Cardiac Assist Pump Sensing for Real-Time Native Output Weaning
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Solution Overview
Problem
Current cardiac assist devices lack the ability to continuously measure native cardiac output during recovery, leading to prolonged weaning processes and increased risks for patients, as they rely on static pump flow settings and subjective clinical assessments.
Innovation Solution
The development of a cardiac assist device with implanted sensors that measure native volume and pressure using admittance-based technology, allowing for real-time monitoring and dynamic adjustment of pump speed to match native cardiac output, thereby facilitating automatic weaning and reducing patient risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static pump flow settings are used in cardiac assist devices, then device complexity is reduced, but measurement precision and ability to monitor native cardiac output deteriorates
Solution Approach 1:
The patent integrates admittance measurement electrodes directly into the cardiac assist device catheter structure, nesting the measurement function within the existing pump delivery system. This allows native volume measurement capability to be embedded in the device without requiring separate external measurement equipment, thereby improving measurement precision while minimizing additional device complexity
Solution Approach 2:
The cardiac assist device is designed to perform multiple functions: mechanical pumping of blood and simultaneous admittance-based volume measurement. The same catheter structure serves both as the pump delivery vehicle and as the measurement probe, allowing the device to provide both therapeutic and diagnostic functions, thus improving measurement capability without proportionally increasing complexity
2Reliability
If continuous real-time monitoring is implemented, then reliability of patient recovery assessment improves, but loss of time for device removal decision-making worsens
Solution Approach 1:
The patent implements continuous real-time monitoring of native cardiac output through admittance measurements, providing ongoing feedback on heart recovery status. This feedback loop enables clinicians to objectively assess recovery progression and make timely weaning decisions based on actual physiological data rather than static initial assessments, improving reliability while actually reducing decision-making time through continuous information availability
Solution Approach 2:
The monitoring system operates continuously throughout the patient's recovery period, maintaining constant surveillance of cardiac function. This continuous measurement capability ensures that recovery assessment is always up-to-date, enabling prompt identification of optimal weaning时机 and reducing delays associated with intermittent or delayed assessment methods
3Reliability
If prolonged weaning process is used, then reliability of heart recovery is improved, but object-generated harmful factors such as sepsis risk increase
Solution Approach 1:
The patent enables dynamic adjustment of pump flow settings based on real-time native cardiac output measurements. As the heart recovers and native output increases, the pump flow can be progressively reduced in a controlled manner. This dynamic weaning approach allows for optimized recovery support that can be tapered promptly when recovery milestones are achieved, maintaining reliability while minimizing prolonged device indwelling time and associated infection risks
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 continuous, real-time measurement of native cardiac output, allowing for optimized pump speed adjustment and safer weaning from cardiac assist devices, improving patient recovery and reducing hospital stay and complications.
Implementation Method 1
measures native volume and pressure using admittance-based technology
Implementation Method 2
measures native volume and pressure using admittance-based technology
Data Source
AI summary
An apparatus for a heart of a patient having a cardiac assist device adapted to be implanted into the patient to assist the heart with pumping blood. The apparatus has a sensor adapted to be implanted into the patient. The sensor in communication with the cardiac assist device and the heart which measures native volume of the heart. Alternatively, the sensor monitors the heart based on admittance while the cardiac assist device. Alternatively, the sensor monitors the heart based on impedance.