Yang K, Liu W
College of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
J Med Eng Technol. 2008 Jan-Feb;32(1):73-82. doi: 10.1080/03091900600836451.
The step-temperature technique is a thermal technique that uses a small thermistor probe for measuring blood perfusion of tissue. The blood perfusion is derived from temperature and power measurements using equations that describe heat transfer in the integrated probe/tissue system. A numerical experiment is used to analyse the theoretical error caused by the assumptions used in the technique. The effects of the bead parameters, tissue parameters and measurement parameters are investigated. The study results are in accordance with experimental phenomena described previously. An optimal measurement time window is found to be 4-10 s, dependent mainly on the thermal conductivity and blood perfusion of tissue measured. This research will lead to reduce perfusion measurement errors.
阶跃温度技术是一种热技术,它使用小型热敏电阻探头来测量组织的血液灌注。血液灌注是通过使用描述集成探头/组织系统中热传递的方程,从温度和功率测量中得出的。通过数值实验来分析该技术中所使用假设引起的理论误差。研究了珠子参数、组织参数和测量参数的影响。研究结果与先前描述的实验现象一致。发现最佳测量时间窗口为4 - 10秒,这主要取决于所测量组织的热导率和血液灌注。这项研究将有助于减少灌注测量误差。