Adaptive CPR Contact Surface for Sternal Angle Compensation
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Solution Overview
Problem
Current CPR chest compression machines struggle with maintaining effective blood circulation due to inconsistent compression patterns and difficulty in accommodating varying patient sternal angles, leading to potential organ damage from either too deep or too shallow compressions.
Innovation Solution
A CPR device with a compression mechanism that includes a support portion, a piston, and a contact surface, which can adjust its orientation based on input from sensors and user feedback to ensure optimal contact with the patient's chest, thereby accommodating different sternal angles and maintaining consistent compression depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed piston-based compression mechanism is used, then the device structure is simple, but it cannot accommodate varying patient sternal angles leading to inconsistent compression depth
Solution Approach 1:
The contact surface is made movable relative to the piston, allowing it to adjust its orientation dynamically. The contact surface can pivot or rotate to match different sternal angles, transforming a static compression mechanism into a dynamic one that adapts to varying patient anatomies while maintaining consistent compression depth
Solution Approach 2:
The solution adds an orientational dimension to the compression mechanism. Instead of only vertical piston movement, the contact surface can now rotate or pivot around the piston axis, providing an additional degree of freedom that enables adaptation to different sternal angles without complicating the fundamental compression function
2Productivity
If repeated compressions are performed at the same location, then the compression pattern is consistent, but blood circulation effectiveness is reduced due to non-physiologic compression
Solution Approach 1:
The contact surface orientation is periodically adjusted during the compression cycle, creating a varying compression pattern that mimics natural physiological movement. This periodic variation in compression angle enhances blood circulation effectiveness by engaging different vascular pathways while maintaining overall compression consistency through controlled repetition
Solution Approach 2:
The compression pattern is transformed from completely static to dynamically varying, where the contact surface angle changes periodically during operation. This dynamic adjustment improves blood circulation by creating more physiologic compression patterns while maintaining sufficient consistency through controlled periodic variation
3Manufacturing precision
If the contact surface orientation is fixed, then the device operation is simple, but compression accuracy varies with patient anatomy
Solution Approach 1:
The contact surface automatically adjusts its orientation to match the patient's sternal angle through self-aligning mechanisms or active sensors that detect anatomical features. This self-adjusting capability achieves accurate compression depth for varying patient anatomies while maintaining ease of operation, as the device performs the adjustment autonomously without requiring complex manual intervention
Data Source
AI summary
Embodiments of a Cardio-Pulmonary Resuscitation (“CPR”) device are disclosed. A CPR device can include a compression mechanism configured to perform successive CPR compressions on a chest of a patient, the compression mechanism including a support portion configured to be placed underneath a patient, a piston, and a contact surface configured to make contact with the chest at a first orientation with respect to the support portion; and a controller communicatively coupled with the compression mechanism. The controller can be configured to receive at least one input and determine whether the first orientation of the contact surface should be adjusted based on the at least one input. The controller can further, responsive to a determination that the first orientation of the contact surface should be adjusted, cause the contact surface to move so that the contact surface makes contact with the chest at a second orientation with respect to the support portion.