Infusion Set Adhesive Patch Layout for Fast Insertion and Secure Wear
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Solution Overview
Problem
Existing wearable drug delivery devices for parenteral administration, such as infusion sets and analyte sensors, face challenges including malfunction rates, size, weight, cost, and frequent relocation due to skin adherence issues.
Innovation Solution
The use of a dual-adhesive system comprising an instant tack adhesive and a prolonged wear adhesive in patient care assemblies, where the instant tack adhesive provides initial anchoring and the prolonged wear adhesive establishes full adherence over time, allowing for controlled insertion and secure attachment to the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single adhesive is used in patient care assemblies, then the device structure is simple, but the adherence strength is insufficient and requires frequent relocation
Solution Approach 1:
The adhesive patch is divided into two distinct adhesive regions: a first adhesive region with instant tack properties and a second adhesive region with prolonged wear properties. This segmentation allows each adhesive to perform its specific function optimally - the first adhesive provides immediate anchoring upon application, while the second adhesive maintains long-term adherence, thereby resolving the contradiction between simple structure and reliable adherence.
Solution Approach 2:
The adhesive patch uses a composite adhesive system combining two different adhesive materials with complementary properties. The first adhesive (instant tack) and second adhesive (prolonged wear) work together in a composite structure to achieve both immediate bonding strength and sustained adhesion over time, eliminating the need for frequent relocation while maintaining manageable device complexity.
2Loss of time
If the inserter assembly is pulled away quickly after application, then insertion time is reduced, but the adhesive does not reach full adherence strength
Solution Approach 1:
The first instant tack adhesive is applied to the adhesive patch before the device is applied to the patient, providing preliminary anchoring action. This preliminary adhesive layer ensures that when the inserter assembly is pulled away quickly during insertion, the device remains securely attached despite the brief contact time, while the second prolonged wear adhesive continues to reach full adherence strength over time.
Solution Approach 2:
The adhesive system changes parameters over time - the first adhesive provides immediate tack strength upon contact, while the second adhesive gradually increases adherence strength over a prolonged period. This temporal parameter change allows the device to be removed quickly during insertion while still achieving full adherence strength afterward, resolving the contradiction between insertion speed and adherence reliability.
3Weight of moving object
If wearable devices are made smaller and lighter, then patient comfort is improved, but skin adherence becomes more difficult
Solution Approach 1:
The adhesive patch distributes different adhesive properties to different local regions - the first adhesive region provides immediate local anchoring at the center of application, while the second adhesive region provides sustained local adhesion at the periphery. This local quality differentiation allows smaller, lighter devices to maintain reliable skin adherence despite reduced overall size and weight.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This dual-adhesive system ensures reliable and secure attachment of infusion sets and analyte sensors, reducing malfunctions and the need for frequent relocation, thereby enhancing the effectiveness and convenience of wearable drug delivery devices.
Implementation Method 1
establishing an adhering relationship between the application site and an instant tack adhesive as well as a prolonged wear adhesive of the adhesive patch
Implementation Method 2
the prolonged wear adhesive has established a full potential adherence strength
Data Source
AI summary
A patient care assembly component may comprise a patient care assembly base and an adhesive patch. The component may further comprise at least one first adhesive region on an adhesive bearing side of the adhesive patch. Each of the at least one first adhesive region may be formed of an instant tack adhesive and may be disposed inbound of the periphery of the adhesive patch. The component may further comprise at least one second adhesive region on the adhesive bearing side. Each of the at least one second adhesive region may be formed of a prolonged wear adhesive. The at least one second adhesive region may be presented on the adhesive bearing side where the at least one first adhesive region is absent. The adhesive patch may be sonically welded to the patient care assembly base at points in line with only the at least one second adhesive region.