Consider a 45 year-old HIV positive male with right hemiparesis and fluctuating conscious state. His CT head is shown below.
A 32 year-old woman is referred to the ICU post caesarean section. In the last 2 hours she has developed vaginal bleeding and oozing from her epidural site.
A 27 year old female with metastatic ovarian cancer for whom treatment options have been exhausted arrives in the ED in extremis.
21 year-old presenting to the emergency department with fevers and agitation. His lumbar puncture confirms Gram Negative Diplococci
What is the explanation for the discrepancy between the oxygen saturations on pulse oximetry and on arterial blood gas analysis in this patient?