Concept of a novel laser probe for minimal invasive applications in neurosurgery

The design is described of a novel stereotactic probe for minimal invasive, laser-based treatment of deep seated brain lesions. The probe is coupled to a Nd:YLF laser system which generates laser pulses with a pulse width of only a few picoseconds. These pulses initiate a plasma-induced tissue ablation process that offers significant advantages in neurosurgical applications because it causes no unwanted thermal or mechanical side effects. Furthermore, the probe is connected to an irrigation and pressure control system which is needed to support the laser-based tissue destruction. All major components of the probe as well as its operation as a stereotactic device are illustrated. A nearly finalized prototype has a diameter of 5.5 mm and may be inserted into the skull up to a depth of 12 cm.