Light Delivery Structures for Modulating Foreign Body Response
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Solution Overview
Problem
Foreign body responses (FBR) in living tissue, particularly induced by medical devices like continuous glucose monitors (CGMs), lead to adverse performance characteristics such as reduced accuracy and longevity due to collagen encapsulation, angiogenesis, and changes in local pH, which conventional strategies have not adequately addressed.
Innovation Solution
The use of light-based modulation techniques, including specific wavelengths and delivery structures, to inhibit collagen and fibrous tissue generation, modulate inflammation, and increase nitric oxide production, thereby improving the performance and longevity of percutaneous and subcutaneous devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a medical device is inserted into subcutaneous tissue, then the device can perform its function (e.g., glucose monitoring), but foreign body response leads to collagen encapsulation and reduced device performance
Solution Approach 1:
The patent applies preliminary action by delivering light therapy to the insertion site before device insertion to preemptively modulate the foreign body response. The light treatment is administered in the hours or days leading up to insertion, preparing the tissue environment to reduce subsequent collagen encapsulation and inflammation, thereby protecting device performance from the outset
Solution Approach 2:
The patent converts the harmful foreign body response into a beneficial outcome by using light therapy to modulate the inflammatory cascade. The same immune response that would normally lead to collagen encapsulation is redirected through light-mediated mechanisms to promote favorable tissue integration and reduce fibrosis, transforming the harmful FBR into a protective effect
2Duration of action of stationary object
If light therapy is applied to modulate foreign body response, then device longevity is improved, but additional device components and treatment protocols are required
Solution Approach 1:
The patent applies universality by designing the light delivery system to serve multiple functions: it can be integrated with various types of medical devices (glucose monitors, catheters, implants), applied at different insertion sites, and used with different light wavelengths to address various aspects of the foreign body response. This multi-functional approach allows a single light therapy platform to extend device longevity across multiple applications without requiring device-specific light systems
Solution Approach 2:
The patent uses light as an intermediary mediator between the device insertion event and the foreign body response modulation. Rather than directly modifying the device or the tissue, light acts as a non-invasive intermediary that triggers biochemical pathways (nitric oxide production, anti-inflammatory cytokine release) to indirectly control the FBR, simplifying the intervention while achieving complex biological effects
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
Enhances sensor accuracy and extends the operational life of devices by altering the FBR progression, reducing encapsulation effects and improving tissue compatibility, thus providing more precise glucose monitoring and reducing pain in subcutaneous implants.
Implementation Method 1
The use of light sources emitting specific wavelengths to modulate FBR, inhibiting collagen and fibrous tissue generation, and increasing nitric oxide production
Data Source
AI summary
Modulation of foreign body responses in living tissue, and more particularly, devices and related methods for light-based modulation of foreign body responses in living tissue are disclosed. Light sources are disclosed that provide light with characteristics for modulation of foreign body responses that may be elicited by percutaneous and/or subcutaneous devices, including medical devices and other consumer electronic devices. Light delivery structures are disclosed that propagate light from the light sources to irradiate associated subcutaneous tissues. Modulation of foreign body responses may include inhibiting collagen and fibrous tissue generation, modulating inflammation and healing, and/or increasing nitric oxide production and/or release. By modulating foreign body responses associated with percutaneous and/or subcutaneous devices, performance characteristics and lifetimes of such devices may be improved.