Pacemaker Programming via Photodetector Hemodynamic Monitoring
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Solution Overview
Problem
Current methods for optimizing pacemaker settings, particularly for patients with chronic heart failure, are impractical due to the time-consuming nature of blood pressure measurements using sphygmomanometers and the clinical complexity and risks associated with invasive monitoring, and they do not account for physiological noise or elevated heart rates.
Innovation Solution
A pacemaker programming apparatus and method that uses a monitoring device to determine hemodynamic measures at each heartbeat, generating a programming signal for adjusting pacemaker attributes such as AV delay and VV delay, allowing for non-invasive, rapid optimization of pacemaker settings even at elevated heart rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blood pressure measurements are taken using a sphygmomanometer to optimize pacemaker settings, then hemodynamic effectiveness can be assessed, but the process becomes time-consuming and impractical
Solution Approach 1:
The patent replaces the mechanical sphygmomanometer measurement system with a photodetector-based optical system. The photodetector detects light absorption changes in the finger tissue corresponding to blood volume changes during cardiac cycles, enabling continuous non-invasive blood pressure monitoring without the time-consuming manual cuff inflation/deflation process.
Solution Approach 2:
The patent implements continuous blood pressure monitoring throughout the pacemaker optimization process. Rather than taking discrete intermittent measurements with a sphygmomanometer, the photodetector continuously tracks hemodynamic parameters at each heartbeat, allowing real-time assessment and immediate pacemaker parameter adjustment.
2Measurement precision
If invasive monitoring is used to measure blood pressure for pacemaker optimization, then accurate hemodynamic data can be obtained, but clinical complexity and patient risk increase
Solution Approach 1:
The patent introduces a photodetector as an intermediary device that indirectly measures blood pressure through optical absorption changes in peripheral tissue. This non-invasive intermediary measurement approach provides sufficient hemodynamic data for pacemaker optimization without the risks associated with invasive arterial catheterization.
3Measurement precision
If multiple blood pressure measurements are taken during optimization, then accurate pacemaker setting selection can be achieved, but operator dependency and procedural complexity increase
Solution Approach 1:
The patent enables the system to automatically perform multiple rapid hemodynamic measurements and self-determine the optimal pacemaker settings based on continuous photodetector data. The automated analysis of continuous blood pressure traces eliminates the need for operator-dependent manual measurement interpretation while maintaining measurement precision.
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 more accurate and efficient optimization of pacemaker settings, reducing operator dependency and risk, while accounting for physiological noise and providing hemodynamic effectiveness without the need for invasive procedures.
Implementation Method 1
a photodetector for detecting light passing through the finger of the individual and generating a signal indicative of blood pressure of the individual at each heartbeat of the individual
Data Source
AI summary
A pacemaker optimising apparatus comprising: a component (4) which noninvasively or invasively monitors a haemodynamic measurement continuously in an individual and a processor (15) for receiving the haemodynamic measure and generating a pacemaker programming signal in response to this. There is also provided a communication device (17) for sending the pacemaker programming signal to the control system of the pacemaker (2). There is also a method for an efficient process by which this apparatus can automatically use the haemodynamic measurements to determine the ideal settings for a particular pacemaker in a particular individual, and to updates the pacemaker's settings accordingly.