Optical pressure monitoring system
First Claim
Patent Images
1. An adapter for disposition along an infusion set, the adapter comprising:
- a pumping tube for engaging a pump rotor;
a first connector for attaching an upstream portion of an infusion set to one end of the tube;
a second connector for attaching a downstream portion of an infusion set to a second end of the tube, the second connector being attached to the first connector; and
an abutment member disposed adjacent to the first connector and the second connector, the abutment member contacting the tube so as to deflect a portion of the tube into a nonlinear position, the abutment member engaging one side of said tube without engaging the other side of said tube such that the other side of the tube is not contacted and is unconstrained so as to permit the other side of said tube to expand due to pressure within the tube.
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Accused Products
Abstract
An optical pressure monitoring system includes a tube from an infusion set and an optical signal sensor disposed to detect changes in the diameter of the tube and thereby determine pressure changes within the tube. By selecting the position of the tube relative to the optical signal emitter and optical signal receiver, the optical signal sensor can both detect pressure changes and provide an integrity check for both the functioning of the optical signal sensor and the placement of the tube. By modifying the tube to exaggerate changes in tube diameter responsive to pressure changes, the sensitivity of the optical signal sensor can be increased.
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Citations
18 Claims
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1. An adapter for disposition along an infusion set, the adapter comprising:
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a pumping tube for engaging a pump rotor; a first connector for attaching an upstream portion of an infusion set to one end of the tube; a second connector for attaching a downstream portion of an infusion set to a second end of the tube, the second connector being attached to the first connector; and an abutment member disposed adjacent to the first connector and the second connector, the abutment member contacting the tube so as to deflect a portion of the tube into a nonlinear position, the abutment member engaging one side of said tube without engaging the other side of said tube such that the other side of the tube is not contacted and is unconstrained so as to permit the other side of said tube to expand due to pressure within the tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An adapter for an infusion set comprising:
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a resilient tube; a first connector attached to a first end of the resilient tube and to an upstream portion of an infusion set; a second connector attached to a second end of the resilient tube and to a downstream portion of an infusion set; and an abutment member, the abutment member being located to engage one side of a section of the resilient tube and not the opposing side of the section of resilient tube so as to deflect the section of resilient tube into a non-linear position, wherein the resilient tube is placed in tension and held against the abutment member, wherein said opposing side of said section of resilient tube is free to expand and contract due to changes in pressure, and wherein the section of resilient tube is placed between an optical emitter and an optical detector to thereby detect changes in diameter of the section of resilient tube due to pressure. - View Dependent Claims (14)
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15. An adapter for an infusion set comprising:
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a resilient tube; first and second positioning devices for holding first and second portions of the resilient tube so as to define a length of resilient tube therebetween; and an abutment member located between the first and second positioning devices, the abutment member contacting one side of a section of the resilient tube without contacting an opposing side of the section of resilient tube so as to deflect the length of tube into a non-linear position whereby the resilient tube is placed in tension and held against the abutment member, wherein said opposing side of the section of resilient tube is unconstrained so as to allow said section of resilient tube to expand and contract due to pressure changes, and wherein said section of resilient tube is placed between an optical emitter and an optical detector such that changes in diameter of the resilient tube result in changes in light transmission between the optical emitter and optical detector. - View Dependent Claims (16)
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17. An adapter for disposition along an infusion set, the adapter comprising:
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an elastomeric tube for engaging a pump to pump fluids therethrough; a first connector attached to an upstream portion of an infusion set and attached to a first end of said elastomeric tube; a second connector attached to a downstream portion of said infusion set and attached to a second end of said elastomeric tube; an abutment member disposed adjacent to the first connector and the second connector, the abutment member being configured for deflecting a portion of the elastomeric tube into a nonlinear position, the abutment member engaging one side of said tube without engaging the other side of said tube such that the other side of the tube is not contacted and is unconstrained so as to permit the other side of said tube to expand due to pressure within the tube; and wherein expansion or contraction of the side of the tube not in contact with the abutment member is detected as a change of pressure within the tube. - View Dependent Claims (18)
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Specification