System for sensing a characteristic of fluid flowing to or from a body
First Claim
1. For use in a cardiovascular flow measuring system wherein a cold injectate fluid is delivered in a known amount from a supply through a catheter into a patient'"'"'s blood vessel and the resultant change in the temperature of the patient'"'"'s blood is sensed to determine the circulatory blood flow rate, an improved injectate fluid temperature sensor comprising:
- a disposable housing defining a through lumen for conducting injectate fluid therethrough;
a disposable thermally conductive receiver hermetically sealingly joined to the housing and projecting transversely into said lumen to be in heat transfer association with injectate fluid conducted through said lumen, said receiver extending substantially fully across said lumen; and
a reusable temperature sensor removably installed in said enclosure, said sensor providing a signal corresponding accurately to the temperature of the injectate fluid conducted through said lumen.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for sensing a characteristic of fluid flowing to or from the body of a human or a comprising a conduit having a first end adapted to be outside the body, a second end adapted to be received within the body, and a flow passage through which fluid can flow between the first and second ends and a probe including a sensor for sensing a characteristic of the fluid. The probe is mounted on the conduit with the sensor in the flow passage. The sensor is isolated from the fluid flowing in the flow passage.
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Citations
25 Claims
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1. For use in a cardiovascular flow measuring system wherein a cold injectate fluid is delivered in a known amount from a supply through a catheter into a patient'"'"'s blood vessel and the resultant change in the temperature of the patient'"'"'s blood is sensed to determine the circulatory blood flow rate, an improved injectate fluid temperature sensor comprising:
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a disposable housing defining a through lumen for conducting injectate fluid therethrough;
a disposable thermally conductive receiver hermetically sealingly joined to the housing and projecting transversely into said lumen to be in heat transfer association with injectate fluid conducted through said lumen, said receiver extending substantially fully across said lumen; and
a reusable temperature sensor removably installed in said enclosure, said sensor providing a signal corresponding accurately to the temperature of the injectate fluid conducted through said lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for sensing a characteristic of fluid flowing to or from the body of a human or animal, said system comprising:
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a conduit having a first end adapted to be outside the body, a second end adapted to be received within the body, and a flow passage through which fluid can flow between the first and second ends;
a probe including means for sensing a characteristic of the fluid;
a receiver projecting into said flow passage, said receiver having a receiver passage opening to the exterior of said conduit for receiving at least the sensing means of said probe, said receiver passage being sealed from the fluid in the flow passage, said receiver being irremovable attached to said conduit, said receiver extending substantially completely across said flow passage; and
means for mounting the probe on the conduit with said sensing means in said receiver passage whereby the probe can sense said characteristic of the fluid in the conduit. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An injectate delivery system for delivering an injectate to the body of a human or animal, said system comprising:
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a conduit having an inlet for receiving the injectate, an outlet through which the injectate can be delivered to the body, and a flow passage through which the injectate can flow from the inlet to the outlet;
a probe including means for making a temperature measurement;
a receiver projecting in said flow passage, said receiver having a receiver passage opening to the exterior of said conduit for receiving at least the temperature measuring means of said probe, said receiver passage being sealed from the injectate in the flow passage, said receiver being irremovable attached to said conduit, and said receiver extending substantially completely across said flow passage; and
means for mounting the probe on the conduit with said temperature measuring means in said receiver passage whereby the probe can measure the temperature of the injectate in the conduit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification