PULSE EXIMETER CALIBRATOR

脉搏血氧仪制造商目前的做法是校准一个 在装运前根据基于以下条件的校准曲线 从一组人类受试者身上获得的测量结果。没有检查的手段 脉搏血氧仪在临床上的校准现已存在。我们是 设计一种用于脉搏血氧饱和度校准的装置 含不同馏分的脉动毛细管床的光学性质 含氧和脱氧的血红蛋白。校准器的设计是 基于液晶光调制器，用于设置DC和 调制(交流)光强度通过“毛细管床”。通过 调整红线中波长范围内的交流/直流强度比 (630-690 nm)和红外(800-1000 nm)可设置血氧计的显示 恢复到所需的氧饱和度(SO2)值。

Current practice among manufacturers of pulse oximeters is to calibrate an instrument prior to shipment according to a calibration curve based on measurements obtained from a group of human subjects. No means for checking the calibration of pulse oximeters in the clinic now exists. We are designing a device for calibrating pulse oximeters that simulates the optical properties of a pulsating capillary bed containing various fractions of oxygenated and deoxygenated hemoglobin. The design of the calibrator is based on liquid-crystal light modulators which are used to set the dc and modulated (ac) light intensities passing through the "capillary bed. " By adjusting the ac/dc intensity ratios in wavelength bands in the red (630-690nm) and infrared (800-1000nm) the display of the oximeter can be set to the desired oxygen saturation (SO2) value.