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A oximetria de pulso refere-se à quantidade de oxigênio que é transportada no sangue ligada à hemoglobina. Os oxímetros de pulso medem a saturação da hemoglobina, baseando-se na densidade do sangue arterial (emite uma onda luminosa com um comprimento diminuído) e no uso de dois comprimentos de onda, na faixa de 100nm (faixa vermelha) e 200nm (faixa infravermelha).
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