| 摘要 |
<p>An apparatus for measuring cardiac output based upon a dilution method. This apparatus comprises a switch for setting parameters such as the outer diameter of a catheter; a probe for detecting the temperature of a liquid indicator to be injected into a blood vessel according to a dilution method; a switch for manually inputting the temperature of the liquid indicator; a circuit for checking whether the probe is attached; a circuit for selectively switching the manually input liquid temperature data and the detected liquid temperature data; a catheter having an opening for admitting the liquid indicator, a first thermistor for measuring the blood temperature diluted with the liquid indicator, and a second thermistor for detecting a thermal equilibrium temperature reached when cooled by the blood; a circuit for detecting a change in the blood temperature detected with the first thermistor and initiating area integration of a dilution curve according to the theory of a dilution method; a circuit for continuously calculating the cardiac output from the thermal equilibrium temperature detected with the second thermistor; and a recording device for recording the continuously obtained cardiac output with time.</p> |
