Sensorized Joint Prosthesis for Early Misalignment Detection
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Solution Overview
Problem
Current medical implants, particularly total joint arthroplasty (TJA) devices, lack reliable mechanisms for early detection of misplacement, instability, or misalignment, and other complications, which are often difficult to identify without clinical visits and subjective assessments, leading to potential long-term mobility issues and complications.
Innovation Solution
Intelligent implants equipped with sensors, such as accelerometers, that generate data on the implant's movement and environment, allowing for remote monitoring and analysis to detect and quantify issues like incorrect placement, alignment, degradation, and instability, with systems for data transmission and analysis to healthcare providers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If clinical exams and imaging scans are used to monitor implant status, then implant function can be assessed, but early detection of misplacement, instability, or misalignment is limited and requires repeated invasive procedures
Solution Approach 1:
The implantable device performs self-monitoring of its own status parameters (misplacement, instability, misalignment) using integrated sensors and processing circuitry, eliminating the need for external clinical exams and imaging scans to detect early complications
Solution Approach 2:
The patent replaces mechanical/imaging-based monitoring systems (clinical exams, CT scans, MRI scans) with an electronic sensor-based system that continuously measures implant status parameters and transmits data wirelessly to healthcare providers
2Reliability
If implantable sensors are added to the prosthesis, then continuous monitoring and early detection of complications is enabled, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The implantable device integrates multiple functions (sensing, processing, wireless communication, power management) into a single multi-functional unit that can monitor various implant status parameters simultaneously, reducing the need for multiple separate components
Solution Approach 2:
The patent utilizes changes in physical parameters (acceleration, position, orientation) detected by sensors to monitor implant status, transforming mechanical status into electrical signals that can be processed and transmitted for early complication detection
3Loss of information
If frequent clinical visits and imaging scans are performed, then implant status can be monitored, but patient burden and healthcare costs increase
Solution Approach 1:
The implantable device enables continuous monitoring of implant status parameters between clinical visits, providing uninterrupted data collection and transmission, so that complete information about implant performance is available without requiring frequent patient visits
Solution Approach 2:
The system provides continuous feedback to healthcare providers through wireless data transmission, allowing real-time monitoring and early intervention based on actual implant status rather than waiting for scheduled clinical exams or patient symptoms
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
Enables early detection and characterization of implant problems, facilitating less invasive and more effective treatments, reducing the risk of bone erosion and fatigue, and improving patient outcomes by providing timely interventions.
Implementation Method 1
In one embodiment, the sensor is an accelerometer
Data Source
AI summary
Medical devices coupled to a sensor, and systems including such devices, can generate data and analysis based on that data, which may be used to identify and/or address problems associated with the implanted medical device, including incorrect placement of the device, unanticipated degradation of the device, and undesired movement of the device. Also provided are medical devices coupled to a sensor, and devices and methods to address problems that have been identified with an implanted medical device.