Counter-Oscillating Surgical Saw Blades for Precise Bone Cutting
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Solution Overview
Problem
Surgical saws face challenges in applying high torque for precise cutting while preventing the object from oscillating in harmony with the saw, and existing solutions fail to provide a secure and independent connection mechanism for saw blades that can be easily removable and reusable.
Innovation Solution
A saw blade with a resiliently biased projection and a complementary angled attachment portion, combined with a connection mechanism featuring a mounting member with a receiving surface and raised portion, allows for secure connection and easy removal, and a saw design with opposing blades oscillating at high torque and reduced speed to prevent object oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high torque is applied to the bone by the saw blade, then cutting precision is improved, but the object to be cut may oscillate in harmony with the saw
Solution Approach 1:
The patent employs counter-balanced oscillating saw blades where the momentum produced by one blade is offset by momentum produced by its counterpart cutting blade. This counterweight mechanism reduces mechanical vibration and prevents the bone from oscillating in harmony with the saw, thereby maintaining cutting precision while applying high torque.
2Loss of time
If disposable blades are used to avoid sterilizing the whole saw, then time and cost are reduced, but the blade must be securely connected to the handpiece during use
Solution Approach 1:
The saw system is divided into separable components: a reusable handpiece and disposable blades. This segmentation allows the blade to be easily removed and replaced without sterilizing the entire saw, saving time. The blade includes an attachment portion with a projection that securely connects to the handpiece during use, ensuring reliability despite the disposable nature.
Solution Approach 2:
The blade includes a resiliently biased projection that automatically engages with the handpiece during insertion and secures itself without requiring additional components or complex assembly procedures. This self-service mechanism ensures secure connection while maintaining ease of replacement.
3Productivity
If the blade is easily removable for processing, then blade replacement efficiency is improved, but the connection mechanism must still prevent blade loosening during cutting
Solution Approach 1:
The connection mechanism features a resiliently biased projection that dynamically adapts during insertion and operation. The projection is resiliently biased into a position extending away from the blade surface, allowing easy insertion, then engages with the handpiece to prevent loosening during cutting. This dynamic behavior enables both easy removal and secure connection.
Solution Approach 2:
The projection automatically engages with the handpiece during insertion and secures the blade without requiring additional locking components. The resilient bias ensures the projection maintains engagement during use but allows easy release when needed, providing self-service secure connection and release.
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 solution enables high-torque cutting with reduced vibration, allowing for precise bone cutting and easy blade replacement, enhancing surgical efficiency and safety.
Implementation Method 1
a projection that extends from the blade and is resiliently biased into a position in which it extends away from a surface of the blade
Data Source
AI summary
The present disclosure relates to a saw, comprising a drive, a first blade configured to oscillate about an axis perpendicular to a plane defined by a surface of the first blade, a second blade configured to oscillate about an axis perpendicular to the plane in a direction opposite to that of the first blade, and wherein gearing is provided between the drive and the first and second blades to reduce the speed transmitted from the drive to the blades. A saw blade, a connection mechanism for connecting a blade to a saw and associated methods are also provided.