Real-Time Monitoring of the Injection Pressure During the Peripheral Nerve Block

Inclusion Criteria: * Informed Consent signed by the subject * Age ≥ 18 years * Scheduled for elective surgery below the elbow (e.g., hand surgery, distal radius surgery, forearm surgery) requiring an axillary block * ASA physical status I-III * Ability to understand the investigation * Ability and willingness to follow and complete the procedures of the investigation Exclusion Criteria: * Contraindications to the axillary block (e.g., local infection) * Refusal of locoregional anesthesia for the surgical procedure * Pre-existing neurologic deficits in the operative extremity * Body Mass Index ≥ 35 kg/m2 * Known allergy to local anesthetic (mepicavaine hydrochloride) * Inability to comply with post-operative evaluations e.g. due to language problems, psychological disorders, dementia, etc. of the subject