Abstract: A device for use in a process that involves accessing a bodily space includes a flexible tube having a proximal end, a distal end, and a channel extending between the proximal and distal ends of the flexible tube, and a tissue engagement device coupled to the distal end of the flexible tube, wherein the tissue engagement device comprises a body with threads and a port located on the body, the port being in fluid communication with the channel of the flexible tube.

Abstract: 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.

Abstract: A device for use in a process that involves accessing an epidural space includes an elongated member having a distal end and a proximal end, a sensor located at the distal end of the elongated member, a handle coupled to the proximal end of the elongated member, and an indicator coupled to the sensor, wherein the indicator is configured to provide a sensory indication for assisting a user to identify a desired entry path to access an epidural space, wherein the indicator is configured to provide the sensory indication based at least in part on a signal received from the sensor.