Implantable Access Chamber for Low-Downtime Sensor Replacement
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Solution Overview
Problem
Implantable devices experience significant downtime due to the foreign body response and healing process when replaced, which is not acceptable for devices requiring regular function, such as sensors.
Innovation Solution
An implantable access chamber with a permeable barrier portion allows for repeated access and replacement of sensors without disrupting the tissue interface, minimizing healing time and maintaining device functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If implantable devices are replaced to maintain functionality, then device performance is improved, but healing time and downtime increase
Solution Approach 1:
The implantable device is divided into two segments: a permanent implantable access chamber that remains in the body and forms a mature tissue interface, and a temporary sensor/therapeutic agent component that can be removed and replaced. This segmentation allows the mature tissue interface to be preserved while only the replaceable component is exchanged, eliminating the need to disrupt the healed interface during replacements.
Solution Approach 2:
The implantable access chamber is implanted first and allowed to form a mature tissue interface before the sensor or therapeutic agent component is introduced. This preliminary action creates a stable, healed interface that can withstand subsequent component replacements without requiring additional healing time.
2Measurement precision
If sensors are continuously monitored to maintain health characteristics, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensor component is extracted as a separate, removable element from the implantable access chamber. This allows the sensor to be optimized for measurement precision while the access chamber provides a simple, stable interface. The sensor can be replaced with advanced sensing technology without increasing the complexity of the implanted structure.
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 implantable access chamber enables continuous or near-continuous sensing and therapeutic agent delivery with reduced downtime by allowing new devices to be inserted into a mature tissue access chamber, reducing the need for repeated healing events.
Implementation Method 1
a barrier portion defining a cavity and being comprised of a material permeable to the interstitial fluid and occlusive to cells of the subject
Data Source
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AI summary
Sampling or removing interstitial fluid of a subject using an implantable access chamber and associated methods of use. An implantable access chamber can be configured to be inserted into tissue of a subject. The implantable access chamber can comprise a sensor arranged therein, wherein the sensor is configured to sense at least one analyte of interstitial fluid of the subject. The implantable access chamber can include a barrier portion defining a cavity. The barrier portion may be a material permeable to the interstitial fluid and occlusive to cells of the subject.