Medical wire having implanted device and method for using the same

A method for using a medical wire through a catheter arranged in a patient's body, said medical wire having an implanted device, in which the implanted device is connected to a distal end of a conductive guide wire through a joint member, and the joint member is heated by applying a high-frequency current through the guide wire, whereby the joint member is melted and severed so as to detach the implanted device from the guide wire, wherein the joint member is composed of a rod of a swelling resin, the outer diameter of which increases by at least 10% when brought into contact with water;

• the method comprises dipping the joint member in a saline solution before insertion into the patient's body.

A method for using a medical wire through a catheter arranged in a patient's body, said medical wire having an implanted device, in which the implanted device is connected to a distal end of a conductive guide wire through a joint member, and the joint member is heated by applying a high-frequency current through the guide wire, whereby the joint member is melted and severed so as to detach the implanted device from the guide wire, wherein the joint member is composed of a rod of a swelling resin, the outer diameter of which increases by at least 10% when brought into contact with water;

• the method comprises inserting the guide wire into the catheter in a state that high-frequency voltage for measurement is applied between the guide wire and a counter electrode provided on the patient's body, and detecting an impedance reducing phenomenon that an impedance between the guide wire and the counter electrode reduces rapidly, thereby confirming that the implanted device has been deposited properly in the patient's body.