Accurate positioning of detachable coils using alternate electric current. A technical note

Area of Science:

• Medical Devices
• Interventional Radiology
• Biomedical Engineering

Background:

• Detachable coils are crucial for endovascular procedures.
• Current coil positioning methods often rely on visual markers.
• Challenges exist in accurately confirming coil deployment in complex anatomies.

Purpose of the Study:

• To present a new, marker-free method for positioning detachable coils.
• To demonstrate the feasibility of using electrical resistance changes for deployment confirmation.
• To improve the precision and reliability of coil embolization.

Main Methods:

• A novel positioning system for detachable coils was developed.
• The method relies on monitoring the electrical resistance across the coil-microcatheter interface.
• A significant decrease in electrical resistance indicates the platinum-stainless steel junction emerging from the microcatheter tip.

Main Results:

• The new method successfully and accurately positioned detachable coils.
• A distinct decrease in electrical resistance reliably signaled the emergence of the coil junction.
• This approach eliminates the need for external or internal markers for deployment verification.

Conclusions:

• A new, markerless method for detachable coil positioning has been successfully developed.
• The technique leverages changes in electrical resistance for precise deployment confirmation.
• This innovation offers a potentially more reliable and efficient approach to embolization procedures.