Magnetic trajectory prediction and position identification

A method of tracking a catheter placement system, comprising:

• providing the catheter placement system comprising:
• a needle formed of a magnetizable material;
• and
• a spring formed of a non-magnetizable material including an alloy having copper and beryllium and configured to display one or both of the same physical dimensions and mechanical properties as a spring formed of the magnetizable material;
• magnetizing the catheter placement system;
• producing a magnetic field from the needle, having a magnetic field strength or a magnetic field signature;
• and
• detecting the magnetic field by a sensor of a tracking system.

A method of manufacturing a trackable medical device, comprising:

• providing a medical device including a needle extending from a distal end of a body and a spring disposed within the body, the needle configured to access a vasculature of a patient and formed of one of 304-stainless steel or 17-7 precipitation hardened stainless steel, the spring including copper and beryllium;
• placing a portion of the medical device within a magnetizer that includes a magnetic element;
• magnetizing the needle and the spring;
• and
• providing a first magnetic signal from the needle.