Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany.
Sci Rep. 2023 Sep 24;13(1):15939. doi: 10.1038/s41598-023-43151-5.
Unattached surface probes are commonly used with the O2C analysis system (LEA Medizintechnik, Germany) to monitor microvascular free flap perfusion. This study compared attached and unattached surface probes for extraoral free flaps. The study included 34 patients who underwent extraoral microvascular head and neck reconstruction between 2020 and 2022. Flap perfusion was monitored postoperatively using the O2C analysis system at 0, 12, 24, 36, and 48 h, with an attached surface probe at 3 mm tissue depth and an unattached surface probe at 2 mm and 8 mm tissue depths. Clinical complications, technical errors, and perfusion measurement values were compared. No clinical complications (attachment suture infections) or technical errors (probe detachment) occurred. Flap blood flow values of the probes were partially different (3 mm vs. 2 and 8 mm: p < 0.001; p = 0.308) and moderately correlated (3 mm with 2 and 8 mm: r = 0.670, p < 0.001; r = 0.638, p < 0.001). Hemoglobin concentration and oxygen saturation values were generally different (3 mm vs. 2 and 8 mm: all p < 0.001) and variably correlated (3 mm with 2 and 8 mm: r = 0.756, r = 0.645; r = 0.633, r = 0.307; all p < 0.001). Both probes are comparable in terms of technical feasibility and patient safety, with flap perfusion values dependent on tissue measurement depth.
未附着表面探头常用于 O2C 分析系统（德国 LEA Medizintechnik）以监测微血管游离皮瓣灌注。本研究比较了附着式和未附着式表面探头在口腔外游离皮瓣中的应用。研究纳入 2020 年至 2022 年间行口腔外头颈部微血管重建的 34 例患者。术后使用 O2C 分析系统在 0、12、24、36 和 48 小时监测皮瓣灌注情况，在 3mm 组织深度使用附着式表面探头，在 2mm 和 8mm 组织深度使用未附着式表面探头。比较临床并发症、技术误差和灌注测量值。未发生临床并发症（附着缝线感染）或技术误差（探头脱落）。探头的皮瓣血流值部分不同（3mm 与 2mm 和 8mm：p<0.001;p=0.308）且中度相关（3mm 与 2mm 和 8mm：r=0.670,p<0.001;r=0.638,p<0.001）。血红蛋白浓度和氧饱和度值总体不同（3mm 与 2mm 和 8mm：均 p<0.001）且有差异相关（3mm 与 2mm 和 8mm：r=0.756,r=0.645;r=0.633,r=0.307;均 p<0.001）。两种探头在技术可行性和患者安全性方面具有可比性，皮瓣灌注值取决于组织测量深度。
