Upon assessment, the nurse noted a temperature of 102.1, respirations of 30 breaths per minute, oxygen saturation of 90% on room air, decreased expansion and dullness over the right lung, and crackles heard on the right lower lobe. Which condition should the nurse suspect?

A. Atelectasis refers to the collapse or incomplete expansion of a lung or a portion of a lung. It can cause decreased breath sounds and dullness upon percussion, but it is less likely to present with a fever as high as 102.1°F. However, atelectasis can occur secondary to an obstructive pneumonia, making the distinction important in clinical settings. B. Pulmonary obstruction, such as from an obstruction of the airway or bronchus, might cause symptoms like difficulty breathing and decreased oxygen saturation. However, it would less commonly present with fever and localized crackles. C. Pneumonia often presents with symptoms such as fever (elevated temperature of 102.1°F), increased respiratory rate (30 breaths per minute), decreased oxygen saturation (90% on room air), and abnormal lung findings. The decreased expansion and dullness over the right lung, along with crackles (rales) heard in the right lower lobe, are indicative of fluid accumulation and inflammation in the lung, which are characteristic of pneumonia. D. Acute bronchitis involves inflammation of the bronchi and is often associated with a cough, sputum production, and sometimes fever. However, it typically presents with a productive cough and wheezing rather than localized dullness and crackles confined to one lobe.