Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Simultaneous multiwavelength laser surgery

[+] Author Affiliations
Myron L. Wolbarsht

Duke Univ. (USA)

Proc. SPIE 2097, Laser Applications, 89 (August 10, 1994); doi:10.1117/12.183131
Text Size: A A A
From Conference Volume 2097

  • Laser Applications
  • Artur A. Mak
  • St. Petersburg, Russia | June 21, 1993


The coagulative effect of the conventional CO2 surgical laser at 10.6 micrometers is usually sufficient for homeostasis during surgery, but at laser wavelengths approaching 3 micrometers , the absorption depth is very shallow, and all the laser/tissue interaction is very close to the surface. Where ablation of surface tissues must be combined with a more penetrating laser action for coagulation or tissue bonding, auxiliary wavelengths are required. Significant penetration into the remaining unablated tissue is needed for coagulation of large blood vessels, as well as for generalized control of bleeding or seeping, or for more gentle, but even, heating of the cut surfaces of blood vessels, nerves, and other tissues as part of tissue anastomosis or bonding procedures. Also, large volumes of tissue are often removed as rapidly as possible; this needs deep penetration of the energy over a wide area. All of these effects call for wavelengths well away from the water absorption peak near 3 micrometers . Both ZrF4 and sapphire optical fibers are sufficiently transparent in the visible and IR regions of the spectrum to pass an ablative wavelength near 3 micrometers , coagulative and tissue bonding wavelengths in the shorter IR, and another auxiliary beam in the visible to serve as a marker which will remain in precise optical alignment with the active and invisible IR beams. The control of the relative proportions of the various active wavelengths will allow selection of the precise surgical effect to be obtained, ranging from pure ablation to coagulation only or tissue bonding alone with all combinations in between. The concept of the multiwavelength laser delivery system will certainly be popular in the future whenever such instrumentation becomes sufficiently available for its utility to be widely recognized.

© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Myron L. Wolbarsht
"Simultaneous multiwavelength laser surgery", Proc. SPIE 2097, Laser Applications, 89 (August 10, 1994); doi:10.1117/12.183131; http://dx.doi.org/10.1117/12.183131

Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).



Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections



  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.