Adjustable Holding Force for Subcutaneous Sensor Insertion
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Solution Overview
Problem
Existing insertion devices for subcutaneous devices face challenges such as pain, tissue damage, mechanical complexity, and unreliable sensor placement during insertion, with hollow needles causing increased pain and tissue destruction due to larger cross-sections and uncertainty in sensor stability and removal.
Innovation Solution
An insertion device with a substantially rigid base body and adjustable holding force, using electrostatic, magnetic, or adhesion principles to securely insert and detach subcutaneous devices, minimizing mechanical complexity and puncture profile, ensuring controlled release and reduced pain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hollow needles are used for insertion, then sensor can be inserted into body tissue, but pain and tissue damage increase due to larger cross-section
Solution Approach 1:
The insertion device is divided into two functional parts: a rigid base body for stable insertion and a flexible sensor portion for minimal tissue disruption. This segmentation allows the insertion needle to have sufficient stiffness for reliable insertion while the sensor portion minimizes tissue damage and pain.
Solution Approach 2:
Different parts of the insertion device have different mechanical properties - the base body is rigid for stable insertion, while the sensor portion is flexible to minimize tissue disruption. This local differentiation of mechanical properties resolves the contradiction between insertion reliability and tissue damage.
2Stability of the object's composition
If rigid insertion aids are used, then sensor stability during insertion is improved, but device complexity increases
Solution Approach 1:
The insertion aid and sensor are merged into a single integrated device with a rigid base body and flexible sensor portion. This combination provides sensor stability during insertion through the rigid base body while avoiding the complexity of separate insertion aids.
Solution Approach 2:
The rigid base body serves multiple functions: providing structural stability during insertion, enabling precise positioning, and facilitating sensor detachment after insertion. This multi-functionality reduces device complexity while maintaining sensor stability.
3Ease of operation
If adjustable holding force is implemented, then sensor detachment control is improved, but device complexity increases
Solution Approach 1:
The holding force between the base body and sensor is made adjustable and dynamic, allowing optimization of the puncture profile and controlled detachment. This dynamic characteristic improves ease of operation while the adjustability mechanism is designed to minimize added complexity.
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 solution enables safe, reliable, and pain-free insertion of subcutaneous devices with minimal tissue disruption, maintaining sensor stability and reducing the risk of displacement or removal issues, while allowing for controlled detachment and minimizing the puncture profile.
Implementation Method 1
The insertion device is designed to generate an adjustable holding force between a base body of the insertion aid and the subcutaneous device, in particular between an insertion needle and the subcutaneous sensor. The holding force comprises in particular an electrostatic holding force.
Implementation Method 2
The insertion device comprises a control by means of which the holding force can be adjusted. The holding force comprises in particular an electrostatic holding force, in particular a magnetic holding force.
Implementation Method 3
The insertion device is embodied to generate an adjustable holding force between the base body and the subcutaneous device
Data Source
AI summary
An insertion device is proposed for at least partly inserting a subcutaneous device, more particularly a subcutaneous sensor for detecting at least one analyte, into body tissue. The insertion device has at least one insertion aid and at least one subcutaneous device. The insertion aid has at least one substantially rigidly designed base body, more particularly an insertion needle, for insertion into the body tissue. The insertion device is designed to generate an adjustable holding force between the base body and the subcutaneous device. The insertion device is designed to set the holding force during the insertion such that the subcutaneous device is held against the base body. The insertion device is furthermore designed to set the holding force after the insertion such that the subcutaneous device is detachable from the base body.