1 July 1998 Accumulative small-droplet laser soldering
Author Affiliations +
Proceedings Volume 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII; (1998) https://doi.org/10.1117/12.312297
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States
Abstract
We conducted in vitro laser fusion experiments of bovine aorta using successive accumulation of solder droplets. The solder was composed of serum albumin, sodium hyaluronate and Indocyanine Green dye. After depositing 0.2 (mu) L of the solder onto an aorta incision with a micro-pipette, we used a diode laser at 808 nm with fixed energy parameters to coagulate the solder droplet. A solder strip was formed from 10 droplets photocoagulated to increase the solder-tissue contact area and coagulum volume. Repair of aorta incision was achieved with both a single solder strip and double solder strips. For half of the welded specimens, tensile measurement was performed immediately following solder experiments. Tensile strength was measured in the rest of the specimens after soaking in saline for 24 hours. Scanning electron microscopy was performed on selected specimens. The average ultimate tensile strengths for the single strip group were 261 N/cm2 for acute, and 81 N/cm2 after 1 day of saline immersion. The average ultimate tensile strengths for the double strip group were 253 N/cm2 for acute, and 77 N/cm2 after soaking is saline for 1 day. We also measured native aorta ultimate tensile strength, which was 76 N/cm2. This study demonstrated the feasibility of using micro droplets of solder to increase tensile strength.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eric K. Chan, Ashley J. Welch, Elaine L. Shay, Thomas Springer, Christopher J. Frederickson, Massoud Motamedi, "Accumulative small-droplet laser soldering", Proc. SPIE 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII, (1 July 1998); doi: 10.1117/12.312297; https://doi.org/10.1117/12.312297
PROCEEDINGS
8 PAGES


SHARE
Back to Top