Percutaneous intramedullary rod interchange in osteogenesis imperfecta

Area of Science:

• Pediatric Orthopedics
• Biomedical Engineering
• Skeletal Dysplasias

Background:

• Osteogenesis imperfecta (OI) necessitates repeated intramedullary rod interventions to manage fractures and support growing bones.
• Current rod exchange methods can be traumatic, increasing risks of refracture and deformity in the fragile OI skeleton.
• The need for a less invasive, efficient rod management system is critical for improving patient outcomes.

Purpose of the Study:

• To describe the design, development, and initial clinical application of a novel stereotactic device for closed intramedullary rod retrieval and exchange in pediatric OI patients.
• To evaluate the feasibility and safety of this new technique in a pediatric cohort.
• To assess the potential of this device to facilitate more frequent and less traumatic rod exchanges.

Main Methods:

• In vitro design and testing of the stereotactic device.
• Pre-clinical evaluation using intramedullary rodding of rabbit tibiae.
• Clinical application in pediatric patients with osteogenesis imperfecta, involving closed rod retrieval and interchange procedures.

Main Results:

• The stereotactic device was successfully designed and developed.
• The procedure was utilized 12 times in six tibiae and six femora across pediatric patients.
• Eleven intramedullary rods were successfully retrieved, with successful rod interchange performed in eight instances.

Conclusions:

• The stereotactic device offers a promising solution for closed intramedullary rod management in pediatric osteogenesis imperfecta.
• This technique appears to be a relatively atraumatic and effective method for rod exchange.
• Further investigation is warranted to confirm long-term benefits in reducing deformity and fracture rates.