MoXy fiber with active cooling cap for bovine prostate vaporization with high power 200W 532 nm laser

Steven Yihlih Peng; Hyun Wook Kang; Homa Pirzadeh; Douglas Stinson

doi:10.1117/12.875195

17 February 2011 MoXy fiber with active cooling cap for bovine prostate vaporization with high power 200W 532 nm laser

Steven Yihlih Peng, Hyun Wook Kang, Homa Pirzadeh, Douglas Stinson

Proceedings Volume 7883, Photonic Therapeutics and Diagnostics VII; 78831D (2011) https://doi.org/10.1117/12.875195
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

A novel MoXy^TM fiber delivery device with Active Cooling Cap (ACC^TM) is designed to transmit up to 180W of 532 nm laser light to treat benign prostatic hyperplasia (BPH). Under such high power tissue ablation, effective cooling is key to maintaining fiber power transmission and ensuring the reliability of the fiber delivery device To handle high power and reduce fiber degradation, the MoXy fiber features a larger core size (750 micrometer) and an internal fluid channel to ensure better cooling of the fiber tip to prevent the cap from burning, detaching, or shattering during the BPH treatment. The internal cooling channel was created with a metal cap and tubing that surrounds the optical fiber. In this study MoXy fibers were used to investigate the effect of power levels of 120 and 200 W on in-vitro bovine prostate ablation using a 532 nm XPS^TM laser system. For procedures requiring more than 100 kJ, the MoXy fiber at 200W removed tissue at twice the rate of the current HPS fiber at 120W. The fiber maintained a constant tissue vaporization rate during the entire tissue ablation process. The coagulation at 200W was about 20% thicker than at 120W. In conclusion, the new fibers at 200W doubled the tissue removal rate, maintained vaporization efficiency throughout delivery of 400kJ energy, and induced similar coagulation to the existing HPS fiber at 120W.

Citation Download Citation

Steven Yihlih Peng, Hyun Wook Kang, Homa Pirzadeh, and Douglas Stinson "MoXy fiber with active cooling cap for bovine prostate vaporization with high power 200W 532 nm laser", Proc. SPIE 7883, Photonic Therapeutics and Diagnostics VII, 78831D (17 February 2011); https://doi.org/10.1117/12.875195

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available