Leadless Pacemaker Diastolic Pressure Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional cardiac rhythm management devices face complications such as infection, reduced mobility, scarring, and lead dislodgment or perforation due to their implantation method, and lack efficient methods for estimating diastolic pressure, which is crucial for heart condition monitoring and therapy optimization.
Innovation Solution
The use of leadless cardiac pacemakers (LCPs) that estimate arterial diastolic pressure by combining ventricular pressure information with heart sound timings, specifically utilizing the timing of first and second heart sounds (S1 and S2) with potential correction factors, to provide accurate systemic or pulmonary diastolic pressure measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional CRM devices are implanted with leads and pressure sensors, then diastolic pressure can be monitored, but complications such as infection, lead dislodgment, and perforation occur
Solution Approach 1:
The patent extracts the pressure sensing function from the traditional lead-based system and integrates it into a leadless cardiac pacemaker (LCP). The LCP contains an intracardiac pressure sensor that directly measures ventricular pressure without requiring separate leads, thereby eliminating lead-related complications while maintaining pressure monitoring capability
Solution Approach 2:
The patent combines multiple functions (pacemaking, pressure sensing, and diastolic pressure estimation) into a single leadless device. The LCP integrates the pressure sensor with the pacemaker functionality, allowing simultaneous delivery of electrical stimulation and pressure measurement without additional leads or sensors
2Object-affected harmful factors
If leadless cardiac pacemakers are used, then implantation complications are reduced, but the device has more limited power and processing capabilities
Solution Approach 1:
The patent applies partial action by using a simplified estimation algorithm that requires only essential measurements (ventricular pressure and heart sound timings) rather than comprehensive hemodynamic monitoring. This approach provides sufficient clinical information for diastolic pressure estimation while consuming minimal power and processing resources
Solution Approach 2:
The LCP uses its own integrated sensors (pressure sensor and heart sound sensor) to generate diastolic pressure estimates without requiring external monitoring equipment. The device autonomously processes its own measurements to provide therapeutic information, reducing the need for additional external power or processing infrastructure
3Measurement precision
If ventricular pressure and heart sound timings are combined to estimate diastolic pressure, then accurate pressure estimation is achieved, but device complexity increases
Solution Approach 1:
The patent segments the measurement process into distinct, independently manageable components: (1) ventricular pressure measurement by the pressure sensor, (2) heart sound detection by the acoustic sensor, (3) timing extraction of S1 and S2 sounds, and (4) diastolic pressure calculation using the extracted features. This segmentation allows each component to be implemented separately and combined in a straightforward manner, minimizing overall system complexity
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 allows for non-invasive, efficient estimation of diastolic pressure, reducing complications associated with traditional devices and enabling real-time monitoring and therapy adjustments, improving the management of heart conditions without the need for invasive implantation.
Implementation Method 1
The body sounds, or other physiologic information, can be used to diagnose one or more physiologic conditions
Implementation Method 2
the one or more leads can include a pressure sensor positioned in the heart and coupled to the CRM device through a conductor in the lead
Data Source
AI summary
Arterial diastolic pressure of a patient can be estimated using ventricular pressure information of a heart of the patient and heart sound information of the heart of the patient, such as a timing of at least one of a first heart sound (S1) or a second heat sound (S2), in certain examples, adjusted by a respective correction factor.