Modern medical procedures replace open surgery by the use of endoscopes and catheters. These are manually pushed from outside, while their flexible heads are mechanically by wires, manually operated. Small “USB endoscopes” are easily available at very low cost. Permanent magnets can be attached to such devices easily. With the TAPAS boards we want to test a coil scheme, where a magnetic field is used to align/orientate and move such small permanent magnets.
As shown in literature, a rotatable head on the endoscope with a magnetic moment can be rotated by slowly alternating external fields. If the head has a screw-like outer shape, it can be propelled ie. in a rubber tube, simulating tissue. We plan to develop a measurement and a feedback to ensure that the head is rotating with 3 axis Hall modules. This would result in a servo-motor like “driver” for endoscopes or catheters.
These tests will be done in a ~1:8 small-scale demonstrator on “hobby scale”. The device has 6 independent powered Helmholtz-coils in 3 axes. According to our calculations currents of 5 to 15A are needed for the proposed application in this scale. Powering the coils by TAPAS boards will allow concentrating on the development of feedback and intuitive steering systems with the sub-scale demonstrator.
We are a team of 3 people Dr. Asim Araz, Dr. Martin Bräuer, Klaus Hörcher and will conduct this project as a team outside our professional affiliation.
This idea submission is among the finalists and will be presented at the CKI Conference in Erlangen.