Case Study: How Our Medical-Grade TPU Film Reduced Device Failure Rates by 30% for a Major OEM

This case study details a successful technical collaboration between a Fortune 500 global Original Equipment Manufacturer (OEM) of sequential compression devices (SCDs). The OEM faced persistent field failures and rising warranty costs due to inflatable bladder ruptures in their reusable therapeutic sleeves. By replacing their incumbent plasticized PVC film with our proprietary 0.20 mm MediFusion™ MX202 Medical-Grade TPU Film, the OEM achieved a 30% reduction in device failure rates within 12 months of full implementation. This resulted in over $2 million in annual warranty savings, improved patient therapy continuity, and strengthened brand reputation. This document outlines the technical challenge, our material solution, rigorous validation process, and quantified business outcomes.

Client Background & Industry Challenge

The Client
A Fortune 500 medical technology company and global market leader in vascular therapy and compression devices. Their flagship SCDs are used in hospitals worldwide for the prevention of deep vein thrombosis (DVT) and management of lymphedema — operating 24/7 in critical care environments.

The Core Problem
The client experienced an unacceptable failure rate in the inflatable bladders of their reusable gradient compression sleeves. Failures included sudden ruptures and chronic micro-leaks, leading to:

• Therapy disruption – Devices stopped working, increasing DVT risk for patients.
• High field repair/replacement costs – Warranty claims spiked across multiple hospital accounts.
• Customer (hospital) dissatisfaction – Negative feedback damaged the OEM’s reputation for reliability.
• Increased internal investigation costs – Engineering and QA teams diverted significant resources to failure analysis.

Preliminary Root Cause Analysis
The client’s internal investigation identified the plasticized PVC film as the primary contributor. Specific failure modes:

Plasticized PVC also posed long-term regulatory risks due to phthalate content, though not the immediate driver.

Solution: Proprietary Medical-Grade TPU Film

The client initiated a formal supplier qualification process. We was selected as the development partner based on proven expertise in medical-grade polymers and a track record of solving similar application challenges.

A. Material Specification Analysis

Our engineering team collaborated directly with the client to define exact requirements:

B. Proposed Solution

We recommended MediFusion™ MX202 Medical-Grade TPU Film – 0.20 mm thickness, selected for the following material properties:

Validation & Testing Process

The client required rigorous, data-driven validation before any material change. We supported a three-phase protocol.

Phase 1: Laboratory Benchmark Testing

We supplied film samples to the client’s internal lab and an accredited third-party lab.

Results (TPU vs. incumbent PVC):

Phase 2: Process Validation (HF Welding)

A key challenge was compatibility with existing production equipment. Our engineers visited the client’s manufacturing site to co-optimize welding parameters (power, pressure, dwell time, cooling).

Results:

• Achieved strong, consistent, defect-free welds across multiple production lines.
• Burst pressure tests on welded seams: TPU seams failed at 35% higher pressure than PVC seams.
• Critical observation: TPU failure mode was substrate tear (away from weld), whereas PVC failed at the weld interface.

Phase 3: Prototyping & Field Trial

The client produced limited-run sleeves using our TPU film and deployed them in a controlled 6-month field trial across three high-volume hospitals.

Results:

• Zero material-related failures in the TPU group (n=1,200 sleeves).
• Control group (incumbent PVC) showed expected failure rate of ~3.5%.
• Hospital staff feedback: TPU sleeves felt “more durable, flexible, and easier to clean.”

Implementation & Quantified Outcomes

Based on the validation data, the client approved full transition to MediFusion™ MX202 TPU film for all new production and as a replacement bladder in service kits.

Quantified Results (12 months post-implementation)

Additional Business Benefits

• Improved patient therapy continuity – Fewer device swaps during critical DVT prevention.
• Stronger brand reputation – OEM launched “enhanced durability” messaging as a competitive differentiator.
• Regulatory readiness – TPU’s phthalate-free composition aligns with EU MDR and future global restrictions.

Lessons Learned & Future Outlook

This case study demonstrates that in medical device design, material selection is not a commodity decision — it is a critical performance and risk-management decision.

Key Success Factors

• Collaborative problem-solving – We operated as an extension of the client’s engineering team, not just a material supplier.
• Data-driven validation – Every phase (lab, process, field) was backed by objective, auditable data.
• Support beyond the product – We provided technical expertise, on-site process optimization, and complete regulatory documentation (ISO 10993, material master files, welding guides).

Looking Forward

The success of this project has opened broader collaboration opportunities:

• The client is now evaluating our Tejidos recubiertos de TPU for reusable blood pressure cuffs and inflatable splints — targeting similar reliability and cost benefits.
• Initial discussions are underway to qualify our TPU film for single-use SCD sleeves to reduce hospital waste while maintaining performance.

Choosing our medical-grade TPU materials is not merely a supplier change — it is a strategic investment in device performance, regulatory security, and long-term brand equity

Ready to reduce your device failure rates? Contact us to request samples, welding support, or a customized validation plan.