Adjustable CPR Compression Point for Physiological Chest Positioning

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Solution Overview

Problem

Conventional mechanical CPR devices provide non-physiological compressions by repeatedly applying pressure at a fixed location, which can lead to inadequate chest compression during prolonged resuscitations due to rescuer fatigue.

Innovation Solution

Mechanical compression devices with adjustable compression points that can change the location of chest compressions based on feedback from physiological sensors or patient positioning, allowing for optimal positioning through mechanisms like guide rods, actuators, and controllers to adjust the compression point during CPR.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If conventional mechanical CPR devices repeat compression at the same location, then compression consistency is maintained, but physiological effectiveness deteriorates

Engineering Contradiction:

Improvecompression consistencyVSAvoidphysiological effectiveness

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent implements a movable compression interface that can dynamically adjust its position on the patient's chest during CPR delivery. The compression device transitions from a static fixed-location compression system to a dynamic system capable of relocating the compression point, thereby maintaining physiological effectiveness while preserving compression consistency through controlled movement rather than fixed positioning

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system performs preliminary positioning actions by adjusting the compression interface location before delivering compressions. The device pre-positions the compression point at optimal locations based on patient anatomy and physiological feedback, then maintains this position during compression delivery, combining the benefits of consistent compression with physiologically appropriate positioning

Inventive Principle:

Principle #10Preliminary action

2Duration of action of stationary object

If mechanical compression devices are used to eliminate rescuer fatigue, then compression duration is extended, but adaptability to patient changes deteriorates

Engineering Contradiction:

Improvecompression durationVSAvoidadaptability to patient changes

Core Design Contradiction:

Duration of action of stationary objectVSAdaptability or versatility

Solution Approach 1:

The patent incorporates physiological sensors that continuously monitor patient responses during CPR and provide feedback to the control system. This feedback loop enables the mechanical compression device to adapt its compression point location in real-time based on changing patient physiological conditions, maintaining adaptability while operating autonomously for extended durations without rescuer intervention

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs self-adjustment of the compression interface location based on sensor feedback and control algorithms. The device autonomously monitors patient responses and repositions the compression point without requiring rescuer input, enabling prolonged operation with maintained adaptability to patient changes through self-service functionality

Inventive Principle:

Principle #25Self-service

3Reliability

If compression point is adjusted during CPR, then physiological effectiveness is improved, but device complexity increases

Engineering Contradiction:

Improvephysiological effectivenessVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the compression delivery system into separate functional modules: a movable compression interface, positioning mechanisms with guide rods and actuators, sensor systems, and control units. This segmentation allows the compression function to be decoupled from the positioning function, enabling independent optimization of each subsystem and reducing overall system complexity through modular design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces guide rods as intermediary elements that facilitate controlled movement of the compression interface along defined paths. These mechanical guides act as intermediaries between the actuation system and the compression interface, constraining movement to physiologically appropriate trajectories and simplifying the control requirements by eliminating the need for complex multi-degree-of-freedom positioning systems

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS12551400B2Mechanical compression device with adjustable compression point

Publication Date: 2026.02.17 PHYSIO CONTROL CORP

AI summary

Examples of the disclosure are directed to mechanical compression devices that can adjust a location of a compression position relative to a patient. One or more of the mechanical compression devices can adjust the compression position in an adjustment plane that is generally perpendicular to a patient. Some of the mechanical compression include support columns that have actuators that can be set asymmetrically to adjust the compression position and/or can be tilted relative to the backboard to adjust the compression position. Other examples includes mechanical compression devices that have multiple actuators that can be used to adjust the compression position as well as provide compressions.