A nurse is caring for an adolescent who states, "I failed my math exam because the teacher doesn't like athletes." The nurse should identify that the adolescent is using which of the following defense mechanisms?

Choice A rationale:

Facial erythema (redness of the face) is not a typical manifestation of pertussis (whooping cough) Pertussis primarily presents with a severe cough, often followed by a "whooping" sound during inhalation, and can cause complications like pneumonia and apnea. Facial erythema is not a characteristic sign of the disease.

Choice B rationale:

A beefy, red tongue is not a common manifestation of pertussis. This description is more suggestive of other conditions, such as vitamin deficiencies or certain infections. Pertussis primarily involves respiratory symptoms, and a red tongue is not a typical finding associated with the disease.

Choice C rationale:

Fever is a common manifestation of pertussis, and it is often one of the early symptoms. However, it is not the most specific sign of the disease, as many other infections can also cause fever. While fever can occur in pertussis, it is not the most distinctive feature of the condition.

Choice D rationale:

Koplik spots are not associated with pertussis but rather with measles (rubeola) Koplik spots are small white or grayish-blue spots with a red halo that appear on the mucous membranes inside the cheeks and are characteristic of measles. Pertussis is primarily known for its characteristic cough and paroxysms of coughing, not for Koplik spots.

Choice A rationale:

Temperature of 39°C (102.2°F) A temperature of 39°C (102.2°F) is elevated, but it is not directly related to a heart rate of 44/min. Elevated temperature can be caused by various factors, such as infection, and would not be an expected finding solely due to the heart rate.

Choice B rationale:

History of cigarette smoking. A history of cigarette smoking may be a risk factor for certain cardiovascular conditions, but it does not directly explain a heart rate of 44/min. The heart rate can be influenced by factors such as medications, cardiac conditions, and autonomic nervous system activity.

Choice D rationale:

Hypoglycemia. Hypoglycemia (low blood sugar) can cause various symptoms, including shakiness, confusion, and sweating, but it is not the primary cause of a heart rate of 44/min. Hypoglycemia is more likely to cause symptoms related to altered mental status and autonomic nervous system activation.

Choice C rationale:

Patient reports they feel that they are going to pass out. A heart rate of 44/min is significantly lower than the normal range for adults, which is typically between 60-100 beats per minute. Such a low heart rate, known as bradycardia, can lead to decreased blood flow to vital organs, including the brain. Feeling like they are going to pass out is a concerning symptom associated with bradycardia because it suggests inadequate cardiac output and perfusion. This finding should prompt immediate assessment and intervention to address the underlying cause of the slow heart rate.