Patent ID: 7648475

Claim:
A control apparatus for an extracorporeal blood circuit, said extracorporeal blood circuit being connected to a blood purification machine, said extracorporeal blood circuit further comprising an arterial branch connected to at least one blood treatment element and a venous branch connected to at least one blood treatment element, the control apparatus comprising: a non-invasive device for measuring a blood temperature, said non-invasive measuring device comprising: a line fitted in the arterial branch upstream of said blood treatment element for receiving blood from a patient, a temperature sensor connected to said line and generating a first signal indicative of a first blood temperature of the blood flowing in said line, said temperature sensor having an electromagnetic radiation intensity measuring device, and said line having a connecting portion of discoid shape facing said electromagnetic radiation intensity measuring device, said connecting portion being permeable to electromagnetic radiation in a first wave band, said first signal corresponding to an intensity of said electromagnetic radiation in said first wave band, a temperature regulating device for regulating the blood temperature in the extracorporeal blood circuit, said device being connected to a portion of the venous branch downstream from said blood treatment element, and a control unit connected to the temperature regulating device and configured to regulate a blood temperature in the extracorporeal blood circuit as a function of the first blood temperature and a reference temperature.