Thermal Damage of the Inner Vein Wall During Endovenous Laser Treatment: Key Role of Energy Absorption by Intravascular Blood

• DOI: 10.1046/j.1524-4725.2002.01309.x
• Publication Date: 2003-03-11T15:21:19Z
• Authors: T. M. Proebstle; M. Sandhofer; A. Kargl; D. Gül; W. Rother; J. Knop; H. A. Lehr
• Keywords: Varicose Veins; Steam; 03 medical and health sciences; 0302 clinical medicine; Humans; Saphenous Vein; Laser Therapy; In Vitro Techniques

BACKGROUND Despite the clinical efficacy of endovenous laser treatment (EVLT), its mode action is incompletely understood. OBJECTIVE To evaluate role intravascular blood for effective transfer thermal damage to vein wall through absorption energy. METHODS Laser energy (15 J/pulse, 940 nm) was endovenously administered explanted greater saphenous (GSV) segments filled with (n = 5) or normal saline in addition GSVs under vivo conditions immediately prior stripping. Histopathology performed on serial sections examine specific patterns damage. Furthermore, vitro generation steam bubbles by different diode lasers (810, 940, and 980 examined saline, plasma, hemolytic blood. RESULTS In saline-filled veins, EVLT-induced vessel injury confined site direct impact. contrast, blood-filled veins exhibited more remote areas including opposite Steam were generated all three lasers, while no could be produced plasma. CONCLUSION Intravascular plays a key homogeneously distributed inner during EVLT.