Magnetic Locking Surgical Instrument for Contamination Control
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Solution Overview
Problem
Existing surgical instruments face issues with contamination risks due to mechanical friction particles, complexity, and safety hazards from blade locking mechanisms that can be unintentionally unlocked, leading to uncontrolled cutting.
Innovation Solution
A surgical instrument with a magnetic locking element that engages with a drive mechanism, using magnets to securely lock and unlock the tissue separating element, minimizing external openings and reducing the risk of contamination and ensuring safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical locking mechanism with protruding fingers and openings is used, then the blade can be locked and unlocked, but particles from mechanical friction can fall through openings into the wound and contaminate the surgical site
Solution Approach 1:
The patent replaces the mechanical locking system (fingers, hooks, openings) with a magnetic locking system. The magnetic locking element engages with the drive mechanism through magnetic attraction without requiring physical contact or openings in the housing, eliminating the contamination pathway while maintaining locking functionality.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the locking element and the drive mechanism. This magnetic intermediary transmits the locking force without requiring direct mechanical contact or openings, thus preventing particle contamination while achieving reliable blade retention.
2Reliability
If a mechanical locking mechanism with multiple moving parts is used, then the blade can be locked, but the mechanism becomes complex and expensive to manufacture
Solution Approach 1:
The patent replaces complex mechanical locking components (multiple fingers, springs, hooks) with a simplified magnetic locking system. The magnetic locking element interacts with the drive mechanism through magnetic fields, eliminating the need for complex mechanical interlocks and reducing the number of moving parts.
Solution Approach 2:
The patent extracts the essential locking function from the complex mechanical system and implements it through a simple magnetic attraction mechanism. By taking out only the necessary locking capability and implementing it magnetically, the design eliminates unnecessary mechanical complexity while maintaining reliability.
3Reliability
If a mechanical locking mechanism with plastic pins is used, then the blade can be locked, but the pin can break off especially under aging influences
Solution Approach 1:
The patent replaces mechanical locking elements (plastic pins, metal springs) that are susceptible to fatigue and breakage with a magnetic locking system. The magnetic locking element maintains locking force through magnetic attraction without mechanical stress concentration points, eliminating the breakage issue associated with plastic and metal components under aging.
Solution Approach 2:
The patent employs magnetic materials (such as ferromagnetic or permanently magnetizable materials) for the locking element and actuating portion. These materials provide both structural integrity and magnetic properties, creating a composite functionality that combines mechanical strength with magnetic locking capability, resistant to aging and fatigue.
4Ease of operation
If the locking mechanism uses a pin that can be manually pressed, then it can be unlocked, but it can be easily bypassed by the user without tools increasing safety risks
Solution Approach 1:
The patent replaces the manual mechanical unlocking system (pressing pins with fingers) with a magnetic actuation system. The magnetic actuating portion requires a magnetic field to actuate the locking element, which cannot be accidentally triggered by manual pressure. This eliminates the safety risk of unintentional blade release while maintaining controlled operation.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary for actuating the locking mechanism. This magnetic intermediary ensures that only magnetic forces (from the intended actuating element) can unlock the blade, preventing accidental activation by manual pressure or toolless manipulation, thus enhancing safety.
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 magnetic locking mechanism enhances the instrument's robustness and safety by preventing unintentional actuation, reducing complexity and cost, while maintaining a sealed design.
Implementation Method 1
The magnetic locking portion and/or the magnetic actuating portion has/have a magnet in order to move the locking element into the open position by means of magnetic attraction or repulsion between the magnetic locking portion and the first magnetic actuating portion
Data Source
AI summary
A surgical instrument for clamping and separating tissue has two branches, each forming a clamping jaw and a gripping element. The second branch features a separating element for separating tissue held between the jaws and a drive mechanism for driving the separating element. A locking element is movable between a locking position, in which the locking element engages with the drive mechanism in a blocking manner, and an open position in which the drive mechanism is unblocked by the locking element. The locking element has a magnetic locking portion. The first branch has a magnetic actuating portion for actuating the locking element. The locking portion and/or actuating portion has a magnet to move the locking element into the open position through magnetic attraction or repulsion between the locking portion and actuating portion when the branches approach each other, and to release actuation of the separating element.