Medical Radiology and Radiation Safety. 2014. Vol. 59. No. 3. P. 5-11

RADIATION BIOLOGY

N.I. Zargarova, O.O. Vladimirova, V.I. Legeza, A.N. Grebenyuk

Modeling of the Deep Injures of Skin in Experiment on Rats

S.M. Kirov Military Medical Academy, St. Petersburg. Е-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

ABSTRACT

Purpose: Modeling of deep skin burn from Χ-ray irradiation in experiment on rats.

Material and methods: The model of skin burns of III-b degree were obtained with using Χ-ray irradiation to 10 % of body surface in white inbred rats of weight 180–200 g. For physical shielding of subcutaneous tissues and internal organs a lead plate placed under skin was used. As a source of Χ-ray irradiation apparatus RUM-17 at a voltage on a tube 250 kV, with anodic current 15 mA, skin-focal length of 25 cm, without filters, dose rate of 3,3 Gy/min was used.

Results: The carried out clinical and morphologic observation showed, that a Χ-ray irradiation of skin with doses 10, 15, 20, 25, 30 Gy caused peeling and reddening with few scabs, which fled after 34–39 days. Irradiation of depilated skin with dose of 60, 90 and 180 Gy caused appearing of equal by the area deep skin burns with distinct division into periods of wound process. After irradiation of skin with dose of 60 and 90 Gy the duration of latent period was about 6–8 days, the period of exudation – about 4–5 days, scab formation occurred within 12–14 days. After irradiation of skin with dose of 180 Gy the duration of latent period was not longer 5–6 days, duration of the period of expressed clinical manifestations tended to increase, and scab formation was about 10–11 days. The period of reparation after irradiation with doses 60, 90 and 180 Gy was practically identical. A scab disappearing began 20–22 days after Χ-ray exposure, the period of healing proceeded within 44–49 days, and by 50–70 days after an irradiation process ended with formation of a scar. There were no animal death during the experimental study period.

Conclusion: Modeling standard on the area and depth of burns of skin of III-b degree with distinct phases of injury in experiment on rats can be achieved by irradiation with Χ-ray radiation in doses 60, 90 and 180 Gy with physical shielding of subcutaneous tissues and internal organs with leaden plate entered under the irradiated site of a skin of a laboratory animal.

Key words: Χ-ray radiation, skin, radiation injury, deep burn, destructive phase, reparative phase, morphology of skin