Implantable Intramural Pressure Sensor for Apnea Detection
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Solution Overview
Problem
Current methods for detecting abnormal respiration, such as obstructive sleep apnea (OSA) and central sleep apnea (CSA), in patients with congestive heart failure are inadequate, as they fail to accurately distinguish between the two conditions, which is crucial for effective treatment.
Innovation Solution
An implantable device that measures intramural pressure and uses this information to determine the presence of apnea, and if present, administers appropriate therapies like autonomic nerve stimulation, phrenic nerve stimulation, or cardiac stimulation, based on the type of apnea detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current detection methods are used, then device complexity is reduced, but measurement precision deteriorates because they fail to accurately distinguish between OSA and CSA
Solution Approach 1:
The detection system segments the apnea detection task into multiple independent measurement components: intrathoracic pressure sensing, intramural pressure sensing, and cardiac output monitoring. Each component analyzes specific physiological parameters to collectively distinguish between OSA and CSA with high precision while maintaining manageable system complexity through modular design
Solution Approach 2:
The implantable device integrates multiple functions into a single system: it simultaneously monitors intrathoracic pressure, intramural pressure, and cardiac output, and can detect both OSA and CSA conditions. This multi-functional approach improves measurement precision without proportionally increasing device complexity, as one device performs multiple detection roles
2Measurement precision
If intramural pressure measurement is added to detect apnea types, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent combines intrathoracic pressure measurement and intramural pressure measurement into a unified monitoring system. By merging these two pressure sensing functions within a single implantable device, the system achieves accurate apnea type differentiation while minimizing the increase in device complexity through integrated design and shared processing capabilities
3Reliability
If targeted therapy is implemented based on apnea type, then treatment effectiveness improves, but device complexity increases due to multiple stimulation types
Solution Approach 1:
The stimulation system is designed to be dynamic and adaptive, automatically selecting the appropriate stimulation type (autonomic nerve, phrenic nerve, diaphragm, or cardiac) based on real-time apnea type detection. This dynamic response mechanism improves treatment effectiveness by matching therapy to the specific condition while managing complexity through algorithmic decision-making rather than requiring all stimulation capabilities to be physically present simultaneously
Data Source
AI summary
An exemplary method includes determining an intramural pressure based on one or more in vivo pressure measurements, based on the intramural pressure, deciding whether apnea exists and, if apnea exists, calling for one or more types of stimulation selected from a group consisting of autonomic nerve stimulation, phrenic nerve stimulation, diaphragm stimulation and cardiac stimulation. Other exemplary methods, devices, systems, etc., are also disclosed.