Subdural Hematoma Evacuation Bolt with Pump and Sensors
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Solution Overview
Problem
Current methods for evacuating subdural hematomas, such as burr holes and minimally-invasive bolts, often result in recurrence, necessitating alternative systems and methods for effective drainage and brain re-expansion.
Innovation Solution
A system comprising small diameter intracranial bolts for both irrigation and evacuation, with a pump creating negative pressure and monitoring sensors to ensure safe and complete drainage, minimizing the risk of air introduction and promoting brain re-expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If small diameter intracranial bolts are used for minimally invasive drainage, then ease of operation and reduced invasiveness are improved, but drainage effectiveness and reliability deteriorate due to clogging and inability to evacuate thick clot material
Solution Approach 1:
The drainage system is segmented into multiple functional components: a larger diameter evacuation port for reliable clot removal, a separate smaller irrigation port for fluid delivery, and a pump system for controlled negative pressure application. This segmentation allows each component to perform its specific function optimally without compromise.
Solution Approach 2:
A pump system acts as an intermediary mechanism between the external environment and the subdural space, providing controlled negative pressure to facilitate evacuation through the small diameter bolt while preventing direct introduction of air or contaminants. The pump mediates the pressure differential needed for effective drainage without requiring large opening.
2Productivity
If negative pressure is applied to evacuate hematoma, then evacuation effectiveness is improved, but risk of air introduction and pneumocephalus increases
Solution Approach 1:
The pump system serves as a controlled intermediary that generates negative pressure without directly connecting the external environment to the subdural space. This mediation allows effective evacuation while maintaining a closed system that prevents air introduction.
Solution Approach 2:
The system incorporates sensors that provide feedback on pressure levels, flow rates, and evacuation progress. This feedback mechanism allows real-time monitoring and adjustment of negative pressure application, stopping before conditions that would cause air introduction or pneumocephalus are reached.
3Reliability
If brain is allowed to re-expand into subdural space, then neurological recovery is improved, but risk of recurrent hematoma formation increases
Solution Approach 1:
The system maintains continuous controlled negative pressure applied to the subdural space over an extended period after initial evacuation. This continuous action prevents brain re-expansion into the subdural space, maintaining the space available and preventing recurrent hematoma formation while allowing neurological recovery.
Solution Approach 2:
The system dynamically adjusts the negative pressure parameter over time, starting with higher pressure for initial evacuation and gradually reducing to maintenance levels. This parameter change allows effective initial evacuation while preventing over-compression that could damage brain tissue or cause recurrence.
4Reliability
If monitoring sensors and controlled pump systems are added, then safety and control are improved, but device complexity increases
Solution Approach 1:
The pump system performs multiple functions: generating negative pressure for evacuation, controlling flow rates, monitoring pressure levels, and preventing air introduction. By making the pump multi-functional, the system achieves high safety and control without proportionally increasing overall complexity.
Solution Approach 2:
The system incorporates sensors that automatically monitor and provide feedback on system parameters, enabling self-regulation and reducing the need for complex external control mechanisms. The system essentially monitors and adjusts itself based on real-time conditions.
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 provides a minimally invasive, effective, and controlled method for evacuating subdural hematomas, reducing recurrence risk, minimizing pneumocephalus, and facilitating rapid brain re-expansion and neurological recovery.
Implementation Method 1
the outlet is in fluid communication with a pump that creates negative pressure within the subdural space to draw out liquid and other materials from the space
Implementation Method 2
the negative pressure may also help re-expand the brain back into the subdural space that was previously occupied by the hematoma
Data Source
AI summary
In one embodiment, a system for evacuating subdural hematomas includes an inlet configured to be placed in fluid communication with a subdural space, an irrigation reservoir in fluid communication with the inlet and configured to supply irrigation fluid to the inlet and the subdural space, an outlet separate from the inlet and also configured to be placed in fluid communication with the subdural space, and a pump in fluid communication with the outlet and configured to create negative pressure within the subdural space and evacuate fluid from the subdural space.