The nurse is admitting a client with possible tuberculosis (TB). The client is placed in a private room with airborne precautions pending diagnostic test results.
Which diagnostic test should the nurse review to confirm the diagnosis of TB?

Choice B rationale:

Isoniazid's Mechanism of Action:

It targets and inhibits the synthesis of mycolic acids, which are essential components of the cell wall of Mycobacterium tuberculosis, the bacteria that cause tuberculosis.

By disrupting cell wall formation, isoniazid prevents bacterial growth and multiplication, leading to the suppression and eventual eradication of the infection.

Clinical Manifestations of Active TB:

Persistent cough, often productive of sputum (phlegm), is a hallmark symptom of TB. The sputum may contain blood or have a rusty-colored appearance.

Other common symptoms include fever, night sweats, fatigue, weight loss, and chest pain. How Isoniazid Reduces Cough and Sputum:

As isoniazid effectively kills the TB bacteria, the inflammatory process within the lungs subsides.

This leads to a gradual decrease in the production of sputum, which is a direct result of the inflammatory response. Consequently, the frequency and severity of coughing episodes also diminish.

Monitoring Treatment Response:

Regular sputum smears and cultures are essential to assess the response to treatment.

A positive sputum smear indicates the presence of live TB bacteria, while a positive culture confirms their growth in the laboratory.

A gradual decrease in the number of bacteria seen on sputum smears, followed by negative cultures, signals a favorable response to treatment.

Timeframe for Improvement:

It's important to note that clinical improvement, including a reduction in cough and sputum, may not be immediately evident. It typically takes several weeks of consistent isoniazid therapy to achieve noticeable results.

Therefore, adherence to the prescribed treatment regimen is crucial for successful TB eradication. Addressing Other Choices:

Choice A: Decreased appetite and weight loss are often associated with active TB due to systemic inflammation and nutritional deficiencies. While isoniazid treatment may indirectly improve appetite and weight gain over time, these are not primary indicators of its effectiveness in suppressing the TB infection itself.

Choice C: Vertigo and tinnitus are potential side effects of isoniazid, but they do not reflect its efficacy in treating TB.

Choice D: A positive sputum smear and culture would indicate ongoing TB infection and a lack of response to treatment.

B. Place patient on oxygen 2 to 4 liters and maintain oxygen saturation at or above 95%.

Rationale:

Hypoxemia: Patients who have undergone cholecystectomy are at risk for developing hypoxemia due to various factors, including:

Atelectasis: Collapsed lung tissue can impair gas exchange, leading to low oxygen levels in the blood.

Pneumonia: A potential post-operative complication that can cause inflammation and fluid buildup in the lungs, hindering oxygen uptake.

Pain: Post-surgical pain can inhibit deep breathing and coughing, which are essential for maintaining adequate lung function.

Oxygen Therapy: Supplementing oxygen helps to increase oxygen saturation and improve overall tissue oxygenation, reducing the strain on the heart and other organs.

Oxygen Saturation Goal: Maintaining oxygen saturation at or above 95% ensures that the patient's tissues are receiving sufficient oxygen to meet their metabolic needs.

C. Stat 2 views chest x-ray.

Rationale:

Chest X-ray: A valuable diagnostic tool that can visualize the lungs and surrounding structures, aiding in the assessment of: Atelectasis: Appears as areas of increased density on the x-ray, indicating collapsed lung tissue.

Pneumonia: May present as consolidation (solid white areas) or infiltrates (patchy areas of increased density) on the x-ray. Pleural effusion: Fluid accumulation in the pleural space, which can impair lung expansion and gas exchange.

Pneumothorax: Presence of air in the pleural space, which can cause lung collapse and respiratory distress.

Early Detection: Prompt identification of respiratory complications through chest x-ray allows for timely interventions and prevents further deterioration of the patient's condition.

E. Complete blood count (CBC), basic metabolic panel (BMP), and blood cultures.

Rationale:

CBC: Assesses for signs of infection or inflammation, including:

Elevated white blood cell count (leukocytosis) Increased neutrophils (neutrophilia)

Anemia (low red blood cell count)

BMP: Evaluates electrolyte and kidney function, which can be affected by infections and post-operative complications.

Blood Cultures: Determines the presence of bacteria in the bloodstream, allowing for identification of the causative organism and guiding appropriate antibiotic therapy.

F. Start the patient on antibiotic therapy.

Rationale:

Infection Risk: The patient's history of cholangitis and recent surgery increase the risk of infection. Prophylactic Antibiotics: Often administered after cholecystectomy to prevent post-operative infections.

Early Intervention: Prompt initiation of antibiotic therapy is crucial in managing infections and preventing serious complications such as sepsis.