Study guide
Airway, Oxygenation, Ventilation, and Emergence Complications
CAPA Certification Study Guide Exam
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1 Introduction & CAPA Exam Strategy
1.1 Current CAPA Exam Facts 1.2 What CAPA Covers vs CPAN 1.3 Eight-to-Fourteen Week CAPA Study Strategy 1.4 Official Resources and Readiness Checklist
2 Anesthesia, Sedation, and Medication Judgment
2.1 Anesthesia Techniques and the Sedation Continuum 2.2 Anesthetic Agents, Reversal Drugs, and Toxicity Recognition 2.3 Preoperative Processes, Consent, and Special Populations 2.4 Positioning, Injury Prevention, Recovery, and Discharge Teaching
3 Physiology, Assessment, and Complication Recognition
3.1 Pre-Admission Screening and Baseline Assessment 3.2 Respiratory, Cardiovascular, and Perfusion Status 3.3 Procedure and Anesthesia Responses Across Body Systems 3.4 Pre-Existing Conditions, Fluids, Electrolytes, and Temperature
4 Perianesthesia Monitoring and Intervention
Hemodynamic Monitoring and Vital-Sign Interpretation Airway, Oxygenation, Ventilation, and Emergence Complications Fluids, Electrolytes, Thermoregulation, and Abnormal Physiologic Conditions Pain, Sedation, Pharmacology, Interactions, and PONV Lines, Drains, Blood Products, Infection Prevention, and Tissue Integrity Ambulatory Safety, Positioning, Environmental Injury Prevention, and Emergency Response
5 Ambulatory Perianesthesia Care Considerations
Continuum, Transfer of Care, and Safe Flow Individualized Care for Ambulatory Special Populations Psychosocial, Environmental, Behavioral Health, and Learning Factors Discharge Readiness, Home Planning, and Resources
6 Professional Practice, Standards, and Final Review
6.1 Professional Standards, Accepted Guidelines, and Team Collaboration 6.2 Evidence-Based Practice and Emergency Guideline Awareness 6.3 Legal, Ethical, Regulatory, and Documentation Accountability 6.4 Final 7-Day Review Plan and Capstone Mixed Practice
Airway, Oxygenation, Ventilation, and Emergence Complications
Key Takeaways Explain This Topic AI
Airway obstruction is often first heard as snoring, gurgling, stridor, or silence with visible effort; treat positioning and patency before assuming the problem is only low oxygen delivery.
Pulse oximetry reflects oxygenation, while capnography and clinical assessment better reveal ventilation and hypoventilation after opioids, sedatives, or residual anesthesia.
Laryngospasm, bronchospasm, aspiration, opioid-induced respiratory depression, and obstructive sleep apnea require rapid recognition and escalation in ambulatory recovery.
Emergence delirium is managed by protecting the patient, treating reversible causes such as hypoxia and pain, and using a calm low-stimulation environment.
Last updated: May 2026
Airway Comes First
The perianesthesia nurse should be ready to intervene before oxygen saturation falls. A patient with snoring respirations, paradoxical chest movement, retractions, nasal flaring, stridor, gurgling, or declining responsiveness may be obstructing or hypoventilating. The monitor may lag behind the clinical problem, especially when supplemental oxygen is masking poor ventilation.
Oxygenation Versus Ventilation
Oxygenation is the movement of oxygen into blood. Pulse oximetry helps monitor this, but it can look acceptable for several minutes when the patient receives supplemental oxygen.
Ventilation is carbon dioxide removal. Respiratory rate, chest excursion, level of consciousness, breath sounds, and end-tidal carbon dioxide (EtCO2) monitoring help detect hypoventilation earlier than oxygen saturation alone.
Monitor or Sign Best Use Limitation
Pulse oximetry Oxygen saturation trend Delayed change with supplemental oxygen; affected by poor perfusion, motion, nail products
EtCO2 waveform Ventilation, apnea, airway patency Nasal sampling can be displaced; readings vary with oxygen flow and mouth breathing
Respiratory rate Quick bedside trend Can be inaccurate if shallow breathing is counted poorly
Breath sounds Air movement and obstruction clues Requires repeated assessment; may be hard to hear in noisy areas
- Work of breathing Distress recognition Fatigued patients may become quiet before arrest
- Partial Airway Obstruction
Snoring after anesthesia usually means the tongue or soft tissue is obstructing the pharynx. The first response is to reposition: head tilt-chin lift or jaw thrust as appropriate, lateral positioning when safe, and removal of visible obstruction. Apply oxygen, stimulate the patient, and use an oral or nasal airway when indicated and tolerated.
An oropharyngeal airway (OPA) helps keep the tongue from occluding the airway in an unconscious patient without a gag reflex. It can trigger gagging or vomiting in a more awake patient. A nasopharyngeal airway (NPA) may be better tolerated in a semiconscious patient, but it is avoided or used cautiously when facial or basilar skull trauma is suspected.
Laryngospasm and Stridor
Laryngospasm is a reflex closure of the vocal cords. It may present with high-pitched stridor, poor air movement, suprasternal retractions, desaturation, and anxiety or agitation. Immediate actions include calling for anesthesia help, removing the stimulus if present, applying continuous positive airway pressure with 100% oxygen if trained and within policy, repositioning, suctioning secretions if needed, and preparing for medication or reintubation.
Post-thyroidectomy or neck surgery stridor is especially concerning because edema, hematoma, or recurrent laryngeal nerve problems can quickly threaten the airway. Neck swelling, tight dressing, voice change, and respiratory distress require urgent escalation.
Bronchospasm, Aspiration, and OSA
Bronchospasm causes wheezing, prolonged expiration, increased work of breathing, and sometimes rising EtCO2. Initial nursing priorities are airway positioning, oxygen, stopping triggers, notifying anesthesia, and preparing bronchodilator therapy. Patients with asthma, chronic obstructive pulmonary disease, recent respiratory infection, or airway irritability are higher risk.
Aspiration may appear as coughing, wheezing, hypoxemia, crackles, tachypnea, or unexpected respiratory distress. Keep the airway clear, position to reduce further aspiration when safe, suction as needed, apply oxygen, notify the provider, and anticipate chest imaging, extended observation, or transfer depending on severity.
Patients with obstructive sleep apnea (OSA) need careful ventilation and sedation monitoring. Opioids and sedatives worsen airway collapsibility and blunt arousal. A patient who repeatedly obstructs when unstimulated is not ready for routine discharge simply because they wake when spoken to.
Emergence Delirium and Agitation
Emergence agitation may be caused by hypoxia, hypercarbia, pain, bladder distention, anxiety, neurologic disease, medication effects, or unfamiliar surroundings. The nurse protects lines and the surgical site, reduces stimulation, reorients calmly, assesses oxygenation and ventilation, treats pain and physiologic triggers, and seeks help before the patient harms themselves.
Agitation plus low saturation is an airway problem until proven otherwise. Do not restrain without assessing reversible causes. In ambulatory care, agitation also delays discharge because the patient cannot safely understand instructions, ambulate, or protect the operative site.