A steerable stylet assembly (10) includes a tubular member (12) defining a passage (14), the tubular member (12) defining a first bend enhancing (16). At least one further bend enhancing region (20) is arranged intermediate the first bend enhancing region (16) and the distal end (18) of the tubular member (12). A first actuator (26) is received in the passage (14) of the tubular member (12), a distal end of the first actuator (26) being fast with the tubular member (12) at a first termination (30) so that relative axial movement between the tubular member (12) and the first actuator (26) causes deflection at the first enhancing region (16). A second actuator (24) is received in the passage (14) of the tubular member (12), a distal end of the second actuator (24) being fast with the tubular member (12) at a second termination so that relative axial movement between the tubular member (12) and the second actuator (24) causes the distal part of the tubular member (12) to be formed into a desired shape. The assembly (10) includes a control mechanism (32) to control relative axial movement between the tubular member (12) and each of the actuators (24, 26).
