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Proceedings Paper

Accumulative small-droplet laser soldering
Author(s): Eric K. Chan; Ashley J. Welch; Elaine L. Shay; Thomas Springer; Christopher J. Frederickson; Massoud Motamedi
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Paper 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.

Paper Details

Date Published: 1 July 1998
PDF: 8 pages
Proc. SPIE 3245, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII, (1 July 1998); doi: 10.1117/12.312297
Show Author Affiliations
Eric K. Chan, Indigo Medical, Inc. (United States)
Ashley J. Welch, Univ. of Texas/Austin (United States)
Elaine L. Shay, Univ. of Texas/Austin (United States)
Thomas Springer, Symtx (United States)
Christopher J. Frederickson, MicroFab Technologies, Inc. (United States)
Massoud Motamedi, Univ. of Texas Medical Branch at Galveston (United States)


Published in SPIE Proceedings Vol. 3245:
Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VIII
Graham M. Watson M.D.; Harvey Lui M.D.; Lou Reinisch; Penny J. Smalley R.N.; Kenneth Eugene Bartels D.V.M.; R. Rox Anderson M.D.; Lawrence S. Bass M.D.; Kenneth Eugene Bartels D.V.M.; C. Gaelyn Garrett M.D.; Lloyd P. Tate V.D.M.; Sharon L. Thomsen M.D.; Reza S. Malek M.D.; Aaron P. Perlmutter M.D.; R. Rox Anderson M.D.; Lawrence S. Bass M.D.; C. Gaelyn Garrett M.D.; Kenton W. Gregory M.D.; Harvey Lui M.D.; Reza S. Malek M.D.; Aaron P. Perlmutter M.D.; Lou Reinisch; Penny J. Smalley R.N.; Lloyd P. Tate V.D.M.; Sharon L. Thomsen M.D.; Graham M. Watson M.D., Editor(s)

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