Magnetic location detection

A method for treating a vascular injury of a patient, comprising:

• placing a magnet at a reference point on or near a body of the patient and generating a reference magnetic field and an origin point for the reference magnetic field;
• determining a location of a body landmark relative to the origin point of the reference magnetic field;
• inserting a medical assembly comprising a perfusion stent and a detector into a vasculature of the patient and advancing the medical assembly through the vasculature of the patient towards the reference point on the body;
• using the detector to measure the reference magnetic field and determine a position of the medical assembly relative to the origin point of the reference magnetic field;
• and
• deploying the perfusion stent once the medical assembly has reached a prescribed location in the body relative to the body landmark.

A magnetic location detection system, comprising:

• a reference magnet;
• a detector including a magnetometer;
• and
• a microcontroller in communication with the detector;
• wherein the reference magnet is placed external to a patient and configured to generate a reference magnetic field with a known origin, a known magnitude, and a known direction;
• wherein the magnetometer is configured to measure a first magnitude and a first direction of the reference magnetic field at a first position, and
• wherein the microcontroller is configured to determine the first position of the magnetometer relative to an origin of the reference magnetic field using a measurement of the first magnitude and the first direction of the reference magnetic field.