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 Title: |
US5180896:
System and method for in-line heating of medical fluid
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Gibby, Gordon L.; Gainesville, FL
Lampotang, Samsun; Gainesville, FL
Hathiram, Daraius; Houston, TX
Gravenstein, Nikolaus; Gainesville, FL
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| Assignee: |
University of Florida, Gainseville, FL
other patents from UNIVERSITY OF FLORIDA (678945) (approx. 657)
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| Published / Filed: |
1993-01-19
/ 1990-10-11
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| Application Number: |
US1990000595472
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| IPC Code: |
Advanced:
G05D 23/27;
H05B 6/68;
Core:
more...
IPC-7:
H05B 6/64;
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| ECLA Code: |
H05B6/68M2B3A; G05D23/27; T05B206/02; T05B206/12; T05B206/76;
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| U.S. Class: |
Current:
219/687;
219/710;
219/711;
604/113;
606/033;
606/034;
606/042;
607/106;
Original:
219/010.55A;
219/010.55F;
219/010.55R;
128/399;
128/804;
604/113;
606/033;
606/034;
606/042;
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| Field of Search: |
219/10.55 A,10.55 R,10.55 B,10.55 M
128/400,401,402,399,804,635,636,637
604/113,52,114
374/032,116,122,132
606/033,34,42
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| Priority Number: |
| 1990-10-11 |
US1990000595472 |
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| Abstract: |
The heating of blood or other medical fluids supplied to a patient is provided by a system and method of feedback control. The temperature of the blood is sensed by receiving infrared energy from the medical fluid as it flows within a sterile and disposable tube from a fluid source to the patient. Feedback control stabilizes the temperature at a desired value. A second sensor may optionally be used to determine if the fluid is too hot within the microwave device itself. The disposable tube has at least one window or thin membrane portion which allows infrared radiation to pass therethrough in order to be sensed by the sensor. One arrangement of the present invention uses a microprocessor with adaptive control to provide precise and accurate control of the temperature of the medical fluid.
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| Attorney, Agent or Firm: |
Kerkam, Stowell, Kondracki & Clarke ;
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| Primary / Asst. Examiners: |
Reynolds, Bruce A.; To, Tuan Vinh
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| Maintenance Status: |
E2 Expired Check current status
CC Certificate of Correction issued
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 3 claims |
What is claimed is:
1. A system for in-line heating of medical fluids supplied to a patient comprising:
- a heating apparatus for radiant heating by electromagnetic radiation including a source of electromagnetic radiation, a housing and a zone for heating within said housing, said housing having an inlet for entry of medical fluids into said zone while said source is generating electromagnetic radiation and an outlet for exit for medical fluids while said source is generating electromagnetic radiation for heating medical fluids flowing in a path between said inlet and outlet;
- a first sensor for sensing the temperature at a first location of medical fluid heated by said heating apparatus and generating a first output representative of sensed temperature, said first sensor sensing temperature by receiving optical waves of energy;
- a controller for receiving said first output and providing feedback control of said source to minimize differences between the sensed temperature of the medical fluid and a desired temperature for the medical fluid; and
- a tube for carrying medical fluid therein at least in said zone between said inlet and said outlet and defining said path, said first sensor sensing temperature by nonconductively sensing infrared energy from the medical fluid, at least some of which has passed through at least part of said tube, from at least one of said tube and the medical fluid at said first location for sensing temperature of medical fluid within said tube, said first location being within said tube, said first sensor being separate from said tube, and said tube including a thin membrane portion to allow infrared energy to pass therethrough to said first sensor.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 83 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other References: |
"Preventing Hypothermia in Trauma Patients by Microwave Warming of IV Fluids", J. Antonio Aldrete, pp. 435-442, Nov. 14, 1985.
"Rapid Controlled Thawing of Fresh-Frozen Plasma in a Modified Microwave Oven", Rock et al, pp. 60-65, Mar. 31, 1983.
"Testing of a New In-Line Blood Warmer", Linko, pp. 445-446, 1980.
(2 pages)
"Erythrocyte Damage Caused by the Haemotherm Microwave Blood Warmer", Linko and Hynynen, pp. 320-328, 1979.
(9 pages)
Cited by 3 patents
"Influence of the Taurus Radiowave Blood Warmer on Human Red Cells", K. Linko and R. Hekali, pp. 46-52, 1980.
(7 pages)
"Radiowave and Microwave Blood Warmers: Comparison with Water Bath Blood Warming Units", Hamid Dalili et al, Southern Medical Journal, Nov. 1973, vol. 66, No. 11, pp. 1254-1259.
(6 pages)
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