摘要
To the Editor:The latest generation of pulse oximeters are equipped with technology allowing for monitoring of the peripheral perfusion index(PI),the percentage of the amount of light absorbed by pulsatile tissue(variable arterial blood flow)over non-pulsatile tissue(venous blood,muscle,and other tissues)at a wavelength of 940 nm as a signal.
基金
This study was supported by grants from the National Key Research and Development Project of China(No. 2016YFC1000500)
Scientific Research Project of Shanghai Municipal Health and Family Planning Commission(No. 201740279)
Shanghai Science and Technology Commission(No. 18495810800)
Innovation Unit of Chinese Academy of Medical Science(No. 2018RU002)。
