Med-Surg Sp2017 ARDS & Mechanical Ventilation questions and answers 2024

Med-Surg Sp2017 ARDS & Mechanical Ventilation Unresponsive arterial hypoxemia Explanation: Acute respiratory distress syndrome (ARDS) can be thought of as a spectrum of disease, from its milder form (acute lung injury) to its most severe form of fulminate, life-threatening ARDS. This clinical syndrome is characterized by a severe inflammatory process causing diffuse alveolar damage that results in sudden and progressive pulmonary edema, increasing bilateral infiltrates on chest x-ray, hypoxemia unresponsive to oxygen supplementation regardless of the amount of PEEP, and the absence of an elevated left atrial pressure ( Dushianthan, Grott, Postle, et al., 2011). - correct answer The nurse is caring for a patient with suspected ARDS with a pO2 of 53. The patient is placed on oxygen via face mask and the PO2 remains the same. What does the nurse recognize as a key characteristic of ARDS? Unresponsive arterial hypoxemia Diminished alveolar dilation Tachypnea Increased PaO2 Hypovolemia secondary to leakage of fluid into the interstitial spaces Explanation: Systemic hypotension may occur in ARDS as a result of hypovolemia secondary to leakage of fluid into the interstitial spaces and depressed cardiac output from high levels of PEEP therapy. Pulmonary hypertension, not pulmonary hypotension, sometimes is a complication of ARDS, but it is not the cause of the patient becoming hypotensive. - correct answer The nurse is caring for a patient in the ICU admitted with ARDS after exposure to toxic fumes from a hazardous spill at work. The patient has become hypotensive. What is the cause of this complication to the ARDS treatment? Pulmonary hypotension due to decreased cardiac output Severe and progressive pulmonary hypertension Hypovolemia secondary to leakage of fluid into the interstitial spaces Increased cardiac output from high levels of PEEP therapy Unresponsive arterial hypoxemia. Explanation: Clinically, the acute phase of ARDS is marked by a rapid onset of severe dyspnea that usually occurs 12 to 48 hours after the initiating event. A characteristic feature is arterial hypoxemia that does not respond to supplemental oxygen. - correct answer A nurse is aware that the diagnostic feature of ARDS is sudden: Unresponsive arterial hypoxemia. Diminished alveolar dilation. Tachypnea Increased PaO2 Administer oxygen by nasal cannula as ordered. Explanation: When a pulmonary embolus places a client at risk for oxygen deprivation, the body compensates by hyperventilating. This causes respiratory alkalosis, as reflected in the client's ABG values. However, the most significant ABG value is the PaO2 value of 60 mm Hg, which indicates hypoxemia. To manage hypoxemia, the nurse should increase oxygenation by administering oxygen via nasal cannula as ordered. Instructing the client to breathe into a paper bag would cause depressed oxygenation when the client reinhaled carbon dioxide. Auscultating breath sounds or encouraging deep breathing and coughing wouldn't improve oxygenation. - correct answer A client with a pulmonary embolus has the following arterial blood gas (ABG) values: pH, 7.49; partial pressure of arterial oxygen (PaO2), 60 mm Hg; partial pressure of arterial carbon dioxide (PaCO2), 30 mm Hg; bicarbonate (HCO3-) 25 mEq/L. What should the nurse do first?