Back to Search
Start Over
Optical fibers for endoscopic high-power Er:YAG laserosteotomy
- Source :
- Journal of Biomedical Optics
- Publication Year :
- 2021
-
Abstract
- Significance: The highest absorption peaks of the main components of bone are in the mid-infrared region, making Er:YAG and CO2 lasers the most efficient lasers for cutting bone. Yet, studies of deep bone ablation in minimally invasive settings are very limited, as finding suitable materials for coupling high-power laser light with low attenuation beyond 2 μm is not trivial. Aim: The first aim of this study was to compare the performance of different optical fibers in terms of transmitting Er:YAG laser light with a 2.94-μm wavelength at high pulse energy close to 1 J. The second aim was to achieve deep bone ablation using the best-performing fiber, as determined by our experiments. Approach: In our study, various optical fibers with low attenuation (λ=2.94 μm) were used to couple the Er:YAG laser. The fibers were made of germanium oxide, sapphire, zirconium fluoride, and hollow-core silica, respectively. We compared the fibers in terms of transmission efficiency, resistance to high Er:YAG laser energy, and bending flexibility. The best-performing fiber was used to achieve deep bone ablation in a minimally invasive setting. To do this, we adapted the optimal settings for free-space deep bone ablation with an Er:YAG laser found in a previous study. Results: Three of the fibers endured energy per pulse as high as 820 mJ at a repetition rate of 10 Hz. The best-performing fiber, made of germanium oxide, provided higher transmission efficiency and greater bending flexibility than the other fibers. With an output energy of 370 mJ per pulse at 10 Hz repetition rate, we reached a cutting depth of 6.82±0.99 mm in sheep bone. Histology image analysis was performed on the bone tissue adjacent to the laser ablation crater; the images did not show any structural damage. Conclusions: The findings suggest that our prototype could be used in future generations of endoscopic devices for minimally invasive laserosteotomy.
- Subjects :
- Paper
optical fiber
zirconium fluoride fiber
Optical fiber
Materials science
medicine.medical_treatment
Biomedical Engineering
2204 Biomedical Engineering
Lasers, Solid-State
3107 Atomic and Molecular Physics, and Optics
law.invention
minimally invasive laserosteotomy
Biomaterials
deep bone ablation
law
Fiber laser
Atomic and Molecular Physics
germanium oxide fiber
Aluminum Oxide
medicine
Electronic
Animals
Fiber
Optical and Magnetic Materials
sapphire fiber
General
Optical Fibers
Endoscopes
hollow-core silica waveguide
Sheep
Laser ablation
business.industry
Attenuation
2502 Biomaterials
laser ablation of bone
2504 Electronic, Optical and Magnetic Materials
Ablation
Laser
10226 Department of Molecular Mechanisms of Disease
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Optoelectronics
570 Life sciences
biology
Laser Therapy
and Optics
business
Er:YAG laser
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Journal of Biomedical Optics
- Accession number :
- edsair.doi.dedup.....1ad7e2c3afb40d582130ebad7140d989