TENS Unit and Bone Growth Stimulator: Why They Should Not Be Used Simultaneously

Transcutaneous Electrical Nerve Stimulation (TENS) and bone growth stimulators (BGS) use different electrical parameters for distinct therapeutic goals. Concurrent use is contraindicated.

Why Separate Use Is Required

• Interference: TENS (high frequency, low intensity, sensory-level) can disrupt BGS's specific pulsed electromagnetic field (PEMF) or capacitive coupling (CC) signal.
• Safety: Combined fields may cause unpredictable current density, skin irritation, or altered tissue response.
• Protocol integrity: BGS requires precise dosing (e.g., 20 min/day PEMF, 24 hrs/day CC). TENS alters local electrical environment.
• Manufacturer guidelines: All major BGS devices (Exogen, Orthofix, Biomet, DJO) explicitly prohibit simultaneous TENS use.

Recommended Sequencing

1. Use BGS per prescribed schedule (typically daily, continuous or divided)
2. TENS for pain control at separate times (e.g., BGS morning, TENS evening)
3. Minimum 1–2 hour gap between modalities
4. Different electrode/pad placement sites

Clinical Context

BGS used for nonunion fractures, spinal fusion, osteotomies. TENS for acute/chronic pain. Both may be part of comprehensive rehab—but not at the same time on the same area.