Cardiac Therapy System for Electromechanical Dissociation Detection
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Solution Overview
Problem
Current medical devices struggle to effectively treat electromechanical dissociation (EMD) of the heart, where the heart exhibits normal electrical activity but fails to perform mechanical contractions, particularly after cardioversion or defibrillation therapy.
Innovation Solution
A therapy system that senses physiological parameters to detect EMD and delivers electrical stimulation to modulate afferent or inhibit efferent nerve activity at nonmyocardial or nonvascular cardiac tissue sites, based on autonomic nervous system activity to promote mechanical contraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cardioversion or defibrillation therapy is delivered to the heart, then abnormal heart rhythms are corrected, but electromechanical dissociation state may occur where electrical activity is normal but mechanical contraction is insufficient
Solution Approach 1:
The system continuously monitors physiological parameters (blood pressure, flow, oxygen saturation) to detect EMD state and automatically adjusts stimulation therapy delivery based on the detected condition, creating a closed-loop feedback system that responds to the patient's real-time physiological state
Solution Approach 2:
The system proactively monitors for EMD state following cardioversion or defibrillation therapy and delivers preventive or early intervention stimulation before the condition worsens, addressing the problem before it becomes critical
2Productivity
If electrical stimulation is delivered to the heart to promote mechanical contraction, then EMD state is treated, but the underlying autonomic nervous system imbalance remains unaddressed
Solution Approach 1:
The system performs multiple functions through a single integrated platform: it monitors physiological parameters, detects EMD state, delivers cardiac stimulation therapy, and modulates autonomic nervous system activity, making the device versatile enough to address both the immediate mechanical contraction problem and the underlying autonomic imbalance
Solution Approach 2:
The therapy is divided into distinct functional components: sensing/monitoring module, EMD detection algorithm, cardiac stimulation delivery, and autonomic nervous system modulation, allowing each component to be optimized independently while working together as a coordinated system
3Measurement precision
If the system monitors multiple physiological parameters to detect EMD state, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The system uses an intermediary processing layer that integrates multiple physiological parameter inputs (blood pressure, flow, oxygen saturation, electrical activity) and applies detection algorithms to synthesize a unified EMD state determination, simplifying the complexity by providing a single integrated detection output rather than requiring separate analysis of each parameter
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
The system effectively treats EMD by enhancing heart mechanical contractions, ensuring adequate blood perfusion and addressing the underlying autonomic activity imbalances associated with the condition.
Implementation Method 1
the therapy system generates and delivers electrical stimulation to a tissue site of the patient to modulate afferent nerve activity and/or inhibit efferent nerve activity
Data Source
AI summary
In some examples, an electromechanical disassociation state (EMD) of a heart of a patient can be treated by delivering electrical stimulation to a tissue site to at least one of modulate afferent nerve activity or inhibit efferent nerve activity upon determining that the heart is in an electromechanical dissociation state, where the tissue site comprises at least one of a nonmyocardial tissue site or a nonvascular cardiac tissue site. The delivery of electrical stimulation may effectively treat the EMD state of the heart, e.g., by enabling effective mechanical contraction of the heart. In another example, an electromechanical disassociation state of a heart of a patient can be treated by determining autonomic nervous system activity associated with a detected EMD state of the heart of a patient, and delivering electrical stimulation therapy to the patient based on the determined autonomic nervous system activity of the patient associated with the EMD state.