Which of the following could the nurse expect to observe in an older adult client who has a pneumothorax?
Higher oxygen saturations of 98% to 99%
Lower oxygen saturations of 93% to 94%
Lower energy expenditure
Increased lung capacity
The Correct Answer is B
Choice A Reason:
Higher oxygen saturations of 98% to 99% is inappropriate. A pneumothorax involves the presence of air in the pleural space, which can compromise lung function and gas exchange. This compromised lung function typically leads to decreased oxygenation of the blood, resulting in lower oxygen saturations rather than higher saturations.
Choice B Reason:
Lower oxygen saturations of 93% to 94% is appropriate. A pneumothorax disrupts the normal exchange of oxygen and carbon dioxide in the lungs due to partial or complete lung collapse. As a result, the affected lung is unable to adequately oxygenate the blood, leading to lower oxygen saturations, which are indicative of hypoxemia.
Choice C Reason:
Lower energy expenditure is inappropriate. Energy expenditure is not typically affected by a pneumothorax. While the discomfort and respiratory distress associated with a pneumothorax may cause the individual to limit physical activity, there is no direct impact on overall energy expenditure.
Choice D Reason:
Increased lung capacity is inappropriate. A pneumothorax results in partial or complete collapse of the affected lung, reducing lung capacity rather than increasing it. The presence of air in the pleural space creates positive pressure, which can compress the lung and decrease its ability to expand fully during inhalation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A Reason:
Manual wheelchair is inappropriate. A manual wheelchair requires the use of the client's upper extremities to propel the wheelchair forward by pushing on the wheels. With a spinal cord injury at the fourth cervical level, the client may have limited or no function in their upper extremities, making it difficult to self-propel a manual wheelchair.
Choice B Reason:
Sip-and-puff device is appropriate. A sip-and-puff device allows individuals with limited or no hand function to control a powered wheelchair using their breath. This device enables the client to navigate the wheelchair by inhaling or exhaling into a straw-like device, which activates controls to move the wheelchair forward, backward, and turn.
Choice C Reason:
Drive-adapted wheelchair is inappropriate. A drive-adapted wheelchair is a powered wheelchair that can be modified with adaptive controls to accommodate individuals with limited hand function or mobility. These wheelchairs may include joystick controls, head arrays, chin controls, or other adaptive devices that allow the client to operate the wheelchair independently despite limited hand function.
Choice D Reason:
Ultra-light wheelchairs is inappropriate. Ultra-light wheelchairs are manual wheelchairs that are lightweight and often customized to fit the client's specific needs and preferences. While ultra-light wheelchairs may offer advantages in terms of maneuverability and ease of transportation, they still require sufficient upper extremity function to self-propel the wheelchair.
Correct Answer is D
Explanation
Correct answer: D
Choice A Reason:
Decreased pulmonary vascular resistance is incorrect. Inflammatory mediators released in response to a pulmonary embolism can lead to vasoconstriction and increased pulmonary vascular resistance. This is part of the body's response to redirect blood flow away from the affected area of the lung and maintain adequate perfusion to other areas.
Choice B Reason:
Hypercapnia is incorrect. Hypercapnia refers to elevated levels of carbon dioxide (CO2) in the blood.Hypocapnia usually is present with embolism; hypercapnia, on the other hand, is rare.
Choice C Reason:
Hypoventilation is incorrect. Hypoventilation occurs when there is inadequate ventilation of the lungs relative to metabolic demands. In the context of a pulmonary embolism, hypoventilation can occur due to factors such as pain, respiratory muscle fatigue, or impaired gas exchange, all of which can be influenced by the release of inflammatory mediators.
Choice D Reason:
Respiratory alkalosis is correct.In response to the blockage and the resulting inflammation, the body often increases the respiratory rate as a compensatory mechanism to maintain adequate oxygen levels and remove carbon dioxide.Due to the increased breathing rate, there is excessive exhalation of carbon dioxide, leading to a decrease in the partial pressure of CO2 in the blood. This results in an increase in blood pH, causing respiratory alkalosis.
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