Electromagnetic Switching for Implanted Devices During Electrocautery
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Solution Overview
Problem
Existing magnetic switching devices for controlling implanted electrical devices, such as pacemakers and ICDs, are vulnerable to electromagnetic interference during surgeries, leading to potential malfunctions or inappropriate shocks, and existing solutions like reprogramming or using large permanent magnets are cumbersome and risky.
Innovation Solution
A magnetic switching device comprising an electrocautery system with an electromagnetic component that generates a controlled magnetic field to engage a switch in implanted devices, using an electromagnetic coil and control circuit to safely deactivate or activate the device, ensuring the magnetic field is strong enough to switch the device to a backup mode without shifting during surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large permanent magnet is used to inactivate the implanted device, then the device can be switched to backup mode, but it is difficult to position and ensure the magnet stays in place during surgery
Solution Approach 1:
The patent replaces the mechanical permanent magnet system with an electromagnetic field generation system. Instead of physically positioning a large permanent magnet, the system uses an electromagnetic component that generates a magnetic field when electrical power is supplied, eliminating the need for mechanical positioning and physical contact with the patient's body.
Solution Approach 2:
The patent transforms the static permanent magnet into a dynamic electromagnetic field source. The magnetic field can be turned on and off by controlling the electrical power supply to the electromagnetic component, allowing flexible activation and deactivation without physical movement or repositioning during surgery.
2Reliability
If reprogramming is performed to avoid EMI influence, then the device can be protected from interference, but it requires a technically skilled person to be present, making it expensive
Solution Approach 1:
The patent replaces the complex reprogramming process with a simple electromagnetic field activation. Instead of requiring technical expertise to reprogram device parameters, the system simply applies a magnetic field to the electromagnetic component, which automatically engages the magnetically-operable switch and protects the device from EMI.
Solution Approach 2:
The system provides self-service EMI protection by automatically responding to the presence of an electromagnetic field. When the electromagnetic component is activated, it automatically switches the implanted device to backup mode without requiring any manual configuration or programming decisions.
3Ease of operation
If an electromagnetic component is used to generate magnetic field, then the device can be controlled during surgery, but heat generation may occur during electrocautery operation
Solution Approach 1:
The patent divides the system into functionally separate components: the electromagnetic component for magnetic field generation and the electrocautery device for tissue cutting. These can be operated independently or simultaneously, with the electromagnetic component providing continuous magnetic field protection while the electrocautery device performs its function without thermal interference.
Solution Approach 2:
The patent introduces thermal management mechanisms as intermediaries between the electromagnetic component and the patient's body. Heat sinks, thermal conductors, or cooling systems act as intermediaries to dissipate heat away from the electromagnetic component, preventing thermal damage to surrounding tissues while maintaining effective magnetic field generation.
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 solution effectively prevents electromagnetic interference-induced malfunctions by generating a consistent and controlled magnetic field that reliably switches implanted devices to a safe mode, reducing the risk of inappropriate shocks and ensuring device safety during surgeries.
Implementation Method 1
the electromagnetic component is adapted to generate a magnetic field when electrical power is supplied to the electromagnetic component
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
A magnetic switching device includes an electromagnetic component adapted to be arranged proximate to an exterior surface of an object having a magnetically-switchable device therein and a control circuit electrically connected to the electromagnetic component. The electromagnetic component is constructed to generate a magnetic field of sufficient strength and orientation to engage a switch in the magnetically-switchable device. The invention further includes an electrocautery system, including an electrocautery device, a control circuit electrically connected to the electrocautery device, and an electromagnetic component electrically connected to the control circuit. The electromagnetic component is adapted to be arranged proximate to an exterior surface of an object having a magnetically-switchable device therein. Operation of the electrocautery device causes the electromagnetic component to generate a magnetic field of sufficient strength to engage a switch in the magnetically-switchable device.