Deflection Feedback Assemblies for Catheters and Sheaths

A bidirectional deflectable catheter assembly comprising:

• an elongate catheter shaft comprising a deflectable shaft section;
• a handle coupled to the elongate catheter shaft, the handle comprising:
• a housing;
• a rotatable knob coupled exterior to the housing and operable to deflect the deflectable shaft section;
• and
• a variable resistor configured to vary resistance values upon rotation of the rotatable knob, wherein each resistance value corresponds to a degree of deflection of the deflectable shaft section;
• and
• one or more pull wires coupled to the rotatable knob and extending through the elongate catheter shaft and operable to induce deflection of the deflectable shaft section in towards a first side or a second side with respect to a home position.

A catheter system comprising:

• an elongate catheter shaft comprising a deflectable shaft section;
• a handle coupled the elongate catheter shaft, the handle comprising:
• a housing having a distal end and a proximal end, the distal end being configured to receive the elongate catheter shaft;
• a deflection control coupled to the housing and operable to deflect the deflectable shaft section;
• and
• a deflection feedback assembly disposed within the housing and coupled to the deflection control, the deflection feedback assembly configured to provide output signals indicative of deflection amounts of the deflectable shaft section in response to operation of the deflection control;
• and
• one or more pull wires coupled to the deflection control and extending through the elongate catheter shaft and operable to induce deflection of the deflectable shaft section;
• a connector coupled at the proximal end of the housing and configured to pass one or more cables;
• and
• a controller coupled via the one or more cables of the connector to the handle and a display, the controller configured to determine, based on deflection mapping data and the output signals, the deflection amounts of the deflectable shaft section, the deflection mapping data being a predetermined relationship between the output signals and the deflection amounts.