Effects of argon laser on vascular materials

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Presentation transcript:

Effects of argon laser on vascular materials Yoichi Muto, M.D., John J. DuPree, M.S., Scott Duemler, M.D., Yeng Yang, M.D., Nubuhiro Koyanagi, M.D., William J. Cuffari, A.B., Teruo Matsumoto, M.D., Ph.D. Journal of Vascular Surgery Volume 7, Issue 4, Pages 562-567 (April 1988) DOI: 10.1016/0741-5214(88)90347-3 Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 1 A, Laser probe under saline solution. Bubbles around metal tip and laser beam radiation from opening of metal tip were noted. B, Test apparatus for laser application perpendicular to vascular materials. Journal of Vascular Surgery 1988 7, 562-567DOI: (10.1016/0741-5214(88)90347-3) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 2 Histologic findings of implanted grafts after laser application. A, Autogenous vein graft. B, PTFE graft. C, Dacron graft. These grafts received 30, 50, and 10 joules of laser energy, respectively. Vaporized portion with carbonization (open arrows) and compressed inner surface (closed arrows) were commonly seen (hematoxylin-eosin stain; original magnification × 60.) Journal of Vascular Surgery 1988 7, 562-567DOI: (10.1016/0741-5214(88)90347-3) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 3 Comparison of laser energy required to perforate each implanted graft. Laser energy required to perforate Dacron grafts was significantly lower than that needed to perforate PTFE grafts (p < 0.01). Journal of Vascular Surgery 1988 7, 562-567DOI: (10.1016/0741-5214(88)90347-3) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 4 Scanning electron microscopic findings of nonimplanted grafts after laser application. A, PTFE graft after receiving 100 joules of laser energy. Perforated site was noted. B, Dacron graft after receiving 200 joules of laser energy. It was not perforated but was compressed on its surface (original magnification × 40, black arrows show site contacting heated metal). Journal of Vascular Surgery 1988 7, 562-567DOI: (10.1016/0741-5214(88)90347-3) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 5 Scanning electron microscopic findings of suture materials after laser application. A, PTFE suture after receiving 200 joules of laser energy. It was not vaporized by laser beam but was stretched by compression of heated metal tip (black arrows). B, Polypropylene suture after receiving 10 joules. Deformation by melting was noted (original magnification × 160; black arrow shows site contacting heated metal). Journal of Vascular Surgery 1988 7, 562-567DOI: (10.1016/0741-5214(88)90347-3) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 6 Breaking weights of sutures before and after laser application. The breaking strength of PTFE sutures did not change after up to 200 joules of laser energy was applied compared with before laser application (p > 0.01). Breaking strength of polypropylene sutures after laser application was significantly less than that before laser application (p < 0.01). Journal of Vascular Surgery 1988 7, 562-567DOI: (10.1016/0741-5214(88)90347-3) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions