A system for performing injections which comprises: an injection catheter having a proximal end and a distal end, and defining a longitudinal axis; a flexible array; a needle; characterised in that: the flexible array has a distal end and a proximal end, and the array is mounted at the distal end of the injection catheter, with the distal end of the array being retractable in a proximal direction to reconfigure the array from a protective configuration wherein the array is substantially cylindrical shaped and is aligned with the axis of the injection catheter, to a flared configuration wherein the array is substantially disk-shaped and lies in a plane substantially perpendicular to the axis to abut against tissue during an injection; and the needle is mounted on the distal end of the injection catheter and covered by the flexible array when the array is in its protective configuration and exposed when the array is in its flared configuration; and further comprising a locking mechanism mounted on the proximal end of the injection catheter for engagement with the flexible array at the distal end of the injection catheter, wherein the locking mechanism is selectively manipulable to release the array from its protective configuration to the flared configuration, and to thereafter hold the array in its flared configuration for an injection and to subsequently move the flexible array from its flared configuration to its protective configuration. an injection catheter having a proximal end and a distal end, and defining a longitudinal axis; a flexible array; a needle; characterised in that: the flexible array has a distal end and a proximal end, and the array is mounted at the distal end of the injection catheter, with the distal end of the array being retractable in a proximal direction to reconfigure the array from a protective configuration wherein the array is substantially cylindrical shaped and is aligned with the axis of the injection catheter, to a flared configuration wherein the array is substantially disk-shaped and lies in a plane substantially perpendicular to the axis to abut against tissue during an injection; and the needle is mounted on the distal end of the injection catheter and covered by the flexible array when the array is in its protective configuration and exposed when the array is in its flared configuration; and the flexible array has a distal end and a proximal end, and the array is mounted at the distal end of the injection catheter, with the distal end of the array being retractable in a proximal direction to reconfigure the array from a protective configuration wherein the array is substantially cylindrical shaped and is aligned with the axis of the injection catheter, to a flared configuration wherein the array is substantially disk-shaped and lies in a plane substantially perpendicular to the axis to abut against tissue during an injection; and the needle is mounted on the distal end of the injection catheter and covered by the flexible array when the array is in its protective configuration and exposed when the array is in its flared configuration; and further comprising a locking mechanism mounted on the proximal end of the injection catheter for engagement with the flexible array at the distal end of the injection catheter, wherein the locking mechanism is selectively manipulable to release the array from its protective configuration to the flared configuration, and to thereafter hold the array in its flared configuration for an injection and to subsequently move the flexible array from its flared configuration to its protective configuration.