Airway, Oxygenation, Ventilation, and Emergence Complications

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.

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.