Low-level laser therapy with a pulsed infrared laser accelerates second-degree burn healing in rat

A clinical and microbiologic study

Ali Ezzati, Mohammad Bayat, Amir Khoshvaghti

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Objective: This study was carried out to investigate the influence of pulsed-wave low-level laser therapy (LLLT) on the healing of a deep second-degree burn model in rat. Background data: Review of literature indicates that LLLT has a biostimulatory effect on wound healing; however, no clear recommendation can yet be made. Methods: Two deep second-degree burns were made in the skin of 67 rats. Rats were divided into four groups. In the first group (control), the proximal burn were received LLLT with shot down laser; in the second and third groups, proximal burns were treated with a 3,000-Hz pulsed infrared diode laser with 2.3 and 11.7 J/cm2 energy densities, respectively. In the fourth group, the proximal burns were treated topically with 0.2% nitrofurazone. The distal burn of all groups was considered the control burn. The response to treatment was assessed both microbiologically and macroscopically. Results: The incidence of Staphylococcus aureus decreased significantly in group 3 in comparison with group 1 on day 28 (χ2 test, p = 0.05). Analysis of variance showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 2 weeks (0.915 ± 0.310) and 3 weeks (0.677 ± 0.397) after burning compared with placebo burns (1.413 ± 0.319; 1.116 ± 0.436, respectively) ANOVA-LSD test, p = 0.045 and p = 0.046 respectively. Independent sample t tests showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 4 weeks after burning (0.211 ± 0.146) compared with the control burns (0.707 ± 0.480) p = 0.039. Conclusions: Pulsed LLLT with 11.7 J/cm2/890 nm of a deep second-degree burn model in rat significantly increased the rate of wound closure compared with control burns.

Original languageEnglish (US)
Pages (from-to)603-611
Number of pages9
JournalPhotomedicine and Laser Surgery
Volume28
Issue number5
DOIs
StatePublished - Oct 1 2010
Externally publishedYes

Fingerprint

Infrared lasers
Pulsed lasers
Burns
Rats
Lasers
Analysis of variance (ANOVA)
Analysis of Variance
Wounds and Injuries
Nitrofurazone
Lysergic Acid Diethylamide
Semiconductor Lasers
Wound Healing
Staphylococcus aureus
Low-Level Light Therapy
Clinical Studies
Semiconductor lasers
Placebos
Skin
Control Groups
Infrared radiation

ASJC Scopus subject areas

  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

Cite this

Low-level laser therapy with a pulsed infrared laser accelerates second-degree burn healing in rat : A clinical and microbiologic study. / Ezzati, Ali; Bayat, Mohammad; Khoshvaghti, Amir.

In: Photomedicine and Laser Surgery, Vol. 28, No. 5, 01.10.2010, p. 603-611.

Research output: Contribution to journalArticle

@article{8415d6bea9dc4860833d1c81c0f34859,
title = "Low-level laser therapy with a pulsed infrared laser accelerates second-degree burn healing in rat: A clinical and microbiologic study",
abstract = "Objective: This study was carried out to investigate the influence of pulsed-wave low-level laser therapy (LLLT) on the healing of a deep second-degree burn model in rat. Background data: Review of literature indicates that LLLT has a biostimulatory effect on wound healing; however, no clear recommendation can yet be made. Methods: Two deep second-degree burns were made in the skin of 67 rats. Rats were divided into four groups. In the first group (control), the proximal burn were received LLLT with shot down laser; in the second and third groups, proximal burns were treated with a 3,000-Hz pulsed infrared diode laser with 2.3 and 11.7 J/cm2 energy densities, respectively. In the fourth group, the proximal burns were treated topically with 0.2{\%} nitrofurazone. The distal burn of all groups was considered the control burn. The response to treatment was assessed both microbiologically and macroscopically. Results: The incidence of Staphylococcus aureus decreased significantly in group 3 in comparison with group 1 on day 28 (χ2 test, p = 0.05). Analysis of variance showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 2 weeks (0.915 ± 0.310) and 3 weeks (0.677 ± 0.397) after burning compared with placebo burns (1.413 ± 0.319; 1.116 ± 0.436, respectively) ANOVA-LSD test, p = 0.045 and p = 0.046 respectively. Independent sample t tests showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 4 weeks after burning (0.211 ± 0.146) compared with the control burns (0.707 ± 0.480) p = 0.039. Conclusions: Pulsed LLLT with 11.7 J/cm2/890 nm of a deep second-degree burn model in rat significantly increased the rate of wound closure compared with control burns.",
author = "Ali Ezzati and Mohammad Bayat and Amir Khoshvaghti",
year = "2010",
month = "10",
day = "1",
doi = "10.1089/pho.2009.2544",
language = "English (US)",
volume = "28",
pages = "603--611",
journal = "Photomedicine and Laser Surgery",
issn = "1549-5418",
publisher = "Mary Ann Liebert Inc.",
number = "5",

}

TY - JOUR

T1 - Low-level laser therapy with a pulsed infrared laser accelerates second-degree burn healing in rat

T2 - A clinical and microbiologic study

AU - Ezzati, Ali

AU - Bayat, Mohammad

AU - Khoshvaghti, Amir

PY - 2010/10/1

Y1 - 2010/10/1

N2 - Objective: This study was carried out to investigate the influence of pulsed-wave low-level laser therapy (LLLT) on the healing of a deep second-degree burn model in rat. Background data: Review of literature indicates that LLLT has a biostimulatory effect on wound healing; however, no clear recommendation can yet be made. Methods: Two deep second-degree burns were made in the skin of 67 rats. Rats were divided into four groups. In the first group (control), the proximal burn were received LLLT with shot down laser; in the second and third groups, proximal burns were treated with a 3,000-Hz pulsed infrared diode laser with 2.3 and 11.7 J/cm2 energy densities, respectively. In the fourth group, the proximal burns were treated topically with 0.2% nitrofurazone. The distal burn of all groups was considered the control burn. The response to treatment was assessed both microbiologically and macroscopically. Results: The incidence of Staphylococcus aureus decreased significantly in group 3 in comparison with group 1 on day 28 (χ2 test, p = 0.05). Analysis of variance showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 2 weeks (0.915 ± 0.310) and 3 weeks (0.677 ± 0.397) after burning compared with placebo burns (1.413 ± 0.319; 1.116 ± 0.436, respectively) ANOVA-LSD test, p = 0.045 and p = 0.046 respectively. Independent sample t tests showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 4 weeks after burning (0.211 ± 0.146) compared with the control burns (0.707 ± 0.480) p = 0.039. Conclusions: Pulsed LLLT with 11.7 J/cm2/890 nm of a deep second-degree burn model in rat significantly increased the rate of wound closure compared with control burns.

AB - Objective: This study was carried out to investigate the influence of pulsed-wave low-level laser therapy (LLLT) on the healing of a deep second-degree burn model in rat. Background data: Review of literature indicates that LLLT has a biostimulatory effect on wound healing; however, no clear recommendation can yet be made. Methods: Two deep second-degree burns were made in the skin of 67 rats. Rats were divided into four groups. In the first group (control), the proximal burn were received LLLT with shot down laser; in the second and third groups, proximal burns were treated with a 3,000-Hz pulsed infrared diode laser with 2.3 and 11.7 J/cm2 energy densities, respectively. In the fourth group, the proximal burns were treated topically with 0.2% nitrofurazone. The distal burn of all groups was considered the control burn. The response to treatment was assessed both microbiologically and macroscopically. Results: The incidence of Staphylococcus aureus decreased significantly in group 3 in comparison with group 1 on day 28 (χ2 test, p = 0.05). Analysis of variance showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 2 weeks (0.915 ± 0.310) and 3 weeks (0.677 ± 0.397) after burning compared with placebo burns (1.413 ± 0.319; 1.116 ± 0.436, respectively) ANOVA-LSD test, p = 0.045 and p = 0.046 respectively. Independent sample t tests showed that LLLT with 11.7 J/cm 2 significantly increased the wound-closure rate at 4 weeks after burning (0.211 ± 0.146) compared with the control burns (0.707 ± 0.480) p = 0.039. Conclusions: Pulsed LLLT with 11.7 J/cm2/890 nm of a deep second-degree burn model in rat significantly increased the rate of wound closure compared with control burns.

UR - http://www.scopus.com/inward/record.url?scp=78751662958&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78751662958&partnerID=8YFLogxK

U2 - 10.1089/pho.2009.2544

DO - 10.1089/pho.2009.2544

M3 - Article

VL - 28

SP - 603

EP - 611

JO - Photomedicine and Laser Surgery

JF - Photomedicine and Laser Surgery

SN - 1549-5418

IS - 5

ER -