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Argon laser vascular fusion: venous and arterial bursting pressures.

Abstract：

:This study was designed to determine the optimal laser power (watts) for maximal strength of argon laser vascular fusions by measuring bursting pressures of repairs. Longitudinal incisions (n = 105) measuring either 2.5 or 5 mm in length were performed in canine femoral, carotid, and jugular veins and arteries and were fused with the argon laser at 0.3, 0.5, 0.7, or 0.9 W power. Total exposure time for each repair (50 to 80 sec/0.5 cm) was adjusted to yield identical energy fluences of 1,100 J/cm2. Bursting pressure of the fusions was determined by monitored infusion of anticoagulated blood into an isolated segment of the vessel that contained the fusion. Mean bursting pressures for venous and arterial repairs were significantly higher in the 2.5 mm incisions compared with the 5 mm incisions (P less than 0.05). Venous and arterial repairs of equal length performed at each power resulted in equivalent bursting strengths, except that 5 mm venous segments fused with 0.9 W withstood lower pressures than all other venous repairs (P less than 0.05), and 5 mm arterial segments were in turn significantly weaker at 0.3 W (P less than 0.02). We conclude that argon laser fusion is equally suitable for repair of medium-sized veins and arteries and that immediate strength decreases with increasing length of repair. To maximize strength of longer repairs, venotomies should be welded at power settings between 0.3 and 0.7 W while arteriotomies should be fused at power settings between 0.5 and 0.9 W. The differences in optimal power may be explained by variable wall composition and thickness between veins and arteries.

journal_name

Lasers Surg Med

journal_title

Lasers in surgery and medicine

authors

Vlasak JW,Kopchok GE,Fujitani RM,White RA

doi

10.1002/lsm.1900090509

subject

Has Abstract

pub_date

1989-01-01 00:00:00

pages

478-81

issue

5

eissn

0196-8092

issn

1096-9101

journal_volume

9

pub_type

杂志文章

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