Ultrafast laser surgery probe for bone tissue microsurgery

Liam P. Andrus; Kaushik Subramanian; Michal E. Pawlowski; Ye Wang; Tomasz Tkaczyk; Adela Ben-Yakar

doi:10.1117/12.2578610

5 March 2021 Ultrafast laser surgery probe for bone tissue microsurgery

Liam P. Andrus, Kaushik Subramanian, Michal E. Pawlowski, Ye Wang, Tomasz Tkaczyk, Adela Ben-Yakar

Proceedings Volume 11641, Dynamics and Fluctuations in Biomedical Photonics XVIII; 116410D (2021) https://doi.org/10.1117/12.2578610
Event: SPIE BiOS, 2021, Online Only

Abstract

We present an ultrafast laser surgery probe for bone tissue microsurgery. A custom miniaturized CaF₂ mitigated the strong multiphoton absorption observed in our previous ZnS-based design while providing tighter beam focusing over a larger ablation field-of-view. The objective produced a beam waist radius of 1.71 μm covering a 130×130 μm²scan area, delivering fluences >8 J/cm² at the tissue surface at 53% transmission efficiency. The entire opto-mechanical system, enclosed within a 14 mm diameter metal housing with a 2.6 mm probe tip, exhibited material removal rates >0.1 mm³/min in bovine cortical bone. We performed simulations when using a high-power fiber laser and found that material removal rates >40 mm³/min could be achieved through selection of optimal laser surgery parameters. The device can serve as a clinically viable solution for minimally invasive spinal surgery applications.

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Citation Download Citation

Liam P. Andrus, Kaushik Subramanian, Michal E. Pawlowski, Ye Wang, Tomasz Tkaczyk, and Adela Ben-Yakar "Ultrafast laser surgery probe for bone tissue microsurgery", Proc. SPIE 11641, Dynamics and Fluctuations in Biomedical Photonics XVIII, 116410D (5 March 2021); https://doi.org/10.1117/12.2578610

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KEYWORDS

Laser therapeutics

Surgery

Bone

Laser tissue interaction

Laser ablation

Laser beam diagnostics

Microsurgery

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