对胎羊反射式脉搏血氧饱和度仪在动脉血氧饱和度低于70%时的校准。
Calibration of a reflectance pulse oximeter in fetal lambs for arterial oxygen saturations below 70%.
作者信息
Carter A M, Stiller R, König V, Jørgensen J S, Svendsen P, Huch R
机构信息
Department of Physiology, University of Odense, Denmark.
出版信息
J Soc Gynecol Investig. 1998 Sep-Oct;5(5):255-9. doi: 10.1016/s1071-5576(98)00024-0.
OBJECTIVE
To calibrate a reflectance pulse oximeter developed at the Division of Perinatal Physiology, University Hospital of Zurich, for monitoring of oxygen saturations below 70%.
METHODS
Oxygen saturation measured noninvasively with the reflectance pulse oximeter in fetal sheep was compared with oxygen saturation of arterial blood samples measured by a conventional two-wavelength oximeter. Oxygen saturation was varied by stepwise reduction of the inspired oxygen concentration of the ewe.
RESULTS
A total of 58 data pairs was obtained from five fetuses, with a range of 10.9-73.5% for the reference method and 6.8-69.2% for the pulse oximetry oxygen saturation values. There was good correlation between the results obtained by the two methods (r2 = .89, P < .0001), with a 95% confidence interval of +/- 12.5%. The pulse oximeter showed a precision of 6.2% oxygen saturation.
CONCLUSION
The Zurich reflectance pulse oximeter offers valid measurements of oxygen saturation levels down to 10% oxygen saturation, and is therefore suitable for monitoring the fetus during delivery.
目的
校准苏黎世大学医院围产期生理学部门研发的反射式脉搏血氧仪，用于监测低于70%的血氧饱和度。
方法
将在胎羊中使用反射式脉搏血氧仪无创测量的血氧饱和度与通过传统双波长血氧仪测量的动脉血样本的血氧饱和度进行比较。通过逐步降低母羊的吸入氧浓度来改变血氧饱和度。
结果
从5只胎儿中总共获得了58对数据，参考方法的范围为10.9 - 73.5%，脉搏血氧测定法的血氧饱和度值范围为6.8 - 69.2%。两种方法所得结果之间具有良好的相关性（r2 = 0.89，P < 0.0001），95%置信区间为±12.5%。脉搏血氧仪显示血氧饱和度的精度为6.2%。
结论
苏黎世反射式脉搏血氧仪能够有效测量低至10%血氧饱和度水平，因此适用于分娩期间监测胎儿。
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