Butterfly TENS Electrodes

Large-area TENS electrodes for lumbar and paraspinal pain. Engineered with specific carbon coating densities to prevent focal hot spots and lobed die-cuts to bypass spinal air gaps.

These butterfly-shaped electrodes serve as large-area physical interfaces for transcutaneous electrical nerve stimulation (TENS). They are configured specifically to map onto massive muscle complexes like the lumbar erector spinae. Rather than a simple geometric enlargement, the architecture manages complex electrical dispersion over a 150mm span. We manufacture these specialized substrates for B2B rehabilitation distributors and OTC hardware developers targeting the lower back pain (LBP) market.

• Focal Hotspot Mitigation 

  Electrical current takes the path of least resistance. On a standard large pad, current density spikes drastically directly underneath the metal snap or pin, causing severe tissue burns while leaving the edges completely unstimulated. The butterfly footprint utilizes an aggressive impedance-matching strategy. The carbon film thickness forces the electrons to travel laterally across the entire lobed area before dropping vertically through the hydrogel to penetrate the epidermis.

   

• Dynamic Lumbar Shear Tolerance 

  When a patient bends forward or twists, the lower back generates extreme three-dimensional mechanical stretch. Rigid or flowable gels fail under this dynamic stress, causing the pad edges to curl and detach. The hydrogel formulation deployed here shifts toward a higher storage modulus. It absorbs the kinetic strain from the underlying skin, stretching simultaneously with the spunlace backing to maintain the 3.0N peel force without structural tearing. 

   

• Spinal Process Air Gap Evasion 

  Applying a massive rectangular electrode across the center of the back leaves an air gap directly over the bony spinal column. Air is an insulator, triggering electrical arcing or machine errors. The specific central cutout of the butterfly die bridges the left and right paraspinal muscles while leaving the unyielding vertebrae exposed and untouched.

• Custom Backing Prints : The non-woven material accommodates high-contrast silk-screen printing for brand logos or anatomical placement instructions. 

• Supply Chain Routing : Base chemical compounding and high-speed rotary die-cutting are executed in China. Batch collation, pouch sealing, and final global palletization operate through our Vietnam hub to establish supply chain resilience and optimize transit tariffs.

Systems: Physical production and assembly run strictly within ISO 13485:2016 and MDSAP regulatory frameworks.

Biocompatibility : Raw materials pass ISO 10993-5 (Cytotoxicity) and ISO 10993-10 (Sensitization) limits.

B2B pain management distributors can request full-scale prototypes and impedance mapping data for our large-area substrates.

👉 [Request Butterfly Pad Prototypes]

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