Implantable Pressure Monitoring With Posture-Based Data Filtering
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Solution Overview
Problem
Cardiovascular pressure measurements are significantly affected by body position or orientation, making traditional clinical measurements inaccurate when patients are not in a supine position, such as during sleep.
Innovation Solution
Implementing an implantable pressure sensing device that measures cardiovascular pressure within a predetermined window of time, matching measurements with concurrent patient state data such as posture and activity level, and discarding or storing measurements based on patient state to form a dataset for accurate evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cardiovascular pressure measurements are taken continuously without regard to patient posture, then the quantity of measurement data increases, but the measurement precision deteriorates due to position-related inaccuracies
Solution Approach 1:
The system automatically discards cardiovascular pressure measurements taken when the patient is not in the target supine posture, and recovers/stores only those measurements taken during appropriate postures. This filtering process ensures that the stored dataset contains only high-quality, posture-appropriate measurements for accurate clinical evaluation.
2Reliability
If all cardiovascular pressure measurements are stored regardless of patient state, then the productivity of data collection increases, but the reliability of clinical evaluation decreases due to inclusion of inaccurate measurements
Solution Approach 1:
The system discards measurements taken during non-target postures and recovers only those taken during supine positioning, ensuring that the stored dataset maintains high clinical reliability while avoiding waste of storage resources on inaccurate data.
Solution Approach 2:
The system uses posture detection feedback to determine whether to store or discard pressure measurements. The posture sensor continuously monitors patient position and provides feedback to the control algorithm, which then selectively stores measurements only when the patient is in the correct supine posture, ensuring data reliability.
3Measurement precision
If measurements are selectively stored based on target posture, then the measurement precision improves, but the device complexity increases due to additional posture monitoring requirements
Solution Approach 1:
The system merges the cardiovascular pressure sensing function with posture detection functionality into a single integrated implantable device. By combining these two sensing capabilities and their associated processing algorithms, the system achieves posture-based selective measurement storage without requiring separate independent systems, thereby limiting the increase in device complexity.
Data Source
AI summary
A method for monitoring a cardiovascular pressure in a patient includes measuring, by pressure sensing circuitry of an implantable pressure sensing device, the cardiovascular pressure of the patient. The method further includes transmitting, via wireless communication circuitry of the implantable pressure sensing device, the measured cardiovascular pressure to another device. The method further includes determining, by processing circuitry of the other device, whether a posture of the patient at a time of the measured cardiovascular pressure was a target posture for cardiovascular pressure measurements. The method further includes determining, by the processing circuitry of the other device, whether to store or discard the transmitted cardiovascular pressure based on determining whether the posture was the target posture.