Patent ID: 8535522

Claim:
A dialysis system having a disconnection monitor for determining if a blood line connection to a patient has been disconnected, comprising: a. A blood circuit in fluid communication with a patient and a dialysis circuit; b. A pressure transducer in pressure communication with said blood circuit wherein said pressure transducer generates a signal indicative of a pulse signal in said blood circuit; c. A cardiac reference signal generator, wherein said cardiac reference signal generator detects and generates a signal indicative of said patient's pulse; d. The disconnection monitor comprising: i. A pressure transducer data receiver, wherein said pressure transducer data receiver receives said signal indicative of the pulse signal in said blood circuit; ii. A cardiac reference signal receiver, wherein said cardiac reference signal receiver receives said signal indicative of the patient's pulse; and iii. A processor, wherein said processor cross-correlates said signal indicative of the pulse signal in said blood circuit and said signal indicative of the patient's pulse to generate data indicative of a disconnection of the blood line connection to the patient.