Quartz versus sapphire optical chambers for use in infrared laser sealing of blood vessels

Woheeb M. Saeed; Patrick J. O'Brien; Jude K. Yoshino; Aidan R. Restelli; Alexandria J. Traynham; Nathaniel M. Fried

doi:10.1117/12.3000375

12 March 2024 Quartz versus sapphire optical chambers for use in infrared laser sealing of blood vessels

Woheeb M. Saeed, Patrick J. O'Brien, Jude K. Yoshino, Aidan R. Restelli, Alexandria J. Traynham, Nathaniel M. Fried

Author Affiliations +

Proceedings Volume 12817, Advanced Photonics in Urology 2024; 1281703 (2024) https://doi.org/10.1117/12.3000375
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Infrared (IR) lasers are being tested as an alternative to radiofrequency (RF) and ultrasonic (US) devices for hemostatic sealing of vascular tissues. In recent studies, a side-firing optical fiber was reciprocated, producing a linear laser beam pattern for sealing blood vessels. Challenges include limited field-of-view of vessel position within the device jaws, and matching fiber scan length to vessel size. A transparent jaw may improve visibility and enable custom treatment. Quartz and sapphire square optical chambers (2.7 x 2.7 x 25mm OD) were tested with a 1470nm laser and 550-μm-core fiber. Peak temperatures and cooling times were recorded on chamber surfaces. Angle polished fiber tips delivered 94% of light at a 90° angle. Porcine renal arteries with diameters of 3.4±0.7mm (n=13) for quartz and 3.2±0.7mm (n=14) for sapphire (P>0.05), were sealed using 30W for 5s. Reflection losses were 3.3% and 7.4% for quartz and sapphire. Peak temperatures on external chamber surface averaged 74±8 °C and 73±10 °C (P>0.05). Times to cool down to 37 °C measured 13±4s and 27±7s (P<0.05). Vessel burst pressures (BP) averaged 883±393mmHg and 412±330mmHg (P<0.05). For quartz, 13/13 (100%) vessels were sealed (BP>360mmHg), versus 9/14 (64%) for sapphire. Quartz provided more consistent seals and shorter cooling times than sapphire.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Woheeb M. Saeed, Patrick J. O'Brien, Jude K. Yoshino, Aidan R. Restelli, Alexandria J. Traynham, and Nathaniel M. Fried "Quartz versus sapphire optical chambers for use in infrared laser sealing of blood vessels", Proc. SPIE 12817, Advanced Photonics in Urology 2024, 1281703 (12 March 2024); https://doi.org/10.1117/12.3000375

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