Spiral-Cover Guide Wire for Controlled Septal Puncture

The puncture needle is nested inside the catheter body, which can cover and expose the needle as needed. This nested structure allows the simple mechanical needle design to be safely controlled, preventing erroneous punctures while maintaining manufacturing simplicity and low cost.

The puncture needle is designed to be movable relative to the catheter body, allowing it to be dynamically exposed for puncture and then retracted for safety. This dynamic control enables the use of simple mechanical needles while maintaining high puncture safety through active management of needle exposure.

The puncture needle is pre-positioned inside the catheter body in a covered state before puncture. The operator can then expose the needle only when ready to puncture, preventing erroneous punctures during insertion and navigation while maintaining ease of operation when the needle is exposed.

The catheter body acts as an intermediary between the operator and the puncture needle, providing controlled exposure of the needle. This intermediary structure allows easy puncture operation when needed while preventing erroneous punctures by keeping the needle covered during non-puncture phases.

The bent puncture needle is nested inside the protective catheter body during insertion and navigation. This nested structure protects the needle from damage while maintaining its bent configuration for safety, and allows the needle to be exposed only when safely positioned for puncture.

The catheter body provides beforehand protection for the puncture needle during insertion and navigation through the vascular system. This protective covering prevents damage to the needle from external forces while the needle maintains its safe bent configuration.