Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1994-09-02
1997-06-03
Bennett, G. Bradley
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374164, G01K 716
Patent
active
056347200
ABSTRACT:
A multi-lumen, multi-purpose cardiac catheter which incorporates optical filaments and an optical coupler for use with external apparatus for determining the oxygen concentration in the blood of a patient under critical care conditions, as well as incorporating therein a thermal element useable with a second external apparatus for measurement of continuous cardiac output. A thermal plug provides an interface between a temperature control apparatus and the thermal element to simply and accurately monitor and control the temperature of the thermal element. A temperature monitoring circuit in the thermal plug facilitates temperature measurement at the thermal element. The catheter also includes a thermistor and at least one injectate port for enabling the user to also conduct thermal dilution readings and obtain intermittent measurements of cardiac output. The combination of a thermal dilution catheter with a SV0.sub.2 catheter and a continuous cardiac output catheter gives the multi-purpose catheter above described substantial versatility as well as providing the user with a versatile cardiac catheter device which enables him to conduct multiple evaluations of disparate blood-related parameters which require the use of separate apparatus. Simply by switching from one external apparatus to the other, the user can obtain readings for different blood-related parameters useful in the treatment of the cardiac patient.
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Gallup David A.
Hughes Timothy J.
Abbott Laboratories
Bennett G. Bradley
Hannum David C.
Thibault Harry G.
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