Mechanical CPR Contact Member with Frequency-Responsive Adhesion
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Solution Overview
Problem
Conventional CPR chest compression machines face issues with contact members sliding or disconnecting from the patient's chest, leading to ineffective compressions and potential injury, especially during active decompression, due to factors like hairy skin or chest topology.
Innovation Solution
The mechanical CPR device employs a pressure pad or suction cup with a semi-adhesive material that adheres to the patient's chest, ensuring stable contact and marking initial placement, and a controller that manages compression and decompression cycles, enhancing adherence and preventing displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional contact member (pressure pad or suction cup) is used on the piston, then the device can perform chest compressions, but the contact member may slide or disconnect during CPR due to hairy skin or chest topology
Solution Approach 1:
The patent applies a semi-adhesive material on the contact member surface that changes its adhesive properties based on compression frequency. At low frequencies (<60 compressions per minute), the material has low adhesiveness to allow easy application and removal. At high frequencies (>60 compressions per minute), the material develops high adhesiveness to prevent sliding and disconnection, thereby resolving the contradiction between reliability and harmful factors.
2Stability of the object's composition
If the contact member is firmly attached to prevent sliding, then stability is improved, but it may cause skin injury or discomfort during active decompression
Solution Approach 1:
The semi-adhesive material dynamically adjusts its adhesive strength based on the compression frequency. During active decompression phases, the material maintains sufficient adhesion to prevent disconnection but allows controlled movement. The dynamic nature of the material enables it to provide stability when needed while minimizing harmful effects during decompression phases.
3Ease of operation
If manual CPR is performed by trained rescuers, then some level of effectiveness can be achieved, but rescuers become quickly fatigued and performance degrades
Solution Approach 1:
The patent replaces the mechanical action of manual chest compressions with an automated mechanical CPR device. The device uses a motor-driven piston to perform compressions consistently without fatigue, while the semi-adhesive contact member ensures reliable skin contact throughout the procedure. This substitution eliminates rescuer fatigue while maintaining or improving CPR quality.
4Reliability
If the contact member uses high adhesion material to prevent sliding, then stability is improved, but it becomes difficult to apply and remove the contact member
Solution Approach 1:
The semi-adhesive material exhibits periodic changes in adhesive properties corresponding to the CPR compression cycles. During compression phases, the material engages with the skin with appropriate adhesion. During decompression and transition phases, the adhesive strength reduces, facilitating easy application and removal. This periodic behavior resolves the contradiction between maintaining adherence and ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution maintains consistent and effective chest compressions by stabilizing the contact member, reducing the risk of injury and ensuring proper active decompression, thereby improving CPR efficacy.
Implementation Method 1
The material can include an adhesion material to increase the sealing effect between a target contact area of the patient's skin and the contact member
Implementation Method 2
During active decompression in examples of a CCCM with a piston with a suction cup, the suction cup creates a vacuum with the patient's chest and applies a force directed away from the anterior surface of the patient's chest
Data Source
AI summary
A mechanical CPR device having one or more of a piston, a driving component configured to extend the piston toward a patient's torso and retract the piston away from the patient's torso, a controller configured to control the driving component to at least compress the patient's torso by extending the piston from a reference position to a depth and retracting the piston from the depth to the reference position, and a contact member such as one or more of a pressure pad and a suction cup attached to the end of the piston. The contact member can include a semi-adhesive material that has low adhesiveness when the controller controls the driving component to compress the patient's torso less than 60 times per minute and high adhesiveness when the controller controls the driving component to compress the patient's torso more than 60 times per minute.