Powering Life-Saving Confidence in Wearable Defibrillators

The Challenge

When every heartbeat matters, reliability can’t waver.

Our client, a leading manufacturer of wearable cardiac defibrillators needed to solve a critical problem; while their flagship lifevest was designed to continuously monitor patients at risk of sudden cardiac arrest (SCA), they uncovered a potentially fatal flaw: 

The contact  assembly supplied by a previous vendor was failing under daily wear, presenting a weak link in a system designed for zero failure. Contact deformation and intermittent continuity led to unreliable charging and, in some cases, the inability to deliver therapy.

For patients depending on uninterrupted operation, “intermittent” wasn’t an option.

The challenge was clear: engineer a contact  that could withstand thousands of mating cycles, exposure to sweat and motion, and still deliver flawless electrical performance. All without redesigning the existing housing.

How We Got There

IEH partnered directly with the client’s design and reliability teams to reengineer the connection interface using our hyperboloid contact technology, a system proven in aerospace and military applications where failure is never an option.

By leveraging the hyperboloid’s unique geometry, IEH developed a custom-fit solution that dropped seamlessly into the life vest’s existing connector layout. No housing redesign, no tooling delays, no compromise.

Understanding Hyperboloid Technology

Traditional pin-and-socket designs rely on rigid pressure points, like two flat surfaces pressed together. IEH’s hyperboloid contacts instead use multiple fine, flexible wires forming a sleeve around the mating pin, creating continuous points of electrical engagement for consistent current flow.

This architecture provides measurable advantages:

Reliability

• Over 100,000 mating cycles without degradation, verified through internal qualification testing.
• Continuous signal integrity across every connection event.

Mechanical Durability

• Flexible wire bundles eliminate fretting, displacement, and contact wear.
• Low insertion force allows for repeated daily use without fatigue or deformation.

Electrical Stability

• Uniform current distribution minimizes heat buildup.
• Consistent low resistance ensures continuous cardiac monitoring and reliable therapy delivery.

Mission-Built

Every element of the redesign was engineered for precision and speed.

• Custom Integration: Pin-and-socket geometries matched the client’s existing footprint. No redesign required.
• Fast Deployment: Concept to final delivery in just four months, including design, prototyping, and full qualification testing that met the client’s accelerated medical production timeline.
• Optimized Assembly: Solder cup and crimp options enabled seamless connection to the life vest’s electronics package.
• Environmental Readiness: Stable under moisture, temperature changes, and daily motion, all conditions typical of 24/7 patient wear.
  
   

Real-World Results

Where previous connectors failed, IEH’s hyperboloid solution delivered uncompromising performance:

• Zero connection failures throughout extensive testing.
• No loss in signal integrity across repeated charge and discharge cycles.
• Elimination of unplanned maintenance and system downtime.

In practice, this means more than reliability: it means life-saving care patients can count on. The life vest now operates continuously and confidently, giving patients and physicians renewed trust in every beat.

Why It Matters

Each successful connection represents a functioning, life-saving system.
By replacing traditional contact technology with hyperboloid architecture, IEH helped transform the wearable defibrillator from a vulnerable device into a mission-ready medical system.

• Continuous cardiac protection
• Improved patient adherence and confidence
• Enhanced physician trust in device performance
   

This is what reliability looks like when lives are on the line.

Strategic Impact

The life vest’s success showcases IEH’s unmatched ability to deliver aerospace-grade reliability to the medical industry.

• Market Differentiation: Superior durability and longevity over competitor devices.
• Faster Time-to-Market: Agile engineering cycle that kept the customer’s release on schedule.
• Future-Ready Design: Scalable contact architecture adaptable to next-generation wearables, monitors, and sensors.
   

“For wearables that are constantly mated, charged, or moved, IEH’s high-cycle hyperboloid contacts deliver what others can’t: reliability you can count on when lives are on the line.”

-Dave Offerman, President & CEO

What’s Next

The same hyperboloid technology now powering the life vest can enhance any wearable or portable medical platform, from continuous monitors to recharging systems and diagnostic devices.

IEH invites innovators to collaborate on the next generation of portable, reliable medical connectors built to save lives. Contact us today 866-832-5403