A nurse is preparing a client for a magnetic resonance angiography (MRA). The client is allergic to iodinated contrast dye. Which of the following actions should the nurse plan to take?

Choice A reason: The Mantoux skin test, also known as the tuberculin skin test, measures the immune response to the tuberculin purified protein derivative (PPD) injected under the skin. An induration of less than 1 mm is not necessarily an indication of non-infectiousness; it may indicate a lack of infection or an inadequate immune response. This test does not reflect the current infectious status as it measures a delayed hypersensitivity reaction and can remain positive for life once someone has been exposed to TB or has received the BCG vaccine.

Choice B reason: Negative sputum cultures for acid-fast bacillus are a strong indication that the client is no longer infectious. Pulmonary tuberculosis is diagnosed and monitored through sputum cultures to detect the presence of Mycobacterium tuberculosis. A series of negative cultures typically indicates that the client is not excreting the bacteria and is, therefore, not contagious.

Choice C reason: While the cessation of coughing up blood-tinged sputum is a positive sign of clinical improvement, it does not conclusively indicate that the client is no longer infectious. The absence of blood in the sputum may simply mean that the damage to lung tissues is healing, but the client could still be harboring and potentially spreading TB bacteria.

Choice D reason: The Quantiferon-TB Gold test is a blood test that measures the immune system's response to TB bacteria. A positive result indicates TB infection, but it does not distinguish between latent infection and active disease, nor does it provide information on infectiousness. The parenthetical "negative" is confusing and should be clarified in the context of the test results.

Choice A reason: Serosanguineous drainage, which is a mixture of blood and a clear yellow liquid known as serum, is generally expected after surgery. While the amount of 150 mL may seem significant, it is not uncommon in the first hour postoperatively, especially after abdominal surgery. The nurse should continue to monitor the drainage and report if the volume increases significantly or if the drainage becomes bright red, indicating active bleeding.

Choice B reason: Greenish-yellow drainage is typically bile, which can be present in NG tube drainage after abdominal surgery. This type of drainage is not unusual and does not necessarily need to be reported unless accompanied by other concerning symptoms or changes in the patient's condition.

Choice C reason: 100 mL of red drainage is concerning and should be reported to the provider immediately. Red drainage suggests active bleeding, and in the context of the first postoperative hour, it could indicate a complication such as hemorrhage. Prompt assessment and intervention are required to address this potential emergency situation.

Choice D reason: Brown drainage may be old blood or could be related to the contents of the gastrointestinal tract. While 200 mL is a larger volume, brown drainage is not typically as concerning as bright red drainage. However, the nurse should monitor for changes in the color and consistency of the drainage, as well as the patient's vital signs and overall status.