Deflectable stylet

A catheter assembly, including:

• a handle having a handle body;
• an electrode sheath extending from a distal end of the handle body, the electrode sheath defining a lumen;
• and
• a deflectable stylet arranged within the lumen of the electrode sheath, wherein the deflectable stylet includes:
• an elongate deflectable member with a bend-enhancing region defined at a distal part of the elongate deflectable member;
• an actuator having a distal end fast with a distal end of the elongate deflectable member, relative displacement between the actuator and the elongate deflectable member causing deflection of the distal part of the elongate deflectable member at the bend-enhancing region;
• a control member axially displaceable relative to the elongate deflectable member, wherein the control member inhibits bending of a longitudinally overlapping portion of the bend-enhancing region, wherein axial displacement of the control member controls the extent of longitudinal overlap between the control member and the bend-enhancing region;
• and
• a deflection control mechanism connectable to a proximal end of the handle, the deflection control mechanism being coupled to the control member thereby to control axial displacement of the control member relative to the elongate deflectable member, the deflection control mechanism being additionally coupled to the actuator, wherein the deflection control mechanism is configured to be selectively detachable from and re-attachable with the proximal end of the handle, and the deflection control mechanism further comprises:
• a mounting formation mounting one of the elongate deflectable member and the actuator to the deflection control mechanism;
• and
• an anchoring formation anchoring the other of the elongate deflectable member and the actuator to the deflection control mechanism, wherein the mounting formation is displaceably arranged relative to the deflection control mechanism and the anchoring formation during use of the deflectable stylet.

A deflectable stylet for a catheter, the deflectable stylet including:

• an elongate deflectable member with a bend-enhancing region defined at a distal part of the elongate deflectable member;
• an actuator having a distal end fast with a distal end of the elongate deflectable member, relative displacement between the actuator and the elongate deflectable member causing deflection of the distal part of the elongate deflectable member at the bend-enhancing region;
• a control member axially displaceable relative to the elongate deflectable member, wherein the control member inhibits bending of a longitudinally overlapping portion of the bend-enhancing region, wherein axial displacement of the control member controls the extent of longitudinal overlap between the control member and the bend-enhancing region;
• and
• a deflection control mechanism connectable to a proximal end of a catheter handle of the catheter, the deflection control mechanism being coupled to the control member thereby to control axial displacement of the control member relative to the elongate deflectable member, the deflection control mechanism being further coupled to the actuator, a distal end of the deflection control mechanism including a first pair of mounting pins removably fastenable with a pair of complementary L-shaped slots at the proximal end of the catheter handle;
• and
• a mounting formation displaceably coupled to the distal end of the deflection control mechanism, the mounting formation comprising a second pair of mounting pins configured to be coupled to a displaceable slide of the catheter handle, wherein the slide is operatively joined to a displacement control knob displaceably arranged on the catheter handle, and the displacement conrol knob is configured to axially displace the mounting formation.