Timing Device for Dual Sequential Defibrillation Coordination
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Solution Overview
Problem
The administration of dual sequential defibrillation (DSD) is often poorly timed and uncoordinated due to reliance on human judgment, leading to ineffective therapy outcomes and potential fatal arrhythmias in cardiac arrest patients.
Innovation Solution
A timing device that provides notifications or directly controls defibrillators to ensure precise inter-shock timing intervals between sequential defibrillations, which can be adjusted based on clinical data or physiological parameters, allowing for simultaneous, sequential, or overlapping shock delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If human rescuers manually time the two defibrillation shocks, then the system is simple to operate, but the inter-shock timing accuracy deteriorates
Solution Approach 1:
A timing device is introduced as an intermediary between the human operator and the two defibrillators. This device receives a single trigger input from the operator and automatically generates precisely timed trigger signals to both defibrillators, eliminating the need for manual timing while maintaining operational simplicity. The timing device acts as a mediator that translates simple human input into precise coordinated output.
Solution Approach 2:
The manual mechanical timing process is replaced with an electronic timing system. Instead of relying on human reaction time and coordination, an electronic timing device with programmable delays generates precise trigger signals to both defibrillators based on a single operator input, substituting electronic control for manual coordination.
2Measurement precision
If a timing device is introduced to control defibrillator synchronization, then the inter-shock timing accuracy improves, but the device complexity increases
Solution Approach 1:
The timing device is designed to perform multiple functions: it triggers both defibrillators, provides visual and audible countdown signals to operators, and can be integrated with existing defibrillator systems. By consolidating these functions into a single device, the overall system complexity is managed while achieving precise timing control.
Solution Approach 2:
The timing device operates autonomously once triggered, automatically calculating and executing the precise timing intervals between defibrillator shocks without requiring continuous human intervention. The device self-manages the coordination process, reducing the operational burden on rescuers while maintaining high timing accuracy.
3Reliability
If precise inter-shock timing is implemented, then the therapy effectiveness improves, but the time required for coordination increases
Solution Approach 1:
The timing device is pre-programmed with the optimal inter-shock timing intervals based on clinical guidelines. When triggered, it automatically executes the predetermined timing sequence, eliminating the need for rescuers to calculate or decide on timing parameters during the emergency. This preliminary preparation ensures both effectiveness and speed.
Solution Approach 2:
The system allows for rapid execution of the defibrillation sequence by skipping intermediate decision-making steps. Once the timing device is activated, it immediately proceeds through the pre-programmed timing sequence, delivering both shocks in rapid succession with the precise interval required for effective therapy, minimizing delays in the critical resuscitation process.
Data Source
AI summary
Dual sequential defibrillation (DSD) systems and methods include the use of a timing device. The timing device can assist a user with DSD administration by providing notifications spaced apart by the inter-shock timing. The user can use these notifications to trigger the administration of defibrillation in a sequential manner. The timing device can also be coupled to two defibrillation devices and can output a signal to each of the defibrillation devices to cause the defibrillation device to administer a defibrillation. The output of the signals by the timing device can be spaced apart by the inter-shock timing. Additionally, the signals can be QRS-like in nature to cause the defibrillation devices to administer a defibrillation when in a sync mode.