A nurse is preparing to obtain a guaiac smear sample from a client for fecal occult blood testing. 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: Changing the ostomy pouch daily is not typically necessary. Most pouches can be worn comfortably for several days before needing to be changed. Frequent changes are not only unnecessary but can also irritate the skin around the stoma.

Choice B reason: Emptying the ostomy pouch when it is 2/3 full is recommended to prevent leaks and overfilling, which can lead to discomfort and potential skin irritation. It is important to monitor the fullness of the pouch and empty it regularly to maintain hygiene and comfort.

Choice C reason: Trimming the opening of the ostomy seal to be 1/2 inch wider than the stoma is incorrect. The opening should be cut to match the size of the stoma to ensure a snug fit that prevents leakage and protects the skin around the stoma.

Choice D reason: Applying lotion to the peristomal skin when changing the ostomy pouch is not advised. Lotions or creams can interfere with the adhesive of the ostomy appliance and should be avoided. The peristomal skin should be clean and dry to ensure proper adhesion of the ostomy appliance.