Methods used for peripheral nerve block performance. (A) Methods that anesthesiologists reported using for peripheral nerve localization. (B) The most frequent use of electrical nerve stimulation. (C) Minimal current thresholds (with 0.1 ms impulse duration) normally used by the participants. (x) = participants did not use nerve stimulation. (D) Devices for injection pressure monitoring or injection pressure limitation used during peripheral nerve block performance. (E) Other methods used by the participants for peripheral block performance.