CPR Elevation Device for Cerebral Perfusion
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Solution Overview
Problem
Conventional cardiopulmonary resuscitation (CPR) methods are inefficient in providing adequate blood flow to the brain and heart, leading to reduced cerebral perfusion and increased intracranial pressure, which can cause further brain damage during cardiac arrest.
Innovation Solution
The use of a system and method that elevates the patient's head and thorax during CPR, utilizing an elevation device with a pivotable and expandable upper support to maintain the head and thorax in a position that reduces right-atrial pressures and intracranial pressure while increasing cerebral perfusion pressure and systolic blood pressure, thereby improving blood flow and reducing pulmonary vascular resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional closed-chest CPR is performed with the patient in a supine position, then chest compressions can be applied to propel blood to the brain and heart, but cerebral perfusion is reduced and intracranial pressure increases
Solution Approach 1:
The patent applies dimensionality change by transitioning the patient from a horizontal supine position to an elevated head-of-bed position (30-45 degrees). This spatial repositioning fundamentally alters the gravitational forces acting on blood flow, enabling simultaneous improvement of cerebral perfusion and cardiac output while reducing intracranial pressure, thereby resolving the contradiction between blood flow productivity and harmful pressure effects on the brain
2Productivity
If chest compressions are performed repeatedly, then blood can be propelled to vital organs, but right-sided heart and venous pressures rise to levels identical to arterial pressure
Solution Approach 1:
The patent applies the counterweight principle by using gravity as a counterforce to the pressure generated during chest compressions. By elevating the patient's head and upper body, gravity creates a downward force that opposes the upward pressure waves in the venous system, thereby reducing right-sided heart and venous pressures while maintaining effective blood propulsion during compressions
3Duration of action of stationary object
If conventional CPR is performed for extended periods, then resuscitation can continue, but effectiveness decreases and complications increase
Solution Approach 1:
The patent applies parameter changes by systematically modifying the positional parameters of the patient during CPR. By maintaining the head-of-bed elevation at 30-45 degrees throughout extended resuscitation, the patent creates sustained favorable hemodynamic conditions that preserve CPR effectiveness over time, preventing the deterioration that occurs with conventional supine positioning during prolonged procedures
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 approach enhances cerebral and cardiac perfusion, allowing for more effective and safe CPR over extended periods by maintaining optimal blood flow and reducing complications associated with endotracheal intubation.
Implementation Method 1
gravity drains venous blood from the brain to the heart
Data Source
AI summary
An elevation device used in the performance of cardiopulmonary resuscitation (CPR) includes a base and an upper support pivotably coupled to the base. The upper support is configured to elevate the individual's upper back, shoulders and head when pivoted. The upper support is expandable lengthwise. The upper support includes a neck support that is configured to support the individual's spine in a region of the individual's C7 and C8 vertebrae throughout elevation of the upper back, shoulders and head.