Intravenous pump chamber assembly
First Claim
Patent Images
1. An intravenous pump chamber assembly for an intravenous pump comprising:
- a base member defining a central cavity portion;
a diaphragm member positioned over said cavity portion;
a retaining member defining a central opening to accommodate a plunger member, said base member and retaining member constructed and arranged to accommodate said diaphragm therebetween in a sealing relationship;
inlet and outlet ports defining inlet and outlet passages extending through said base member and in fluid communication with said central cavity portion, said inlet and outlet ports being positioned within the confines of said cavity portion to communicate with said central cavity portion and spaced from each other with said outlet port positioned adjacent the periphery of said cavity, said base member presenting a wall defining an air bubble deterring surface between said inlet and outlet ports;
tubing receiving means defined by said inlet and outlet ports; and
inlet and outlet flexible I.V. tubing in fluid-tight communication with said respective inlet and outlet ports.
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Accused Products
Abstract
A disposable intravenous pump chamber assembly for an intravenous administration set which substantially reduces the problem of air bubble entrapment so that the amount of intravenous fluid delivered is effected in an accurate manner. The pump chamber assembly is specifically constructed to be utilized in conjunction with a diaphragm-type pump with external valving. The pump chamber cassette is held in the pump in a unique manner and includes a porting and fluid delivery arrangement which reduces the problem of air entrapment in the pump chamber.
22 Citations
19 Claims
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1. An intravenous pump chamber assembly for an intravenous pump comprising:
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a base member defining a central cavity portion; a diaphragm member positioned over said cavity portion; a retaining member defining a central opening to accommodate a plunger member, said base member and retaining member constructed and arranged to accommodate said diaphragm therebetween in a sealing relationship; inlet and outlet ports defining inlet and outlet passages extending through said base member and in fluid communication with said central cavity portion, said inlet and outlet ports being positioned within the confines of said cavity portion to communicate with said central cavity portion and spaced from each other with said outlet port positioned adjacent the periphery of said cavity, said base member presenting a wall defining an air bubble deterring surface between said inlet and outlet ports; tubing receiving means defined by said inlet and outlet ports; and inlet and outlet flexible I.V. tubing in fluid-tight communication with said respective inlet and outlet ports. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An intravenous pump of the diaphragm-type comprising:
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a mounting member; first and second contact members; a plunger member operatively positioned between said first and second contact members; means constructed and arranged to move said first and second contact members and said plunger member through said mounting member in a reciprocal manner; a base member including a wall portion defining a central cavity portion; - View Dependent Claims (12, 14, 15, 16, 17, 18, 19)
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11. a diaphragm member positioned over said cavity portion;
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a retaining member defining a central opening to accommodate said plunger member;
said base member and retaining member constructed and arranged to accommodate said diaphragm therebetween in a sealing relationship, said base, diaphragm and retaining members comprising a pump chamber cassette;inlet and outlet ports defining inlet and outlet passages extending through said base member and in fluid communication with said central cavity portion;
said inlet and outlet ports being positioned within the confines of said cavity portion to communicate with said central cavity portion and spaced from each other with said outlet port positioned adjacent the periphery of said cavity and at the top of said cassette, said base member presenting an air bubble deterring surface between said inlet and outlet ports;tubing receiving means defined by said inlet and outlet ports; inlet and outlet flexible I.V. tubing in fluid-tight communication with said respective inlet and outlet ports; a compartment defined by said mounting member and positioned coaxially with the line of travel of said plunger member, said compartment having substantially the same geometrical configuration as said base member to accommodate a portion of said base member therein, said mounting member constructed and arranged to position said pump chamber cassette in said compartment at an angle in the range of about 5°
to 10°
from the vertical;tubing holding means operatively associated with said mounting member to position said tubing for contact with said first and second contact members; and a closure member operatively associated with said mounting member presenting anvil surfaces for said contact members and said plunger member. - View Dependent Claims (13)
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Specification