CCRN Questions And Answers 100% Pass
A patient has had a large anterior myocardial infarction last month and developed a ventricular
aneurysm. He now has episodes of ventricular tachycardia that are not prevented or converted
with antidysrhythmic agents. An implantable cardioverter-defibrillator...
A patient has had a large anterior myocardial infarction last month and developed a ventricular
aneurysm. He now has episodes of ventricular tachycardia that are not prevented or converted
with antidysrhythmic agents. An implantable cardioverter-defibrillator (ICD) is implanted. Four
days after surgery he develops ventricular tachycardia. The ICD has delivered three shocks but
has not converted the rhythm. He is pulseless and apneic. Cardiopulmonary resuscitation is in
progress. What is the priority action now?
A.
Administer epinephrine IV.
B.
Administer amiodarone.
C.
Defibrillate.
D.
Reset the ICD. - answer✔Defibrillate
A 28-year-old woman is admitted to the critical care unit from the emergency department with a
diagnosis of asthma. Her initial arterial blood gases on a 28% Venturi mask are as follows:
Which of the following repeat arterial blood gases on 40% oxygen indicate that the patient's
condition is worsening?
A.
pH 7.48, PaCO2 30 mm Hg, PaO2 68 mm Hg
B.
pH 7.46, PaCO2 32 mm Hg, PaO2 61 mm Hg
C.
pH 7.40, PaCO2 40 mm Hg, PaO2 62 mm Hg
D.
pH 7.39, PaCO2 30 mm Hg, PaO2 60 mm Hg - answer✔C.
pH 7.40, PaCO2 40 mm Hg, PaO2 62 mm Hg
The case study shows stage II asthma. Option c shows stage III asthma. The patient is still
breathing at a fast rate, but carbon dioxide is starting to be retained as evidenced by the increase
of the PaCO2 into normal range. Options a and b are still stage II. Option d shows a respiratory
alkalosis with a metabolic acidosis because you would have expected the pH to be in an alkalotic
range with the PaCO2 of 30.
A patient experiencing alcohol withdrawal syndrome describes the swirls in the wallpaper as
being worms. This is an example of which of the following?
An illusion is a misperception or misinterpretation of an actual external stimulus. Illusions and
hallucinations (a perception that has no actual external stimulus) are common during alcohol
withdrawal syndrome.
A patient arrives in the emergency department with multiple gunshot wounds. He requires
massive transfusion for blood loss from chest and abdominal wounds. The electrocardiogram
should be observed closely for changes indicative of which of the following?
Banked blood is high in potassium because of hemolysis. Look for tall, peaked T waves and
widening of the QRS complex. Other considerations with massive transfusion of banked blood
are hypocalcemia, hypothermia, and decreased tissue oxygen delivery caused by decreased levels
of 2,3-diphosphoglycerate.
A 65-year-old woman reports severe dyspnea 2 days after abdominal surgery. She is transferred
to the critical care unit. On 5 L of oxygen by nasal cannula, her arterial blood gases are as
follows:
pH 7.39
PaCO2 35 mm Hg
HCO3 19 mEq/L
PaO2 40 mm Hg
Arterial oxygen saturation 75%
Why does this patient have hypoxemia without hypercapnia?
A.
Because carbon dioxide is more diffusible than oxygen
B.
Because carbon dioxide has more driving pressure
C.
Because carbon dioxide is less diffusible than oxygen
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Brightstars. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
