The magnetic field strength and the force distance dependency of the magnetically controlled growing rods used for early onset scoliosis.

ABSTRACT: Magnetically controlled growing rods (MCGR's) have revolutionized the treatment of early-onset scoliosis (EOS) because painless lengthenings can be done in the outpatient clinic without anesthesia. Untreated EOS leads to respiratory insufficiency and reduced life expectancy. However, MCGR's have inherent complications like non-functioning of the lengthening mechanism. We quantify an important failure mechanism and give advice on how to avoid this complication. The magnetic field strength was measured on new/explanted rods at different distances between the external remote controller and the MCGR and likewise in patients before/after distractions. The magnetic field strength of the internal actuator decayed fast with increasing distances and plateaued at 25-30 mm approximating zero. Two new

SUBMITTER: Diekhoner L 

PROVIDER: S-EPMC9944223 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature