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What is a surgical procedure to remove one of the lobes of the lungs, often performed to treat lung cancer?
- A. Lobectomy
- B. Pneumonectomy
- C. Thoracotomy
- D. Tracheostomy
Correct Answer: A
Rationale: The correct answer is A: Lobectomy. A lobectomy involves the surgical removal of one of the lobes of the lungs, often performed to treat lung cancer localized in a specific lobe. This procedure allows for targeted removal of cancerous tissue while preserving the remaining healthy lung tissue.
Explanation for other choices:
B: Pneumonectomy - This involves the complete removal of an entire lung and is not specific to removing a lobe.
C: Thoracotomy - This is a surgical incision into the chest, not specific to removing a lobe of the lung.
D: Tracheostomy - This is a surgical procedure to create an opening in the neck to insert a tube into the trachea for breathing and is not related to removing a lobe of the lung.
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The nurse is administering a calcium channel blocker. What is the primary effect of this medication on the cardiovascular system?
- A. Decreases heart rate
- B. Increases heart rate
- C. Increases blood pressure
- D. Decreases blood pressure
Correct Answer: D
Rationale: The correct answer is D: Decreases blood pressure. Calcium channel blockers inhibit the influx of calcium into cardiac and smooth muscle cells, leading to vasodilation and decreased peripheral resistance, ultimately reducing blood pressure. This effect is beneficial in conditions such as hypertension and angina. The other choices are incorrect because calcium channel blockers typically do not directly affect heart rate or increase blood pressure.
Which condition is caused by a bacterium that primarily affects the lungs but can spread to other parts of the body?
- A. Tuberculosis
- B. Pneumonia
- C. Legionnaires' disease
- D. Histoplasmosis
Correct Answer: A
Rationale: The correct answer is A: Tuberculosis. Tuberculosis is caused by the bacterium Mycobacterium tuberculosis, which primarily affects the lungs but can spread to other parts of the body through the bloodstream or lymphatic system. This bacterium specifically targets the lungs, leading to symptoms such as coughing, chest pain, and difficulty breathing. In contrast, Pneumonia (B) is commonly caused by viruses, bacteria, or fungi affecting the lungs but doesn't specifically spread to other body parts like TB. Legionnaires' disease (C) is caused by Legionella bacteria and primarily affects the lungs, but it does not have the same capability to spread to other body parts like TB. Histoplasmosis (D) is a fungal infection that primarily affects the lungs but does not spread to other parts of the body in the same way as tuberculosis.
Which surgical procedure involves removing a portion of the lung?
- A. Lobectomy
- B. Pneumonectomy
- C. Tracheostomy
- D. Bronchoscopy
Correct Answer: A
Rationale: The correct answer is A: Lobectomy. A lobectomy involves the removal of a lobe of the lung. This procedure is commonly done to treat lung cancer or other conditions affecting a specific lobe. Pneumonectomy (B) involves the removal of an entire lung, not just a portion. Tracheostomy (C) is the surgical creation of an opening in the windpipe to help with breathing, not a lung removal procedure. Bronchoscopy (D) is a diagnostic procedure to visualize the airways using a flexible tube with a camera, not a lung removal surgery. Therefore, A is the correct choice for removing a portion of the lung.
What is a severe allergic reaction that can cause difficulty breathing and shock?
- A. Anaphylaxis
- B. Asthma attack
- C. Bronchospasm
- D. Hypersensitivity
Correct Answer: A
Rationale: The correct answer is A: Anaphylaxis. Anaphylaxis is a severe allergic reaction that can cause difficulty breathing and shock due to the body's extreme immune response to an allergen. It involves a systemic release of histamine and other chemicals leading to symptoms like swelling, hives, and a drop in blood pressure. Asthma attack (B) is a respiratory condition characterized by airway inflammation and narrowing, but it is not necessarily related to an allergic reaction. Bronchospasm (C) refers to the sudden constriction of the muscles lining the airways, which can occur in asthma or other respiratory conditions, but it is not specific to an allergic reaction. Hypersensitivity (D) is a general term for exaggerated immune responses, including allergies, but it does not specifically describe the severe and potentially life-threatening nature of anaphylaxis.
What test involves the nurse instructing the client to avoid eating or drinking until sensation and the gag reflex return, which may take 1 hour or longer?
- A. Transesophageal echocardiography (TEE)
- B. Magnetic resonance imaging (MRI)
- C. Echocardiography
- D. Cardiac catheterization
Correct Answer: A
Rationale: TEE requires the client to fast until the gag reflex returns to prevent aspiration.