Oscillating Blade Tissue Resection Device
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Solution Overview
Problem
Current surgical instruments for resecting soft tissue or bone in constrained environments, such as minimally-invasive procedures, suffer from poor ergonomics leading to musculoskeletal disorders, reduced accuracy, and risk of nerve damage due to inadequate cutting precision and obstruction of the surgical site, with existing devices often requiring multiple passes and causing tissue damage.
Innovation Solution
A powered cutting system with an oscillating or continuously rotating blade that utilizes a mechanical transmission or oscillator to achieve high-frequency oscillations, reducing nerve damage and tissue destruction, and features like a crescentic blade design and depth adjustment mechanism to improve precision and visibility during tissue resection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating blade is used for tissue resection, then cutting speed is improved, but nerve damage risk increases due to tissue tangling and excessive strain
Solution Approach 1:
The patent applies mechanical vibration by oscillating the cutting blade at high frequency (e.g., 20,000-80,000 oscillations per minute) with small angular displacement. This oscillating motion allows the blade to vibrate through tissue rapidly without rotating, preventing nerve tissue from wrapping around the blade and reducing excessive strain on nerves while maintaining efficient cutting speed.
2Productivity
If a burr is used to grind tissue, then resection is achieved, but tissue is pulverized destroying its integrity
Solution Approach 1:
The oscillating blade cuts tissue through rapid back-and-forth motion rather than grinding, preserving tissue integrity by slicing through it cleanly. This vibration-based cutting mechanism removes tissue in controlled sections rather than pulverizing it, maintaining the structural integrity of resected tissue for potential autograft use.
3Object-affected harmful factors
If the surgical site is accessed through narrow ports, then minimally-invasive benefits are achieved, but instrument operation difficulty increases
Solution Approach 1:
The device is segmented into modular components including a handle, shaft, and oscillating blade assembly that can be inserted through narrow ports. The oscillating mechanism is contained within a compact housing that fits through minimally-invasive access points, while the cutting function is separated into a distinct blade assembly that can be positioned precisely at the target site.
Solution Approach 2:
The patent replaces manual mechanical cutting operations with a powered oscillating blade system. An electric motor or other power source drives the oscillating mechanism, eliminating the need for the surgeon to manually operate the cutting element. This substitution provides consistent high-frequency oscillation without requiring significant manual force, making the instrument easier to operate through constrained access.
4Device complexity
If manual operation is used, then device simplicity is maintained, but resection speed decreases and surgeon fatigue increases
Solution Approach 1:
The patent introduces a powered oscillating blade system where an electric motor or other power source replaces manual surgical operations. The power source drives the oscillating mechanism at high frequency, dramatically increasing resection speed while reducing the physical effort required by the surgeon. This mechanical substitution maintains relative device simplicity while achieving superior productivity.
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 enhances cutting efficiency and accuracy, reduces musculoskeletal strain for surgeons, minimizes nerve damage, and allows for precise tissue removal without pulverizing the tissue, thereby improving the safety and effectiveness of minimally-invasive surgical procedures.
Implementation Method 1
a powered cutting system with an oscillating or continuously rotating blade, or an axially oscillating blade, to manipulate the border of targeted tissue
Implementation Method 2
utilize a mechanical transmission or oscillator to achieve high-frequency oscillations
Data Source
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Figure 3A
AI summary
Embodiments of bone and tissue resection devices are disclosed herein. In one embodiment, a device can include a blade (300) having a distal cutting edge configured to perform a cutting action that produces a plug or core from a media being cut by the cutting edge, a drive mechanism (20) arranged to transfer an oscillating force to the cutting edge for oscillating the cutting edge, a shield positioned (250) to block contact with a portion of the cutting edge, and a depth adjustment mechanism (730) configured to translate the cutting edge along a proximal-distal axis of the shield to adjust an axial position of the cutting edge relative to the shield.