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Related Experiment Video

Updated: Sep 24, 2025

Laser Nanosurgery of Cerebellar Axons In Vivo
09:25

Laser Nanosurgery of Cerebellar Axons In Vivo

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Fiber-laser platform for precision brain surgery.

Nitesh Katta1, Arnoldo D Estrada2, Austin B McErloy2

  • 1Beckman Laser Institute, University of California at Irvine, East Irvine, CA 92617, USA.

Biomedical Optics Express
|May 6, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a novel fiber-laser platform for precise, bloodless brain surgery in mice. The system uses specialized lasers for cutting and coagulation, minimizing thermal damage during neurological procedures.

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Area of Science:

  • Neurosurgery
  • Biomedical Optics
  • Laser Technology

Background:

  • Minimally invasive neurological surgeries require advanced tools for precise tissue manipulation.
  • Current limitations exist in specialized tools for controlled energy delivery in neurological procedures.
  • Fiber-lasers offer potential advantages in power, beam quality, and delivery for surgical applications.

Purpose of the Study:

  • To demonstrate the efficacy of a fiber-laser platform for precise, bloodless brain surgery in a murine model.
  • To evaluate the ability of fiber-lasers to achieve precise tissue resection with limited thermal damage.
  • To explore the use of biocompatible silica fibers for energy delivery in neurosurgery.

Main Methods:

  • Development of a bench-top optical coherence tomography (OCT) guided fiber-laser platform with a stereotactic stage.
  • Utilized a pulsed ytterbium (Yb) fiber-laser (1.07 µm) for vascular coagulation and a pulsed thulium (Tm) fiber-laser (1.94 µm) for bloodless cutting.
  • Combined lasers into a single silica fiber for in vivo resection under OCT guidance in a murine brain model.

Main Results:

  • Demonstrated vascular-specific coagulation and bloodless linear/point cuts in vivo in murine brains.
  • Achieved minimal thermal injury (<100 µm) and a tissue removal rate of approximately 5 mm³/s with Tm fiber-laser.
  • Successfully performed precise brain tissue resection using the combined fiber-laser system.

Conclusions:

  • This work represents the first demonstration of a fiber-laser platform for in vivo bloodless brain resection using pulsed Tm and QCW Yb fiber-lasers.
  • The developed platform shows promise for enhancing precision and efficiency in neurosurgical resections.
  • Potential for future development into a flexible surgical tool for accessing difficult-to-reach brain regions.