CPR APPLICATIONS FOUNDATION · CHAPTER 8 · TREATMENT
Treatment Foundations of the Pulmonary System
Organize the chapter before drilling into individual CPR concepts.
Supplemental foundation map: this page orients the detailed CPR Applications for Chapter 8. It is not part of the canonical CPR object inventory.
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Normal Foundations
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Treatment Foundations · You are here
8.28 · SOURCE CPR FOUNDATION
Concept
Pulmonary therapies target airway tone, airway inflammation, mucus and infection risk, gas exchange, ventilatory drive, and pulmonary vascular flow. Step 1 usually tests mechanism rather than guideline staging. The key is knowing whether an intervention opens airways, prevents future narrowing, improves oxygenation, treats infection, or changes pulmonary hemodynamics.
Pattern
Most treatment stems are mechanism-recognition problems. A new inhaler may provide rapid bronchodilation or long-term anti-inflammatory control, oxygen treats hypoxemia, while excessive oxygen can worsen hypercapnia in susceptible patients; titrate oxygen to an appropriate target rather than withholding it, and infection therapy depends on matching the syndrome to the likely organism category. The intervention should map back to airway resistance, inflammation, V/Q behavior, ventilatory drive, antimicrobial target, or vascular obstruction.
Rule
- Separate rescue from control: rescue therapy changes airflow now, while controller therapy lowers future inflammation and exacerbation risk.
- Separate oxygenation from ventilation: oxygen improves saturation, but CO₂ clearance depends on effective alveolar ventilation and dead-space burden.
- Match treatment to the dominant pulmonary mechanism: bronchospasm, inflammation, infection, shunt, dead space, pulmonary vascular obstruction, and pulmonary hypertension require different therapeutic logic.
Applications
- Immediate inhaler relief → bronchodilation
- Fewer exacerbations over weeks → controller therapy
- At risk of hypercapnic respiratory failure → use controlled oxygen, often targeting SpO₂ 88–92% pending blood gases in noncritical settings; do not withhold needed oxygen
- ARDS requiring invasive ventilation → lung-protective low tidal volumes and individualized PEEP; avoid injurious recruitment maneuvers
- Acute pulmonary embolism → anticoagulation when indicated; reperfusion is reserved for selected high-risk presentations
- Tip: Identify the pulmonary mechanism before choosing the therapy.
CPR APPLICATIONS · ACTIVE REASONING
Separate oxygenation, ventilation, and causal treatment
Choose a prediction before checking the mechanism. Expand the worked answers without scripts. No learner responses are stored or transmitted.
Reveal worked answer and transfer
Best answer: Provide controlled oxygen with monitoring and an appropriate target. Do not withhold needed oxygen. In many at-risk noncritical settings, an initial SpO₂ target of 88–92% is used pending blood gases; critically ill patients need immediate stabilization.
Change one variable: Why can excessive oxygen worsen hypercapnia through V/Q and Haldane effects rather than simply loss of respiratory drive?
Reveal worked answer and transfer
Best answer: An inhaled short-acting bronchodilator. Short-acting inhaled bronchodilators can rapidly relieve reversible airway narrowing; long-term controllers address ongoing inflammation and exacerbation risk.
Change one variable: Why is improving airflow different from treating airway inflammation over weeks?
Reveal worked answer and transfer
Best answer: Lung-protective low tidal volume ventilation with individualized PEEP. Low tidal volume ventilation based on predicted body weight and appropriately managed pressures/PEEP reduce injurious stretch; avoid indiscriminate recruitment maneuvers.
Change one variable: How do you distinguish oxygenation support from treating the precipitating cause of ARDS?
Change the mechanism
Compare the three scenarios without scripts
- Acute bronchospasm: Short-acting bronchodilation addresses rapid airflow limitation.
- Hypercapnia risk with hypoxemia: Titrate oxygen to target and monitor blood gases; do not withhold life-saving oxygen.
- ARDS requiring invasive ventilation: Use lung-protective tidal volumes and individualized ventilatory support while treating the cause.
Explain it back: Choose one decision, trace the causal mechanism, and identify the observation that would overturn your prediction.
These unscored exercises do not establish psychometric validation or patient-specific treatment recommendations.
How to use this foundation map
- Identify the organizing mechanism.
- Recognize the pattern.
- Restate the rule without looking.
- Test transfer with the applications and question practice.
Pair CPR with the 5P Approach™ when solving cases and questions.