Tiny Implantable Sensor for Monitoring Body Chemistry

This patent describes a small, implantable sensor designed to continuously measure specific chemicals in a patient's body fluids for disease management.

What it covers

The patent details a microelectrochemical cell, a tiny device configured to be placed inside a patient's body. It includes a tube with a closed end for implantation and an open end that holds a 'feedthrough' for electrical wires, called 'electrode leads'. Inside this tube, a special fluid medium is kept in contact with the patient's bodily fluids. An 'analyte sensor' within this setup measures specific chemicals, or analytes, present in the body fluid, sending electrical signals through the leads to an external system. For example, such a device could continuously monitor glucose levels in a diabetic patient, providing real-time data.

What it doesn't cover

• —Does not cover sensors that are not implanted, such as external or wearable patches that do not penetrate the skin.
• —Does not cover sensors that measure physical properties like temperature or pressure, focusing specifically on chemical 'analytes'.
• —Does not cover devices where the fluid medium is not in direct communication with the patient's bodily fluid.
• —Does not cover implantable sensors that lack the specific tube structure with a closed implanted end and an open feedthrough end.
• —Does not cover systems where the electrical connections for the sensor are not routed through a feedthrough at the open end of the tube.

The clever bit

The novelty lies in the specific, compact design of the implantable microelectrochemical cell, which allows for a stable fluid interface with the body and a robust electrical connection for continuous, long-term chemical monitoring.

Why it matters

Continuous monitoring of specific chemicals in the body, like glucose or lactate, is vital for managing many chronic diseases. This technology aims to provide long-term, real-time data directly from within the body, which can lead to more personalized and effective treatment plans. Such devices can help patients and doctors make immediate decisions, potentially preventing serious health complications.

Real-world examples

• 1.Dexcom G7 Continuous Glucose Monitor
• 2.Abbott FreeStyle Libre systems
• 3.Medtronic Guardian Connect system
• 4.Implantable lactate sensors for critical care