Nursing Elites

1. The nurse analyzes the results of a patient's arterial blood gases (ABGs). Which finding would require immediate action?

• A. The bicarbonate level (HCO3) is 31 mEq/L
• B. The arterial oxygen saturation (SaO2) is 92%
• C. The partial pressure of CO2 in arterial blood (PaCO2) is 31 mm Hg
• D. The partial pressure of oxygen in arterial blood (PaO2) is 59 mm Hg

Correct answer: D

Rationale: While all the values are abnormal, the low PaO2 level of 59 mm Hg indicates that the patient is at a critical point on the oxyhemoglobin dissociation curve. At this level, a small decrease in PaO2 can lead to a significant drop in oxygen saturation and compromise tissue oxygenation. Therefore, immediate intervention is necessary to improve the patient's oxygenation status. Choice A (HCO3 of 31 mEq/L) may indicate metabolic alkalosis or compensation for respiratory acidosis; however, it does not require immediate action in this scenario. Choice B (SaO2 of 92%) is slightly low but not critically low to require immediate action. Choice C (PaCO2 of 31 mm Hg) is within the normal range and does not indicate immediate danger to the patient.

2. While taking the health history of a 70-year-old patient being treated for a Duodenal Ulcer, the nurse learns that the patient is complaining of epigastric pain. What assessment finding would the nurse expect to note?

• A. Melena
• B. Nausea
• C. Hernia
• D. Hyperthermia

Correct answer: A

Rationale: Melena is the passage of black, tarry stools due to the presence of blood in the gastrointestinal tract, usually originating from the upper digestive system. In the context of a Duodenal Ulcer, melena can occur as a result of bleeding in the duodenum or the upper part of the small intestine. This finding is significant as it indicates potential gastrointestinal bleeding, which is a common complication of duodenal ulcers. Nausea (Choice B) is a nonspecific symptom that may be present with various gastrointestinal conditions but is not specific to duodenal ulcers. Hernia (Choice C) involves the protrusion of an organ through the wall of the cavity that normally contains it and is not directly related to the symptoms of a duodenal ulcer. Hyperthermia (Choice D), which refers to an elevated body temperature, is not typically associated with duodenal ulcers unless there are severe complications present.

3. Which patient poses the least infection risk to an immunosuppressed patient who had a liver transplant?

• A. The patient with chronic pancreatitis
• B. The patient currently infected with a respiratory virus
• C. The patient with a healing leg wound
• D. The patient with a urinary tract infection

Correct answer: C

Rationale: The patient with a healing leg wound poses the least infection risk to an immunosuppressed patient who had a liver transplant. Chronic pancreatitis can lead to complications such as infections that can pose a risk to immunosuppressed individuals. Patients infected with respiratory viruses or urinary tract infections are actively infectious, which can put immunosuppressed patients at a higher risk of acquiring infections. Therefore, the patient with a healing leg wound is the least likely to pose an immediate infection risk.

4. Which of the following can cause coup-contrecoup injuries?

• A. Rotational forces
• B. Deformation forces
• C. Deceleration forces
• D. Acceleration forces

Correct answer: C

Rationale: Deceleration forces occur when the head is moving and abruptly comes to a stop, such as in a car crash. This sudden deceleration can cause the brain to hit against the skull, resulting in coup-contrecoup injuries. In a coup-contrecoup injury, the brain is damaged on opposite sides due to the initial impact and the rebound effect inside the skull. Rotational forces usually result in diffuse axonal injuries rather than coup-contrecoup injuries. Deformation forces can cause focal brain injuries but not coup-contrecoup injuries. Acceleration forces typically lead to diffuse brain injuries, not coup-contrecoup injuries. Therefore, the correct answer is deceleration forces.

5. A 34-year-old female has recently been diagnosed with an autoimmune disease. She has also recently discovered that she is pregnant. Which of the following is the only immunoglobulin that will provide protection to the fetus in the womb?

• A. IgA
• B. IgD
• C. IgE
• D. IgG

Correct answer: D

Rationale: IgG is the only immunoglobulin that can cross the placental barrier, providing passive immunity to the fetus. About 70-80% of the immunoglobulins in the blood are IgG. Specific IgG antibodies are generated after an initial exposure to an antigen, offering long-term protection against microorganisms. IgG antibodies are critical for protecting the fetus as they can be rapidly reproduced upon re-exposure to the same antigen. IgA is primarily found in mucosal areas, IgD is involved in antigen recognition, and IgE is associated with allergic reactions, but they do not provide the same level of protection to the fetus as IgG.

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