A cryosurgery system, comprising: a first cryoprobe and a second cryoprobe, the first cryoprobe and the second cryoprobe each including: a probe shaft having a distal section insertable in a patient, each probe shaft comprising an electrically-conductive material and configured to receive a cryofluid for cooling and/or freezing the patient's tissue, and a proximal coupler at least a portion of the proximal coupler being electrically conductive, the proximal coupler being in electrical communication with the probe shaft; a first connection port being configured to receive and connect to the proximal coupler of the first cryoprobe; a second connection port being configured to receive and connect to the proximal coupler of the second cryoprobe; and at least one electrical isolator the first connection port and the second connection port each being fluidly connected to a cryofluid supply line for receiving the cryofluid from a cryofluid source and delivering the cryofluid to the proximal coupler of the first cryoprobe and the proximal coupler of the second cryoprobe respectively; the electrically conductive portion of the proximal coupler of the first cryoprobe being insertable into the first connection port, and the electrically conductive portion of the proximal coupler of the second cryoprobe being insertable into the second connection port; the at least one electrical isolator being configured to electrically isolate the proximal coupler of the first cryoprobe from the proximal coupler of the second cryoprobe such that the probe shaft of the first cryoprobe is substantially electrically isolated from the probe shaft of the second cryoprobe; the electrical isolator providing complete electrical insulation between the electrically conductive portion of at least one proximal coupler and a corresponding connection port into which the at least one proximal coupler is inserted, the corresponding connection port being the first connection port or the second connection port. a first cryoprobe and a second cryoprobe, the first cryoprobe and the second cryoprobe each including: a probe shaft having a distal section insertable in a patient, each probe shaft comprising an electrically-conductive material and configured to receive a cryofluid for cooling and/or freezing the patient's tissue, and a proximal coupler at least a portion of the proximal coupler being electrically conductive, the proximal coupler being in electrical communication with the probe shaft; a first connection port being configured to receive and connect to the proximal coupler of the first cryoprobe; a second connection port being configured to receive and connect to the proximal coupler of the second cryoprobe; and at least one electrical isolator the first connection port and the second connection port each being fluidly connected to a cryofluid supply line for receiving the cryofluid from a cryofluid source and delivering the cryofluid to the proximal coupler of the first cryoprobe and the proximal coupler of the second cryoprobe respectively; the electrically conductive portion of the proximal coupler of the first cryoprobe being insertable into the first connection port, and the electrically conductive portion of the proximal coupler of the second cryoprobe being insertable into the second connection port; the at least one electrical isolator being configured to electrically isolate the proximal coupler of the first cryoprobe from the proximal coupler of the second cryoprobe such that the probe shaft of the first cryoprobe is substantially electrically isolated from the probe shaft of the second cryoprobe; the electrical isolator providing complete electrical insulation between the electrically conductive portion of at least one proximal coupler and a corresponding connection port into which the at least one proximal coupler is inserted, the corresponding connection port being the first connection port or the second connection port.