Abstract: A multi-wavelength laser system for thermal ablation in neurosurgery includes a magnetic resonance guidance unit, a laser ablation unit, and an optical fiber catheter unit. The laser ablation unit is configured to generate a surgical path and a surgical plan before a surgery, and regulate a plurality of laser modules and cooling modules in real time during the surgery to implement precision ablation of tissues, and the optical fiber catheter unit has a plurality of ablation channels and can implement ablation of a tumor of any scale. The multi-wavelength laser system allows for use of both a multi-wavelength treatment plan and a high-power single-wavelength single-channel treatment plan for precise conformal ablation on regular or irregular tumors, thereby greatly increasing the application range and use flexibility of the laser thermal therapy.

Abstract: A cooling sleeve includes an inner tube within which a bar-shaped or tubular object is placed to be cooled, and an outer tube within which the inner tube is located. The outer wall surface of the bar-shaped or tubular object contacts with the inner wall surface of the inner tube to form first contact portions, and axial gaps from the adjacent first contact portions form first circulation channels, and the inner wall surface of the outer tube contacts with the outer wall surface of the inner tube to form second contact portions, and axial gaps from the adjacent second contact portions form second circulation channels. Proximal ends of the first and second circulation channels are connected with each other inside the proximal end of the outer tube via a forming cavity, and distal ends of the first and second circulation channels are independently connected externally.