LITT on canine prostates: an in-vivo study to compare the effects of different wavelengths

Ronald Sroka; Aaron P. Perlmutter M.D.; Thomas Martin; Rolf Muschter M.D.

doi:10.1117/12.240027

17 May 1996 LITT on canine prostates: an in-vivo study to compare the effects of different wavelengths

Ronald Sroka, Aaron P. Perlmutter M.D., Thomas Martin, Rolf Muschter M.D.

Proceedings Volume 2671, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VI; (1996) https://doi.org/10.1117/12.240027
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

Laser induced interstitial thermotherapy is a new minimally invasive procedure for the treatment of benign prostatic hyperplasia. Since high power laser diode lasers became available for clinical use a comparison of tissue effects of different wavelengths under controlled conditions is needed. In this study three different laser wavelengths were compared at output powers of 4 W and 8 W with 10 min and 90 s irradiation time, respectively, resulting in applied energies of 2700 J and 720 J. The results in both groups showed that the use of a wavelength close to the relative water absorption peak at 980 nm gave tendentiously but not significantly larger coagulated areas. Furthermore it became obvious that the use of 8 W for 90 sec results in higher maximum temperatures and larger lesions compared to the application of 4 W over a period of 10 min, although the energy used in the latter group was 4 fold higher.

Citation Download Citation

Ronald Sroka, Aaron P. Perlmutter M.D., Thomas Martin, and Rolf Muschter M.D. "LITT on canine prostates: an in-vivo study to compare the effects of different wavelengths", Proc. SPIE 2671, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VI, (17 May 1996); https://doi.org/10.1117/12.240027

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