Prestrain Adhesive for Respiratory Sensors
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Solution Overview
Problem
The application of external respiratory measurement sensors lacks standardization in prestrain, leading to variations in measurement accuracy due to differing tension applied by healthcare professionals.
Innovation Solution
A method involving two adhesive layers sandwiching a respiratory measurement sensor, with a support layer applied to maintain optimal prestrain, ensuring the sensor is stretched to a consistent length, thereby standardizing the prestrain and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light tension is applied to the sensor during application, then the sensor adheres properly to the skin, but the amount of tension varies between practitioners resulting in measurement inconsistency
Solution Approach 1:
The sensor is pre-strained during manufacturing to a specific strain level (e.g., 5% strain) before adhesive application. This preliminary action establishes a standardized initial state that eliminates variability in tension application during the actual sensor application process, ensuring consistent measurements while maintaining ease of application.
Solution Approach 2:
The invention changes the physical parameter of the sensor by applying a controlled pre-strain during manufacturing. This parameter change (from unstrained to pre-strained state) ensures that all sensors start with the same mechanical properties, eliminating practitioner variability in tension application and improving measurement reliability.
2Manufacturing precision
If the sensor is stretched to match support layer length, then standardized prestrain is achieved, but the application process becomes more complex
Solution Approach 1:
The sensor is pre-strained and matched to a support layer of specific length during manufacturing. This preliminary action embeds the standardization requirement into the sensor itself, so that during application, practitioners simply need to apply the pre-assembled sensor without performing complex stretching or measurement procedures, thus achieving manufacturing precision without increasing application complexity.
Solution Approach 2:
The pre-strained sensor with integrated support layer is designed to be self-regulating during application. The sensor's pre-established dimensions and strain state automatically ensure proper tension when applied, eliminating the need for practitioners to perform complex alignment or tensioning procedures.
3Measurement precision
If prestrain is applied to the sensor, then measurement accuracy is improved, but the sensor's stretching range is reduced
Solution Approach 1:
The invention changes the operating parameter of the sensor by establishing a pre-strained initial state. This parameter change optimizes the sensor's sensitivity for detecting respiratory movements while the sensor's total elongation capacity is designed to accommodate both the pre-strain and the additional strain from breathing, thus improving measurement precision without compromising functional range.
Solution Approach 2:
The sensor is designed with excessive total length capacity, where only a portion of the potential stretching range is used for pre-strain, and the remaining capacity accommodates respiratory movements. This partial use of the full stretching capability allows optimization for measurement precision while maintaining sufficient range for physiological variations.
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 approach reduces variability in sensor application, enhances measurement accuracy, and maintains the sensor within an operational range, preventing buckling and increasing sensitivity.
Implementation Method 1
The method may comprise two adhesive layers sandwiching a respiratory measurement sensor such that a layer of adhesive exists above and below the sensor
Implementation Method 2
Pretension may then be applied to the sensor as a support layer is applied on top of the adhesive layer above the sensor such that the length of the device matches the length of the support layer while the sensor is stretched
Data Source
AI summary
The present invention is directed to the standardization of prestrain applied to a sensor of an external respiratory measurement device. The method may comprise sandwiching the sensor between two adhesive layers and stretching the sensor by a fixed amount in order to match the length of the device to the length of a support layer. The device may then be covered by the support layer in order to keep the sensor in a state of prestrain, such that the length of the device matches the length of the support layer. The device may then be applied to the surface by the lower adhesive layer, and the support layer may then be removed, thus leaving the sensor in a standardized and optimal state of prestrain.