System for controlled delivery of medical fluids
First Claim
1. A system for controlled delivery of a medical fluid from a source of such fluid to a patient, said system consisting essentially of:
- an inlet conduit for being communicably joined to a source of the medical fluid;
an outlet conduit for being communicably joined to the patient;
first and second syringes intermediate said inlet and outlet conduits; and
a control valve assembly interconnecting said inlet conduit, said outlet conduit, said first syringe and said second syringe, said control valve assembly being alternatable between various states consisting of a first state wherein said inlet conduit communicates with said first syringe for transmitting fluid from the source to only said first syringe, a second state wherein said first syringe communicates only with said second syringe and is isolated from said inlet and outlet conduits for transmitting fluid from said first syringe to only said second syringe, and a third state wherein said second syringe communicates only with said outlet conduit and is isolated from said inlet conduit and said first syringe for transmitting fluid from said second syringe to only said outlet conduit;
said control valve assembly includes a valve body having aligned inlet and outlet ports, said inlet port is communicably connectable to said inlet conduit and said outlet port is communicably connectable to said outlet conduit, said valve body further including a first intermediate port to which said first syringe is selectively connected and a second intermediate port to which said second syringe is selectively connected, said control valve assembly further including a stopcock element mounted rotatably within said body and including a channel consisting only of a first channel segment and a second channel segment, said first segment consisting of a first end and a second end, said first end of said first segment being adjacent to a periphery of said stopcock element for alignment with said inlet port, said first intermediate port, and said second intermediate port, and said second end of said first segment being centrally located within said stopcock element, said second segment consisting of a first end and a second end, said first end of the said second segment being adjacent to said periphery of said stopcock element for alignment with said first intermediate port, said second intermediate port, and said outlet port, and said second end of said second segment being centrally located within said stopcock element and in fluid communication with said second end of said first segment, wherein said first and second channel segments are selectively alignable with said inlet port and said first intermediate port to allow for communication between said inlet conduit and said first syringe, said first intermediate port and said second intermediate port to allow for communication between said first syringe and said second syringe, and said second intermediate port and said outlet port to allow for communication between said second syringe and said outlet conduit.
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Accused Products
Abstract
A system for controlled delivery of medical fluids to a patient includes an inlet conduit attached to a source of a medical fluid and an outlet conduit connected to the patient. The inlet and outlet conduits are interconnected by a multiple stage control valve assembly and a pair of syringes. The control valve assembly is alternated between a first state wherein the inlet conduit communicates with a first syringe for transmitting fluid from the source to the first syringe, a second state wherein the first syringe communicates with a second syringe and is isolated from the inlet conduit and the outlet for transmitting fluid from the first syringe to the second syringe, and a third state wherein the second syringe communicates with the outlet and is isolated from the inlet and the first syringe for transmitting fluid from the second syringe to the patient through the outlet.
15 Citations
13 Claims
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1. A system for controlled delivery of a medical fluid from a source of such fluid to a patient, said system consisting essentially of:
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an inlet conduit for being communicably joined to a source of the medical fluid; an outlet conduit for being communicably joined to the patient; first and second syringes intermediate said inlet and outlet conduits; and a control valve assembly interconnecting said inlet conduit, said outlet conduit, said first syringe and said second syringe, said control valve assembly being alternatable between various states consisting of a first state wherein said inlet conduit communicates with said first syringe for transmitting fluid from the source to only said first syringe, a second state wherein said first syringe communicates only with said second syringe and is isolated from said inlet and outlet conduits for transmitting fluid from said first syringe to only said second syringe, and a third state wherein said second syringe communicates only with said outlet conduit and is isolated from said inlet conduit and said first syringe for transmitting fluid from said second syringe to only said outlet conduit; said control valve assembly includes a valve body having aligned inlet and outlet ports, said inlet port is communicably connectable to said inlet conduit and said outlet port is communicably connectable to said outlet conduit, said valve body further including a first intermediate port to which said first syringe is selectively connected and a second intermediate port to which said second syringe is selectively connected, said control valve assembly further including a stopcock element mounted rotatably within said body and including a channel consisting only of a first channel segment and a second channel segment, said first segment consisting of a first end and a second end, said first end of said first segment being adjacent to a periphery of said stopcock element for alignment with said inlet port, said first intermediate port, and said second intermediate port, and said second end of said first segment being centrally located within said stopcock element, said second segment consisting of a first end and a second end, said first end of the said second segment being adjacent to said periphery of said stopcock element for alignment with said first intermediate port, said second intermediate port, and said outlet port, and said second end of said second segment being centrally located within said stopcock element and in fluid communication with said second end of said first segment, wherein said first and second channel segments are selectively alignable with said inlet port and said first intermediate port to allow for communication between said inlet conduit and said first syringe, said first intermediate port and said second intermediate port to allow for communication between said first syringe and said second syringe, and said second intermediate port and said outlet port to allow for communication between said second syringe and said outlet conduit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification