Patent ID: 7959593

Claim:
A blood purification apparatus capable of blood purifying treatment comprising: a blood circuit provided with an arterial blood circuit and a venous blood circuit, to which needles to be connected to an access blood vessel of a patient can be attached at corresponding arterial and venous ends thereof, and in which blood of the patient is circulated extracorporeally; a blood purifying device connected between the arterial circuit and the venous circuit and configured to purify blood flowing in the blood circuit; a driving device configured to drive a patient's blood in the arterial blood circuit in a same forward direction as that in a blood purifying treatment; a pump configured to drive a patient's blood in the venous blood circuit in a reverse direction as that in the blood purifying treatment after a priming operation which fills the blood circuit with a priming solution while the needles are attached to the ends of the arterial blood circuit and the venous blood circuit; an arterial air bubble detection device proximate to the arterial end of the blood circuit and configured to detect air bubbles in liquid flowing in the arterial blood circuit driven by the driving device; a venous air bubble detection device proximate to the venous end of the blood circuit and configured to detect air bubbles in the liquid flowing in the venous blood circuit driven by the pump; an arterial blood detector proximate to the arterial end of the blood circuit and configured to detect blood in the liquid flowing in the arterial blood circuit; a venous blood detector proximate to the venous end of the blood circuit and configured to detect blood in the liquid flowing in the venous blood circuit; and a connection condition evaluation device electrically connected to each of the arterial and venous air bubble detection devices and to each of the arterial and venous blood detectors, and configured to evaluate connection conditions of each of the arterial and venous needles to the corresponding ends of the arterial blood circuit and the venous blood circuit based on an evaluation of the state of each air bubble detection device and each blood detector.