Adjustable Head Stabilization with Fluid-Fill Pads
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Solution Overview
Problem
Existing head stabilization devices lack the necessary adjustability and versatility to securely position a patient's head in various orientations during medical procedures, particularly when the head needs to be positioned off-center or rotated relative to the sagittal plane, leading to potential movement or slippage.
Innovation Solution
A head fixation device (HFD) with an arc feature that includes a central head support, an arc member, a skull clamp, and an actuator, allowing for adjustable positioning of the skull clamp along the arc member up to 45 degrees off-center, combined with a pivotable cushion and fluid control system for pressure management, enabling secure stabilization in diverse patient positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing head stabilization devices are used, then the device structure is simple, but the device lacks adjustability and cannot securely position the head in various orientations
Solution Approach 1:
The skull clamp is made adjustable along an arc path, allowing dynamic repositioning from center to off-center positions (up to 45 degrees). This dynamic adjustability enables the device to adapt to various head orientations while maintaining a relatively simple overall structure through controlled movement rather than multiple fixed components.
Solution Approach 2:
The device is segmented into distinct functional components: a central head support, an arc member for positioning, a skull clamp for fixation, and an actuator for adjustment. This segmentation allows each component to perform its specific function independently, providing versatility without requiring complete structural redesign.
2Adaptability or versatility
If the skull clamp is positioned off-center to accommodate patient orientation, then head positioning versatility is improved, but head stabilization reliability may be compromised
Solution Approach 1:
The arc member provides a curved path for skull clamp positioning, allowing smooth transition from center to off-center positions. This curved geometry maintains optimal contact angles and stabilization forces throughout the range of motion, ensuring reliable head fixation whether positioned centrally or up to 45 degrees off-center.
Solution Approach 2:
The device allows changing the positional parameter of the skull clamp along the arc path. By adjusting the clamp's position along the curved arc rather than using linear displacement, the system maintains mechanical advantage and stabilization reliability across different positions while achieving the needed versatility.
3Reliability
If fixed pressure is applied by stabilization devices, then head stabilization is secure, but tissue trauma may occur and blood flow is restricted
Solution Approach 1:
The fluid control system enables periodic adjustment of pressure applied to the patient's head. By cycling between higher pressure (for secure stabilization) and lower pressure (to prevent tissue trauma and maintain blood flow), the system achieves both reliable fixation and patient safety through time-varying pressure control.
Solution Approach 2:
The fluid control system provides feedback-based pressure regulation, monitoring the stabilization effect and adjusting pressure levels accordingly. This feedback mechanism ensures sufficient head stabilization while preventing excessive pressure that could cause tissue damage, maintaining an optimal balance between security and patient welfare.
Data Source
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AI summary
Exemplary head stabilization devices or head fixation devices (HFDs) include lateral head supports for providing lateral support to the head of the patient. The lateral head supports include a pad with a fillable chamber where the fill amount of the material within the chamber can be adjusted or changed. This allows the pressure the lateral head supports apply to the head of the patient to be changed as desired. The material used within the pad chamber can be of any suitable type, including a gel, a liquid, a gas, a solid, and combinations of these materials.