A nurse is caring for a patient with pneumonia who has developed tachypnea, fever, and productive cough with purulent sputum.

The patient's oxygen saturation is 88 The healthcare provider orders supplemental oxygen and antibiotic therapy.

Which action should the nurse take first when caring for this patient?

Choice A rationale

Weight gain is not associated with pulmonary tuberculosis because the infection triggers a systemic inflammatory response and a hypermetabolic state. The body consumes energy stores to fight the Mycobacterium tuberculosis pathogen, often leading to significant, unintended weight loss rather than gain. Additionally, cytokines like tumor necrosis factor-alpha contribute to anorexia and cachexia. In clinical practice, documenting a patient's weight is crucial as progressive loss often indicates disease activity or poor response to treatment.

Choice B rationale

A low-grade afternoon fever is a classic systemic manifestation of tuberculosis. This occurs because the immune system releases pyrogens in response to the replicating bacteria, which resets the hypothalamic thermostat. This fever typically peaks in the late afternoon or evening and may be accompanied by malaise. While high fevers can occur in acute stages, the persistent low-grade nature is more characteristic of the chronic inflammatory process seen in pulmonary tuberculosis infections during the active phase.

Choice C rationale

Blood in the sputum, or hemoptysis, occurs when the tuberculous process causes necrosis and cavitation within the lung parenchyma. As these cavities form, they can erode into small pulmonary blood vessels, leading to the expectoration of blood-streaked or frankly bloody mucus. This is a significant clinical indicator of tissue destruction and active disease. Nurses must monitor the amount and frequency of hemoptysis to assess the risk of airway obstruction or significant hemorrhage in these patients.

Choice D rationale

Night sweats are a hallmark symptom of tuberculosis resulting from the body's attempt to regulate temperature after a daytime low-grade fever. As the fever breaks during sleep, the diaphoresis becomes profuse, often soaking the client's clothes or bed linens. This symptom is linked to the circadian rhythm of cytokine release and the metabolic demands of the chronic infection. It is one of the most common subjective complaints that lead individuals to seek medical evaluation for tuberculosis.

Choice E rationale

Flushed cheeks are not a standard diagnostic finding for pulmonary tuberculosis. While a fever might cause transient redness, tuberculosis is more frequently associated with a pale or sallow complexion due to chronic anemia and general physical wasting, historically referred to as consumption. Flushed cheeks are more indicative of conditions causing acute high fever or mitral stenosis. In tuberculosis management, the focus remains on respiratory symptoms and systemic signs like weight loss and persistent cough rather than facial flushing.

Choice A rationale

Monitoring skin color is a standard assessment for many medications but is not the primary focus for ethambutol. While liver toxicity can cause jaundice, which changes skin color, this is more commonly associated with other antituberculosis drugs like isoniazid or rifampin. Normal skin assessment involves checking for cyanosis or pallor, but ethambutol specifically lacks the high-frequency dermatologic side effects that would necessitate focused, prioritized skin monitoring over other specialized sensory tests.

Choice B rationale

Urine output monitoring is essential for evaluating renal function, especially since many drugs are cleared by the kidneys. However, ethambutol is not primarily known for causing acute renal failure or significant changes in urine volume. The normal range for adult urine output is 0.5 to 1.5 mL per kg per hour. While dosage adjustments are needed for patients with existing renal impairment, the drug itself does not typically require routine urine volume tracking for toxicity.

Choice C rationale

Cardiac rhythm monitoring is not a standard requirement for patients taking ethambutol. Unlike some antibiotics or specialized cardiac medications that can prolong the QT interval or cause arrhythmias, ethambutol lacks significant cardiotoxic properties. Normal sinus rhythm is the expected finding in healthy individuals. The primary physiological concerns with this medication remain focused on the central nervous system and sensory organs rather than the electrical conduction system of the heart or muscular contractility.

Choice D rationale

Ethambutol is known to cause optic neuritis, which is a common and serious side effect leading to decreased visual acuity and red-green color blindness. This occurs due to the inflammatory response in the optic nerve fibers. Regular monitoring of vision is crucial to detect early signs of toxicity, which can be reversible if the drug is stopped promptly. Assessing the ability to see clearly and distinguish colors ensures the patient does not suffer permanent vision loss.