The aim of percutaneous laser disk decompression(PLDD) is to vaporize a small portion of the nucleus pulpous of an intervertebral disk, thereby reducing the volume and pressure of a diseased disk. Pressure reduction creates a pressure gradient leading to migration of the herniated portion away from the involved nerve root. This is based on a physical principal of Pascal Law. In an enclosed hydraulic space, small change in volume will result in a large change in pressure. 

The Advantages of the Laser Discectomy over conventional surgery include; 

Performed as an out patient procedure 
Do not preclude alternative surgical options 
Reduced risk of complications 
Usually provide immediate relief of symptoms 
Reduced soft tissue injury 
No bone is sacrificed 
No epidural fibrosis 

Technical Specifications 
Laser typeGaAlAs diode laser 
ModelVELAS30B 
Wavelength980nm 
Maximum power30W 
Operation modeCW, pulsed 
Pulse duration50ms-2s 
Repetition rate0.5Hz-10kHz 
Transmission systemFibers of 400μ M, 600μ M with SMA905 connector 
Pilot BeamRed Diode laser of 635nm, power<5mW 
Control modeTrue color Touch screen 
Voltage/Current Rating110/220 VAC, 2A, 50/60 Hz 
Dimensions400(W)*385(L)*200(H) mm 
Weight9.5Kg