Low-Intensity Laser Therapy and Led (Light Emitting Diode) Therapy in Mechanical Resistance of Rattus Norvegicus Chest Inscision With Implant of Steel Wire for Sternal Suture

Oliveira, Rauirys Alencar de; Matos, André Fernandes; Barros, Nara Regina Batista; Fernandes, Gilderlene Alves; Lima, Andréa Conceição Gomes; Nicolau, Renata Amadei

doi:10.4322/rbeb.2013.016

Cited by 9 publications

(6 citation statements)

References 19 publications

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“…However, even though numerous studies confirm the laser biomodular capacity, the parameters and the ideal protocols for its application haven´t been established yet 3,[11][12][13][14] . That reinforces the necessity of new studies with the objective to accomplish a better suitability of the parameters and protocols for each application.…”

Section: Discussionmentioning

confidence: 99%

The low-level laser on acute myositis in rats

Carvalho

Sousa²,

Feitosa

et al. 2015

Acta Cir. Bras.

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PURPOSE:To analyze the effects of the low-level laser therapy in the acute myositis induced in rats. METHODS:Fifteen male Wistar rats (Rattus norvegicus) were randomly distributed into three categories: control group (C), induced Myositis without treament (MI) and treated induced myositis (MT), for the experimental period of seven days. The induction of the acute myositis was done with 1% acetic acid by intramuscular route. The rats belonging to the experimental group had daily treatment through the GaAs (gallium arsenide) laser, with 904,0 nm length, and 45 mW peak power, with 3J/cm 2 , applied for 5 minutes on the animals' right posterior limb. RESULTS:In the MT group there was a statistic significant decrease in the number of inflammatory cells, related to the MI group (p<0.05), increase in the fibroblastic proliferation, when compared to groups C and MI related to MT group (p<0.01) and statistic significant edema regression (p=0.0400) in the MT group. CONCLUSION:The low-level laser therapy was efficient in the reduction of the inflammatory process, increase of the fibroblastic proliferation and the reduction of the edema.

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Section: Discussionmentioning

confidence: 99%

The low-level laser on acute myositis in rats

Carvalho

Sousa²,

Feitosa

et al. 2015

Acta Cir. Bras.

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“…This result does not corroborate studies that suggest that phototherapy acts on cell permeability and mitochondria, by stimulating the synthesis of ATP and favoring the onset of the deposition of thin collagen fibrils. 18,19,41 At 14 days, the qualitative histological analysis showed a predominance of thick fibers (type I) in the group LED + D, when compared with the other groups, which is characteristic of the process of fibrillogenesis. 4,40,42 Moreover, in this experimental period, the animals in the groups treated with phototherapy (LED and LED + D) had statistically significant morphometric results regarding the deposition of collagenous fibers, when compared with the control.…”

Section: Discussionmentioning

confidence: 99%

Comparative Study of Morphometric and Fourier Transform Infrared Spectroscopy Analyses of the Collagen Fibers in the Repair Process of Cutaneous Lesions

Cronemberger

Raniero

Bueno

et al. 2016

Advances in Wound Care

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Objective: Compare the efficacy of light-emitting diode (LED) and therapeutic ultrasound (TUS), combined with a semipermeable dressing (D), at forming collagen in skin lesions by morphometry and Fourier transform infrared spectroscopy (FT-IR). Materials and Methods: Surgical skin wounds (2.5 cm) were created on 84 male Wistar rats divided into four groups (n = 21): Group I (Control), Group II (LED), Group III (LED + D), and Group IV (US + D). On days 7, 14, and 21, the tissue samples were removed and divided into two pieces, one was used for histological examination (collagen) and the other for FT-IR. Results: The histomorphometric analysis showed no significant differences among groups for collagen deposition at 7 days. However, at 14 days, more deposition of collagen was noted in the groups LED ( p < 0.05) and LED + D ( p < 0.001) than in the control. At 21 days, the groups LED, LED + D, and US + D presented significantly greater deposition of collagen when compared with the control. The FT-IR spectra, at 14 days, LED + D had greater amounts of type I collagen, a better organization of fibers, and greater difference of mean separation between the groups, not observed at 7 and 21 days. Innovation: The histomorphometric and FT-IR analyses suggest that the association of semipermeable dressing to LED therapy and to TUS modulates biological events, increasing fibroblast/collagen response and accelerating dermal maturation. Conclusion: The histomorphometric and FT-IR analyses showed that LED therapy is more efficacious than TUS, when combined with a semipermeable dressing, and induced the collagen production in skin lesions.

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“…LLLT is a non-invasive, low-cost procedure that has been widely used in clinical practice to relieve pain and stimulate tissue regeneration (Buso, 2006;Dall-Agnol et al, 2009;Fikackova et al, 2006;Kato et al, 2006;Medeiros et al, 2010;Oliveira et al, 2013;Piva et al, 2011). Laser light interacts with biological tissues to produce significant beneficial therapeutic effects in various physiological systems (Leal et al, 2010;Piva et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…The effects of LLLT on biological tissues are very broad and induce trophic-regenerative, anti-inflammatory and analgesic actions, as well as Volume 32, Number 2, p. 153-160, 2016 enhanced local microcirculation, as demonstrated by studies in vitro and in vivo Oliveira et al, 2013). This beneficial effect on the microcirculation is related to an indirect action of the laser on precapillary sphincters through the release of chemical mediators that maintain a functional local peripheral microcirculation (Maier et al, 1990;Miró et al, 1984).…”

Section: Introductionmentioning

confidence: 99%

“…This beneficial effect on the microcirculation is related to an indirect action of the laser on precapillary sphincters through the release of chemical mediators that maintain a functional local peripheral microcirculation (Maier et al, 1990;Miró et al, 1984). In spite of various studies have examined the potentially beneficial effects of LLLT in animal models of pain, edema, local inflammation, hemorrhage and myonecrosis (Medeiros et al, 2010;Oliveira et al, 2013), to date there has been no assessment of the influence of LLLT on the contractility of venom-injected skeletal muscle. In this study, we examined the effect of LLLT on the function of mouse tibial muscle injected with B. jararaca venom.…”

Section: Introductionmentioning

confidence: 99%

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Low-intensity laser therapy improves tetanic contractions in mouse anterior tibialis muscle injected with Bothrops jararaca snake venom

Giaretta

Santos²,

Barbosa

et al. 2016

Res. Biomed. Eng.

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Introduction: Envenomation by Bothrops snakes can produce local pain, edema, hemorrhage and myonecrosis.However, standard antivenom therapy is generally ineffective in neutralizing these effects so that alternative methods of treatment have been investigated. In experimental animals, low-level laser therapy (LLLT) attenuates the local effects of Bothrops venoms, but the benefits of LLLT on muscle function after envenomation are unclear. In this study, we examined the influence of LLLT on the contractile activity of mouse skeletal muscle injected with venom from Bothrops jararaca, the principal cause of snakebite in southeastern Brazil. Methods: Twenty-seven male mice were used. Mice were injected with venom (40 μg in 50 μl) in the right anterior tibialis muscle, after which the muscle tendon was exposed, connected to an isometric transducer and subjected to a resting tension of 1 g. A bipolar electrode was attached to the tibial nerve for electrical stimulation. The mice were randomly allocated to five groups: A -Control (n = 3), B -Venom 3 h (n = 6), C -Venom 9 h (n = 6), D -Venom + Laser 3 h (n = 6), E -Venom + Laser 9 h (n = 6). Results: The two groups that received LLLT post-venom showed improved muscle contraction and contracture in relation to muscle treated with venom alone. Conclusion: These results indicate that LLLT can improve muscle function after damage induced by B. jararaca venom.

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Low-Intensity Laser Therapy and Led (Light Emitting Diode) Therapy in Mechanical Resistance of Rattus Norvegicus Chest Inscision With Implant of Steel Wire for Sternal Suture

Abstract: Introduction: Low-intensity laser (LILT)

Cited by 9 publications

References 19 publications

The low-level laser on acute myositis in rats

The low-level laser on acute myositis in rats

Comparative Study of Morphometric and Fourier Transform Infrared Spectroscopy Analyses of the Collagen Fibers in the Repair Process of Cutaneous Lesions

Low-intensity laser therapy improves tetanic contractions in mouse anterior tibialis muscle injected with Bothrops jararaca snake venom

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