Recanalization of arterial occlusions with a lensed fiber and a holmium:YAG laser

✍ Scribed by Dr. Christopher J. White; Stephen R. Ramee; Tyrone J. Collins; Juan E. Mesa; Daniel B. Paulsen; Joseph P. Murgo

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 624 KB
• Volume: 11
• Category: Article
• ISSN: 0196-8092
• DOI: 10.1002/lsm.1900110308

✦ Synopsis

Laser recanalization of totally occluded swine iliac arteries was performed to assess the safety and efficacy of a lensed fiber laser angioplasty system with a ho1mium:YAG (2.1 pm) laser. Silica lenses of 1.0 mm, 1.3 mm, and 1.5 mm in diameter attached to the distal end of a 300-pm diameter silica fiber delivered fluences of 79.5 J/cm2, 31.4 J/cm2, and 25.5 J/cm2, respectively. The pulse duration of the laser was 250 psec and the repetition rate was 4 Hz. The mean length of the total occlusions was 5.3 2 2.0 cm (range 0.5 cm to 8.0 cm). Successful recanalization was obtained in 16/16 lesions without angiographic vessel perforation. Angiographically significant residual stenoses 050%) remained in every case following successful laser recanalization. Histologically there was minimal evidence of thermal or acoustic tissue injury; however, in 4 of 16 arteries there was evidence of deep arterial dissection following laser recanalization. We conclude that this lensed fiber coupled with a ho1mium:YAG laser is a safe and effective method for crossing total occlusions in the relatively straight iliac arteries of this animal model.