The term regional anesthesia is identified in base64 scheme by the sequence cmVnaW9uYWwgYW5lc3RoZXNpYQ==, while the MD5 signature is equal to be5ea64f6cad1152a45d5f6743dcaf2a. The ASCII encoding of regional anesthesia in hexadecimal notation is 726567696f6e616c20616e6573746865736961.