Two-layer film as a laser soldering biomaterial

✍ Scribed by Lauto, A.; Kerman, I.; Ohebshalon, Michael; Felsen, Diane; Poppas, D.P.

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 325 KB
• Volume: 25
• Category: Article
• ISSN: 0196-8092
• DOI: 10.1002/(sici)1096-9101(1999)25:3<250::aid-lsm9>3.0.co;2-v

✦ Synopsis

Background and Objectives:

A two-layer solder was developed to weld at low laser intensity and to provide a new method of measuring solder-tissue temperature. Study Design/Materials and Methods: A film solder consisted of a white layer (bovine serum albumin (BSA) and distilled water) and a black layer (BSA, carbon black (CB), and distilled water). This two-layer solder was used with a diode laser to weld sections of dog small intestine ( = 810 nm, power = 200 ± 20 mW, radiation dose = 18 ± 1 J/mg). Sections of intestine were welded only with one-layer black solders as control group. The temperature difference between the external solder surface and the tissue-solder interface was evaluated during welding. Results: The two-layer solder performed welds as strong as the one-layer solder (∼0.12 N) but with less laser intensity on the black layer. The temperature difference between the external surface of the solder and the solder-tissue interface was significantly less for the two-layer solder than for the one-layer solder (∼6°C and ∼15°C, respectively; P < 0.05).

Conclusions:

The two-layer solder appeared to be more efficient at soldering biomaterials than the one-layer solder. Furthermore, the heat diffusion from the black midplane of the twolayer solder decreased the difference in temperature recorded on the solder external surface and on the solder-tissue interface. Lasers Surg. Med. 25:250-256, 1999.