CPR Back Plate Ribs for Rigidity and Weight Reduction
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Solution Overview
Problem
Mechanical CPR compression devices face challenges in accommodating varying patient sternum heights and chest widths, with existing designs often being too rigid or requiring complex sliding mechanisms that are difficult to set up under pressure and may not provide sufficient resistance for effective chest compression.
Innovation Solution
A back plate design for mechanical CPR devices that includes static attachment elements for connecting legs, a hollow structure with ribs for structural rigidity, and adjustable configurations to accommodate different patient sizes, along with anti-slip features to prevent movement on slippery surfaces, enhancing stability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid back plate design is used to provide sufficient resistance for chest compression, then compression effectiveness is improved, but weight and difficulty of setup increase
Solution Approach 1:
The back plate is divided into multiple rib structures that run along its length, creating segmented support zones. This segmentation allows the plate to achieve necessary rigidity through the distributed rib framework rather than requiring a uniformly thick heavy plate, thereby reducing overall weight while maintaining compression resistance.
Solution Approach 2:
The back plate utilizes composite construction combining rigid rib structures with lighter infill materials or hollow sections between ribs. This composite approach provides the necessary structural strength for chest compression resistance while significantly reducing the overall weight compared to a solid rigid plate.
2Adaptability or versatility
If sliding mechanisms are added to accommodate varying patient sizes, then adaptability is improved, but device complexity and setup difficulty increase
Solution Approach 1:
The back plate incorporates adjustable elements that can be dynamically reconfigured to match different patient anatomies. Rather than complex sliding mechanisms, the design uses adjustable rib positions or removable/adjustable components that can be quickly configured for varying sternum heights and chest widths, maintaining adaptability while reducing mechanical complexity.
Solution Approach 2:
The back plate design allows modification of key geometric parameters such as rib spacing, plate length, or attachment point positions to accommodate different patient sizes. By providing adjustable parameters rather than moving mechanical parts, the system achieves versatility without the complexity of sliding mechanisms.
3Strength
If more structural ribs are added to improve rigidity, then strength is improved, but weight increases
Solution Approach 1:
Rather than uniformly thick construction, the back plate features ribs concentrated in specific locations where structural support is most needed for chest compression. The spacing and distribution of ribs are optimized to provide rigidity only where required, allowing lighter material usage in less critical areas and reducing overall weight.
Solution Approach 2:
The rib structure is segmented into discrete elements rather than continuous thick sections. This segmentation allows the plate to achieve necessary rigidity through the distributed rib framework while using less material overall, thereby reducing weight compared to a uniformly strong design.
Data Source
AI summary
A back plate for use with a CPR compression device can include first and second static attachment elements configured on first and second sides, respectively, to releasably connect to first and second legs, respectively. In addition, a bottom surface of the back plate can include a plurality of ribs that run from the first side to the second side in parallel to the third and fourth sides. The back plate also includes a hollow portion between the upper and bottom surfaces and the first, second, third, and fourth sides, and the ribs and third and fourth sides provide structural rigidity to the back plate. A plurality of openings along the third and fourth sides may be configured for strapping the back plate to a patient. Grooves may be configured on the top surface to hide sink marks on the top surface caused by the ribs on the bottom surface.