A medical system comprising: a catheter sheath comprising a first end, a second end and a lumen therebetween; and a device comprising a plurality of elongate members, each elongate member (1704a-f) of the plurality of elongate members comprising a proximal end, a distal end, an intermediate portion positioned between the proximal end and the distal end, and a thickness, each intermediate portion comprising a front surface and a back surface opposite across the thickness of the elongate member (1704a-f) from the front surface, and wherein a portion of the device is selectively moveable between: a first configuration in which at least the respective intermediate portions of the elongate members of the plurality of elongate members are arranged with respect to one another front surface-toward-back surface (1718a, 1718b) in a stacked array sized for delivery through the lumen of the catheter sheath, each elongate member (1704a-f) of the plurality of elongate members arranged to be advanced distal end first out from the lumen of the catheter sheath, and a second configuration in which the respective intermediate portions of at least some of the plurality of elongate members are bent about a respective bending axis into an arcuate stacked array sized too large for delivery though the lumen of the catheter sheath, wherein the device is configured such that, when the portion of the device is moved between the first configuration and the second configuration, the respective distal end of each of the at least some of the plurality of elongate members moves along a respective coiled path as the elongate members advance out of the lumen of the catheter sheath. a catheter sheath comprising a first end, a second end and a lumen therebetween; and a device comprising a plurality of elongate members, each elongate member (1704a-f) of the plurality of elongate members comprising a proximal end, a distal end, an intermediate portion positioned between the proximal end and the distal end, and a thickness, each intermediate portion comprising a front surface and a back surface opposite across the thickness of the elongate member (1704a-f) from the front surface, and wherein a portion of the device is selectively moveable between: a first configuration in which at least the respective intermediate portions of the elongate members of the plurality of elongate members are arranged with respect to one another front surface-toward-back surface (1718a, 1718b) in a stacked array sized for delivery through the lumen of the catheter sheath, each elongate member (1704a-f) of the plurality of elongate members arranged to be advanced distal end first out from the lumen of the catheter sheath, and a second configuration in which the respective intermediate portions of at least some of the plurality of elongate members are bent about a respective bending axis into an arcuate stacked array sized too large for delivery though the lumen of the catheter sheath, wherein the device is configured such that, when the portion of the device is moved between the first configuration and the second configuration, the respective distal end of each of the at least some of the plurality of elongate members moves along a respective coiled path as the elongate members advance out of the lumen of the catheter sheath. a first configuration in which at least the respective intermediate portions of the elongate members of the plurality of elongate members are arranged with respect to one another front surface-toward-back surface (1718a, 1718b) in a stacked array sized for delivery through the lumen of the catheter sheath, each elongate member (1704a-f) of the plurality of elongate members arranged to be advanced distal end first out from the lumen of the catheter sheath, and a second configuration in which the respective intermediate portions of at least some of the plurality of elongate members are bent about a respective bending axis into an arcuate stacked array sized too large for delivery though the lumen of the catheter sheath, wherein the device is configured such that, when the portion of the device is moved between the first configuration and the second configuration, the respective distal end of each of the at least some of the plurality of elongate members moves along a respective coiled path as the elongate members advance out of the lumen of the catheter sheath.