A nurse is assessing a patient following a gunshot wound to the chest.
For which of the following findings should the nurse monitor to detect a pneumothorax?
Tachypnea.
Decreased use of accessory muscles.
Bradycardia.
Deviation of the trachea.
Correct Answer : A,D,E
Choice A rationale
Tachypnea, or an increased respiratory rate, is a compensatory mechanism initiated by the body in response to decreased oxygen availability. A pneumothorax causes lung collapse, reducing the surface area for gas exchange. This leads to hypoxemia and hypercapnia, which stimulate chemoreceptors in the brainstem to increase the respiratory rate and depth, in an attempt to improve ventilation and oxygenation. The normal respiratory rate for an adult is 12 to 20 breaths per minute.
Choice B rationale
A pneumothorax causes a collapsed lung, leading to significant respiratory distress. Patients will instinctively increase the use of accessory muscles, such as the scalenes and sternocleidomastoid, to help lift the rib cage and expand the chest cavity to increase the negative intrathoracic pressure needed for inspiration. Decreased use of these muscles would suggest an improvement in the patient's respiratory status, which is not expected with a pneumothorax.
Choice C rationale
A pneumothorax, especially a tension pneumothorax, can lead to a state of hypoxemia and hypercapnia, which triggers the sympathetic nervous system. The sympathetic response increases heart rate to improve cardiac output and oxygen delivery to the tissues. Therefore, tachycardia, not bradycardia, is a more common finding. Normal heart rate is 60 to 100 beats per minute.
Choice D rationale
Tracheal deviation is a critical late sign of a tension pneumothorax, a life-threatening condition where air accumulates in the pleural space and shifts the mediastinum away from the affected side. This shift can compress the great vessels and the unaffected lung, causing severe hemodynamic compromise and respiratory failure. The deviation is a result of the high pressure pushing the trachea to the side opposite the injury.
Choice E rationale
Pleuritic pain is a sharp, stabbing chest pain that is often described as being worse with inspiration or coughing. It is a classic symptom of pneumothorax, resulting from the irritation of the parietal pleura by the air that has escaped into the pleural space. The parietal pleura contains nerve endings, and its inflammation or irritation leads to this specific type of pain.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Increasing the suction pressure would not address the underlying issue of an air leak and could potentially worsen the patient's condition by causing further lung collapse or trauma. Continuous bubbling in the water-seal chamber indicates a persistent air leak from the pleural space, tubing, or at the insertion site, which needs to be identified and resolved. Adjusting the suction without finding the source of the leak is an inappropriate intervention.
Choice B rationale
Clamping the chest tube is a dangerous intervention as it can lead to a tension pneumothorax, a life-threatening condition. Clamping prevents air and fluid from exiting the pleural space, causing pressure to build up and compress the lung, heart, and great vessels. This action should only be performed for very brief periods under specific, controlled circumstances, such as when changing the drainage system.
Choice C rationale
Continuous bubbling in the water-seal chamber is not a normal finding. Normal bubbling in this chamber should only occur intermittently with the patient's respirations, indicating the resolution of the pneumothorax. Continuous bubbling signifies an ongoing air leak, which requires investigation. The nurse must not document this as a normal finding but rather as an abnormal assessment that warrants immediate action.
Choice D rationale
Continuous bubbling in the water-seal chamber indicates a persistent air leak in the pleural space or the drainage system. The nurse must systematically check all connections from the insertion site to the drainage unit to identify and correct the source of the leak. The goal is to ensure the integrity of the closed system to prevent atmospheric air from entering the chest and to facilitate lung re-expansion.
Correct Answer is C
Explanation
Choice A rationale
The assertion that persons between 30 and 40 years old are at high risk is incorrect. Shingles is caused by the reactivation of the varicella-zoster virus (VZV), which lies dormant in nerve cells after a person has had chickenpox. The risk of reactivation increases significantly with age, particularly in adults over 50. The immune system's ability to suppress the virus wanes with age, making older adults more susceptible.
Choice B rationale
This statement is inaccurate because the zoster vaccine (Zostavax) is not recommended for all ages. The CDC recommends Zostavax for immunocompetent adults 50 years and older. The newer Shingrix vaccine is now the preferred vaccine for adults aged 50 years and older. It is not approved for use in individuals under 18 years of age and is not a universal recommendation for all ages.
Choice C rationale
This statement is correct because individuals with compromised immune systems, such as those with leukemia, are at significantly higher risk for developing shingles. Leukemia impairs the function of the immune system's T-cells, which are critical for controlling the dormant varicella-zoster virus. The weakened immune response allows the virus to reactivate, leading to a shingles outbreak.
Choice D rationale
The claim that it is only possible to have one episode of the disease is false. While it is less common, recurrent episodes of shingles can occur. The varicella-zoster virus can reactivate multiple times throughout a person's life, especially in individuals with chronic illness or those who are immunocompromised. The risk of recurrence is higher in people with weakened immune systems.
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