Heart Shock Pads

B2B heart shock pads for AED systems. Engineered with rapid-wetting hydrogels for hairy/diaphoretic skin and MVTR-controlled packaging for 36-month pre-connected standby readiness.

Heart shock pads are single-use, critical transdermal interfaces designed for Automated External Defibrillators (AEDs) and clinical manual defibrillators. Their absolute physical function is to transfer a massive, life-saving electrical shock (up to 360 Joules) through the chest wall to depolarize a fibrillating myocardium. Unlike standard clinical electrodes that are applied to prepped skin, these emergency substrates must perform instantly on unprepared, often diaphoretic (sweaty) or hairy skin. We supply these high-risk Class IIb/III consumable blanks to global AED hardware manufacturers and public-access defibrillation networks.

The pad architecture is a multi-layer composite engineered to withstand extreme electrical and mechanical shock. The top layer is a 1.0mm dielectric closed-cell PE foam that structurally isolates the operating responder from the high-voltage pulse. Beneath this, a precisely mapped Ag/AgCl (Silver/Silver Chloride) conductive trace is deposited on a PET carrier film. To eliminate localized current density spikes, the trace is masked with a dielectric layer, forcing the 360J energy vector to distribute evenly across the conductive surface. The final layer is a hyper-saturated, low-impedance polyacrylamide hydrogel. Complete lamination and converting lines operate within ISO 13485 cleanrooms.

• Rapid-Wetting Hydrogel Mechanics 

  In an out-of-hospital cardiac arrest (OHCA), the patient's chest may be covered in dense hair or excessive sweat. Standard solid hydrogels will rest on top of this physical barrier, creating air gaps. When high voltage fires across an air gap, it generates a plasma arc, causing catastrophic third-degree burns without delivering the energy to the heart. This specific hydrogel exhibits a low initial viscosity under pressure. When the responder firmly presses the pad onto the chest, the gel rapidly "wets out," flowing down hair shafts and displacing surface sweat to establish an immediate, zero-void electrical bridge to the epidermis. 

   

• High-Voltage Dielectric Breakdown Resistance

  During a shock cycle, up to 5,000 peak volts pass through the internal Ag/AgCl layer. If the external backing material yields to dielectric breakdown, the current will breach the top surface of the pad, severely shocking the clinician performing CPR. Spunlace or thin PVC backings are structurally incapable of halting this voltage. The 1.0mm cross-linked closed-cell PE foam used in this substrate is mathematically rated for high-voltage insulation. It safely absorbs the residual electromagnetic field, trapping the lethal current safely beneath the foam layer. 

   

• Pre-Connected MVTR Control 

  Modern AEDs require pads to be "pre-connected" to the machine inside public cabinets. This means the lead wires must exit the sealed foil pouch. Creating an exit point inherently breaches the hermetic seal of the packaging. If atmospheric air enters, the hydrogel dries out over a few months, rendering the pad useless. We engineer a specialized pressure-sealed gasket around the wire exit point on the heavy-gauge AL/PE foil pouch. This strictly limits the Moisture Vapor Transmission Rate (MVTR), guaranteeing the hydrogel retains its exact chemical water balance for a 36-month standby lifespan.

• Anatomical Graphic Printing : Proper placement is critical for vectoring the shock through the heart. We utilize high-contrast flexographic printing directly on the PE foam backing to clearly indicate Apex and Sternum placement positions, ensuring untrained bystanders can apply the pads correctly in a panic.

• Logistics Routing : Base chemical compounding, Ag/AgCl printing, and die-cutting operate in China. Critical wire crimping, specialized MVTR pouch sealing, and final global fulfillment execute at our Vietnam hub to manage supply chain continuity and offset international medical device tariffs.

• Regulatory Backing : Product files and extreme-load testing data support OEM submissions for high-risk FDA Class III and CE (MDR) Class IIb device registrations. 

• Systems : Physical compounding, connector mating, and vacuum sealing lines operate strictly under audited ISO 13485:2016 frameworks.

B2B hardware developers and AED manufacturers can request die-cut tolerance prototypes and Ag/AgCl impedance mapping reports.

👉[Request Heart Shock Pad Prototypes]

Hot Tags: heart shock pads, China heart shock pads manufacturers, suppliers, factory, Defibrillator Pads, defib electrodes, Adhesive Defibrillator Pads, Defibrillator Electrode Pads, defibrillator electrodes, Electrodes for Defibrillation