What is the preferred method for performing a digital nerve block?

The preferred method for performing a digital nerve block involves injecting into the web space just distal to the metacarpophalangeal (MCP) joint. This technique is favored because it allows for effective anesthesia of the digital nerves that run along the sides of the fingers. The anatomical location of the digital nerves makes this approach optimal, as it provides direct access to the nerves without damaging surrounding tissues, reducing the risk of complications.

By injecting in the web space, the anesthetic can spread around both digital nerves, providing complete anesthesia to the entire finger. This is crucial for procedures requiring analgesia for digit surgeries or repair. Proper placement and technique ensure that the anesthetic solution can diffuse adequately to cover all areas of the affected digit.

Other methods, like injecting at the base of the finger or directly into the middle phalanx, do not provide the same level of efficacy and completeness due to anatomical considerations and the pattern of nerve distribution. Injecting into the palmar surface may not adequately reach both nerves, leading to insufficient anesthesia. Thus, the web space injection is the optimal choice in achieving a successful digital nerve block.