Feeding tube with electromagnetic sensor
There is provided feeding tubes including an electromagnetic sensor including a sensor body comprising a core positioned at a distal end of the sensor lumen, and a wire extending along the length of the feeding tube, wherein an RF induced heating of the feeding tube in an MRI environment is below 5 degrees.
1. A method comprising:
subjecting a subject in need thereof to an MRI scan, wherein the subject has a feeding tube inserted into his/her stomach and/or duodenum;
wherein the feeding tube comprises a main lumen and a sensor lumen, the sensor lumen comprising an electromagnetic sensor;
wherein subjecting the subject to the MRI scan causes an increase in the temperature of the feeding tube of no more than 5 degrees Celsius;
wherein the feeding tube has a length of 900-1400 mm;
wherein the electromagnetic sensor comprises a wire extending along the length of the feeding tube; and
wherein the wire is a twisted wire.
2. The method of claim 1 , wherein the twisted wire has an outer diameter of 0.5 mm or less.
3. The method of claim 2 , wherein the twisted wire has an outer diameter of 0.4 mm or less.
4. The method of claim 1 , wherein said wherein subjecting the subject to the MRI scan causes in increase in the temperature of the feeding tube of no more than 3 degrees Celsius.
5. The method of claim 4 , wherein said wherein subjecting the subject to the MRI scan causes in increase in the temperature of the feeding tube of no more than 2 degrees Celsius.
6. The method of claim 5 , wherein subjecting the subject to the MRI scan causes in increase in the temperature of the feeding tube of no more than 1.5 degrees Celsius.
7. The method of claim 1 , wherein the feeding tube further comprises a radiopaque marker.
8. The method of claim 1 , wherein the sensor body has an outer diameter of 1 mm or less.