A lead anchor includes a body defining at least one first portion of a lead lumen, the body having a first opening and a second opening. An obstructing member is disposed within the body. The obstructing member defines a second portion of the lead lumen. A spring is disposed in the body and configured and arranged to operate on the obstructing member so that the second portion of the lead lumen is coterminous with the at least one first portion of the lead lumen and forms a continuous lead path when the spring is compressed and the second portion of the lead lumen is offset from the at least one first portion of the lead lumen when the spring is not compressed.