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Objectives: Monitoring viability of flap is important. The flap survival depends on the vascularity of the flap, on which the skin temperature depends. The authors applied digital infrared thermographic imaging (DITI) for monitoring the vascular supply of the flap and for the prediction of the prognosis of the flap survival. Methods: Eight male New Zealand white rabbits with average weight of 3kg were used. A 10 x 10 cm unipedicled fasciocutaneous island flap was elevated based on the left superficial inferior epigastric vessel. The surface temperatures on designed flap were checked with DITI for 24 hours after the operation. On 14th day after the operation, the surviving area was measured and compared with DITI image which was taken on 24 hours after the operation using digital analysis software ImageJ. Statistical analysis was evaluated by paired T-test Results: On DITI image 24 hours after the flap elevation, distal portion of the flap showed remarkable color change. The average percentage and the standard deviation of the survival area of the flap which is predicted by DITI and the average percentage and the standard deviation of the survival area of the flap which was actually measured 2 weeks after flap elevation were 55.3 (16.6), 56.2 (18.0), respectively. This shows no significant difference between the two. Conclusions: This study shows that DITI system could be used in evaluation of flap vascularity with ease, quickness and safety for patient and flap. Thus, it could be used clinically for the prediction of flap survival.

gosin daehakgyo uigwa daehak haksulji/kosin medical journal

Application of Digital Infrared Thermographic Imaging (DITI) in the Monitoring of Change of Skin Temperature about Vascular Supply of Lower Abdominal Axial Flap in the Rabbit