| 摘要 |
<p>A circulation device, wherein bubbles which are small in volume can be detected with high precision. The present invention is a circulation device which circulates the blood of a subject extracorporeally using a circulation circuit, and which is equipped with a bubble sensor, a calculation means for calculating the variance per unit of time of a signal output by the bubble sensor, an extraction means for extracting the period of time from when the variance per unit of time calculated by the calculation means exceeds a first reference value until the variance drops below a second reference value, and an assessment means for assessing as a bubble each of the level changes included in the signal output by the detection means over the period of time extracted by the extraction means.</p> |
