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The nurse is caring for a client with emphysema who is mildly dyspneic after ambulation. Which instruction should the nurse provide to the client to improve gas exchange?

Draw air in through the nose and exhale slowly through pursed lips.

Lay down on each side with knees bent and breathe from the abdomen.

Increase breathing rate for a full 30 seconds.

Raise hands above the head to expand the diaphragm.

Answer and Explanation

The Correct Answer is A

Rationale for Choice A:

Pursed-lip breathing:

Creates back pressure in the airways, which helps to keep them open longer during exhalation.

Slows down the breathing rate, allowing for more complete exhalation and better emptying of the lungs. Prevents air trapping, which can worsen shortness of breath.

Promotes relaxation and reduces anxiety, which can also help to improve breathing.

Rationale for Choice B:

Side-lying position with knees bent:

May not be the most effective position for improving gas exchange in a client with emphysema. Could potentially restrict chest expansion and make breathing more difficult.

May not be comfortable for all clients.

Rationale for Choice C:

Increasing breathing rate:

Can lead to hyperventilation, which can worsen shortness of breath and anxiety. Can also cause fatigue and muscle exhaustion.

Rationale for Choice D:

Raising hands above the head:

Does not significantly expand the diaphragm or improve gas exchange. May actually make breathing more difficult for some clients.

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Correct Answer is A

Explanation

Choice A rationale:

Direct identification of the causative organism: A culture for sensitive organisms is the most direct and definitive way to identify the specific bacteria or other microorganisms that are causing the infection in the wound. This information is crucial for guiding the selection of the most appropriate antibiotic therapy.

Tailored antibiotic therapy: By knowing the exact organism responsible, healthcare providers can prescribe antibiotics that are specifically effective against that organism, ensuring optimal treatment and reducing the risk of antibiotic resistance.

Informed infection control measures: The results of the culture can also inform appropriate infection control measures to prevent the spread of the infection to other patients or healthcare workers.

Monitoring treatment effectiveness: Cultures can also be used to monitor the effectiveness of antibiotic therapy. If the culture results show that the bacteria are no longer present after a course of antibiotics, this indicates that the treatment has been successful.

Choice B rationale:

Non-specific marker of inflammation: C-reactive protein (CRP) is a non-specific marker of inflammation that can be elevated in various conditions, including infections, but also in non-infectious conditions such as autoimmune diseases and trauma.

Limited diagnostic value for wound infections: While an elevated CRP level may suggest the presence of an infection, it does not provide information about the specific causative organism, which is essential for guiding antibiotic therapy.

Supplementary role: CRP levels can be used in conjunction with other clinical findings and laboratory tests to assess the severity of an infection and monitor the response to treatment, but it should not be relied upon as a sole diagnostic tool for wound infections.

Choice C rationale:

Not directly indicative of wound infection: Blood pH level primarily reflects the acid-base balance of the body and is not directly indicative of a wound infection.

Alterations in other conditions: Blood pH can be altered in various conditions, including respiratory and metabolic disorders, and is not specific to wound infections.

Limited role in diagnosis: While significant alterations in blood pH may suggest a serious systemic infection, it does not provide information about the location or causative organism of the infection.

Choice D rationale:

Not directly related to wound infection: Serum blood glucose level is primarily used to monitor diabetes and is not directly related to wound infections.

Impaired wound healing in diabetes: While elevated blood glucose levels can impair wound healing and increase the risk of infections in diabetic patients, it is not a diagnostic test for wound infections in general.

Secondary consideration: Blood glucose levels may be considered as part of the overall assessment of a patient with a wound infection, particularly in those with diabetes, but it is not a primary diagnostic tool.

A. Carbon dioxide is converted in the kidneys for elimination. B. Hyperventilation is eliminating carbon dioxide rapidly. C. High levels of carbon dioxide have accumulated in the blood. D. Blood oxygen levels are stimulating the respiratory rate.

Correct Answer is C

Explanation

Choice A rationale:

Carbon dioxide is primarily eliminated through the lungs, not the kidneys. While the kidneys do play a role in acid-base balance, their primary mechanism for regulating pH is through the excretion or retention of bicarbonate ions (HCO3-), not carbon dioxide itself.

The kidneys' ability to compensate for respiratory acidosis is limited. In cases of severe respiratory acidosis, the kidneys may not be able to adequately compensate, leading to a further decrease in blood pH.

Choice B rationale:

Hyperventilation would actually decrease carbon dioxide levels in the blood, not increase them. Hyperventilation is a state of rapid, deep breathing that leads to increased exhalation of carbon dioxide. This can result in respiratory alkalosis, which is the opposite of respiratory acidosis.

Choice D rationale:

Low blood oxygen levels (hypoxia) can stimulate respiration, but this would not directly cause respiratory acidosis. In fact, hypoxia can sometimes lead to respiratory alkalosis due to hyperventilation.

Respiratory acidosis is primarily caused by impaired carbon dioxide elimination, not decreased oxygen levels.

Choice C rationale:

High levels of carbon dioxide in the blood (hypercapnia) are the hallmark feature of respiratory acidosis. This can occur due to a variety of factors that impair ventilation, such as:

Chronic obstructive pulmonary disease (COPD) Asthma

Pneumonia Sleep apnea

Neuromuscular disorders that affect breathing Drug overdose (e.g., opioids)

The accumulation of carbon dioxide in the blood leads to a decrease in blood pH, which can have a range of negative effects on the body's organ systems.

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The nurse is caring for a client with emphysema who is mildly dyspneic after ambulation. Which instruction should the nurse provide to the client to improve gas exchange?

Nursing Test Bank

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