Implantable Acceleration Sensing for Position-Adaptive Respiration Detection
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Solution Overview
Problem
Existing treatments for sleep disordered breathing, such as external breathing therapy devices and surgical interventions, often fail to effectively address the condition.
Innovation Solution
The detection of respiration information is based on sensing rotational movement at respiratory body portions, such as the chest or abdomen, using implantable acceleration sensors that measure inclination angles relative to the earth's gravity vector, allowing for accurate determination of respiratory waveforms and phases without requiring precise calibration of sensor orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external breathing therapy devices and surgical interventions are used, then treatment attempts are made, but they often fail to effectively treat sleep disordered breathing
Solution Approach 1:
The patent replaces complex mechanical breathing therapy devices with a simplified implantable system that uses acceleration sensors to detect respiration. The sensor system substitutes for elaborate mechanical ventilation equipment by providing accurate respiratory monitoring through acceleration-based detection, eliminating the need for complex external therapy apparatus.
Solution Approach 2:
The implantable device performs self-calibration and automatic adaptation to patient position changes without requiring external intervention or complex control systems. The system automatically adjusts to varying sleep positions and gravitational effects, enabling the device to serve itself and reduce dependence on complex external therapy management.
2Measurement precision
If acceleration sensors are used to detect respiration, then respiration information can be obtained, but sensor orientation calibration becomes complex
Solution Approach 1:
The system performs preliminary self-calibration during an initial period after implantation, automatically determining the relationship between sensor orientation and patient position. This preliminary action eliminates the need for complex manual calibration procedures before clinical use, as the device autonomously establishes its reference framework during normal operation.
Solution Approach 2:
The calibration system is designed to be dynamic and adaptive, automatically adjusting to changes in patient position and sensor orientation over time. Rather than requiring fixed, precise initial calibration, the system continuously adapts to varying conditions, simplifying the calibration process while maintaining measurement accuracy throughout the device's operational life.
3Reliability
If the device adapts to varying sleep positions, then detection reliability improves, but the system complexity increases
Solution Approach 1:
The system uses feedback from acceleration sensors to detect changes in patient position and automatically adjusts its detection algorithms accordingly. By continuously monitoring acceleration patterns and comparing them against known position signatures, the system adapts to varying sleep positions without requiring complex manual configuration or multiple specialized sensors for each position.
Solution Approach 2:
The acceleration sensor system serves multiple functions: it detects respiration, determines patient position, and provides data for both calibration and ongoing operation. This multi-functionality eliminates the need for separate specialized sensors or systems for each function, reducing overall device complexity while maintaining the ability to adapt to varying sleep positions.
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
This method provides reliable and accurate respiration information, enabling effective detection and treatment of sleep disordered breathing by implantable devices, regardless of patient position or noise interference, and adapts to varying sleep positions.
Implementation Method 1
sensing rotational movement at respiratory body portions, such as the chest or abdomen, using implantable acceleration sensors that measure inclination angles relative to the earth's gravity vector
Data Source
AI summary
Methods and/or devices to determine patient respiration information are disclosed which comprise sensing acceleration.