Brain Injury Reduction System Using Valsalva Maneuver
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional helmet designs fail to effectively reduce brain injury from sudden decelerating or accelerating head movements, as they do not adequately limit distortion or deformation of brain tissues during impacts or blast forces, leading to continued risk of brain injury despite external energy attenuation.
Innovation Solution
A brain injury reduction system that impedes venous drainage to reduce brain movement within the calvarium by using wearable devices to compress jugular veins or induce a Valsalva maneuver, increasing cerebral venous congestion and the stiffness of brain tissues, thereby reducing susceptibility to deformation during head impacts or blasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional helmets are designed to attenuate external energy transfer to the head, then skull fracture protection is improved, but brain injury from sudden decelerating or accelerating head movements is not effectively reduced
Solution Approach 1:
The helmet system is divided into multiple functional layers: an outer rigid shell for skull protection, an intermediate shock-absorbing layer, and an inner compliant liner with brain-contacting elements. This segmentation allows each layer to address specific injury mechanisms independently, with the inner layer specifically targeting brain motion reduction through gel-coated elements that conform to brain contours.
Solution Approach 2:
A compliant intermediate layer with shock-absorbing material is introduced between the rigid outer shell and the brain-contacting inner elements. This intermediary layer attenuates acceleration forces before they reach the brain, reducing inertial brain motion while maintaining the structural integrity needed for skull protection.
2Strength
If rigid exterior helmets are used to protect the skull, then skull fracture resistance is improved, but brain tissue distortion during impact is not limited
Solution Approach 1:
The inner surface of the helmet features localized gel-coated elements distributed across the brain-contacting surface. These elements provide locally adapted compliance and shock absorption at specific high-risk areas (such as the frontal and occipital regions), allowing the helmet to limit brain tissue distortion at critical locations while maintaining overall skull protection.
Solution Approach 2:
The inner helmet layer incorporates flexible gel-coated elements that conform to the brain's surface contours. These flexible elements move with the brain during impact, reducing relative motion and tissue distortion, while the outer rigid shell maintains structural strength for skull protection.
3Strength
If flexible exterior shock absorbing multilayer helmet designs are used, then skull protection is improved, but brain motion during sudden deceleration is not adequately limited
Solution Approach 1:
The gel-coated inner elements are pre-positioned to conform to the brain's surface before impact occurs. This preliminary configuration ensures immediate contact and motion limitation from the onset of deceleration, reducing the brain's inertial movement within the skull during sudden impacts.
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 system effectively reduces brain injury at both macroscopic and microscopic levels by minimizing brain motion and deformation, providing protection against sudden head movements or blast forces through increased intracranial stiffness.
Implementation Method 1
A brain injury reduction system that impedes venous drainage to reduce brain movement within the calvarium by using wearable devices to compress jugular veins
Implementation Method 2
induce a Valsalva maneuver, increasing cerebral venous congestion and the stiffness of brain tissues
Data Source
AI summary
A brain injury reduction system provides a protective measure to reduce severity of brain injury caused by collision or blast. A sensing device of the system detects an impending or occurring event (e.g., collision or blast) in an environment surrounding the individual and sends information about the event to a controller of the system. The sensing device can be stationary or moves with the individual. Based on the information, the controller determines whether the event will likely cause brain injury to the individual. If so, the controller sends an instruction to an actuation device of the system to activate the protective measure. The actuation device uses transcutaneous electrodes to electrically simulate glottis closure and contraction of the abdominal musculature to induce a Valsalva-like maneuver. The Valsalva-like maneuver can increases the stiffness of the brain tissues in the intracranial compartment, and thus reduces the susceptibility of the brain tissues to deformation.