Articulating Clamp Kit Converts Hexapod Frames for X-Ray Visualization
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Solution Overview
Problem
Hexapod external fixation systems face challenges such as obscured X-ray visualization due to strut arrangement, frame destabilization during strut removal, non-axial dynamization, and limited angulation in static frames, which complicate bone alignment and healing processes.
Innovation Solution
A kit comprising articulating clamps and rods is used to convert a hexapod external fixation system into a static frame, providing increased visualization and working windows, and enabling flexible frame construction with enhanced angulation and dynamization options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If struts are removed to provide larger visualization and working windows, then X-ray visualization and surgical access are improved, but frame stability is compromised
Solution Approach 1:
The patent introduces a temporary support strut as an intermediary element that replaces the removed strut during critical procedures. This support strut maintains frame stability while allowing removal of other struts for improved visualization and working access. The temporary support can be quickly installed and removed without compromising overall frame integrity.
Solution Approach 2:
The patent implements a dynamic conversion system where the external fixator can be transformed from a hexapod configuration to a static frame configuration by removing struts and installing conversion kits. This dynamic adaptability allows the frame to transition between stabilized and decompressed states based on procedural needs, balancing stability requirements with visualization and access requirements.
2Adaptability or versatility
If hexapod system is used to provide polyaxial movement and adjustment, then bone alignment flexibility is improved, but X-ray visualization is obscured
Solution Approach 1:
The patent segments the bone alignment function into two phases: initial alignment using the hexapod system's polyaxial adjustment capabilities, and subsequent consolidation using a static frame configuration. By converting from hexapod to static frame after initial alignment, the system maintains alignment flexibility when needed while improving X-ray visualization during healing.
Solution Approach 2:
The patent inverts the conventional approach by starting with a dynamic hexapod system for alignment and then converting to a static frame for consolidation, rather than beginning with a static frame. This reverse sequence allows the system to provide maximum flexibility during alignment when it's most needed, then transition to improved visualization during the healing phase.
3Device complexity
If static frame is constructed with limited angulation options, then frame construction simplicity is improved, but adaptability to different bone positions is reduced
Solution Approach 1:
The patent applies preliminary action by using the hexapod system's adjustable struts to achieve proper bone alignment and angulation before converting to the static frame. This preliminary alignment phase allows complex positioning adjustments to be made when needed, then locked in place during the conversion to the simpler static frame configuration.
Solution Approach 2:
The patent utilizes parameter changes by adjusting strut lengths and angles in the hexapod system to achieve optimal bone positioning before conversion. These parameter adjustments are made during the dynamic phase when flexibility is available, then maintained in the static frame configuration, combining the benefits of adjustability with construction simplicity.
Data Source
AI summary
A kit and corresponding methods of use are disclosed. In use, the kit includes a plurality of articulating clamps for coupling to one of the rings of an external fixation system. In use, the clamps include a body portion having a stem arranged and configured to be received within an opening formed in one of the rings. The clamp further including a clamp assembly for engaging a rod spanning the first and second rings. Thus arranged, the clamp may be directly coupled to one of the rings and the rod, the clamp enabling the position of the ring to be adjusted relative to the rod. As such, the clamps may enable, inter alia, a hexapod external fixation system to be converted into a static frame, a static frame to be constructed in a more efficient manner, and/or creation of an enlarged visualization or working window.