Capacitive coupling as an adjunctive treatment for avascular necrosis

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Regenerative Medicine

Background:

• Avascular necrosis (AVN) of the femoral head is a debilitating condition often requiring surgical intervention.
• Core decompression and grafting are established surgical treatments for AVN.
• Noninvasive electrical stimulation methods are being explored as adjunct therapies.

Purpose of the Study:

• To evaluate the efficacy of capacitive coupling electrical stimulation as an adjunct to core decompression and grafting for femoral head AVN.
• To compare surgical treatment (with or without electrical stimulation) to nonoperative management.
• To assess the impact on radiographic progression and need for total hip arthroplasty (THA).

Main Methods:

• Forty patients with Stages I-III femoral head AVN underwent core decompression and grafting.
• Patients were randomized to receive either active or inactive capacitive coupling for six months.
• Outcomes were assessed using Harris hip ratings, radiographic measurements, and THA rates over a 2-4 year follow-up.
• Results were compared to a historical cohort of 55 hips treated nonoperatively.

Main Results:

• No significant complications were reported for the surgical group.
• Both surgical groups (stimulated and non-stimulated) demonstrated better outcomes than nonoperative management regarding radiographic progression and THA rates.
• Capacitive coupling did not provide statistically significant additional benefits compared to core decompression and grafting alone.

Conclusions:

• Core decompression and grafting are effective treatments for Stages I-III femoral head AVN.
• Capacitive coupling electrical stimulation, as applied in this study, did not enhance the outcomes of core decompression and grafting.
• Further research may be needed to explore optimal parameters or alternative electrical stimulation modalities for AVN treatment.