Acute Respiratory Failure Overview

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Questions and Answers

Which of the following measures are important to promote energy conservation during respiratory therapy?

  • Encouraging continuous coughing sessions
  • Allowing rest periods between demanding activities (correct)
  • Increasing the frequency of chest physiotherapy
  • Minimizing patient rest to promote activity

What should the composition of a patient's non-protein caloric intake primarily consist of to prevent excess carbon dioxide production?

  • 50% fats and 50% carbohydrates (correct)
  • 30% fats and 70% carbohydrates
  • 50% carbohydrates and 50% fats
  • 80% proteins and 20% fats

Why is pain management crucial in respiratory therapy?

  • To facilitate increased coughing strength
  • To prevent hypoventilation and atelectasis (correct)
  • To ensure the patient remains awake during the treatment
  • To enhance the patient's appetite

What is the role of sedatives in respiratory therapy?

<p>To decrease ventilator asynchrony (A)</p> Signup and view all the answers

Which type of medications is used to treat bronchospasm in respiratory therapy?

<p>Bronchodilators (D)</p> Signup and view all the answers

Which of the following is NOT a pulmonary symptom commonly associated with respiratory assessment?

<p>Fluid retention (A)</p> Signup and view all the answers

What risk factor related to the respiratory system involves the type and duration of use?

<p>Smoking history (A)</p> Signup and view all the answers

In the context of acute respiratory failure, which condition is classified under disorders of the central nervous system?

<p>Cerebrovascular accident (D)</p> Signup and view all the answers

Which symptom is a primary indicator of hypercapnia?

<p>Headache (B)</p> Signup and view all the answers

Which of the following would be considered an extrapulmonary symptom related to respiratory issues?

<p>Night sweats (B)</p> Signup and view all the answers

What is the classic symptom of hypoxemia?

<p>Confusion (A)</p> Signup and view all the answers

Which condition is NOT typically associated with diseases of the pleura and chest wall?

<p>Muscular dystrophy (D)</p> Signup and view all the answers

Which of the following is a potential physical finding associated with hypoxemia?

<p>Tachycardia (B)</p> Signup and view all the answers

What defines acute hypoxemic respiratory failure (Type I)?

<p>Increased alveolar ventilation resulting in low PaCO2. (A), Inability to achieve adequate oxygenation with low PaO2. (D)</p> Signup and view all the answers

Which of the following situations is likely to result in acute hypercapnic respiratory failure (Type II)?

<p>Inadequate alveolar ventilation. (C)</p> Signup and view all the answers

What is a hallmark symptom of acute respiratory failure?

<p>Decreased arterial oxygen tension. (C)</p> Signup and view all the answers

Which condition is most likely to result in combined hypoxemic and hypercapnic respiratory failure?

<p>Asthma exacerbation. (B)</p> Signup and view all the answers

What primarily causes hypoxemia in acute respiratory failure?

<p>Ventilation/perfusion mismatching. (A)</p> Signup and view all the answers

In Type I respiratory failure, what is significant about arterial carbon dioxide tension (PaCO2)?

<p>PaCO2 is generally low. (D)</p> Signup and view all the answers

Which condition is most frequently associated with sudden deterioration in pulmonary gas exchange?

<p>Acute respiratory distress syndrome (ARDS). (C)</p> Signup and view all the answers

What is the arterial pH level typically associated with acute respiratory failure?

<p>Less than 7.35. (B)</p> Signup and view all the answers

What are the potential consequences of uncorrected carbon dioxide narcosis?

<p>Diminished alertness, disorientation, and unconsciousness (C)</p> Signup and view all the answers

Which diagnostic study is essential to confirm the diagnosis of acute respiratory failure?

<p>Arterial blood gas (ABG) analysis (D)</p> Signup and view all the answers

What is a critical step in the management of acute respiratory failure if there is inadequate alveolar ventilation?

<p>Implementing endotracheal intubation and mechanical ventilation (C)</p> Signup and view all the answers

Which of the following is a nursing diagnosis associated with impaired gas exchange?

<p>Impaired Gas Exchange related to ventilation/perfusion mismatching (C)</p> Signup and view all the answers

What nursing intervention should be prioritized for a patient with acute respiratory failure?

<p>Implementing continuous pulse oximetry monitoring (A)</p> Signup and view all the answers

Which of the following diagnostic tests is NOT typically required to determine the etiology of acute hypoxemic respiratory failure?

<p>Magnetic Resonance Imaging (MRI) (D)</p> Signup and view all the answers

What complication can arise from extended hypoxemia?

<p>Cardiac dysrhythmias (C)</p> Signup and view all the answers

Which finding might be observed upon examination of a patient with severe respiratory failure?

<p>Use of accessory muscles of respiration (B)</p> Signup and view all the answers

What is the primary condition associated with hypoxemia due to alveolar hypoventilation?

<p>Hypercapnia (D)</p> Signup and view all the answers

Which of the following best describes V/Q mismatching?

<p>Excessive perfusion without sufficient ventilation (D)</p> Signup and view all the answers

What is the most common cause of hypoxemia related to V/Q mismatching?

<p>Partially collapsed or fluid-filled alveoli (B)</p> Signup and view all the answers

What characterizes intrapulmonary shunting?

<p>Deoxygenated blood mixes with oxygenated blood (D)</p> Signup and view all the answers

At what shunt fraction is hypercapnia typically expected to develop?

<p>Above 60% (C)</p> Signup and view all the answers

Which condition represents a form of diffusion impairment?

<p>Pulmonary fibrosis (D)</p> Signup and view all the answers

What is the normal range of the ventilation/perfusion (V/Q) ratio?

<p>0.8 to 4/5 (A)</p> Signup and view all the answers

Which treatment is commonly associated with correcting hypoxemia due to intrapulmonary shunting?

<p>Pressure peep (C)</p> Signup and view all the answers

What is the optimal positioning for a patient with unilateral lung disease to enhance perfusion?

<p>Position with the good lung down (B)</p> Signup and view all the answers

What should be done for supplemental oxygen therapy if it is not sufficient to maintain adequate oxygenation?

<p>Initiate continuous positive airway pressure (CPAP) (C)</p> Signup and view all the answers

Which position is recommended to prevent hypoventilation and promote maximal inhalation?

<p>Semi-Fowler's position (A)</p> Signup and view all the answers

What is the purpose of administering humidification to airways in respiratory care?

<p>To thin secretions and facilitate airway clearance (C)</p> Signup and view all the answers

When is chest physiotherapy particularly indicated for a patient?

<p>When there are large amounts of retained secretions (B)</p> Signup and view all the answers

In managing mechanical ventilation, what is one crucial step to consider according to patient needs?

<p>Initiating mechanical ventilation as indicated based on patient assessment (C)</p> Signup and view all the answers

How often should the patient's position be changed to enhance oxygenation?

<p>Every 2 hours, favoring oxygenation improvements (D)</p> Signup and view all the answers

What is a critical component of deep-breathing exercises in respiratory care?

<p>Promoting diaphragmatic descent and lung expansion (A)</p> Signup and view all the answers

Flashcards

Acute Respiratory Failure (ARF)

A sudden, life-threatening lung problem causing low oxygen and high carbon dioxide in the blood.

Hypoxemia

Low blood oxygen levels.

Hypercapnia

High blood carbon dioxide levels.

Type I Respiratory Failure

ARF type focused on oxygen delivery problems.

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Type II Respiratory Failure

ARF type with problems removing carbon dioxide.

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Alveolar Hypoventilation

Insufficient amount of oxygen in the lungs.

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Ventilation/Perfusion (V/Q) Mismatching

Problem with the flow of blood and air in the lungs.

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Intrapulmonary Shunting

Blood bypassing parts of the lungs that are not able to exchange oxygen and carbon dioxide efficiently.

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Hypoxemia from Alveolar Hypoventilation

Low blood oxygen levels caused by insufficient breathing, often due to extrapulmonary problems.

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V/Q Mismatch

Uneven distribution of ventilation and blood flow in the lungs, leading to hypoxemia.

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Intrapulmonary Shunting

Blood reaches the heart without participating in gas exchange, lowering blood oxygen levels.

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Diffusion Impairment

Reduced gas exchange across the thin membrane separating alveoli and capillaries, causing hypoxemia.

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Large Airway Obstruction

A blockage in a large airway, hindering airflow and potentially causing respiratory failure.

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Bronchial Diseases

Conditions affecting the airways that restrict airflow and contribute to respiratory distress.

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Parenchymal Diseases

Lung tissue (parenchyma) damage leading to reduced gas exchange and respiratory failure.

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Acute Lung Injury

Sudden damage to the lung tissue, often leading to fluid buildup and reduced oxygen intake.

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Cardiac Pulmonary Edema

Fluid buildup in the lungs due to heart problems.

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Pneumothorax

Air in the pleural space (around the lung), causing lung collapse.

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Pulmonary Symptoms

Respiratory issues like coughing, wheezing, and shortness of breath.

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Hypoxemia

Low levels of oxygen in the blood.

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Hypercapnia

High levels of carbon dioxide in the blood.

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Dyspnea

Shortness of breath.

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Risk Factors (Respiratory)

Factors increasing the chance of respiratory problems.

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Extrapulmonary symptoms

Symptoms outside of the lungs. A symptom located outside of the lungs.

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Acute Respiratory Failure (ARF) Diagnosis

Diagnosing ARF requires blood gas analysis (ABG) to measure PaO2, PaCO2, and blood pH.

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ARF Management

ARF treatment focuses on fixing gas exchange problems and the underlying cause. This may involve intubation and mechanical ventilation for severe cases.

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Nursing Interventions (Monitoring)

Continuous pulse oximetry or SpO2 monitoring every hour is crucial to track oxygen levels in ARF patients.

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Uncorrected CO2 Narcosis

Uncorrected carbon dioxide in the blood leads to decreased awareness, disorientation, increased brain pressure, and loss of consciousness.

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ARF Diagnostic Tests

Multiple tests, like blood work (electrolytes, CBC), urine analysis, imaging (x-ray, CT), and pulmonary function tests, help determine the cause of ARF.

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Impaired Gas Exchange (ARF)

Impaired gas exchange in ARF is due to problems with oxygen intake and carbon dioxide removal.

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Ineffective Airways Clearance

This ARF diagnosis applies when excessive mucus or thick mucus prevents proper airway clearance, hindering breathing.

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Ineffective Breathing Pattern (ARF)

This ARF nursing diagnosis applies to patients experiencing problems with breathing patterns due to muscle weakness or nerve issues.

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Energy Conservation Strategies

Allowing rest periods between demanding activities like coughing, physiotherapy, and suctioning to prevent patient fatigue.

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Fat-Rich Diet

Prioritizing fats over carbohydrates for patients to reduce carbon dioxide production.

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Pain Management

Using analgesics to relieve pain to prevent hypoventilation and atelectasis which are serious problems.

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Communication Assessment

Evaluating a patient's ability to communicate, including understanding, speaking, reading, and writing skills.

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Respiratory Drug Administration

Collaboration with physicians to administer drugs like sedatives, neuromuscular blockers, bronchodilators, mucolytics/expectorants, antibiotics, and reversal agents to manage respiratory conditions.

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Assess sputum

Evaluate the color, consistency, and amount of sputum (phlegm) to assess potential respiratory infections or other issues.

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Pneumonia Assessment

Identifying clinical signs and symptoms associated with lung infection (pneumonia).

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Patient Positioning

Adjusting patient posture to support effective breathing and gas exchange.

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Supplemental Oxygen Delivery

Providing extra oxygen to improve blood oxygen levels.

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High-Fowler's Position

Patient positioned upright to optimize breathing.

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Chest Physiotherapy

Techniques to help clear lung secretions.

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Prevent Hypoventilation

Supporting the patient to ensure adequate breathing.

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Mechanical Ventilation

Using a machine to assist with breathing in compromised situations.

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Study Notes

Acute Respiratory Failure

  • Acute respiratory failure (ARF) is a sudden and life-threatening decline in lung function, characterized by carbon dioxide retention and insufficient oxygenation.
  • ARF is a significant cause of morbidity and mortality in intensive care units.
  • ARF is defined as a drop in arterial oxygen tension (PaO2) below 50 mm Hg, or a rise in arterial carbon dioxide tension (PaCO2), or a decrease in arterial pH below 7.35.
  • Ventilation-perfusion (V/Q) mismatching, intrapulmonary shunting, and diffusion impairment are key factors in ARF.

Classification of Acute Respiratory Failure

  • Type I (hypoxemic): Primarily a problem with oxygenation. Low PaO2, normal or low PaCO2. Associated with conditions that impair oxygen transport (like pulmonary parenchymal disease)
  • Type II (hypercapnic): Primarily a problem with ventilation. High PaCO2, normal or low PaO2. Causes include alveolar hypoventilation.
  • Combined (Type I and Type II): Involves both problems with ventilation (hypercapnia) and oxygenation (hypoxemia)

Causes of Acute Respiratory Failure (categorized)

  • Intrinsic Lung/Airway Diseases: Large airway obstruction, bronchial diseases, parenchymal diseases, acute lung injury, and cardiovascular disease.
  • Extra-pulmonary Disorders: Pleural diseases, chest wall disorders, neuromuscular junction disorders, peripheral nerve/spinal cord, central nervous system issues.

Symptoms of Acute Respiratory Failure

  • Hypoxemia: Symptoms can include dyspnea, cyanosis, restlessness, confusion, anxiety, tachypnea, tachycardia, hypertension, cardiac dysrhythmia, tremor, peripheral cyanosis (low PaO2).
  • Hypercapnia: Symptoms often include dyspnea, headache, other clinical manifestations like peripheral or conjunctival hyperemia, hypertension, tachycardia.

Management

  • Monitoring: Continuous pulse oximetry, assessment of sputum, and observation for pneumonia.
  • Positioning: Semi-Fowler's or seated position to facilitate diaphragmatic function; position can vary depending on lung disease characteristics.
  • Oxygenation: Supplemental oxygen to keep oxygen saturation above 90%. CPAP or mechanical ventilation may be necessary.
  • Chest Physiotherapy: Drainage and chest percussion to aid sputum removal.
  • Nutrition: Collaboration with physician and dietitian to ensure adequate nutrition.
  • Pain Management: Administration of analgesics to prevent hypoventilation.
  • Drug Therapy: Sedatives, neuromuscular blocking agents, bronchodilators, mucolytics, expectorants, and antibiotics.

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