Prevention of Abdominal Adhesions and Healing Skin After Peritoniectomy Using Low Level Laser

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Adhesions commonly occur after abdominal surgery and can cause bowel obstruction, chronic abdominal pain, and infertility. Their prevention remains a challenge.


To evaluate the effects of the application of low-level lasers on the prevention of adhesions and scarring of the skin after peritoniectomia.


Twenty-four New Zealand breed male rabbits, approximately 2 months of age, were randomly divided into 3 groups (n = 8): GC—control group not subjected to laser, GL1—group with laser application at a dose of 0.2 J, and GL2—group with laser application at a dose of 3.6 J. All animals received a longitudinal midline incision and a bilateral resection of the peritoneal fragment, measuring 3 × 1 cm2. The animals received a laser treatment of one application every 24 hours, beginning at the time of surgery and lasting for a period of 4 days. After 14 days post-surgery, the animals were killed and adhesion formation was evaluated qualitatively and quantitatively by means of a laparotomy shaped inverted “U”, which allowed for the verification of the broad wall of the abdominal cavity and organs. Differences were considered significant at P < 0.05.


The adhesion formation was observed in 100% of the rabbits from groups GC and GL1, as compared to 37.5% of the rabbits from group GL2 (P < 0.01). The evaluation of the vascularization and tenacity of adhesions among the groups showed no significant difference. In groups CG and GL1, 72% and 83% of adhesions were verified between visceras, respectively whereas in GL2 occurred among abdominal wall. The tensile strength of the skin between the groups was not significant (P = 0.3106). The resistance of abdominal wall segments without skin he resistance of skin segments between groups GL2 and GC were higher than in GL1 (P = 0.01).


Low-level LASER is effective in preventing intra-abdominal adhesions in rabbits without compromising strength and healing of the abdominal wall. Lasers Surg. Med. 47:817–823, 2015. © 2015 Wiley Periodicals, Inc.

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