首页> 外文会议>Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE >Correction of the influences of a subcutaneous fat layer and skin in a near-infrared muscle oximeter
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Correction of the influences of a subcutaneous fat layer and skin in a near-infrared muscle oximeter

机译:校正近红外肌肉血氧仪中皮下脂肪层和皮肤的影响

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The inhomogeneity of tissue structure greatly affects the sensitivity of tissue oxygenation measurement by reflectance NIRS. We have proposed a method for correcting the influence of a subcutaneous fat layer on muscle oxygenation measurement. The correction is based on an inverse relationship between the measurement sensitivity and detected light intensity. In this study, this method was validated by measuring the peak-to-peak variation of muscle oxygenation in periodic exercise tests on the vastus lateralis. A multisensor probe consisting of a light source and four photodiodes with source-detector distances of 7-40 mm was newly developed. A proximal detector with a 7-mm separation was used to eliminate the effect of skin. The fat layer thickness was also measured by ultrasonography. Results of the tests clearly showed that the presence of a fat layer greatly decreases the sensitivity of measurement and increases the light intensity at the detectors. Sensitivity correction by detected light intensity resulted in almost the same changes in muscle oxygenation due to periodic exercise among subjects regardless of different fat layer thicknesses. The proximal detector was also effective for reducing the effect of skin.
机译:组织结构的不均匀性极大地影响了通过反射网德的组织氧合测量的敏感性。我们提出了一种校正皮下脂肪层对肌肉氧合测量的影响的方法。校正基于测量灵敏度与检测到的光强度之间的反向关系。在该研究中,通过测量睫毛侧面的周期性运动试验中的肌肉氧合的峰 - 峰值变化来验证该方法。新开发了一种由光源和具有源检测器距离为7-40mm的光源的多传感器探针。使用具有7mm分离的近端检测器消除皮肤的效果。通过超声检查还测量脂肪层厚度。测试结果清楚地表明,脂肪层的存在大大降低了测量的灵敏度,并增加了探测器处的光强度。由于不同的脂肪层厚度,检测到的光强度受到检测到光强度的敏感性校正导致肌肉氧合的几乎相同的变化。近端检测器也有效降低皮肤的效果。

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