to only be in fluid connection with the first patient line; after the first patient line is connected to the second patient line, sending instructions to the pump to cause the pump to run in reverse. - View Dependent Claims (22, 23, 24, 25, 26, 27)
-
Specification