Which oxygen delivery system delivers the highest concentration of oxygen?

Which of the following is NOT an example of "established patient documentation"?

A. This new patient presents B. Patient is new to the area C. Patient has been referred to me D. Patient is well known to me

During examination of a patient's extremities, you press firmly for a brief period on a fingernail

You observe that it takes approximately 5 sec for the color to return to the nail bed. This finding is most consistent with which of the following? a. Reduction in cardiac output or poor pe-ripheral perfusion b. Presence of a disorder causing chronic hypoxemia c. Reduction in venous return to the right side of the heart d. Presence of a disorder causing systemic hypertension