Laser Soldering of Rat Skin Using a Controlled Feedback System

Document Type: Original Paper

Authors

1 PhD Student in Biomaterials, Amirkabir University of Technology, Tehran, Iran.

2 Associated Professor, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran.

3 M.Sc in Bioelectric Engineering, Islamic Azad University, Tehran, Iran.

4 Assistant Professor, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran

5 M.Sc in Biomechanics Engineering, Amirkabir University of Technology, Tehran, Iran.

6 Assistant Professor, Biomedical Engineering Dept., Amirkabir University of Technology, Tehran, Iran.

7 Assistant Professor, Pathology Dept., Iran University of Medical Sciences, Tehran, Iran

Abstract

Introduction: Laser tissue soldering using albumin and indocyanine green dye (ICG) is an effective technique utilized in various surgical procedures. The purpose of this study was to perform laser soldering of rat skin under a feedback control system and compare the results with those obtained using standard sutures.
Material and Methods: Skin incisions were made over eight rats’ dorsa, which were subsequently closed using different wound closure interventions in two groups: (a) using a temperature controlled infrared detector or (b) by suture. Tensile strengths were measured at 2, 5, 7 and 10 days post-incision. Histological examination was performed at the time of sacrifice.
Results: Tensile strength results showed that during the initial days following the incisions, the tensile strengths of the sutured samples were greater than the laser samples. However, 10 days after the incisions, the tensile strengths of the laser soldered incisions were higher than the sutured cuts. Histopathological examination showed a preferred wound healing response in the soldered skin compared with the control samples. The healing indices of the laser soldered repairs (426) were significantly better than the control samples (340.5).
Conclusion: Tissue feedback control of temperature and optical changes in laser soldering of skin leads to a higher tensile strength and better histological results and hence this method may be considered as an alternative to standard suturing.

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Volume 6, Issue 1
March and April 2009
Pages 61-69
  • Receive Date: 04 November 2008
  • Revise Date: 11 December 2008
  • Accept Date: 24 February 2009