Dialysis Pressure Measurement Timing for Hypotension Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dialysis treatments for patients with end-stage renal failure often lead to rapid fluid removal from the blood, causing critical drops in blood pressure due to the time lag in fluid redistribution within the body, which existing methods fail to address effectively.
Innovation Solution
A method and system for determining optimal time points for blood pressure measurements during dialysis by monitoring ultrafiltration rate, relative blood volume, and sodium concentration, and triggering blood pressure measurements when predetermined criteria are met, using a control device or closed-loop control device to manage these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rapid fluid removal is performed during dialysis, then productivity of fluid removal is improved, but patient safety deteriorates due to critical drops in blood pressure
Solution Approach 1:
The system performs preliminary actions by continuously monitoring ultrafiltration rate, relative blood volume, and sodium concentration before critical hypotension occurs. The control device predicts potential blood pressure drops and triggers preventive blood pressure measurements and adjusts ultrafiltration rates before critical events happen, rather than reacting after the problem occurs.
Solution Approach 2:
The system implements continuous feedback by monitoring multiple parameters (ultrafiltration rate, relative blood volume, sodium concentration) and using this information to dynamically adjust the ultrafiltration rate. The control device compares real-time measurements against predetermined criteria and automatically modifies treatment parameters to maintain patient safety while optimizing fluid removal.
2Reliability
If continuous monitoring of multiple parameters is performed, then patient safety is improved, but device complexity increases
Solution Approach 1:
The control device serves multiple functions: it monitors ultrafiltration rate, relative blood volume, and sodium concentration; it predicts blood pressure changes; it triggers blood pressure measurements; and it adjusts ultrafiltration rates. By consolidating these diverse functions into a single multi-functional control system, the patent reduces overall system complexity while maintaining comprehensive patient safety monitoring.
3Measurement precision
If frequent blood pressure measurements are taken, then measurement precision of blood pressure status is improved, but loss of time increases
Solution Approach 1:
The system uses preliminary monitoring of ultrafiltration rate, relative blood volume, and sodium concentration to predict when blood pressure measurements will be critical. By pre-identifying high-risk time points based on parameter trends, the system triggers blood pressure measurements only when necessary, avoiding unnecessary measurements while ensuring critical events are detected.
Solution Approach 2:
Instead of continuous blood pressure measurement which would be excessively time-consuming, the system applies partial action by selectively triggering measurements based on predetermined criteria involving ultrafiltration rate, relative blood volume, and sodium concentration changes. This approach provides sufficient monitoring precision while minimizing time loss by avoiding redundant measurements during stable periods.
Data Source
AI summary
The present disclosure relates to a method for determining or recommending a time point for measuring a patient's pressure readings during a blood treatment session. The method encompasses monitoring the ultrafiltration rate with which the patient's blood is treated, a relative blood volume, and/or a sodium concentration or a change in any of these, for the existence of, or meeting any pre-determined criterion for the ultrafiltration, the relative blood volume, and/or the sodium concentration, or the change thereto. Furthermore, the method encompasses transmitting a signal to a blood pressure measuring device when the pre-determined criterion for the ultrafiltration rate, the relative blood volume, and/or the sodium concentration or the change thereto is met.