Patent ID: 8920355

Claim:
An access disconnection method for a blood treatment machine comprising: supporting (i) a transmitter including a wireless communication apparatus, (ii) a receiver, (iii) a portion of an arterial line, (iv) a portion of a venous line and (v) electronic circuitry by a member separate from the blood treatment machine; operably communicating the electronic circuitry with the transmitter and the receiver; enabling transmission of a wave from the transmitter in one of the arterial or venous lines; enabling receipt of the wave by the receiver in the other of the arterial or venous lines; and enabling a disconnection output to be sent to the blood treatment machine via the electronic circuitry, wherein the disconnection output is indicative of a change in the wave received by the receiver from the transmitter sufficient to expect that an access site disconnection of one of the arterial or venous lines has occurred.