A nurse is caring for a client following a cardiac catheterization who has hives and urticaria following administration of IV contrast dye. Which of the following medications should the nurse plan to administer?

A Sputum cultures for AFB are used to detect the presence of Mycobacterium tuberculosis, the bacteria causing TB. A negative result means that the sputum samples tested do not contain viable TB bacteria that can be transmitted to others. It indicates that the client's TB treatment has been effective in reducing the bacterial load to non-infectious levels.

B. The Quantiferon-TB Gold test is a blood test used to detect TB infection based on the immune response to TB antigens. A positive result indicates TB infection but does not differentiate between latent TB infection (not infectious) and active TB disease (potentially infectious).

C. The Mantoux tuberculin skin test (TST) is another test used to detect TB infection based on a delayed- type hypersensitivity reaction to TB antigens. An induration of less than 1 mm is considered negative and suggests that the client does not have a significant immune response to TB antigens, which could mean they are not infected with TB or the infection is not significant. This finding does not provide information on the client's infectiousness.

D. This indicates improvement in the client's symptoms, as coughing up blood-tinged sputum (hemoptysis) is a common symptom of active pulmonary TB. While improvement in symptoms is an important aspect of TB treatment, it does not directly indicate whether the client is no longer infectious. Infectiousness is primarily determined by microbiological tests such as sputum cultures for AFB.

A A change in level of consciousness (LOC), such as confusion, lethargy, or loss of consciousness, can indicate worsening neurological status. It reflects impaired brain function due to increased pressure on brain tissues.

B. Pupillary changes, such as dilation or asymmetry, can occur due to pressure on the oculomotor nerve (cranial nerve III). Pupillary dilation can be a sign of increased ICP but typically occurs after other neurological changes.

C. Decorticate posturing indicates significant neurological impairment but typically appears after alterations in consciousness.

D. Cheyne-Stokes respirations indicate brainstem involvement and impaired respiratory control but are generally seen later in the progression of neurological deterioration.