An apparatus for accessing the epidural space in a mammal has a cutting
sheath with a distal end adapted to transition from a closed cutting
configuration to an open configuration. A tissue engagement device is in
a hollow portion of the sheath. The tissue engagement device has a blunt
distal end and an engagement feature. A method of accessing an epidural
space includes the step of forming an opening to a position at or near
the ligamentum flavum using the cutting sheath. Another step of the
method is positioning a tissue engagement device within the hollow
portion of the cutting sheath. Another step of the method is
transitioning the cutting sheath from the closed cutting configuration to
the open configuration. Another step of the method is manipulating the
tissue engagement device to controllably advance the tissue engagement
device at least partially through the ligamentum flavum.