Augmentation Pressure Analysis for Circadian State Detection
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Solution Overview
Problem
Conventional pacemakers rely on detecting atrial and ventricular signals to synchronize heart stimulation, but this approach is not optimal as it does not account for the patient's circadian state and overall heart activity, leading to inefficiencies in heart function and potential missed conditions like hypertension or sleep apnea.
Innovation Solution
An implantable monitoring and stimulation device that processes blood pressure data to determine augmentation pressure, which is used to assess baro-receptor sensitivity and detect circadian states and other heart conditions, allowing for more accurate timing of heart stimulation and alerting mechanisms for conditions like hypertension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional pacemakers use atrial and ventricular signal detection for synchronization, then heart stimulation timing can be maintained, but the system cannot detect circadian states or conditions like hypertension and sleep apnea
Solution Approach 1:
The patent introduces blood pressure measurements as an intermediary parameter to indirectly assess circadian state and detect heart conditions. Instead of directly measuring circadian rhythms or sleep apnea, the system uses blood pressure augmentation pressure as a mediator that reflects these physiological states, enabling detection of circadian variations, hypertension, and sleep apnea through a single measurable parameter.
Solution Approach 2:
The patent replaces complex multi-sensor mechanical monitoring systems with a simpler blood pressure measurement approach. Rather than using multiple sensors to directly detect circadian rhythms, heart rate variability, and sleep apnea simultaneously, the system substitutes these with a single blood pressure measurement that captures all these physiological states through their common reflection in augmentation pressure.
2Measurement precision
If pacemakers rely on simple signal detection algorithms, then device complexity is reduced, but measurement precision for circadian state assessment is insufficient
Solution Approach 1:
The patent transforms the approach by changing the measurement parameter from direct electrical signals to blood pressure measurements. This parameter change enables precise circadian state assessment because blood pressure augmentation pressure naturally varies with circadian rhythms, providing a more sensitive and accurate indicator of circadian state than traditional electrical signal analysis.
3Productivity
If the pacemaker uses traditional pacing methods without blood pressure monitoring, then the system remains simple, but heart function efficiency is suboptimal
Solution Approach 1:
The patent implements feedback by continuously monitoring blood pressure augmentation pressure and using this information to adjust pacing decisions. The system feeds back circadian state information and heart condition data to optimize stimulation timing, improving heart function efficiency by adapting pacing to the patient's physiological state rather than using fixed protocols.
Data Source
AI summary
A monitoring and/or stimulation device to receive a signal from a lead sensor positioned in the heart of patient. The monitoring and/or stimulation device processes the blood pressure data received from the sensor to determine an augmentation pressure for each heart beat. The augmentation pressure may be tracked over time or compared to a template to determine the circadian state of the patient. The augmentation pressure may be tracked or analyzed over a longer time period to detect other heart conditions such as hypertension.