Abstract: Example access devices, treatment devices, and kits useful in performing treatment under magnetic resonance imaging and related methods are described. An example access device includes an elongate tubular member formed of an MRI compatible material and moveable between a first, unexpanded configuration and a second, expanded configuration. The elongate tubular member has a central lengthwise axis, a proximal end, a distal end, an axial length, and a main body that defines a circumferential wall, a lumen, a proximal opening, a distal opening, and a main body opening. The main body opening is arranged in a spiral relative to the lengthwise axis and extends circumferentially along the circumferential wall. The main body opening extends along the entire axial length of the elongate tubular member from the proximal end to the distal end.

Abstract: Example access devices, treatment devices, and kits useful in performing treatment under magnetic resonance imaging and related methods are described. An example access device includes an elongate tubular member formed of an MRI compatible material and moveable between a first, unexpanded configuration and a second, expanded configuration. The elongate tubular member has a central lengthwise axis, a proximal end, a distal end, an axial length, and a main body that defines a circumferential wall, a lumen, a proximal opening, a distal opening, and a main body opening. The main body opening is arranged in a spiral relative to the lengthwise axis and extends circumferentially along the circumferential wall. The main body opening extends along the entire axial length of the elongate tubular member from the proximal end to the distal end.

Abstract: Example tissue removal devices and kits useful in performing treatment under magnetic resonance imaging and related methods are described. An example tissue removal device includes an elongate member and a tubular member partially disposed over the elongate member. The elongate member has a lengthwise axis and a main body that defines a lumen, a proximal portion, a coil member, and a sharp edge. The coil member extends around a portion of the lengthwise axis in a first direction. The coil member extends from the away from the lengthwise axis and away from the proximal portion. The tubular member has a proximal end, a distal end, and a main body that defines a lumen and a slot. The slot extends from the distal end of the tubular member toward the proximal end of the tubular member. The slot is sized to receive a portion of the coil member.