Static-Rail Medical Cutting Devices for Consistent Bone Cuts
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Solution Overview
Problem
Oscillating saw blades in orthopedic procedures face issues such as inconsistent cuts, uneven surfaces, thermal necrosis, vibration, and lack of real-time feedback, leading to compromised surgical accuracy and patient safety.
Innovation Solution
The development of medical cutting devices with integrated static components, working blade bodies, rails, struts, and channels for fluid and gas flow, along with robotic arm attachment capabilities, which include sensors for temperature, strain, pressure, and vibration feedback, enabling precise cutting and drilling with real-time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional oscillating saw blades are used for bone cutting, then the cutting process can be completed, but the cuts are inconsistent and produce uneven surfaces
Solution Approach 1:
The blade is segmented into multiple sections with varying properties. The proximal portion has different characteristics than the distal portion, allowing each segment to perform optimally for its specific function. This segmentation enables consistent cut quality while maintaining overall blade reliability
Solution Approach 2:
Different portions of the blade are given different local qualities - the proximal portion has specific properties for stability and control, while the distal portion has properties optimized for precise cutting. This local differentiation resolves the contradiction by ensuring each part contributes to both cut consistency and surgical accuracy
2Productivity
If high-speed oscillation is used to increase cutting efficiency, then productivity improves, but heat generation increases causing thermal necrosis
Solution Approach 1:
The blade design converts the harmful heat generated by high-speed oscillation into a beneficial effect by using the heat to sterilize the blade during the cutting process. The high-speed oscillation that would normally cause thermal necrosis is instead harnessed to achieve therapeutic sterilization, resolving the contradiction between cutting efficiency and thermal damage
Solution Approach 2:
The blade's physical parameters are optimized to change during operation - the oscillation speed and amplitude are controlled to generate sufficient heat for sterilization while remaining below the threshold for thermal necrosis. This parameter optimization allows high cutting efficiency while preventing harmful thermal effects
3Productivity
If oscillating blades are used for cutting, then the cutting function is achieved, but significant vibration is generated disrupting surgical control
Solution Approach 1:
The blade system transitions from a static traditional design to a dynamic system with active vibration control. Sensors detect vibration patterns and the system dynamically adjusts blade parameters to maintain cutting efficiency while minimizing disruptive vibrations, resolving the contradiction between cutting function and surgical control
4Reliability
If traditional disposable saw blades are used, then each procedure can be completed with a new blade, but cost sensitivity increases due to continuous purchasing
Solution Approach 1:
Instead of discarding the entire blade after one use, the system recovers and reuses the blade multiple times through automated sterilization and maintenance protocols. This resolves the contradiction by maintaining blade freshness for reliability while reducing purchasing complexity and costs through blade recovery and reuse
5Extent of automation
If robotic systems with basic saw blades are used, then automated cutting can be performed, but real-time feedback capability is lost
Solution Approach 1:
The robotic system is equipped with sensors that provide real-time feedback on cutting parameters, bone density, and blade performance. This feedback loop allows the automated system to adjust its operation dynamically, resolving the contradiction between automation and information loss by enabling the robotic system to sense and respond to 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
Enhances surgical precision, reduces thermal damage, and provides real-time feedback for consistent cuts, improving surgical outcomes and patient safety by addressing the limitations of traditional saws and drills.
Implementation Method 1
The static component defines at least one channel that extends between a port and an opening at a distal end of the static component for delivering fluid from the source of fluid via the at least one channel and out of the opening
Implementation Method 2
The static component is configured for operable connection to the source of aspiration for removing fluid via the at least one channel through the opening and out towards the aspiration source
Implementation Method 3
sensors for temperature, strain, pressure, and vibration feedback, enabling precise cutting and drilling with real-time adjustments
Implementation Method 4
sensors for temperature, strain, pressure, and vibration feedback, enabling precise cutting and drilling with real-time adjustments
Data Source
AI summary
Medical cutting devices having static components, working blade bodies, rails, struts, channels for fluid and gas flow, and hand-piece and robotic arm attachment capabilities are disclosed. According to an aspect, a cutting device includes a working blade body being configured for operable connection to a source of movement. The cutting device also includes a static component being configured for operable connection to the source of movement. The static component comprises at least one rail, wherein the at least one rail extends substantially the same length as the working blade body.