Wearable Injector Adhesive Module for Secure On-Body Attachment
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Solution Overview
Problem
Existing on-body drug delivery devices may not provide sufficient additional means for securing the device to the patient's body, and existing adhesives can be difficult to replace or refresh without removing the device.
Innovation Solution
The use of a dual adhesive approach, where the device includes an adhesive on its substrate and a separate adhesive module with a flexible adhesive film and support structure, providing additional points of attachment to the skin and allowing for easy replacement or refreshment without removing the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single adhesive is used on the substrate, then the device can be attached to the patient's body, but the adhesion security is insufficient and the adhesive cannot be easily replaced or refreshed
Solution Approach 1:
The adhesive system is divided into two independent modules: a first adhesive module integrated with the substrate and a second adhesive module separate from the device. This segmentation allows the second adhesive to be independently applied, replaced, or refreshed without removing or affecting the first adhesive, thereby improving both adhesion security and ease of maintenance.
Solution Approach 2:
A release liner acts as an intermediary between the second adhesive and its storage state. The release liner protects the second adhesive before use and allows controlled application to the skin, enabling easy replacement and refreshment of the adhesive without removing the device itself.
2Reliability
If additional adhesive is added to enhance security, then adhesion strength improves, but the device complexity increases
Solution Approach 1:
The adhesive system is divided into two independent modules: a first adhesive module integrated with the substrate and a second adhesive module separate from the device. This segmentation allows the second adhesive to be independently applied, replaced, or refreshed without removing or affecting the first adhesive, thereby improving both adhesion security and ease of maintenance.
Solution Approach 2:
The second adhesive module is designed as a disposable component that can be applied and removed easily. This allows the adhesive to be refreshed or replaced without affecting the permanent first adhesive or the device itself, reducing overall system complexity while maintaining strong adhesion.
3Area of stationary object
If adhesive is applied to the entire substrate, then coverage is maximized, but the amount of adhesive required increases and removal becomes more difficult
Solution Approach 1:
The first adhesive is applied only to specific regions of the substrate where permanent attachment is needed, while the second adhesive is applied separately to the skin surface. This localized application strategy provides adequate coverage for secure attachment while minimizing the total amount of adhesive required and facilitating easier removal.
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
The dual adhesive approach enhances the security of the device on the patient's skin, prevents leakage due to partial dislodgement, and simplifies the removal process by reducing the amount of adhesive needed on the substrate, ensuring reliable and easy attachment and detachment.
Implementation Method 1
The bottom surface of the substrate includes an adhesive applied thereto. The adhesive module includes an adhesive on the bottom surface of the adhesive module.
Data Source
AI summary
An on-body drug delivery device having a housing carried by a substrate. The device includes an adhesive module placed over at least a portion of said device to provide added securement of the device to the patient's body.