ArticleEuropean archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery2025
Smartphone-based thermal imaging for pedicled skin flaps: a pilot study toward objective perfusion assessment in facial, head, and neck reconstruction.
Article in European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis study aims to develop a practical algorithm for utilizing smartphone-based thermal imaging (SBTI) in the perioperative setting and to establish a standardized evaluation method for objectively assessing SBTI images for cutaneous perfusion of pedicled flaps in the face, head, and neck.
methodsThis prospective conducted study, integrated SBTI into the assessment of 16 patients undergoing reconstructive surgery for face and neck defects. Thermal images were captured at four timepoints: after marking (T1), after flap elevation (T2), upon completion of surgery (T3), and 24 h postoperatively (T4). The flap areas were divided into three flap zones and graded based on temperature differences (ΔT), with a grading system where grade 1 indicated perfect perfusion and grades 2 to 5 indicated increasing perfusion impairment.
results6 male and 10 female patients aged 64-93 years (mean 78.5 years) undergoing reconstructive pedicled skin flap surgery for facial and neck defects (1 × 1 cm to 11 × 8 cm) due to diagnoses of malignant cutaneous lesions were investigated. Intraoperative assessments indicated good perfusion across flaps. One postoperative dehiscence occurred in an 83-year-old male with a cervical advancement flap, correlated with a significant temperature difference (ΔT > 4 °C) intraoperatively. Statistical analysis revealed a strong positive correlation (p = 0.0003) between clinical assessment grades and ΔT values between specific flap zones at T3.
conclusionSBTI is an easy-to-apply, low-cost, real-time and reproducible technique for indirect perfusion assessment in pedicled skin flaps of the head and neck region. Further studies are needed implementing this methodology in large and free flaps.
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