CPR Compression System with Periodic Patient Check Pauses

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Solution Overview

Problem

Manual cardiopulmonary resuscitation (CPR) can be ineffective due to rescuer fatigue and inability to maintain proper compression frequency, depth, and release, leading to inadequate blood circulation and potential organ damage.

Innovation Solution

A CPR chest compression system that includes a retention structure to hold the patient, a compression mechanism to perform automatic CPR compressions, and a user interface that outputs human-perceptible prompts to alert the rescuer to check the patient during pauses in compressions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual CPR is performed continuously, then blood circulation is maintained, but rescuer fatigue increases and compression quality degrades

Engineering Contradiction:

ImproveCPR effectivenessVSAvoidRescuer fatigue

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The CPR system performs self-monitoring of compression parameters (depth, rate, recovery phase) and automatically provides feedback to the rescuer, eliminating the need for continuous manual monitoring while maintaining high compression quality throughout the procedure

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system incorporates real-time feedback mechanisms that monitor compression depth, rate, and recovery phase, providing audible or visual cues to the rescuer to maintain proper technique, thereby preventing fatigue-related degradation in compression quality

Inventive Principle:

Principle #23Feedback

2Productivity

If CPR compressions are performed at high frequency, then blood circulation is improved, but rescuer ability to check patient condition deteriorates

Engineering Contradiction:

ImproveCompression frequencyVSAvoidTime for patient checking

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The system implements periodic pauses in compression at predetermined intervals (e.g., every 2 minutes) to allow the rescuer to check patient condition, while maintaining high compression frequency during active CPR cycles. This periodic interruption ensures both effective circulation and periodic patient assessment

Inventive Principle:

Principle #19Periodic action

3Reliability

If automated CPR system is used, then compression consistency is improved, but device complexity increases

Engineering Contradiction:

ImproveCompression consistencyVSAvoidSystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The system replaces manual mechanical compression with an automated mechanical compression device that uses a piston or plunger mechanism driven by a motor, ensuring consistent compression depth and rate while reducing the physical burden on the rescuer. The automation is achieved through mechanical or electronic actuation systems

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Productivity

If compression depth is increased, then blood circulation is improved, but risk of rib fracture increases

Engineering Contradiction:

ImproveCompression depthVSAvoidRib fracture risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system incorporates sensors that monitor compression depth in real-time and provide feedback to the rescuer or control system, ensuring that compression depth remains within the optimal range (at least 2 inches or 5 cm for adults) to achieve effective blood circulation while avoiding excessive depth that could cause rib fractures

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system allows adjustment of compression parameters (depth, rate, force) based on patient characteristics and response, optimizing the balance between achieving adequate blood circulation and avoiding excessive compression that could cause skeletal injury

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250152466A1CPR chest compression system periodically reminding attendant to check patient

Publication Date: 2025.05.15 PHYSIO CONTROL CORP

AI summary

In embodiments, a CPR chest compression system includes a retention structure that can retain the patient's body, and a compression mechanism that can perform automatically CPR compressions and releases to the patient's chest. The compression mechanism can pause the performing of the CPR compressions for a short time, so that an attendant can check the patient. The CPR system also includes a user interface that can output a human-perceptible check patient prompt, to alert an attendant to check the patient during the pause. An advantage can be when the attendant checks in situations where the condition of the patient might have changed, and an adjustment is needed. Or in situations where the patient may have improved enough to where the compressions are no longer needed.