The term spinal anesthesia is identified in base64 scheme by the sequence c3BpbmFsIGFuZXN0aGVzaWE=, while the MD5 signature is equal to 422f5b9eeddca57e35a42b36789c3d1f. The ASCII encoding of spinal anesthesia in hexadecimal notation is 7370696e616c20616e6573746865736961.