Described herein are bend-limited catheters (e.g., apparatuses, including devices and systems) and methods of using them. These apparatuses may include an elongate tubular body that has one or more cut-out kerfs forming a pattern of interlocking teeth that are arranged in rings (and/or one or more spiral patterns) around the perimeter of the elongate tubular body. The pattern of interlocking teeth is configured to provide the catheter with a high degree of flexibility in bending, while permitting the device to lock at a locking diameter when the catheter bends to a minimum locking angle, beyond which no further bending is permitted.
