15 June 1989 Ball-Tip Fibres For Laser Angioplasty: Comparison Of Wavelengths From A Pulsed Neodymium-Yag Laser.
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Proceedings Volume 1067, Optical Fibers in Medicine IV; (1989); doi: 10.1117/12.952121
Event: OE/LASE '89, 1989, Los Angeles, CA, United States
A new ball-tip fibre optic device has been assessed for the purpose of laser angioplasty. A pulsed Neodymium-YAG laser producing 100 p.s pulses at a repetition rate of 10 Hz was used to ablate human cadaver arterial tissue using approximately 500 mJ per pulse at a wavelength of 1064 nm or 300 mJ at a wavelength of 1.3 μm. Both wavelengths are capable of ablating atheroma with little histological evidence of surrounding thermal damage. Crater depths of about 5 μm per Joule were produced using 1064 nm with normal tissue exposed under saline. Crater depth increases by about 50% when exposures are carried out under blood and when diseased arterial tissue is exposed the crater depth is almost doubled. Depth of ablation with a wavelength of 1.3 μm is 3 to 4 times greater than with 1064 nm for the same exposure and a similar increased response is seen for diseased tissue or in the presence of blood. Further experiments at 1064 nm have shown that the ball-tip device has advantages over bare fibre or sapphire tipped devices in the recanalisation of occluded femoral vessels in an artificial circulation.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jonathan A. Michaels, Frank W. Cross, Timothy J. Bowker, Stephen G. Bown, "Ball-Tip Fibres For Laser Angioplasty: Comparison Of Wavelengths From A Pulsed Neodymium-Yag Laser.", Proc. SPIE 1067, Optical Fibers in Medicine IV, (15 June 1989); doi: 10.1117/12.952121; https://doi.org/10.1117/12.952121

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