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Clinical Application

Comparison of the bio-heating effectiveness to nucleus pulposus between 1064nm Nd YAG laserand 980nm diode laser

Keywords: PLDD, bio-heating effectiveness, safety, laser, disc

Percutaneous laser disc decompression(PLDD) was firstly introduced by Choy in 1987,Choy and Ascher reported the experiment outcome and the clinical application in 1987. Since then,PLDD has been generalized all over the world, lots of basic study and clinical cases have been reported one after
another. PLDD is the product of laser technique and medical science,it’s a effective,micro-invasive skill to cervical spondylosis and lumbar spondylosis.The rudiment of PLDD is to vaporize the nucleus pulposus using the laser which is inserted into disc under X-ray or CT, then decrease the pressure of disc to make the herniated disc recovery,decrease the pressure on nerve root to improve the symptom.There always has a focus about which kind of laser to use in PLDD and how about the safety. At present,the 1064nm Nd:YAG laser and the 980nm diode laser are used widely in PLDD,they both have the close wavelength,but the comparison of bio-heating effectiveness to nucleus pulposus between them have seldom been seen. The fresh goat intervertebral lumbar discs were radiated by Nd:YAG laser and 980nm diode laser in this study,
the ablated quality of nucleus pulposus and the morphous of the cavity after radiating and the changes of temperature around discs during radiating were observed to compare the ablation ability to nucleus pulposus and the safety between two lasers.

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