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Solution Manual for
Winningham’s Critical
Thinking Cases in
Nursing 6th Edition
Mariann M. Harding
Julie S. Snyder
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PART ONE Medical-Surgical Cases
Cardiovascular Disorders 1
Case Study 1 Heart Failure
Difficulty: Beginning
Setting: Emergency department, hospital
Index Words: heart failure (HF), cardiomyopathy, volume overload, patient education
Giddens Concepts: Fluid and Electrolyte Balance, Perfusion, Patient Education
HESI Concepts: Assessment, Fluid and Electrolyte, Perfusion, Patient Education
u Scenario
M.G., a “frequent flier,” is admitted to the emergency department (ED) with a diagnosis of heart failure
(HF). She was discharged from the hospital 10 days ago and comes in today stating, “I just had to come
to the hospital today because I can't catch my breath and my legs are as big as tree trunks.” After further
questioning, you learn that she is strictly following the fluid and salt restriction ordered during her last
hospital admission. She reports gaining 1 to 2 pounds every day since her discharge.
1. What error in teaching most likely occurred when M.G. was discharged 10 days ago?
A breakdown of successful communication occurred regarding when to call with early weight
gain. It is imperative that patients understand when to call their provider after being discharged
from the hospital for exacerbated HF. Comprehensive patient education starting at admission is
considered a standard of care and is mandated by The Joint Commission when care is provided to
hospitalized patients. The goal of the discharge treatment plan is to facilitate successful patient self-
management, minimize symptoms, and prevent readmission.
CASE STUDY PROGRESS
During the admission interview, the nurse makes a list of the medications M.G. took at home.
Chart View
Nursing Assessment: Medications Taken at Home
Enalapril (Vasotec) 5 mg PO bid
Pioglitazone (Actos) 45 mg PO every morning
Furosemide (Lasix) 40 mg/day PO
Potassium chloride 20 mEq/day PO
2. Which of these medications may have contributed to M.G.'s HF? Explain.
Thiazolidinediones, such as pioglitazone, may increase the risk of HF and should not be used in
patients with symptoms of HF. They commonly cause peripheral edema and weight gain (which are
the result of both water retention and increased deposit of adipose tissue).
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PART 1 MEDICAL-SURGICAL CASES
3. How do angiotensin-converting enzyme (ACE) inhibitors, such as enalapril (Vasotec), work
1 Cardiovascular Disorders
to reduce HF? Select all that apply. ACE inhibitors:
a. prevent the conversion of angiotensin I to angiotensin II.
b. cause systemic vasodilation.
c. promote the excretion of sodium and water in the renal tubules.
d. reduce preload and afterload.
e. increase cardiac contractility.
f. block sympathetic nervous system stimulation to the heart.
Answers: a, b, d
ACE inhibitors prevent the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor.
This results in systemic vasodilation, thereby reducing preload (reducing the volume of blood
entering the left ventricle) and afterload (reducing the resistance to the left ventricular contraction)
in patients with HF. ACE inhibitors do not promote the excretion of sodium and water, and they do
not cause increased cardiac contractility or block the sympathetic nervous system to the heart.
CASE STUDY PROGRESS
After reviewing M.G.'s medications, the physician writes the following medication orders.
Chart View
Medication Orders
Enalapril (Vasotec) 5 mg PO bid
Carvedilol (Coreg) 3.125 mg PO twice daily
Glipizide (Glucotrol) 10 mg PO every morning
Furosemide (Lasix) 80 mg intravenous push (IVP) now, then 40 mg/day IVP
Potassium chloride (K-Dur) 20 mEq/day PO
4. What is the rationale for changing the route of the furosemide (Lasix)?
M.G. is fluid overloaded and needs to decrease fluid volume in a short period. Intravenous
administration is delivered directly into the vascular system, where it can start to work immediately.
In HF, blood flow to the entire gastrointestinal (GI) system is compromised; therefore the absorption
of orally ingested medications may be variable and take longer to work.
5. You administer furosemide (Lasix) 80 mg IVP. Identify three parameters you would use to
monitor the effectiveness of this medication.
• Increased urine output
• Daily weight, looking for weight loss
• Intake and output (I&O)
• Decreased dependent edema
• Decreased shortness of breath, diminished crackles in the bases of the lungs, decreased work of
breathing, and decreased O2 demands
• Decreased jugular venous distention (JVD)
6. What laboratory tests should be ordered for M.G. related to the order for furosemide (Lasix)?
Select all that apply.
a. Magnesium level
b. Sodium level
c. Complete blood count (CBC)
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PART 1 MEDICAL-SURGICAL CASES CASE STUDY 1
d. Serum glucose level
e. Potassium level
f. Coagulation studies
Answers: a, b, d, e
Furosemide is a potent diuretic, especially when given via IVP, and may cause the loss of
electrolytes such as magnesium, sodium, and potassium. These electrolytes will need to be
supplemented if the levels are low. In addition, furosemide may increase serum glucose levels, which
is an issue, considering that M.G. has diabetes. It is not necessary to monitor CBC or coagulation
studies while the patient is on furosemide.
7. What is the purpose of the beta blocker carvedilol? It is given to:
a. increase the contractility of the heart.
b. cause peripheral vasodilation.
c. increase urine output.
d. reduce cardiac stimulation from catecholamines.
Answer: d
Beta-blockers reduce or prevent stimulation of the heart from circulating catecholamines.
8. You assess M.G. for conditions that may be a contraindication to carvedilol. Which
condition, if present, may cause serious problems if the patient takes this medication?
a. Angina
b. Asthma
c. Glaucoma
d. Hypertension
Answer: b
Blocking of beta2 receptors leads to a decrease in bronchial smooth muscle relaxation,
or bronchoconstriction. Nonspecific (nonselective) beta-blocking drugs may precipitate
bronchoconstriction and/or increased airway resistance. Therefore any preexisting respiratory
condition such as asthma might be worsened by the concurrent use of any of these medications.
CASE STUDY PROGRESS
One day later, M.G. has shown only slight improvement, and digoxin (Lanoxin) 125 mcg PO daily is added
to her orders.
9. What is the action of the digoxin? Digoxin:
a. causes systemic vasodilation.
b. promotes the excretion of sodium and water in the renal tubules.
c. increases cardiac contractility and cardiac output.
d. blocks sympathetic nervous system stimulation to the heart.
Answer: c
Digoxin works by increasing cardiac contractility and thus increasing cardiac output.
10. Which findings from M.G.'s assessment would indicate an increased possibility of digoxin
toxicity? Explain your answer.
a. Serum potassium level of 2.2 mEq/L
b. Serum sodium level of 139 mEq/L
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