A rescue apparatus has a cuff member, an inflatable bladder affixed to the cuff member, a gas line affixed to the cuff member so as to be in fluid communication with the bladder, and a gas canister affixed to the cuff member in valved fluid communication with the bladder. The storage stores a plurality of selection signals for specifying a priority order against a number N of requests. The first anchor is transmitted to a computer remote from the first location. The predetermined period is an interval where at least two wobble signal data samples are obtained. The processor judges the presence or absence of an image reading report corresponding to the medical image displayed on the monitor, and restricts a change of the medical image in a case where the image reading report is judged as being absent. One of inputs is connected to one input of the current balancing circuit, other inputs are connected to outputs of the current balancing circuit, and the output outputs a fault signal.