Liquid concentration detector for a blood purification apparatus

摘要

A blood purification apparatus includes a blood purification instrument for extracorporeally circulating blood of a patient and a concentration detector detecting a concentration of liquid flowing during blood purification. The concentration detector has a light emitter irradiating light onto said liquid, a light receiver receiving light from the light emitter transmitted through said liquid, and a detector detecting the received light intensity received by the light receiver. The concentration detector detects the concentration of the liquid based on the received light intensity and can be calibrated by adjusting an amount of irradiation by the light emitter so that the received light intensity has a predetermined value.

主权项

1. A blood purification apparatus comprising:
a blood purification instrument for extracorporeally circulating blood of a patient; and a concentration detector for detecting a concentration of liquid flowing during blood purification, the liquid including a dialysate and the blood of the patient, the concentration detector comprising:
a light emitter configured to irradiate the liquid with light,a light receiver configured to receive the light from the light emitter transmitted through the liquid, anda detector configured to detect intensity of the light received by the light receiver, the concentration of the liquid being determined based on the intensity of the received light, and a controller programmed to perform calibration of the concentration detector before the blood purification instruction starts circulating the blood of the patient, in which the controller is programmed to supply only the dialysate to the concentration detector to adjust an amount of light emission from the light emitter so that the intensity of the received light has a predetermined value, wherein when the controller determines that the intensity of the received light is greater than a predetermined value, the controller controls the light emitter to reduce the amount of the light emission, and when the controller determines that the intensity of the received light is smaller than the predetermined value, the controller controls the light emitter to increase the amount of the light emission.