763. How does pulse oximetry work? / Conditions that may falsify pulse oximetry / Pulse oximetry in CO and MetHB / 3 levels of response of the colorimetric capnometer January 4th, 2009 by reuben in airway, resus Back Top Tags: card 762. How do most NIBP devices work? / When NIBP readings may be inaccurate / Indications for an arterial line 764. Usefulness of sublingual capnography / ACOG fetal monitoring recommendation post-trauma / Normal fetal HR range / Fetal monitoring signs that mandate obstetrics referral Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.