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A 66-year-old man with poorly controlled type 2 diabetes is admitted to the hospital due to a 2-day history of fever and confusion. Blood pressure is 110/50 mm Hg. Pulse oximetry shows an oxygen saturation of 97% on room air. Examination reveals warm extremities with full peripheral pulses, an infected neuropathic foot ulcer with surrounding cellulitis, and normal lung sounds. A central venous catheter terminating in the superior vena cava is placed. Blood aspirated from the catheter appears red. Blood gas analysis of this venous sample reveals an oxygen saturation of 87% (normal: 65%-70%) , and lactate is moderately elevated. Which of the following is the most likely cause of this patient's abnormal blood gas findings?
Middle-Class White Americans
A demographic group in the United States characterized by having a moderate level of income and education, and identifying racially as white.
Negotiate Public Space
The ways in which individuals or groups navigate, use, and share communal spaces in society, often highlighting dynamics of power, accessibility, and social norms.
Vulnerabilities
States or conditions of being susceptible to harm, damage, or exploitation, often due to societal, economic, or environmental factors.
Heterosexuality
A sexual orientation characterized by a romantic or sexual attraction between individuals of the opposite sex.
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