Clinical study on the use of diode LASER for the excision of superficial growths in canine
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Date
2020
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Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana
Abstract
The study was conducted in two parts. Part I included standardization of diode LASER on six adult canine cadavers, of either sex, to find out optimum power settings (watt at wavelength 980nm) required to make a 3 cm full thickness skin incision. Part II included 18 clinical cases of dogs (15 male and 3 female) of various breeds with a mean ± SD age of 6.57 ± 2.55 year which were suffering from superficial growth (11 benign and 7 malignant) from 4.47 ± 2.82 months. The results of the part I revealed that as the power setting was increased (6W to 8W, 10W or 12W), the total energy absorbed by tissues and total time required was reduced significantly. Lower power setting (6W) was associated with more severe charring as compared to that at higher power. Microscopically, highest mean thermal damage was observed at 6W and 12W as compared to that at 10W and 8W. Analysing various parameters (part I), the power settings of 8W and 10W were assessed as optimum for making skin incision in dogs. Thus, growths in Group I (less than 2cm) and Group II (2-5 cm) were excised using diode LASER at 8W; whereas, 10W was used in Group III (5-10 cm). Size of the superficial growth influenced the degree of charring, haemorrhage, total energy absorbed and time required for complete excision; however, degree of charring as mild versus moderate or severe could not be correlated with total energy absorbed. Presence of inflammation and oedema, quality of scar and cosmetic appearances were found to be associated with the size of growth. Majority surgical wounds healed by primary intention. Three cases had wound dehiscence probably associated with site of growth near elbow or stifle joint and 2 had local recurrence of growths (mast cell tumour and osteosarcoma). In conclusions, diode LASER surgery is associated with minimum intraoperative haemorrhages and postsurgical wound related complications with acceptable scar and cosmetic appearance of healed wounds. Diode LASER (at 980 nm wavelength) is recommended as a safe alternative surgical tool at 8W and 10W for the excision of superficial growths of size <5 cm and 5-10 cm, respectively, in dogs.
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T1844