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1. A patient with a history of chronic obstructive
pulmonary disease (COPD) is admitted to the hospital with
an acute exacerbation. The nurse is preparing to administer
oxygen therapy to the patient. Which of the following is the
most appropriate oxygen delivery device for this patient?
a) Nasal cannula
b) Simple face mask
c) Non-rebreather mask
d) Venturi mask*
Rationale: A Venturi mask delivers a precise concentration
of oxygen and is suitable for patients with COPD who are
at risk of carbon dioxide retention. A nasal cannula, a
simple face mask, and a non-rebreather mask deliver
variable concentrations of oxygen and may cause
respiratory depression in patients with COPD.
2. A patient with a history of diabetes mellitus is scheduled
for a colonoscopy. The patient is instructed to take a bowel
preparation solution the night before the procedure. The
nurse reviews the patient's medication list and notes that
the patient is taking metformin. What is the most
appropriate nursing action in this situation?
a) Instruct the patient to continue taking metformin as
prescribed
b) Instruct the patient to stop taking metformin 48 hours
before the procedure*
c) Instruct the patient to take half the dose of metformin on
the day of the procedure
d) Instruct the patient to resume taking metformin after the
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