Helium-neon laser in viability of random skin flap in rats

Abstract

The He-Ne laser irradiation was efficient to increase random skin flap viability in rats.

Laser 830nm na viabilidade do retalho cutâneo de ratos submetidos à nicotina

“…Based on the ability of laser radiation to promote angiogenesis and an increase in local blood flow, some researchers have started to investigate the action of this therapeutic agent in the viability of skin flaps. 12,17 In this study, the application of laser radiation occurred at a point located 2.5cm from the base of the flap, with a basis on the experimental model for low intensity laser in ischemic random skin flaps in rats, proposed by Prado et al 7 The experimental groups of this study underwent radiation for five consecutive days, that is, immediately after the operation and on the following 4 days. Pinfildi et al 12 also made use of this methodology in submitting their experimental groups to radiation for five consecutive days.…”

“…A plastic (polyester/polyethylene) barrier with the same dimensions (10x4) was placed between the flap and the donor site ( Figure 1), preventing revascularization of the flap by means of the donor site vessels. 11,12 After this, the flap was sutured with single stitches using 4-0 monofilament nylon thread in the same original position ("donor area"), separated with the distance of 1cm between stitches.…”

The effects of different doses of 670 nm diode laser on skin flap survival in rats

“…The studies found in the literature dealing with this topic used lasers operating at wavelengths of 632.8 5,7,9 , 660 19 and 830 nm 3,4,6,8 , and emitting continuous light (Table 3). In the present study, the increase in survival observed in irradiated skin flaps agrees with previous studies [19][20][21][22] , except for Smith, 9 who did not find any significant effect in the use of laser therapy.…”

“…Furthermore, the use of "energy delivered to the tissue" instead of "energy density" as a parameter for analysis may be necessary since many studies [3][4][5][6][7][8] show apparent contradictions in the results when the parameter energy density is evaluated. The World Association for Laser Therapy (WALT) 29 recommends on their website the use of energy dose delivered to the tissue as a dosimetric parameter in the treatment of pain.…”

“…Laser treatment has been reported to give good results when applied to skin flaps [3][4][5][6][7][8] , except for Smith 9 , who did not find any significant effect in the use of this therapy.…”