[In vivo measurements of electric potentials of the Ilisarov external fixator].
Ilisarov's idea that electrical phenomena could contribute to the efficacy of the ring fixation apparatus prompted us to carry out this preliminary investigation. Patients with lower leg fractures and a four-ring fixation apparatus were selected; the electrical potentials were measured over non-fractured and fractured bones. Patients who could not be studied in the Faraday box were subjected to great disturbances, caused by mains voltage and a neighbouring transmitter; in these cases no objective results could be obtained. Only measurements in the Faraday box yielded reproducible results. The results demonstrate that there is generally a difference in electrical potential among the four rings in patients fitted with an Ilisarov apparatus. Furthermore, weight-bearing on the fixator-bone system causes changes in the electrical potential among the rings.
Müller
S
S
Abteilung für Unfall- und Wiederherstellungschirurgie, Berufsgenossenschaftliche Unfallklinik Hamburg.
Wolter
D
D
ter Haseborg
J L
JL
D001842:Bone and Bones / Q000503:physiopathology* / Q000601:surgery; D004574:Electromagnetic Fields; D016267:External Fixators; D017102:Fracture Healing / Q000502:physiology; D006801:Humans; D008564:Membrane Potentials; D013977:Tibia / Q000503:physiopathology; D013978:Tibial Fractures / Q000503:physiopathology* / Q000601:surgery
In-vivo-Messungen elektrischer Potentiale am Fixateur extern nach Ilisarow.