Your patient is a 60-year-old male with an LVAD. He takes warfarin and lisinopril. He complains of weakness and severe fatigue, and states he has been passing black, tarry stools for the past 48 hours. Of the following, which is NOT a reliable indirect measure of this patient's perfusion?
A. Color of mucous membranes
B. Waveform capnography and etCO2 readings
C. Urinary output
D. Presence, rate and character of radial pulse - Correct Answer
E. Level of consciousness
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