Liquid collection container and extracorporeal circuit
AssigneeTerumo Kabushiki Kaisha
InventorsNorikazu ISHIDA, Hidetaka Nakayama
Life of this patent
Estimating the term…
Abstract
A liquid collection bag is used as a part of an extracorporeal circuit and is connected via a tube to a storage container containing a priming solution. The collection container collects the priming solution from the storage container by a pressure differential between the pressure inside the collection container and the pressure inside the storage container. The liquid collection container is a flexible bag body having a partition part dividing the inside of the bag body into a first space and a second space. In addition, a communication part communicates the first space with the second space.
Claims20
An extracorporeal circuit for extracorporeally circulating blood, comprising:
- a blood reservoir possessing a storage chamber for temporarily storing liquid, the reservoir comprising a tube having an upper end, the reservoir having a lower end opening at a bottom region of the storage chamber;
- an arterial line connectable to a patient during extracorporeal circulation to receive blood from the patient;
- a venous line connectable to a patient during extracorporeal circulation to return blood to the patient;
- a pump connected to the lower end opening of the blood reservoir;
- the upper end of the tube of the blood reservoir being adapted to be connected to a source of priming solution;
- an oxygenator connected to the arterial line and the pump to effect gas exchange on the blood from the patient;
- a flexible collection container possessing an interior for collecting the priming solution;
- a partition in the interior of the collection container dividing the interior of the collection container into a first space positioned above a second space;
- a branch line in fluid communication with the venous line and branching from the venous line, the first space being in fluid communication with the branch line;
- the interior of the collection container comprising a communication part for establishing communication between the first space and the second space;
- and
- wherein the priming solution is introduced into the first space by way of the branch line, and is collected in the second space via the communication part.
A liquid collection bag in combination with a storage container, the liquid collection bag possessing an interior connected in a fluid communicating manner to an interior of the storage container byway of a tube, the interior of the liquid collection bag being adapted to receive and collect liquid from the storage container based on a difference in pressure between an inside of the liquid collection bag and an inside of the storage container, the liquid collection bag comprising:
- a flexible bag body enclosing the interior of the collection bag, with a partition part dividing the interior of the collection bag into a first space and a second space;
- an introduction part connected to the tube and having an end positioned in the first space to introduce the liquid from the storage container which has passed through the tube into the first space;
- the bag body being provided with a communication part extending between the first and second spaces for establishing communication between the first space and the second space;
- and
- the liquid from the storage container is introduced into the first space by way of the introduction part, and is collected into the second space by way of the communication part.
A method of priming a circuit to be used in extracorporeal blood circulation, the method comprising:
- connecting a blood reservoir to a source of priming solution, the blood reservoir possessing a bottom, the circuit comprising:
- an oxygenator, an arterial line connected to the oxygenator, a pump connected, a first line connecting in a fluid communicating manner the pump and the bottom of the blood reservoir, a second line connecting in a fluid communicating manner the pump and the oxygenator, a venous line connected to the blood reservoir, a flexible collection container possessing an interior, and a third line branching from the venous line and having an open end opening into the interior of the collection container;
- positioning the collection container so that the open end of the third line is positioned elevationally below an objective height in the blood reservoir;
- introducing the priming solution into the blood reservoir from the source while the third line is closed, the priming solution flowing from the blood reservoir through the first line, through the pump, through the second line, through the oxygenator and through the arterial line;
- and
- opening the third line after the priming solution in the blood reservoir is elevationally at or above the objective height so that the priming solution automatically flows into the collection container.
Dependencies are inferred from the claim text.