A nurse is providing discharge teaching to a client who has chronic urinary tract infections.
The client has a prescription for ciprofloxacin 250 mg PO twice daily. Which of the following instructions should the nurse include in the teaching?

Sinus bradycardia is a type of cardiac arrhythmia characterized by a heart rate lower than 60 beats per minute in adults, or below the normal range for age in children. It can be diagnosed by an electrocardiogram (ECG) that shows regular P waves with constant morphology preceding every QRS complex, and positive in lead II.

An acute asthma attack is a sudden worsening of asthma symptoms, such as coughing, wheezing, tightness in the chest, and difficulty breathing. These symptoms happen because the airways in the lungs become narrow, irritated, swollen, and produce excess mucus.

An asthma attack can be triggered by various factors, such as allergic reactions, respiratory infections, tobacco smoke, cold air, and exercise. These triggers cause the immune system to react and release chemicals that cause inflammation and constriction of the airways.

Based on this information, the best answer to the question is a. Inability to exhale retained carbon dioxide. This is because during an asthma attack, the narrowed airways make it harder to exhale the air from the lungs, which leads to a buildup of carbon dioxide in the blood. This can worsen the symptoms and cause acidosis, a condition where the blood becomes too acidic.

The other options are not correct because:

b. Acute loss of alveolar elasticity is not a cause of asthma attacks, but a consequence of chronic obstructive pulmonary disease (COPD), a different lung condition that involves damage to the alveoli, the tiny air sacs in the lungs.
c. Decreased responsiveness of airways to allergens is not a cause of asthma attacks, but a goal of asthma treatment. Asthma medications aim to reduce the sensitivity and inflammation of the airways to prevent or reduce the frequency and severity of asthma attacks.
d. Suppressed bronchiolar inflammatory response is not a cause of asthma attacks, but a potential side effect of some asthma medications, such as corticosteroids. These drugs can suppress the immune system and increase the risk of infections in the airways.