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Magnetic transcutaneous fixation: an experimental study in pigs
Michel L H T Vaena1, João P Sinnecker2, Thiago J S Vargas3
1Hospital Universitário Pedro Ernesto, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
The Journal of Surgical Research
|November 29, 2017
Summary
Magnetic subdermal implants can be safely fixed to the skin
Area of Science:
- Biomaterials Science
- Dermatology
- Biomedical Engineering
Background:
- Magnetic subdermal implants for external device fixation are novel.
- Excessive magnetic force can cause tissue necrosis due to compression.
Purpose of the Study:
- Evaluate transcutaneous magnetic fixation feasibility.
- Assess secondary skin changes from continuous static magnetic fields.
Main Methods:
- Pig model with 72 subdermal implants.
- Ultrasonography for implant depth measurement.
- Computer simulations for safe magnetic attachment.
- 7-day transcutaneous magnetic compression with varying magnet strengths.
- Dermatopathological analysis of skin specimens.
Main Results:
- 81% of magnetic fixation sites healed without complications.
- Implant depths ranged from 4.6-8.3 mm with 13-37 mmHg pressure.
- Stronger magnets increased dermal thickness and neovascularization.
Conclusions:
- Transcutaneous magnetic fixation is viable in vivo under experimental conditions.
- Continuous static magnetic field stimulation shows effects similar to pulsed electromagnetic fields.
