Fiber-Array Laser Blade for Precise Bone Ablation
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Solution Overview
Problem
Conventional mechanical instruments for bone resection cause thermal necrosis, microcracking, and debris generation, complicating surgical outcomes and recovery.
Innovation Solution
A laser-based resection tool with optical fibers, fluid delivery, and real-time feedback systems for precise and efficient bone cutting, minimizing thermal and mechanical damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional mechanical instruments (oscillating saws, rotary burrs) are used for bone resection, then bone removal efficiency is achieved, but thermal necrosis, microcracking, and debris generation occur
Solution Approach 1:
The patent replaces mechanical cutting instruments (oscillating saws, rotary burrs) with a laser-based system that uses photothermal ablation to remove bone tissue. The laser energy is delivered through optical fibers arranged in arrays, converting mechanical cutting to optical-thermal ablation, thereby eliminating mechanical trauma and reducing thermal necrosis through precise energy control
Solution Approach 2:
The patent employs pulsed laser delivery with controlled pulse duration, repetition rate, and fluence to achieve precise bone ablation. By adjusting laser parameters (wavelength, pulse width, energy density), the system optimizes bone removal efficiency while minimizing thermal damage to surrounding tissues, resolving the contradiction between productivity and harmful thermal effects
2Productivity
If mechanical cutting instruments are used, then bone resection is performed, but significant heat generation causes tissue necrosis
Solution Approach 1:
The patent substitutes mechanical friction-based cutting with laser photothermal ablation, where laser energy is absorbed by bone tissue and converted to heat locally at the focal point. This allows precise temperature control through pulsed delivery, achieving effective bone removal while maintaining surrounding tissue temperature within safe limits
Solution Approach 2:
The system uses pulsed laser delivery instead of continuous energy application. By controlling pulse duration and repetition rate, the system allows thermal diffusion between pulses, preventing excessive heat accumulation and tissue necrosis while maintaining effective ablation during pulse periods
3Productivity
If mechanical instruments are used for bone cutting, then bone removal is achieved, but irregular crack propagation and bone chip formation occur
Solution Approach 1:
The patent replaces mechanical cutting forces that cause crack propagation and bone chip formation with laser ablation that vaporizes and removes bone tissue through controlled photothermal decomposition. This results in cleaner cut surfaces without mechanical fracturing or irregular crack patterns
Solution Approach 2:
The laser energy is concentrated at the focal point where optical fibers are positioned, creating localized ablation with precise spatial control. This allows clean removal of bone tissue at the target site while leaving surrounding areas unaffected, achieving high manufacturing precision in terms of cut surface quality
4Productivity
If mechanical resection is performed, then bone debris is generated, but bone chips impede regeneration and present biohazard risk
Solution Approach 1:
The patent replaces mechanical cutting that generates bone chips and debris with laser ablation that vaporizes bone tissue into fine particulate matter and gas. This eliminates large bone chips that impede regeneration, and the fine debris can be more easily managed and removed from the surgical site
Solution Approach 2:
The laser energy causes phase transitions in bone tissue, heating it to temperatures where organic components vaporize and mineral components melt or decompose. This transforms solid bone into vapor and fine particulate matter, eliminating the formation of problematic bone chips and reducing biohazard risks from aerosolized debris
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 laser-based tool achieves precise, efficient bone resection with minimal thermal and mechanical trauma, reducing complications and accelerating recovery.
Implementation Method 1
a laser source configured to emit a laser beam; a plurality of optical fibers, each optical fiber having a proximal end optically coupled to the laser source and a distal end configured to emit the laser beam from the laser source
Data Source
AI summary
A device for resecting hard biological tissue is provided. The device comprises a laser source configured to emit a laser beam, and a plurality of optical fibers, each having a proximal end optically coupled to the laser source and a distal end configured to emit the laser beam. A support structure maintains the distal ends of the optical fibers in a predetermined spatial arrangement. A window is positioned to permit transmission of the laser beam from the distal ends toward the tissue. At least one spacing element is associated with the support structure to maintain a predetermined distance between the distal ends and the tissue during operation. The device further includes a fluid delivery system associated with the support structure and configured to deliver a fluid to a cutting interface at the tissue. The arrangement enables precise, efficient, and controlled laser ablation or resection of hard tissue, with improved cooling and debris management.