Lockable Surgical System Magnetic Guidance

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Solution Overview

Problem

Existing surgical robots for bone cutting are invasive, bulky, and require complex mechanical coupling with the bone, leading to potential bone damage and inaccuracies in cutting planes.

Innovation Solution

A surgical system comprising a base unit secured to the operation table, a manually displaced machining tool, a lockable unit with linked displaceable elements, and a constraining device to guide the machining tool within predetermined machining planes, all controlled by a sensor and control unit to ensure precise and safe machining.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a mechanical guide is firmly attached to the bone using supporting means and screws, then the cutting plane guidance is effective, but the solution becomes very invasive and requires significant time for mechanical coupling

Engineering Contradiction:

Improvecutting plane guidance precisionVSAvoidinvasiveness and bone damage

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent removes the invasive mechanical coupling components (screws, supporting means firmly attached to bone) and replaces them with a magnetic field-based guidance system. The magnetic field is generated externally and guides the machining tool without requiring physical attachment to the bone, thus extracting the harmful mechanical coupling while preserving the cutting plane guidance precision.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical guidance system (screws, physical supporting means) with a magnetic field-based guidance system. The magnetic field serves as the new mechanism for guiding the machining tool, substituting the mechanical coupling with a non-contact magnetic interaction that eliminates bone damage while maintaining positioning accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If a positioning device with multiple positioning elements is used to adjust the cutting guide, then the positioning accuracy is improved, but the device takes up significant space and is more invasive

Engineering Contradiction:

Improvepositioning accuracyVSAvoiddevice size and invasiveness

Core Design Contradiction:

Manufacturing precisionVSVolume of moving object

Solution Approach 1:

The patent extracts the multiple physical positioning elements and replacing them with a magnetic field-based positioning system. The magnetic field provides the necessary positioning information without requiring bulky mechanical components, thus reducing device volume and invasiveness while maintaining positioning accuracy.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent substitutes the mechanical positioning system (multiple positioning elements, articulated connections) with a magnetic field-based positioning system. This substitution eliminates the need for bulky mechanical structures while providing precise positioning through magnetic field sensing and control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Force

If large pins are implanted into the bone to bear the weight of the robot, then the robot can be supported, but the pins can generate bone fracture and impact accuracy

Engineering Contradiction:

Improveweight bearing capacityVSAvoidbone fracture risk and accuracy impact

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent removes the large pins that are implanted into the bone and replaces them with an external magnetic field support system. The magnetic field provides the necessary force and positioning without requiring invasive pin insertion, thus eliminating bone fracture risk while maintaining the ability to support and position the machining tool accurately.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent substitutes the mechanical pin-based support system with a magnetic field-based support system. The magnetic field provides the necessary holding force and positioning without physical contact with the bone, replacing the invasive mechanical pins with a non-contact magnetic interaction that eliminates bone damage while maintaining force bearing capacity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3975908B1Lockable surgical system

Publication Date: 2025.01.22 GANYMED ROBOTICS

Figure 1a~1c
Figure 2a
Figure 2b~2c

AI summary

The present invention relates to a surgical system (10) comprising: - a machining tool (16) aimed at being manually displaced by an operator, - a lockable unit (20) including at least two linked and manually displaceable elements (23, 24, 26, 28) aimed at being manually arranged according to a least one calculated locked configuration, - a sensor unit (32) including at least one sensor aimed at following, in real time, a real time configuration of the lockable unit (20) within an anatomical reference system, where the at least two elements (23, 24, 26, 28) of the lockable unit (20) cooperate with lockable means, said lockable means being configured to be activated by a control unit (12) when the real time configuration of the lockable unit (20) corresponds to the at least one locked configuration recorded inside the control unit (12).