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Medical device packaging is designed to preserve product sterility, functionality, and safety from manufacturing to end use. However, packaging is constantly challenged by environmental factors—particularly moisture and oxygen. These elements, when they find even the smallest path into a sealed package, can compromise product performance, shorten shelf life, and increase the risk of contamination. Ensuring packaging integrity against such ingress is an ongoing concern, especially for devices that are highly sensitive or sterile. Understanding how to detect and prevent these breaches is vital for manufacturers aiming to maintain product quality and user safety.

Why Moisture and Oxygen Control Matters in Medical Device Packaging?

Controlling exposure to moisture and oxygen is important for many types of medical devices. Items such as wound dressings, diagnostic test kits, implants, and electronics are particularly vulnerable. Moisture can lead to microbial growth, corrosion, or degradation of sensitive components. Oxygen, on the other hand, may trigger oxidation processes that can affect the stability or effectiveness of the product.

Even low levels of ingress can be problematic. That’s why packaging must act as a reliable barrier, especially over time and across varying storage or transport conditions. Seal integrity is at the core of this barrier performance, and detecting leaks that permit moisture or oxygen entry requires precision technologies that go beyond traditional visual inspections or dye-based methods.

Vacuum Decay Technology: A Proven Solution for Moisture and Oxygen Leak Detection

Vacuum Decay technology is a non-destructive, FDA-recognized method used for container closure integrity (CCI) testing, particularly in applications where product safety is highly sensitive. This technique minimizes product waste while providing valuable insights into package performance. It effectively detects leaks in sealed rigid, semi-rigid, and flexible packaging, whether the materials are porous or non-porous. The method is known for delivering consistent, repeatable, and measurable results.

The process involves placing the package in a specially designed test chamber connected to a leak detection instrument. A vacuum is applied, and the chamber is monitored using single or dual transducers. Any change in absolute or differential vacuum over the test cycle reveals potential leaks. The changes in absolute and differential vacuum indicate the presence of leaks and defects within the package. With a test time of only a few seconds, it helps preserve product inventory and offers a fast return on investment.

Benefits of Vacuum Decay Technology

• Non-destructive and non-invasive, no sample preparation
• Deterministic test method
• ASTM approved test method
• FDA Recognized Consensus Standard
• Quantitative results
• Eliminates cost and waste of destructive testing
• Allows for increased sampling
• Test results can be easily validated

The threat of moisture and oxygen ingress in medical device packaging underscores the need for reliable integrity testing methods. Detecting even the smallest breach can help prevent product degradation, contamination, or failure. Vacuum Decay leak testing Technology stands out as an effective solution that offers non-destructive, repeatable, and highly sensitive testing. By adopting such deterministic technologies, manufacturers can enhance packaging quality assurance, support compliance efforts, and deliver products that perform as intended from factory to point of use.

Seal quality has a direct influence on product stability, cleanliness, and shelf life. For industries such as pharmaceuticals, medical devices, and food & nutrition packaging, being able to inspect seals without damaging the product or packaging offers clear advantages. Airborne ultrasound is a non-invasive method that evaluates seal quality through sound wave analysis. It allows manufacturers to identify issues like pouch seal voids, misalignment, and channel leaks—without the need to cut open or alter the package. This method supports consistent inspection practices while helping maintain production efficiency.

A Leap from Traditional Methods

Conventional seal quality testing methods such as dye penetration, burst testing, and peel strength measurement are well-established but often destructive. These approaches require opening or damaging the package, leading to sample waste and additional handling. They also tend to focus on random sampling, which means some defects may go undetected.

Airborne ultrasound offers a different approach. By transmitting high-frequency sound waves across the seal area, this method collects feedback on seal uniformity and strength. Variations in the signal reveal defects that may not be visible or detectable by other non-destructive means. The process is fast, repeatable, and does not rely on visual cues—making it suitable for both offline batch testing and inline inspection during production.

Use Cases Across Industries

Pharmaceutical Packaging

Sterile barrier pouches are widely used in the pharmaceutical industry to protect drug products and maintain stability throughout their shelf life. These packages must stay sealed through manufacturing, transport, and storage to prevent exposure to moisture, oxygen, or other contaminants. Small defects like microchannels or incomplete seals can compromise product integrity without visible signs. Airborne ultrasound offers a non-destructive method to evaluate seal quality by using high-frequency sound waves to detect hidden flaws. It allows manufacturers to inspect packages without breaking sterility, making it suitable for development, routine quality checks, and process control. This approach supports higher inspection rates, reduces product loss, and aligns with pharmaceutical packaging standards by enabling thorough, repeatable testing in regulated environments.

Medical Devices

Medical devices, including surgical kits, diagnostic equipment, and sterile disposables, rely on flexible barrier packaging that must remain sealed until use. Seals that appear intact may still contain inconsistencies that could affect sterility. Airborne ultrasound allows manufacturers to evaluate these seals without opening the packaging, reducing the need for destructive checks. By scanning the seal area, the system can highlight voids, seal folds, or misalignment that may not affect appearance but can impact barrier performance. The technology is adaptable to various packaging formats and helps manufacturers monitor production quality without slowing down operations. It supports more consistent inspection routines and helps reduce sample waste.

Food and Nutrition Products

Food and nutrition products often use vacuum-sealed or flexible pouches that must resist external contaminants and preserve freshness. Packaging failure can lead to spoilage, consumer dissatisfaction, and product recalls. Airborne ultrasound enables non-contact inspection of heat seals on production lines or in the lab. It helps detect issues like uneven pressure, foreign material in the seal, or channel leaks that may lead to gradual air or moisture ingress. This technology supports high-throughput environments by delivering fast, automated inspection, which helps manufacturers keep up with production demands while maintaining seal consistency. It also minimizes rework by identifying seal variations before distribution, supporting product shelf life and packaging performance.

Airborne ultrasound presents a practical way to inspect packaging seals without destroying the sample or slowing down production. Its application across multiple industries shows its versatility in addressing modern packaging needs. Whether used for pharmaceuticals, medical devices, or food products, this technology supports manufacturers in maintaining consistent sealing practices. By detecting small defects that could impact performance, it offers an added layer of quality assurance with minimal disruption.