Solving Material Failures in a Patient-Facing Cannula System: A Case Study
A leading medical device manufacturer was struggling with recurring material performance issues in a critical component: the check valve ball inside a disposable cannula system. This small part needed to perform flawlessly in a moist, patient-facing environment, while staying clear, clean-looking, and comfortable.
Customer
A leading medical device manufacturer specializing in disposable respiratory and oxygen delivery systems.
Industry
Medical Devices / Healthcare
Application
A check valve ball is used within a transparent, disposable cannula system to regulate airflow during patient breathing.
Challenge
The customer faced ongoing material performance issues with the check valve ball used in the cannula system. The component needed to function reliably in a moist, patient-facing environment while maintaining visual clarity and comfort. Key challenges included:
Polymer balls were too soft and became indented over time, compromising valve reliability.
Metal balls corrode due to constant exposure to moisture and patient breathing, leading to rust.
Certain materials outgassed over time, creating unpleasant odors inside the cannula.
The transparent cannula design made any discoloration, corrosion, or material degradation immediately visible, raising quality and aesthetic concerns
Approach
The engineering team at Boca Bearings worked closely with the customer to fully understand the functional demands of the check valve and the environmental conditions inside the cannula system. Multiple advanced ceramic formulations were evaluated through iterative testing to assess weight, durability, chemical stability, odor neutrality, and long-term visual performance in a transparent medical device. Each material was tested under conditions simulating real-world use to ensure both performance and patient-facing requirements were met.
Solution
After evaluating several ceramic options, the engineering team selected alumina oxide ceramic as the optimal material for the check valve ball:
Alumina oxide provides high hardness and wear resistance while remaining lightweight.
The material eliminated deformation issues associated with polymer balls.
It resisted corrosion in moisture-rich environments, unlike metal alternatives.
Alumina oxide produces no outgassing or odor, improving patient comfort.
The ceramic maintained a clean, consistent appearance without discoloration inside the transparent cannula.
Results
The cannula system achieved:
Consistent and reliable check valve operation throughout the product’s intended lifecycle.
Elimination of material deformation, corrosion, and odor-related issues.
Maintained shape and surface integrity for dependable airflow control.
Improved overall product quality and visual appearance.
Customer Impact
The customer realized improved product reliability, enhanced patient comfort, and greater confidence in long-term performance. Material-related failures were reduced, aesthetics were improved, and the solution supported compliance with stringent medical device quality standards. The reliable ceramic solution strengthened the customer’s disposable cannula offering while preserving the transparency and cleanliness expected in patient-facing respiratory products.
Conclusion
This project highlights Boca Bearings’ ability to solve complex medical device challenges through advanced material science and collaborative engineering. By carefully evaluating ceramic formulations and validating performance through real-world testing, Boca Bearings delivered a reliable, high-performance solution that met both functional and patient experience requirements. Our application-driven approach transformed a persistent material issue into a dependable component that enhances product performance and patient confidence.
At Boca Bearings, we don’t just solve problems—we engineer solutions that perform.
For additional assistance, contact one of our bearing experts at Info@bocabearings.com.