Green light photoplethysmography monitoring of free flaps
Green light photoplethysmography monitoring of free flaps
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DOI：
10.1001/archotol.126.5.659
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发表时间：
2000-05-01
影响因子：
--
通讯作者：
Scharf, JE
中科院分区：
文献类型：
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作者：
Futran, ND;Stack, BC;Scharf, JE
背景：已经制定了监测策略来解决检测术后游离午睡缺血的问题，以便进行干预和皮瓣抢救。现有的无创方法还没有被临床广泛接受。绿光光电体积描记法 (GLP) 使用二极管将绿光传输到组织中。真皮毛细血管红细胞中血红蛋白的反射光被分析为沿频谱的光强度。识别纯峰值信号 (1-2 Hz)，并提供区分灌注和非灌注组织的方法。 设计：前瞻性、盲法比较。 受试者： 72 名连续考虑进行游离皮瓣重建的患者中的 60 名被纳入评估 GLP 疗效的方案。 干预： 游离皮瓣抬高后但蒂结扎前，获得 120 秒基线测量值；然后在个别静脉或动脉闭塞发生或解除后 5 分钟进行 120 秒的测量。信号通过快速傅立叶传输进行处理；计算每个信号的平均交流电-直流电 (AC/DC) 比率。所有数据均以盲法进行分析。 结果：GLP 的 AC/DC 比值在所有皮瓣灌注状态下均具有统计学显着性（P
Background: Monitoring strategies have been developed to address the issue of detecting postoperative free nap ischemia in an effort to permit intervention and flap salvage. No one existing noninvasive method has been widely accepted in a clinical setting. Green light photoplethysmography (GLP) uses a diode to transmit green light into a tissue. Reflected light from hemoglobin in dermal capillary red blood cells is analyzed as light intensity along a frequency spectrum. A pure peak signal (1-2 Hz) is identified and provides a way to distinguish between perfused and nonperfused tissue.Design: Prospective, blinded comparison.Subjects: Sixty of 72 consecutive patients considered for free flap reconstruction were enrolled in a protocol to evaluate the efficacy of GLP.Intervention: After free flap elevation, but before pedicle ligation, 120-second baseline measurements were obtained; 120-second measurements then occurred 5 minutes after the onset or release of individual venous or arterial occlusion. Signals were processed by fast Fourier transfer; a mean alternating current-direct current (AC/ DC) ratio was cultivated for each signal. All data were analyzed in a blinded fashion.Results: The AC/DC ratio of GLP was statistically significant across all flap perfusion states (P