What is the definition or description of: regional anesthesia?

See below: Regional anaesthesia (or regional anesthesia) is anaesthesia affecting a large part of the body, such as a limb or the lower half of the body. Regional anaesthetic techniques can be divided into central and peripheral techniques. The central techniques include so called neuraxial blockade (epidural anaesthesia, spinal anaesthesia).

Regional anesthesia: A regional anesthetic (spinal, epidural, extremity block) is anesthetizing a region of the body using local anesthetic. Surgery may be done under regional anesthesia with or without accompanying sedation.

Regional anesthesia: The injection of a local anesthetic adjacent to a nerve in order to temporarily, partially or completely block sensory, motor or sympathetic conduction for the purpose of performing a procedure or alleviating pain.

Nerve block: Regional anesthesia usually implies that a nerve block is done. That means that all the areas that are supplied by this nerve or group of nerves will be numb.

See below: The injection of local anesthetics around a nerve fiber to provide numbness to a specific area of the body.