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lüll Orthopaedic anesthesia - part 2 Common techniques of regional anesthesia in orthopaedics Latifzai K; Sites BD; Koval KJBull NYU Hosp Jt Dis 2008[]; 66 (4): 306-16Anesthesia may be considered in terms of two categories: general and regional. The aim of general anesthesia is to induce analgesia, sedation, amnesia, suppression of autonomic reflexes, and relaxation of muscles. Regional anesthesia is more site-specific and is typically divided into three categories based on the location of injection: 1. a central neuraxial block is an injection of an anesthetic drug into the epidural or intrathecal space; 2. a peripheral nerve block is an injection near the nerve or plexus supplying the area under operation; and 3. a field block is an injection into the adjoining tissues with subsequent diffusion into the surgical area (in orthopaedics, it is typically employed for minor procedures of the hand or foot). Of these three categories of regional anesthesia (i.e., neuraxial, peripheral, and field blocks), this article focuses on the latter two. Although neuraxial blocks comprise an important part of regional anesthesia, they are typically performed by anesthesiologists in an operative setting for major procedures of the lower extremities. The intent of this article is to familiarize the orthopaedist with techniques that have implications for emergency rooms and other ambulatory settings in which regional techniques are sometimes favored over general alternatives because they entail less risk of systemic side effects and may involve more cost-effective use of resources.|*Nerve Block[MESH]|*Orthopedic Procedures[MESH]|Anesthesia, Conduction/*methods[MESH]|Humans[MESH]|Lower Extremity/innervation[MESH]|Upper Extremity/innervation[MESH] |