CPR Valve System for Enhanced Blood Circulation
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Solution Overview
Problem
Current methods of cardiopulmonary resuscitation (CPR) result in poor blood flow to the heart and brain, leading to low circulation and poor outcomes, as traditional manual closed chest CPR does not effectively manage gas exchange during compressions.
Innovation Solution
Regulating gas flows by repetitively forcing respiratory gases out of the lungs during chest compressions and preventing their return, while periodically supplying oxygen to increase ventilation, using a device with a valve system that allows gas expulsion during compressions and prevents re-entry during recoils, to create more space for blood flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual closed chest CPR is used, then the method is simple and easy to perform, but blood flow to the heart and brain is very poor resulting in low circulation
Solution Approach 1:
A valve system acts as an intermediary component between the patient's airway and the external environment. The valve system includes a first valve that opens during chest compression to allow respiratory gases to exit, and a second valve that opens during chest recoil to prevent atmospheric gases from entering. This intermediary device modifies the gas exchange process to create negative pressure in the thorax, thereby enhancing blood circulation without requiring complex mechanical compression devices.
Solution Approach 2:
The invention extracts and removes respiratory gases from the thoracic cavity during chest compression through the first valve. By actively expelling these gases rather than allowing them to remain or re-enter during recoil, the system creates a volume deficit that is filled by incoming blood, thereby improving circulation. This extraction principle transforms the passive gas exchange of traditional CPR into an active process that drives blood flow.
2Volume of stationary object
If respiratory gases are prevented from re-entering the lungs during chest recoil, then more space is created for blood flow, but the system requires additional valve mechanisms to control gas flow
Solution Approach 1:
The valve system is segmented into two distinct functional valves: a first valve that operates during chest compression to allow gas exit, and a second valve that operates during chest recoil to prevent gas entry. This segmentation allows each valve to be optimized for its specific function and simplifies the control mechanism, as each valve responds to natural pressure changes during the CPR cycle without requiring complex coordination or additional control systems.
3Reliability
If oxygen-containing gas is periodically supplied to the lungs, then ventilation is provided, but the number of lung expansions with oxygen-containing gases needs to be reduced to maintain negative pressure
Solution Approach 1:
Oxygen-containing gas is supplied to the lungs in periodic intervals rather than continuously. The ventilation system delivers oxygen during specific phases of the CPR cycle when the valves are configured to allow lung expansion, and then closes the ventilation pathway during subsequent compressions and recoils to maintain negative pressure. This periodic action ensures adequate ventilation while preserving the circulation-enhancing negative pressure effect during the majority of the CPR cycle.
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
This method increases blood circulation and reduces intracranial pressures, enhancing cerebral perfusion pressure and improving the duration and magnitude of blood flow to vital organs during CPR.
Implementation Method 1
a first valve that opens during chest compression to allow respiratory gases to exit, and a second valve that opens during chest recoil to prevent atmospheric gases from entering
Implementation Method 2
repetitively compressing the chest and permitting the chest to recoil
Implementation Method 3
Every time the chest wall recoils following a compression, air (or respiratory gases) from outside the patient is prevented from passively entering the lungs
Data Source
AI summary
A method for regulating gas flows into and out of a patient includes repetitively forcing respiratory gases out of the lungs. Respiratory gases are prevented from entering back into the lungs during a time between when respiratory gases are forced out of the lungs. Periodically, an oxygen-containing gas is supplied to the lungs.