In this hospital, pulse oximeters went from overestimating to underestimating blood oxygen. Why?

Researchers found pulse oximeters went from overestimating blood oxygen levels to underestimating them; inaccuracies were worse in patients of color.

約翰斯·霍普金斯醫院五年數據顯示，同一型號脈搏血氧儀從高估血氧逐漸轉為低估，且有色人種患者偏差更大。研究者與廠商對原因各執一詞，設備讀數的不一致讓臨床判斷更加困難。