Diode Laser Vascular Welding of Swine Aorta Under Scattering Light Monitoring

S. Ohmori, Tsunenori Arai, M. Fujita, N. Usami, M. Kikuchi, T. Maehara

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Purpose: To develop the catheter-based laser vascular welding device against aortic dissection, we studied fundamental characteristics of the laser vascular welding for aorta dissection model in vitro with the scattering light monitoring to obtain welding proceedings. Methods: We employed the laser vascular welding by means of the combination of the diode laser irradiation and indocyanine green (ICG) stain to the dissected vessel surface in a swine aortic dissection model to obtain localized heat generation on the surface. The forward and backward scattering lights of the diode laser from the welding portion were measured during the laser irradiation. The breaking stresses of the welded aortic pieces were measured. Results: The breaking stress of 170gf/cm2 obtained with the 425W/cm2, 2.4s irradiation may be strong enough to the successful therapy for aortic dissection regarding to the dissecting force caused by blood flow. By analyzing forward and backward scattering lights, we could observe the occurrence of water evaporation in the welding portion, the bleaching of the ICG and the carbonization of the welding portion. Then we could monitor the proceedings of the welding process. The temperature estimation of the welding portion and the microscopic observation revealed that the mechanism of our welding may be basically elastic fiber entwining. Conclusions: We think our vascular welding with the scattering light monitoring of the welding process has the potential to apply catheter-based therapy for aortic dissection.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsL.S. Bass, N Kollias, R.S. Malek, A Katzir, U.K. Shah, B.J.F. Wong, E.A. Trowers, T.A. Woodward, W.T.W. de Riese, D.S. Robinson, H-D Reidenbach, K.D. Paulsen, K.W. Gregory
Pages194-198
Number of pages5
Volume4949
DOIs
Publication statusPublished - 2003
EventLasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIII - San Jose,CA, United States
Duration: 2003 Jan 252003 Jan 26

Other

OtherLasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIII
CountryUnited States
CitySan Jose,CA
Period03/1/2503/1/26

Fingerprint

aorta
swine
welding
Light scattering
Semiconductor lasers
Welding
light scattering
semiconductor lasers
Monitoring
Dissection
dissection
Catheters
forward scattering
Laser beam effects
irradiation
lasers
Lasers
congressional reports
therapy
carbonization

Keywords

  • Aortic dissection
  • Diode Laser
  • Elastic fiber
  • Indocyanine green
  • Laser vascular welding
  • Scattering light

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ohmori, S., Arai, T., Fujita, M., Usami, N., Kikuchi, M., & Maehara, T. (2003). Diode Laser Vascular Welding of Swine Aorta Under Scattering Light Monitoring. In L. S. Bass, N. Kollias, R. S. Malek, A. Katzir, U. K. Shah, B. J. F. Wong, E. A. Trowers, T. A. Woodward, W. T. W. de Riese, D. S. Robinson, H-D. Reidenbach, K. D. Paulsen, ... K. W. Gregory (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4949, pp. 194-198) https://doi.org/10.1117/12.476396

Diode Laser Vascular Welding of Swine Aorta Under Scattering Light Monitoring. / Ohmori, S.; Arai, Tsunenori; Fujita, M.; Usami, N.; Kikuchi, M.; Maehara, T.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / L.S. Bass; N Kollias; R.S. Malek; A Katzir; U.K. Shah; B.J.F. Wong; E.A. Trowers; T.A. Woodward; W.T.W. de Riese; D.S. Robinson; H-D Reidenbach; K.D. Paulsen; K.W. Gregory. Vol. 4949 2003. p. 194-198.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ohmori, S, Arai, T, Fujita, M, Usami, N, Kikuchi, M & Maehara, T 2003, Diode Laser Vascular Welding of Swine Aorta Under Scattering Light Monitoring. in LS Bass, N Kollias, RS Malek, A Katzir, UK Shah, BJF Wong, EA Trowers, TA Woodward, WTW de Riese, DS Robinson, H-D Reidenbach, KD Paulsen & KW Gregory (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4949, pp. 194-198, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems XIII, San Jose,CA, United States, 03/1/25. https://doi.org/10.1117/12.476396
Ohmori S, Arai T, Fujita M, Usami N, Kikuchi M, Maehara T. Diode Laser Vascular Welding of Swine Aorta Under Scattering Light Monitoring. In Bass LS, Kollias N, Malek RS, Katzir A, Shah UK, Wong BJF, Trowers EA, Woodward TA, de Riese WTW, Robinson DS, Reidenbach H-D, Paulsen KD, Gregory KW, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4949. 2003. p. 194-198 https://doi.org/10.1117/12.476396
Ohmori, S. ; Arai, Tsunenori ; Fujita, M. ; Usami, N. ; Kikuchi, M. ; Maehara, T. / Diode Laser Vascular Welding of Swine Aorta Under Scattering Light Monitoring. Proceedings of SPIE - The International Society for Optical Engineering. editor / L.S. Bass ; N Kollias ; R.S. Malek ; A Katzir ; U.K. Shah ; B.J.F. Wong ; E.A. Trowers ; T.A. Woodward ; W.T.W. de Riese ; D.S. Robinson ; H-D Reidenbach ; K.D. Paulsen ; K.W. Gregory. Vol. 4949 2003. pp. 194-198
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abstract = "Purpose: To develop the catheter-based laser vascular welding device against aortic dissection, we studied fundamental characteristics of the laser vascular welding for aorta dissection model in vitro with the scattering light monitoring to obtain welding proceedings. Methods: We employed the laser vascular welding by means of the combination of the diode laser irradiation and indocyanine green (ICG) stain to the dissected vessel surface in a swine aortic dissection model to obtain localized heat generation on the surface. The forward and backward scattering lights of the diode laser from the welding portion were measured during the laser irradiation. The breaking stresses of the welded aortic pieces were measured. Results: The breaking stress of 170gf/cm2 obtained with the 425W/cm2, 2.4s irradiation may be strong enough to the successful therapy for aortic dissection regarding to the dissecting force caused by blood flow. By analyzing forward and backward scattering lights, we could observe the occurrence of water evaporation in the welding portion, the bleaching of the ICG and the carbonization of the welding portion. Then we could monitor the proceedings of the welding process. The temperature estimation of the welding portion and the microscopic observation revealed that the mechanism of our welding may be basically elastic fiber entwining. Conclusions: We think our vascular welding with the scattering light monitoring of the welding process has the potential to apply catheter-based therapy for aortic dissection.",
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