Kabushiki Kaisha Cardio-Pacing Research Laboratory

Fuminori Tsuboi

Kunimasa Katayama

Katsuhiro Shirakawa

In order to increase durability against repeated flexure caused in a body tissue or flexure having a very small radius of curvature, and to reduce mechanical stress applied by a lead body on the body tissue, a lead body (,) of an implantable electrode lead is constituted by a conductive coil (,) and a sheath (,). The conductive coil (,) is obtained by helically winding a conductive wire (,), formed with an insulating coating layer (,) and having a diameter (d), to have a coil pitch diameter (mean diameter) (D). The sheath (,) is made of an electrical insulating material. An outer diameter G of the lead body (,) is set to 2 mm or less. The sheath (,) is formed of a soft material having a Shore hardness of 80A or less. The conductive coil (,) is set to have a spring index (D/d) of 7.8 or more.

Growing community of inventors

Nakai-machi, Japan

Fuminori Tsuboi