Skin Patch Gravity Resistance for Sensor Inserter Adhesion
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Solution Overview
Problem
Existing technologies fail to address the issue of skin patches drooping or sagging due to gravity, leading to poor adhesion and potential failure in coupling to a user, particularly in medical devices like continuous glucose monitors.
Innovation Solution
A system with a gravity resistance mechanism, such as a low tack adhesive or differential adhesive layers, is integrated into the skin patch to maintain its perpendicular orientation within a sensor inserter, ensuring proper adhesion upon deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the skin patch is stored in the sensor inserter tool for an extended period, then the adhesive patch may droop or sag due to gravity, but adding gravity resistance structures increases device complexity
Solution Approach 1:
The patent introduces a third dimension by adding vertical support elements (rafters, struts, or inflatable structures) that extend perpendicular to the adhesive patch plane. These elements create a three-dimensional architecture that resists gravitational sagging while maintaining the two-dimensional adhesive surface for skin contact.
Solution Approach 2:
The patent employs thin film structures including the adhesive patch itself and additional support films or inflatable membranes that provide gravitational resistance. These flexible thin films maintain structural integrity against gravity while remaining conformable to the skin surface during application.
2Area of stationary object
If the skin patch is made larger to improve adhesion area, then the patch is more prone to drooping and sagging under gravity
Solution Approach 1:
The patent divides the adhesive patch into multiple smaller adhesive regions or segments separated by spacer structures. This segmentation reduces the continuous adhesive area susceptible to gravitational deformation while maintaining sufficient total adhesion through distributed contact points across the skin surface.
Solution Approach 2:
By incorporating vertical support elements that extend into the third dimension, the patent provides structural reinforcement that counteracts gravitational forces on large adhesive areas. These vertical structures create a scaffold that prevents the adhesive patch from drooping while preserving the extended surface area for skin contact.
3Reliability
If the skin patch is folded upon itself during storage, then adhesion performance deteriorates, but preventing folding requires additional structural constraints
Solution Approach 1:
The patent uses vertical support elements and three-dimensional spacer structures to maintain the adhesive patch in a planar, unfolded configuration during storage. These vertical constraints prevent the patch from folding upon itself by providing structural rigidity in the vertical dimension, thereby preserving adhesion performance without requiring complex external restraining mechanisms.
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 gravity resistance system prevents drooping of the skin patch during storage and ensures full adhesion to the user, maintaining effective coupling and deployment of medical devices like glucose sensors.
Implementation Method 1
The gravity resistance system includes at least one adhesive layer coupled between the adhesive patch and the sensor inserter
Implementation Method 2
Gravity, when acting on the skin patch, may cause the skin patch to droop or sag within the sensor introducer tool
Data Source
AI summary
A system for a physiological characteristic sensor deployed with a sensor inserter includes an adhesive skin patch coupled to the physiological characteristic sensor. The adhesive patch is to couple the physiological characteristic sensor to an anatomy. The system also includes a gravity resistance system coupled to the adhesive patch and to be coupled to the sensor inserter. The gravity resistance system maintains the adhesive patch substantially perpendicular to a longitudinal axis of the sensor inserter prior to deployment of the physiological characteristic sensor and is removable from the adhesive patch by the sensor inserter upon deployment of the physiological characteristic sensor.