How precise is the PRECICE compared to the ISKD in intramedullary limb lengthening?

Abstract

Background and purpose — The PRECICE intramedullary limb lengthening system uses a new technique with a magnetic rod and a motorized external remote controller (ERC) with rotational magnetic field. We evaluated the reliability and safety of the PRECICE system.

Methods — We compared our preliminary results with PRECICE in 24 patients (26 nails) with the known difficulties in the use of mechanical lengthening devices such as the ISKD. We used the Paley classification for evaluation of problems, obstacles, and complications.

Results — 2 nails were primarily without function, and 24/26 nails lengthened over the desired distance. Lengthening desired was 38 mm and lengthening obtained was 37 mm. There were 2 nail breakages, 1 in the welding seam and 1 because of a fall that occurred during consolidation. ERC usage was problematic mostly in patients with femoral lengthening. Adjustment of the ERC was necessary in 10 of 24 cases. 15 cases had implant-associated problems, obstacles were seen in 5 cases, and complications were seen in each of 4 cases.

Interpretaion — The reliability of the PRECICE system is comparable to that of other intramedullary lengthening devices such as the ISKD. The motorized external remote controller and its application by the patients is a weak point of the system and needs strict supervision.

FS and MH conceived the study. FS, BV, HT, and BS assembled and analyzed the data. FS, BV, HT, MH, and RR performed the operations and follow-ups. BV, HT, BS, and RR made the radiographic measurements and arranged data. FS and RR prepared the initial draft and performed the comparison to the historical patient group. GG and RR made substantial changes to the manuscript. BV and RR revised the entire manuscript.

No competing interests declared.