Nokea
In which way is inspiratory capacity defined?
- A. The amount of air in the lung after a maximal inhalation
- B. The amount of air moved with each normal inhalation and expiration
- C. The amount of air that can be inhaled in one breath from the resting expiratory level
- D. The amount of air that can be forcefully exhaled after maximum inhalation
Correct Answer: C
Rationale: Inspiratory capacity is the volume of air that can be inhaled in one breath from the resting expiratory level.
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Which important precaution should the nurse include when instructing a patient with emphysema on the use of home oxygen?
- A. Use oxygen only when extremely short of breath.
- B. Keep the home oxygen regulator set on 6 L.
- C. Use home oxygen at night while sleeping.
- D. Limit to 1 to 2 L oxygen flow.
Correct Answer: D
Rationale: Low-flow oxygen therapy is required for patients with COPD, because higher oxygen concentrations depress the body's own respiratory regulatory centers and can cause respiratory failure.
The nurse recognizes that the reading in an arterial gas report indicates the amount of oxygen dissolved in the plasma.
Correct Answer: PaO2
Rationale: The PaO2 reading indicates the amount of oxygen dissolved in the plasma.
A patient, age 22, is admitted with acute asthma. The patient shows a pulse oximetry level of SaO2 of 82%. How should the nurse interpret this?
- A. Only 82% of the red blood cells are able to use oxygen.
- B. There is only 82% of oxygen bound to the hemoglobin compared with the amount available.
- C. Eighteen percent of oxygen is not dissolved in the blood.
- D. The muscular respiratory effort is only 18% effective.
Correct Answer: B
Rationale: An SaO2 of 82% indicates that only 82% of the available oxygen is bound to the hemoglobin.
The nurse explains that the opening between the vocal cords is the ___.
Correct Answer: glottis
Rationale: The glottis is the opening between the vocal cords.
The older adult patient with long-term emphysema reports experiencing a sharp pleuritic pain after a severe period of coughing. The patient's heart rate and respiratory rate have increased. Auscultation reveals no breath sounds on the left side. These are signs and symptoms of which condition?
- A. Pulmonary embolus
- B. Spontaneous pneumothorax
- C. Early signs of unilateral pneumonia
- D. An attack of asthma
Correct Answer: B
Rationale: Spontaneous pneumothorax can be caused by a ruptured bleb in a patient with long-term emphysema. The disorder causes chest pain, dyspnea, and anxiety associated with air hunger.