Hemodialysis system
First Claim
1. A drain cassette for a dialysis unit, comprising:
- a body having a front side and a back side opposite the front side;
a venous connection port on the front side of the body for removable connection to, and fluid communication with, a venous blood line connector of a blood tubing set mounted to an exposed panel of the dialysis unit;
an arterial connection port on the front side of the body for removable connection to, and fluid communication with, an arterial blood line connector of the blood tubing set;
a fluid channel defined by the body and fluidly connecting the venous connection port and the arterial connection port for circulation of fluid between an arterial blood line and a venous blood line of the blood tubing set;
a drain outlet port in fluid communication with the fluid channel, the drain outlet port being located on the back side of the body and arranged to removably couple with a drain connector on the exposed panel; and
a valve arranged to control flow in the fluid channel,wherein the valve is arranged to either controllably open and close fluid communication in the fluid channel between the drain outlet port and the venous connection port or to controllably open and close fluid communication in the fluid channel between the drain outlet port and the arterial connection port, wherein the drain cassette is configured such that mounting the drain cassette to the exposed panel removably couples the drain outlet port with the drain connector on the exposed panel and dismounting the drain cassette from the exposed panel uncouples the drain outlet port from the drain connector, and wherein the drain cassette is mountable to the exposed panel separate from any blood circuit assembly that includes the arterial and venous blood line connectors.
2 Assignments
0 Petitions
Accused Products
Abstract
A drain cassette for a dialysis unit has a fluid channel between venous and arterial connection ports, and a valve may controllably open and close fluid communication between a drain outlet port and the venous connection port or the arterial connection port. A blood circuit assembly and drain cassette may be removable from the dialysis unit, e.g., by hand and without the use of tools. A blood circuit assembly may include a single, unitary member that defines portions of a pair of blood pumps, control valves, channels to accurately position flexible tubing for an occluder, an air trap support, and/or other portions of the assembly. A blood circuit assembly engagement device may assist with retaining a blood circuit assembly on the dialysis unit, and/or with removal of the assembly. An actuator may operate a retainer element and an ejector element that interact with the assembly.
623 Citations
25 Claims
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1. A drain cassette for a dialysis unit, comprising:
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a body having a front side and a back side opposite the front side; a venous connection port on the front side of the body for removable connection to, and fluid communication with, a venous blood line connector of a blood tubing set mounted to an exposed panel of the dialysis unit; an arterial connection port on the front side of the body for removable connection to, and fluid communication with, an arterial blood line connector of the blood tubing set; a fluid channel defined by the body and fluidly connecting the venous connection port and the arterial connection port for circulation of fluid between an arterial blood line and a venous blood line of the blood tubing set; a drain outlet port in fluid communication with the fluid channel, the drain outlet port being located on the back side of the body and arranged to removably couple with a drain connector on the exposed panel; and a valve arranged to control flow in the fluid channel, wherein the valve is arranged to either controllably open and close fluid communication in the fluid channel between the drain outlet port and the venous connection port or to controllably open and close fluid communication in the fluid channel between the drain outlet port and the arterial connection port, wherein the drain cassette is configured such that mounting the drain cassette to the exposed panel removably couples the drain outlet port with the drain connector on the exposed panel and dismounting the drain cassette from the exposed panel uncouples the drain outlet port from the drain connector, and wherein the drain cassette is mountable to the exposed panel separate from any blood circuit assembly that includes the arterial and venous blood line connectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A blood circuit assembly and drain cassette for a dialysis unit, the blood circuit assembly comprising:
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a pair of pneumatic pumps for circulating blood received from a patient through a circuit including a dialyzer unit and returned to the patient, the pneumatic pumps having pneumatic control ports arranged for alignment and mating with corresponding ports located on an exposed panel of the dialysis unit by pushing the control ports into engagement with the corresponding ports with mounting of the blood circuit assembly to the exposed panel; an air trap arranged to remove air from blood circulating in the circuit; a pair of dialyzer connections arranged to connect to the inlet and outlet of a dialyzer unit; and a pair of blood line connectors, including an arterial blood line connector and arterial tubing for receiving blood from the patient and providing blood to the pneumatic pumps and a venous blood line connector and venous tubing for returning blood to the patient; the drain cassette comprising; a body having a front side and a back side opposite the front side; a venous connection port on the front side of the body for removable connection to, and fluid communication with, the venous blood line connector; an arterial connection port on the front side of the body for removable connection to, and fluid communication with, the arterial blood line connector; a fluid channel defined by the body and fluidly connecting the venous connection port and the arterial connection port for circulation of fluid between the arterial and venous tubing of the blood circuit assembly; a drain outlet port in fluid communication with the fluid channel, the drain outlet port being located on the back side of the body and arranged to removably couple with a drain connector on an exposed panel of the dialysis unit; and a valve arranged to control flow in the fluid channel, wherein the drain cassette is configured such that mounting the drain cassette to the exposed panel removably couples the drain outlet port with the drain connector on the exposed panel and dismounting the drain cassette from the exposed panel uncouples the drain outlet port from the drain connector, and wherein both the blood circuit assembly and the drain cassette are separately engageable with the exposed panel for operation in a dialysis treatment, and are removable from the exposed panel for replacement, without the use of tools. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification