Tamper-Evident Closure Securing Strap with Perforated Weakness
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Solution Overview
Problem
Patients, especially those with psychiatric conditions, intellectually delayed individuals, and intravenous drug users, may tamper with intravenous access points, leading to unintended medication delivery and potential medical complications due to lack of effective tamper-evidence mechanisms in medical access devices.
Innovation Solution
A tamper-evident closure system comprising a holding cavity with a securing strap that has an area of weakness, allowing visible indication of tampering, and a closure mechanism that interlocks the parts, making it impossible to reapply without visible signs of breakage, ensuring the strap cannot be reapplied to appear intact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a securing strap is used to enclose the medical access device, then the device is protected from unauthorized access, but the strap can be removed and reapplied without visible signs of tampering
Solution Approach 1:
The patent incorporates an area of weakness (perforations) into the securing strap during manufacturing, which is designed to break under tension when the strap is removed. This preliminary structural feature ensures that any removal attempt automatically creates visible damage, preventing reapplication without signs of tampering.
Solution Approach 2:
The patent changes the structural parameter of the securing strap by introducing an area of weakness with specific mechanical properties. This area is designed to fail at a lower force threshold than the rest of the strap, creating a controlled breaking point that provides tamper evidence while maintaining the strap's overall integrity when properly installed.
2Reliability
If the securing strap is made strong to prevent removal, then tamper protection is improved, but the strap cannot be removed for legitimate access even when needed
Solution Approach 1:
The patent segments the securing strap into different functional zones: a strong main body for tamper protection and a weakened area for controlled breaking. This segmentation allows the strap to provide both security and accessibility - it remains intact during normal use but can be deliberately broken at the perforated section when legitimate access is required.
Solution Approach 2:
The patent applies local quality by creating a specific area of weakness (perforations) at a defined location on the securing strap. This localized feature has different mechanical properties than the rest of the strap, allowing it to break under tension while the remaining portions maintain their strength for both security and controlled removal purposes.
3Reliability
If the closure mechanism is made complex to ensure tamper evidence, then reliability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the tamper evidence function from a complex mechanical closure system and implements it through a simple structural feature - perforations in the securing strap. This extracted approach provides reliable tamper evidence through the breaking of the perforated section, eliminating the need for complex interlocking mechanisms, sensors, or multiple components.
Data Source
AI summary
The disclosed tamper-evident closure encloses a medical access device, such as a vascular access device, such that it will be visibly apparent if the medical access device contained in the tamper-evident closure becomes exposed. The tamper-evident closure cannot be reapplied over the medical access device in a way to look the same as it did prior to exposing the medical access device. The tamper-evident closures comprise a securing strap with a first securing strap portion secured to the first part of the tamper-evident closure, a second securing strap portion with a free end for securing to a second part of the tamper-evident closure, and an area of weakness separating the first securing strap portion from the second securing strap portion. The force to break the area of weakness is less than the force to separate the securing strap from the first part or second part.