CPR Device with Remote Motor for MRI Imaging
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Solution Overview
Problem
Current automated CPR devices, such as the AutoPulse®, create significant metal artifacts that disrupt imaging processes in MRI, CT, and fluoroscopy, making it difficult to obtain clear images of the thorax or head during cardiac arrest treatment.
Innovation Solution
The CPR device is modified to position the motor, battery, and control systems outside the imaging field, using a pneumatic piston or motor-driven system with a spindle arrangement to translate inferior/superior movement into anterior/posterior force on the compression belt, minimizing metal artifacts and allowing for uninterrupted CPR during imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If metal components (motor, drive spool, chassis, battery) are positioned within the imaging field to enable CPR during transport, then automated chest compressions can be delivered, but metal artifacts are created that disrupt imaging quality
Solution Approach 1:
The CPR device is divided into two functional segments: a compression delivery system (belt and spindles) that can be positioned within the imaging field, and a power system (motor, battery, control electronics) that is positioned outside the imaging field. This segmentation allows the compression function to be maintained while eliminating artifact-causing components from the imaging area.
Solution Approach 2:
The motor, battery, and control system are extracted from the imaging field and positioned in an adjacent location (such as on the gurney or in a nearby cart). Only the essential compression components (belt and spindles) remain within the imaging field, removing the source of metal artifacts while preserving CPR functionality.
2Extent of automation
If the compression belt is driven by a motor and drive spool within the imaging field, then automated compressions are achieved, but the metal components create large artifacts that obscure patient anatomy
Solution Approach 1:
The motor and drive spool are extracted from the imaging field and positioned outside it. The compression belt is still automated through this remote motor system, but the metal components that generate artifacts are no longer within the imaging area, thus eliminating the harmful effect while maintaining automation.
Solution Approach 2:
A non-metallic intermediary mechanism (such as a belt-driven system with pulleys or a flexible transmission system) is used to transmit power from the motor located outside the imaging field to the compression belt within the imaging field. This intermediary allows automated compression without introducing metal artifacts into the imaging area.
3Ease of operation
If the AutoPulse battery is disposed beneath the head of the patient for portability, then the device can be easily transported, but significant artifact is created in head scans
Solution Approach 1:
The battery is extracted from the patient area entirely and positioned in a separate location (such as in the operator's cart or on a separate surface). This eliminates the artifact problem in head imaging while the device remains portable and easy to operate, as the battery is no longer a constraint on positioning.
Data Source
AI summary
Devices and methods for performing CPR on a patient within an imaging field of an imaging device. The device has a compression belt and a belt tensioning mechanism, both located on or in the device such that the head, neck, thorax and abdomen of the patient may be place within the imaging field with the compression belt installed about the patient and the belt tensioning mechanism will be located outside of the imaging field.