A method and device for monitoring cardiac output

Abstract

The invention discloses a cardiac output monitoring method. The cardiac output monitoring method includes a heating process and a monitoring process. In the heating process, a thermal resistor on a float catheter is used for heating. In the monitoring process, a dual processor is used for limiting the heating process bilaterally and synchronously, and if any abnormality is detected by the dual processor, measurement is stopped. The invention further provides a cardiac output monitoring device. In an embodiment of the cardiac output monitoring device, since the dual processor is used for limiting the heating process bilaterally and synchronously in the monitoring process, if any abnormality is detected by the dual processor, measurement is stopped. The cardiac output monitoring method and the cardiac output monitoring device have the advantages that by means of adopting a mechanism capable of limiting flow and time and monitoring dually on the basis of heating and controlling mechanisms, and combining voltage control and heating time control to guarantee safety in heating, safety is guaranteed by bilateral synchronous heating limiting measures, accuracy of cardiac output monitoring and safety during application are improved remarkably, and periodic monitoring can be achieved.

Description

technical field [0001] The present application relates to medical devices, in particular to a method and device for monitoring cardiac output. Background technique [0002] One of the important parameters of the physiological activities of the human body is the cardiac output, which reflects the important parameters of the human heart function. There are many ways to measure the cardiac output. The puncture is placed in the atrium of the heart), and a certain amount of ice water is injected through the floating catheter, and then the intermittent measurement of cardiac output is realized with the help of a cardiac output measuring instrument. This method is the current gold standard method for measuring cardiac output. . Usually, the thermodilution method uses a floating catheter and inserts it into the heart (atrium and pulmonary artery) through a vein, and then injects a certain amount of ice saline (or normal saline at room temperature) through the injection port of the ...

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Problems solved by technology

[0005] In recent years, a heating method has been developed to achieve injection similar to ice water. The heating resistance of the floating catheter is used to achieve rapid heating, and the measurement of cardiac output can also be realized. Since this heating is controllable, it can be better, And continuously realize the monitoring of cardiac output, but because the measurement of cardiac output requires rapid heating to the sensor part placed in the ventricle, increasing the local temperature rise, the temperature rise is usually less than 1 degree Celsius, but due to Sensor failure may cause the temperature to rise by more than 2 degrees Celsius and cause harm. The conventional method is to carry out real-time temperature and limit the heating time. These measures are still not enough to overcome the harm caused by the temperature rise of more than 2 degrees Celsius due to failure.

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