Extubation & recovery

Overview & definition

The extubation and the recovery are the phases that close the anaesthetic — the removal of the endotracheal tube and the restoration of the spontaneous ventilation, the consciousness, and the protective reflexes, followed by the recovery-room (the PACU) management until the discharge. These phases are the high-risk: the airway complications (the laryngospasm, the obstruction, the negative-pressure pulmonary oedema), the cardiovascular and the respiratory instability, and the common postoperative problems (the PONV, the pain, the shivering, the hypoxaemia) cluster at the extubation and the emergence. The Difficult Airway Society extubation guidelines reframe the extubation as the planned, the stepwise, the high-risk airway event — the not the routine.[1]

The extubation as the high-risk airway event

The extubation carries the complication rate comparable to the intubation (and higher for the respiratory events), yet it has historically received the less planning and the less attention. The complications — the coughing and the bucking (the hypertension, the tachycardia, the raised intraocular and the intracranial pressure), the laryngospasm, the airway obstruction, the negative-pressure pulmonary oedema, the hypoxaemia, the vomiting and the aspiration, the emergence agitation — cluster at the extubation. The DAS extubation guidelines (the 2012, with the ongoing discussion) provide the stepwise plan, the risk stratification, and the strategies (the awake, the deep, the staged) for the safe extubation, especially the difficult airway.[1]

The DAS extubation guidelines — the stepwise plan

The DAS guidelines structure the extubation as the four-step plan:[1]

1. Plan the extubation — the risk assessment (the difficult intubation, the airway oedema, the restricted access, the obesity, the obstructive sleep apnoea, the aspiration risk), the awake vs the deep vs the staged decision, the back-up plan (the reintubation strategy, the equipment, the team).
2. Prepare for the extubation — the patient warmed, the analgesia and the antiemetic given, the residual neuromuscular blockade excluded (the sugammadex or the neostigmine, the train-of-four), the suction, the position, the oxygen, the team ready.
3. Perform the extubation — the suction, the deflation of the cuff, the tube removal at the end-expiration, the immediate oxygen.
4. The post-extubation care — the oxygen, the observation, the management of the complications, the recovery-room handover. [1]

The guidelines emphasise the "the extubate awake unless there is a reason not to" and the staged extubation for the high-risk.[1]

The extubation criteria

The awake extubation criteria (the standard for most):[1]

• The consciousness — the patient awake, the eyes open, the responding to the commands.
• The airway reflexes — the cough, the swallow, the gag returned.
• The neuromuscular recovery — the sustained head lift for 5 seconds, the train-of-four ratio above 0.9 (the objective), the respiratory pattern normal.
• The ventilation — the adequate tidal volume, the respiratory rate, the normocapnia, the oxygen saturation.
• The haemodynamics — the stable, the no excessive secretion, the no airway oedema.
• The temperature — the normothermia (the hypothermia impairs the recovery). [1]

The patient who does not meet the criteria remains intubated and ventilated until the criteria are met (the delayed extubation), rather than the premature extubation.[1]

The awake versus the deep extubation

The two main strategies:[1]

• The awake extubation — the standard for the most, the airway reflexes returned, the lower risk of the laryngospasm and the obstruction, the safer for the aspiration-risk and the difficult airway. The coughing and the haemodynamic surges are the trade-offs (the blunting with the lidocaine, the opioid, the beta-blocker, the dexmedetomidine).
• The deep extubation — the tube removed under the deep anaesthesia (the patient still unconscious), the avoidance of the coughing and the haemodynamic surges, the smoother for the smooth-muscle (the asthma, the bronchial reactivity) and the neurosurgery. The higher risk of the airway obstruction and the laryngospasm (the unprotected airway), the aspiration-risk unsuitable, the requires the skilled airway management and the careful selection.[1]

The extubation of the difficult airway

The difficult-airway extubation is the PLANNED event (the DAS guidelines):[1]

• The risk factors. The difficult intubation, the airway oedema (the prolonged surgery, the prone, the Trendelenburg, the large fluid resuscitation, the head and the neck surgery), the restricted access (the maxillo-mandibular fixation, the cervical immobilisation, the halo), the obesity and the OSA, the aspiration risk, the failed previous extubation.
• The staged extubation. The extubation over an airway exchange catheter (the AEC) left in situ after the extubation, providing the conduit for the rapid reintubation if the airway is lost. The AEC is the bridge — the patient oxygenated and monitored, the reintubation feasible over the catheter. The staged extubation is the strategy for the high-risk.
• The cuff-leak test. The assessment of the airway patency before the extubation of the intubated with the suspected oedema (the prolonged, the airway surgery, the prone) — the deflation of the cuff and the assessment of the leak around the tube (the cuff-leak volume). The reduced leak suggests the oedema and the post-extubation obstruction risk. The test is the not-perfect (the false negative and the false positive) but the informative.[1]
• The back-up. The reintubation plan, the equipment ready, the skilled team, the reintubation-able-over-the-AEC.

The laryngospasm

The laryngospasm — the sustained closure of the vocal cords — is the common and the dangerous extubation complication, especially in the children, the upper-respiratory-tract-infection, the smoking, the passive smoker, the irritant airway (the blood, the secretions). The presentation: the inspiratory stridor, the "the crowing", the paradoxical chest movement, the rapid desaturation. The management: the 100 per cent oxygen via the mask, the jaw thrust, the Larson manoeuvre (the bilateral firm pressure at the "the laryngospasm notch" — the behind the ear, the inward and the forward), the suction of the irritant, the propofol (the small dose to break the spasm), the suxamethonium if the refractory (the IV or the IM), the reintubation if the failed. The prevention: the deep or the wide-awake extubation (the not the semi-awake), the suction, the avoidance of the irritant, the subhypnotic propofol (the evidence in the paediatric).[3]

The post-extubation stridor and the airway obstruction

The post-extubation stridor (the inspiratory) signals the upper-airway obstruction — the cord dysfunction (the paralysis, the oedema), the laryngeal oedema (the prolonged intubation, the trauma, the fluid), the supraglottic oedema (the prone, the Trendelenburg, the head and the neck). The management: the humidified oxygen, the nebulised adrenaline (the racemic), the dexamethasone (the IV, the onset hours), the head-up position, the heliox (the reduced turbulence), the continuous-positive-airway-pressure, the reintubation if the worsening. The negative-pressure pulmonary oedema — the oedema from the forceful inspiration against the obstructed airway (the closed glottis) — is the recognised complication of the obstruction.[1]

The emergence and the emergence agitation

The emergence — the return of the consciousness — is usually smooth, but the emergence agitation (the restlessness, the thrashing, the not-purposeful movement, the inconsolability) is the common in the children (the sevoflurane, the pain, the anxiety, the pre-school age, the unfamiliar environment) and the adults (the pain, the bladder distension, the hypoxia, the residual drug). The dexmedetomidine reduces the emergence agitation in the children (the evidence).[4] The management: the reassurance, the pain control, the exclusion of the hypoxia and the metabolic cause, the low-dose sedative if the severe (the propofol, the dexmedetomidine), the safety (the falls, the line removal). The differentiation from the delirium (the fluctuating, the disorientation) and the pain.[4]

The recovery room (the PACU)

The post-anaesthesia care unit (the PACU) is the structured recovery — the phase 1 (the immediate, the intensive monitoring, the airway and the haemodynamic recovery) and the phase 2 (the preparation for the discharge, the ambulation, the oral intake). The PACU requires: the continuous monitoring (the ECG, the pulse oximetry, the blood pressure, the capnography if the deep sedation), the trained nursing (the 1-to-1 in the phase 1), the oxygen, the suction, the airway equipment, the emergency drugs, the warming, the pain and the PONV protocols. The handover (the SBAR — the anaesthetic, the surgery, the airway, the drains, the fluids, the drugs, the allergies, the plan). The anaesthetist remains the responsible until the discharge.[5][6]

The common recovery complications

The recovery complications and their management:[5][6]

• The hypoxaemia — the commonest; the oxygen, the airway, the ventilation, the cause (the atelectasis, the obstruction, the opioid, the residual relaxant).
• The hypotension and the hypertension — the cause (the hypovolaemia, the bleeding, the vasodilation, the pain, the bladder distension); the treatment.
• The PONV — the rescue antiemetic (the different class), the opioid-sparing (the Sung evidence); the risk-stratified prophylaxis from the theatre.[5]
• The pain — the multimodal, the regional, the opioid-sparing; the paediatric recovery analgesia (the hydromorphone vs the fentanyl).[6]
• The shivering — the active warming, the opioid (the pethidine, the tramadol), the clonidine; the prevention (the warming, the fluid warming).
• The hypothermia — the warming, the monitoring.
• The delayed emergence — the cause (the residual drug, the opioid, the metabolic, the neurological); the reversal, the ABG, the glucose.
• The urinary retention — the scan, the catheter.

The discharge criteria

The discharge from the PACU is governed by the objective scoring (the Aldrete, the PADSS) — the activity, the respiration, the circulation, the consciousness, the oxygenation (the Aldrete; the 9 to 10 for the discharge), and the pain, the PONV, the surgical bleeding, the oral intake, the voiding (the PADSS). The discharge to the ward (the Aldrete near the baseline), the day-case discharge (the PADSS, the escort, the instructions), or the ICU (the high-risk). The anaesthetist's sign-off.[1]

The paediatric recovery

The paediatric recovery has the specific features: the higher laryngospasm and the emergence-agitation risk, the weight-based dosing, the parental presence (the calming), the distraction, the temperature (the infants), the pain assessment (the age-appropriate scales). The dexmedetomidine for the emergence agitation, the subhypnotic propofol for the laryngospasm, the hydromorphone vs the fentanyl for the analgesia are the evidence-supported interventions.[3][4][6]

[1] [1]

Red flags

[1] [1] [1] [1] [1]

References

1. [1]Cooper RM, et al. Difficult Airway Society guidelines for the management of tracheal extubation Anaesthesia, 2013.PMID 23298360
2. [2]Higgs A, et al. Pre-oxygenation before extubation Anaesthesia, 2015.PMID 26152265
3. [3]Albannai N, et al. Effect of Subhypnotic Dose of Propofol on Respiratory Adverse Events Following Postoperative Tonsillectomy/Adenotosillecomy: A Systematic Review and Meta-Analysis J Clin Med, 2026.PMID 41827489
4. [4]Wang L, et al. Efficacy of dexmedetomidine in preventing emergence agitation in children undergoing tonsillectomy and/or adenoidectomy: a meta-analysis and systematic review BMC Anesthesiol, 2025.PMID 41469848
5. [5]Sung TY, et al. Effect of Opioid-Sparing Anesthesia on Postoperative Nausea and Vomiting After Breast Surgery: A Single-Center Randomized Controlled Trial J Clin Med, 2026.PMID 42355627
6. [6]Miller GC, et al. A Triple-Blinded, Randomized, Controlled Trial Comparing Hydromorphone vs. Fentanyl for Children Undergoing Tonsillectomy Paediatr Anaesth, 2026.PMID 42312422