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US 4,994,022 AGranted
Blood conservation system
AssigneeStryker Corporation
InventorsMichael W. Steffler, Steven J. Carusillo
Life of this patent
Estimating the term…
Abstract
A blood conservation system capable of receiving blood and lipids from a patient. A reservoir is releasably connectable to a patient for receiving body liquids, including blood. A transfusion unit is attached for receiving blood from the reservoir. The reservoir includes a valve unit actuable for transferring blood to the transfusion unit but preventing transfer of lipids. The valve unit also controls venting of the reservoir.
Claims22
A blood conservation system capable of receiving blood and lipids from a patient, the system comprising:
- a reservoir;
- means for releasably connecting said reservoir to a patient for receiving body liquids including blood from the patient;
- transfusion means for receiving blood from said reservoir;
- and
- means for transferring blood from said reservoir to said transfusion means but preventing transfer of lipids from said reservoir to said transfusion means, said transfusion means comprising a standpipe located within the bottom portion of the reservoir and opening at a level spaced above the bottom of the reservoir for receiving liquid from the reservoir, and a hood loosely telescoped over the standpipe, the hood and standpipe having a respective outflow position permitting flow of liquid therebetween from the reservoir down through the standpipe while preventing a predetermined thickness top layer of liquid in the reservoir from escaping past the hood to the standpipe, such that lipids and other unwanted materials trapped in such top layer cannot enter the standpipe whereas blood underlying said top layer can enter said standpipe.
2 more elements
A blood conservation system capable of receiving blood and lipids from a patient, the system comprising:
- a reservoir;
- means for releasably connecting said reservoir to a patient for receiving body liquids including blood from the patient;
- transfusion means for receiving blood from said reservoir;
- and
- means for transferring blood from said reservoir to said transfusion means but preventing transfer of lipids from said reservoir to said transfusion means, said transfusion means comprising a standpipe opening at a level spaced above the bottom of said reservoir for receiving liquid from the reservoir, in inverted cup-shaped hood loosely telescoped over the standpipe, and valve means for opening and closing said standpipe opening, in which said standpipe extends up from the floor of said reservoir, said valve means comprising a valve member fixed to the underside of the closed end of said hood, said standpipe opening being at the top thereof such that raising and lowering of said hood opens and closes said standpipe opening.
2 more elements
A blood conservation system capable of receiving blood from a patient, the system comprising:
- a reservoir;
- means for releasably connecting said reservoir to a patient for receiving body liquids including blood from the patient;
- transfusion means for receiving blood from said reservoir;
- and
- means for transferring blood from said reservoir to said transfusion means and comprising valve means actuable for draining blood from said reservoir and including a valve stem extending through a wall of said reservoir adjacent the upper end of said reservoir, said reservoir having guide means for guiding said stem, and means actuable for moving said valve stem to open and close said valve means.
2 more elements
A blood conservation system capable of receiving blood from a patient, the system comprising:
- a reservoir;
- means for releasably connecting said reservoir to a patient for receiving body liquids including blood from the patient;
- transfusion means for receiving blood from said reservoir;
- and
- means for transferring blood from said reservoir to said transfusion means and comprising valve means actuable for draining blood from said reservoir and including a valve stem extending through a wall of said reservoir adjacent the upper end of said reservoir, said reservoir having guide means for guiding said stem, and means actuable for moving said valve stem to open and close said valve means, in which said means actuable for moving said valve stem comprise a manually actuable handle on the outside of said reservoir and connected to a part of said valve stem extending outside of said reservoir.
2 more elements
A blood conservation system capable of receiving blood from a patient, the system comprising:
- a reservoir;
- means for releasably connecting said reservoir to a patient for receiving body liquids including blood from the patient;
- transfusion means for receiving blood from said reservoir;
- and
- means for transferring blood from said reservoir to said transfusion means and comprising valve means actuable for draining blood from said reservoir and including a valve stem extending through a wall of said reservoir adjacent the upper end of said reservoir, said reservoir having guide means for guiding said stem, and means actuable for moving said valve stem to open and close said valve means, in which said valve stem is vertically reciprocable in said reservoir, said guide means comprising a vertical tubular member in which said valve stem is vertically slidable.
2 more elements
A system for transferring blood from a patient, comprising:
- a reservoir;
- means for releasably connecting said reservoir to a patient for receiving body fluids, including blood, from the patient;
- a suction passage on said reservoir connectable to a suction source;
- a vent passage on said reservoir connected to the atmosphere around said reservoir;
- a blood outlet on said reservoir;
- means for controlling the pressure in said reservoir, said valve means including a manually actuable valve means interposed between said suction passage and vent passage on the one hand and said reservoir on the other hand, said valve means being alternatively actuable for connecting said suction passage and vent passage alternately to said reservoir.
3 more elements
Dependencies are inferred from the claim text.