Study guide
Emergency Airway Management & Neuro-Intubation
ABPN Neurocritical Care Study Guide Exam
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1 Chapter 1: Neurologic Examination & Coma Assessment in the ICU
Current Examination, Blueprint & Preparation Neurologic Examination in Critically Ill Patients Coma Evaluation & Consciousness Alterations Delirium & Toxic-Metabolic Encephalopathy in the ICU
2 Chapter 2: Cerebral Physiology & Intracranial Dynamics
Cerebral Blood Flow, Metabolism & Autoregulation Intracranial Pressure & Compliance Cerebral Edema & Herniation Syndromes
3 Chapter 3: Intracranial Hypertension & Cerebral Perfusion Management
Tiered ICP Management Protocols Hyperosmolar Therapy & Fluid Management Advanced & Refractory ICP Interventions
4 Chapter 4: Airway, Mechanical Ventilation & Pulmonary ICU Management
Emergency Airway Management & Neuro-Intubation Mechanical Ventilation Strategies in Acute Brain Injury Tracheostomy & Ventilator Weaning in Neurocritical Care Pulmonary Complications in the Neuro-ICU Obstructive Lung Disease, Pulmonary Hypertension & Bronchoscopy
5 Chapter 5: Hemodynamics, Shock & Cardiovascular Management
Hemodynamic Monitoring & Blood Pressure Targets Vasoactive Agents: Inotropes, Vasopressors & Antihypertensives Cardiac Complications of Brain Injury
6 Chapter 6: Neuropharmacology, Analgesia & Sedation
ICU Sedation & Analgesia Neuromuscular Blockade & Monitoring Propofol Infusion Syndrome & Drug Toxicities Antiseizure Drug Pharmacology in the ICU
7 Bleeding, Thrombosis & Hematologic Emergencies
Warfarin & Heparin Reversal Direct Oral Anticoagulant (DOAC) Reversal Antiplatelet Management & Platelet Dysfunction Venous Thromboembolism Prophylaxis & Management Transfusion, Coagulopathy, TMA & Cellular-Therapy Neurotoxicity
8 Chapter 8: Systemic ICU Care, Fluids, Electrolytes & Endocrine
Hyponatremia & Osmoregulation: SIADH vs Cerebral Salt Wasting Diabetes Insipidus, Hypernatremia & Endocrine Crises Critical Care Prophylaxis, Nutrition & Infection Prevention
9 Systemic Trauma & Environmental Injury
Polytrauma, Chest Injury & Abdominal Hemorrhage Burns, Electrical Injury & Hanging
10 Cardiac Emergencies & Mechanical Support
IABP, Ventricular Devices & ECMO Acute Coronary, Valvular, Rhythm & Aortic Emergencies
11 Kidney Injury, Acid–Base & Renal Replacement
Acute Kidney Injury & Renal Drug Clearance Acid–Base Disorders, Electrolytes & Renal Replacement
12 Systemic Infection & Endocrine Emergencies
Sepsis, Endocarditis & Antimicrobial Principles Thyroid, Adrenal & Dysglycemic Emergencies
13 Gastrointestinal & Hepatic Emergencies
Acute Abdomen, GI Bleeding & Abdominal Compartment Syndrome Acute Liver Failure, Cirrhosis & Hepatic Drug Effects
14 Chapter 9: Neuroimaging in the Neuro-ICU
Non-Contrast CT & CT Angiography CT Perfusion & Advanced Perfusion Imaging Magnetic Resonance Imaging in Critical Illness
15 Chapter 10: Electrophysiology & Neuromonitoring
Continuous EEG & ACNS Standardized Critical Care Terminology Invasive Neuromonitoring: ICP & External Ventricular Drains Multimodal Monitoring: PbtO2, Microdialysis & Transcranial Doppler
16 Angiography, Electrodiagnosis & CSF Analysis
Conventional Angiography & Cranial–Spinal Shunts EMG, Nerve Conduction & Acute Muscle Disease CSF Analysis: Infection, Inflammation & Hemorrhage
17 Chapter 11: Bedside Procedures, Ultrasound & Death by Neurologic Criteria
Critical Care Procedural Skills Critical Care Ultrasound & Echocardiography Determination of Death by Neurologic Criteria
18 Chapter 12: Acute Ischemic Stroke & Reperfusion Therapies
Acute Ischemic Stroke Management & Thrombolysis Endovascular Thrombectomy & Large Vessel Occlusion Malignant Hemispheric & Cerebellar Infarction
19 Chapter 13: Spontaneous Intracerebral Hemorrhage & Intraventricular Hemorrhage
Acute Intraparenchymal Hemorrhage Management Intraventricular Hemorrhage & Hydrocephalus Surgical Evacuation & Minimally Invasive Surgery in ICH
20 Chapter 14: Aneurysmal Subarachnoid Hemorrhage & Delayed Cerebral Ischemia
Aneurysmal Subarachnoid Hemorrhage: Acute Resuscitation & Securing Delayed Cerebral Ischemia & Cerebral Vasospasm Non-Aneurysmal Subarachnoid Hemorrhage & Vascular Malformations
21 Venous, Spinal & Traumatic Vascular Disease
Cerebral Venous Thrombosis & Spinal Cord Infarction Traumatic Dissection, Carotid–Cavernous Fistula & Penetrating Injury
22 Chapter 15: Traumatic Brain & Spinal Cord Injury
Severe Traumatic Brain Injury & Contusions Acute Traumatic Spinal Cord Injury & Neurogenic Shock Spine Trauma, Fractures & Cord Syndromes
23 Chapter 16: Status Epilepticus, Seizures & Neuromuscular Emergencies
Status Epilepticus: Convulsive & Non-Convulsive Refractory & Super-Refractory Status Epilepticus Acute Neuromuscular Respiratory Failure
24 Chapter 17: Post-Cardiac Arrest Care, CNS Infections & Encephalitis
Targeted Temperature Management & Post-Cardiac Arrest Care Post-Cardiac Arrest Neuroprognostication Acute CNS Infections, Encephalitis & Inflammatory Emergencies
25 Neuroinflammation & Neurooncology
Fulminant Demyelination & Autoimmune Encephalitis Brain, Spinal & Leptomeningeal Cancer Emergencies
26 Pregnancy, Transplantation & Pediatric Care
Pregnancy, Postpartum & Post-Transplant Neurologic Care Pediatric Neurocritical Care
27 Chapter 18: Neurosurgical & Perioperative Emergencies
Postoperative Neurosurgical Complications Device Complications: EVDs, Shunts & ICP Monitors Cerebral Hyperperfusion Syndrome & Post-Interventional Emergencies
28 Chapter 19: Ethics, Palliative Care & Organ Donation in the Neuro-ICU
Communication, Surrogate Decision-Making & Conflict Resolution Neuroprognostication Ethics, Withdrawal of Life Support & Palliative Care Organ Donation & Management of the Deceased Donor
Emergency Airway Management & Neuro-Intubation
Key Takeaways Explain This Topic AI
Emergency airway management in acute brain injury (ABI) demands a modified rapid sequence intubation (RSI) approach that strictly prioritizes the avoidance of secondary insults: eliminating hypoxemia (SpO2 < 90%), preventing systemic hypotension (SBP < 90 mmHg or MAP < 65 mmHg), and blunting the reflex sympathetic response to laryngoscopy (RSRL).
Routine lidocaine pretreatment is not recommended as proven neuroprotection; selected titrated fentanyl may blunt the sympathetic response but can worsen hypotension.
Induction choice balances cerebral metabolic suppression against hemodynamics: etomidate (0.2–0.3 mg/kg) provides hemodynamic neutrality despite transient adrenocortical suppression; ketamine (1–2 mg/kg) is safe in TBI, maintaining MAP and CPP through sympathetic tone; propofol (1–2 mg/kg) provides potent CMRO2 reduction but risks severe vasodilation and hypotension.
Rocuronium (1.0–1.2 mg/kg) is the preferred neuromuscular blocking agent, avoiding muscle fasciculations and with reversal by sugammadex when appropriate; reversal does not replace an emergency oxygenation plan; succinylcholine (1.5 mg/kg) must be avoided after the acute phase in denervating neurological injuries (stroke, paraplegia, neuropathy) due to lethal hyperkalemic cardiac arrest.
In suspected cervical spine trauma, video laryngoscopy performed with manual in-line stabilization (MILS) after opening the anterior cervical collar optimizes glottic visualization while minimizing cervical spine displacement.
Last updated: October 2026
Emergency Airway Management & Neuro-Intubation
Emergency endotracheal intubation in patients with acute brain injury (ABI)—including severe traumatic brain injury (TBI), aneurysmal subarachnoid hemorrhage (aSAH), massive intraparenchymal hemorrhage (ICH), and status epilepticus—represents one of the most perilous resuscitation procedures in neurocritical care. Unlike elective surgical intubation or standard medical-cardiac intubation, airway intervention in ABI must simultaneously secure oxygenation and ventilation while defending cerebral perfusion pressure ( C P P = M A P − I C P CPP = MAP - ICP CPP = M A P − I CP ) and shielding an already vulnerable, non-compliant intracranial compartment from secondary ischemic or herniation insults.
The Neuro-Intubation Imperatives: Hypoxia, Hypotension & ICP Surges
Secondary systemic insults during emergency intubation dramatically increase in-hospital morbidity and 6-month mortality in neurocritical care patients. Observational data and Brain Trauma Foundation (BTF) evidence emphasize three non-negotiable physiological targets during neuro-intubation:
Avoidance of Hypoxemia ( S p O 2 < 90 % SpO_2 < 90\% Sp O 2 < 90% ) : Even a single brief episode of desaturation ( P a O 2 < 60 mmHg PaO_2 < 60\text{ mmHg} P a O 2 < 60 mmHg or S p O 2 < 90 % SpO_2 < 90\% Sp O 2 < 90% ) is independently associated with a doubling of mortality in severe head trauma. Hypoxia triggers cerebral vasodilation, precipitating immediate surges in intracranial blood volume and intracranial pressure (ICP).
Avoidance of Hypotension ( S B P < 90 mmHg SBP < 90\text{ mmHg} SBP < 90 mmHg or M A P < 65 mmHg MAP < 65\text{ mmHg} M A P < 65 mmHg ) : A single documented episode of systolic hypotension drops cerebral perfusion pressure below the lower limit of cerebral autoregulation, transforming marginally perfused penumbral tissue into non-viable ischemic infarction. In patients with intracranial hypertension, maintenance of M A P ≥ 80 – 90 mmHg MAP \ge 80\text{--}90\text{ mmHg} M A P ≥ 80 – 90 mmHg is frequently necessary to preserve a target C P P ≥ 60 – 70 mmHg CPP \ge 60\text{--}70\text{ mmHg} CPP ≥ 60 – 70 mmHg .
Blunting the Reflex Sympathetic Response to Laryngoscopy (RSRL) : Direct mechanical stimulation of the base of the tongue, epiglottis, and vocal cords stimulates rich glossopharyngeal and vagal afferents, triggering an intense, polysynaptic sympathetic surge. In neuro-intact individuals, this reflex manifests as transient hypertension and tachycardia. In patients with impaired intracranial compliance, this catecholamine surge dramatically accelerates cerebral metabolic rate ( C M R O 2 CMRO_2 CMR O 2 ) and cerebral blood flow velocity, provoking acute, severe ICP spikes that can induce immediate transtentorial or tonsillar herniation.
Important
The core objective of neuro-intubation is not merely passing an endotracheal tube; it is securing the airway without precipitating a single episode of hypoxemia ( S p O 2 < 90 % SpO_2 < 90\% Sp O 2 < 90% ), hypotension ( S B P < 90 mmHg SBP < 90\text{ mmHg} SBP < 90 mmHg ), or reflex intracranial hypertension.
Pretreatment Pharmacology: Attenuating the Reflex Surge
When time permits (ideally administered 2 to 3 minutes prior to induction and laryngoscopy), pretreatment agents are utilized to blunt the sympathetic and airway reflexes:
Intravenous Lidocaine
Routine lidocaine pretreatment is not supported as a proven neuroprotective RSI intervention and should not delay airway management. Prioritize preoxygenation, pressure support, appropriate induction, and a first-pass plan. Lidocaine is not a reliable hemodynamically neutral safeguard against ICP rises.
Intravenous Fentanyl
Dosing : 1 to 3 μ g/kg 1\text{ to }3\text{ }\mu\text{g/kg} 1 to 3 μ g/kg IV administered slowly over 60 seconds approximately 3 minutes prior to laryngoscopy.
Physiological Mechanism : As a potent, rapid-acting synthetic μ \mu μ -opioid receptor agonist, fentanyl attenuates central sympathetic outflow and blunts the hemodynamic surges (hypertension and tachycardia) elicited by laryngoscopic blade pressure.
Clinical Pitfall & Warning : In patients with unresuscitated hypovolemic shock, cardiac tamponade, or neurogenic shock, even modest doses of fentanyl can cause sudden sympatholysis, resulting in precipitous hypotension. In hemodynamically unstable patients, fentanyl should be markedly reduced (e.g., 0.5 μ g/kg 0.5\text{ }\mu\text{g/kg} 0.5 μ g/kg ) or withheld entirely while pre-intubation vasopressors are mobilized.
Induction Pharmacology in Acute Brain Injury
The choice of induction agent must balance rapid onset of unconsciousness against systemic hemodynamic stability and cerebral metabolic effects:
Induction Agent Dose Effect on ICP & C M R O 2 CMRO_2 CMR O 2 Effect on MAP & CPP Advantages Critical Adverse Effects & Pitfalls
Etomidate 0.2 – 0.3 mg/kg 0.2\text{--}0.3\text{ mg/kg} 0.2 – 0.3 mg/kg Decreases ICP; decreases C M R O 2 CMRO_2 CMR O 2 Hemodynamically neutral; preserves MAP & CPP Rapid onset; minimal vasodilation; ideal for trauma and hemodynamically fragile ABI Transient inhibition of 11 β 11\beta 11 β -hydroxylase causing adrenocortical suppression; myoclonus (prevented by paralytic)
Ketamine 1.0 – 2.0 mg/kg 1.0\text{--}2.0\text{ mg/kg} 1.0 – 2.0 mg/kg Neutral to mild decrease in ICP (when ventilation controlled); decreases C M R O 2 CMRO_2 CMR O 2 Preserves or increases MAP & CPP via sympathetic tone Bronchodilation; maintains hemodynamics in shock; dispels historical dogma of ICP elevation Indirect sympathomimetic; may cause myocardial depression in catecholamine-depleted shock states
Propofol 1.0 – 2.0 mg/kg 1.0\text{--}2.0\text{ mg/kg} 1.0 – 2.0 mg/kg Marked decrease in ICP; marked decrease in C M R O 2 CMRO_2 CMR O 2 Potent decrease in MAP; significant drop in CPP Potent anticonvulsant; rapid offset; smooth suppression of airway reflexes Profound arterial vasodilation and myocardial depression; high risk of post-induction hypotension requiring vasopressors
Debunking the Ketamine Dogma in Neurocritical Care
For decades, medical training cautioned against using ketamine in patients with intracranial pathology based on small 1970s canine studies and reports in patients with obstructive hydrocephalus, which suggested that ketamine increased cerebrospinal fluid pressure. Modern neurocritical care literature, prospective randomized trials, and systematic reviews have thoroughly debunked this misconception. When hypoventilation is prevented and normocapnia is maintained, ketamine does not increase intracranial pressure. In fact, by preserving systemic vascular resistance and mean arterial pressure through central sympathetic stimulation, ketamine reliably protects cerebral perfusion pressure ( C P P CPP CPP ), making it an excellent first-line induction agent in patients with polytrauma, hemorrhagic shock, or borderline cerebral perfusion.
Note
Ketamine does not increase ICP in mechanically ventilated patients maintained at normocapnia. Its ability to maintain MAP makes it a preferred induction choice in traumatic brain injury complicated by systemic hypotension.
Neuromuscular Blockade: Rocuronium vs. Succinylcholine
Rapid, complete muscular relaxation is mandatory during neuro-intubation to abolish coughing, bucking, and muscular rigidity, all of which directly transmit central venous pressure spikes to the cerebral venous circulation, provoking severe intracranial hypertension.
Parameter Rocuronium Succinylcholine
Mechanism Non-depolarizing competitive antagonist at post-junctional nicotinic acetylcholine receptors Depolarizing agonist at nicotinic acetylcholine receptors; produces transient phase I block
Intubation Dose 1.0 to 1.2 mg/kg 1.0\text{ to }1.2\text{ mg/kg} 1.0 to 1.2 mg/kg IV 1.5 mg/kg 1.5\text{ mg/kg} 1.5 mg/kg IV
- Onset Time 60 seconds (comparable to succinylcholine at 1.2 mg/kg 1.2\text{ mg/kg} 1.2 mg/kg ) 45–60 seconds
- Duration of Action 45–70 minutes 6–10 minutes
Fasciculations None (no muscle spindle stimulation) Marked fasciculations; transient minor ICP rise if unblunted
Reversal Agent Sugammadex ( 16 mg/kg 16\text{ mg/kg} 16 mg/kg for immediate rescue reversal) None (hydrolyzed by plasma pseudocholinesterase)
Absolute Contraindications Severe hypersensitivity / anaphylaxis to rocuronium Known malignant hyperthermia susceptibility; preexisting hyperkalemia; denervation injury > 48 hours > 48\text{ hours} > 48 hours ; burns/crush > 48 hours > 48\text{ hours} > 48 hours
The Lethal Hyperkalemia Hazard of Succinylcholine
Succinylcholine binds to post-junctional nicotinic acetylcholine receptors, triggering sustained depolarization that releases intracellular potassium into the systemic circulation. In healthy individuals, this causes a benign, transient serum potassium elevation of 0.5 mEq/L 0.5\text{ mEq/L} 0.5 mEq/L . However, in patients with upper or lower motor neuron denervation—such as ischemic or hemorrhagic stroke with hemiplegia, traumatic spinal cord injury, prolonged critical illness immobility, or severe Guillain-Barré syndrome—immature embryonic acetylcholine receptors (specifically the α 7 \alpha_7 α 7 homopentamer and α 1 β 1 γ δ \alpha_1\beta_1\gamma\delta α 1 β 1 γ δ fetal isoforms) proliferate across the entire extrajunctional muscle sarcolemma over time after injury, with onset and duration varying.
Administration of succinylcholine to a patient with denervation or subacute neurologic injury results in massive, uninhibited potassium efflux, rapidly elevating serum potassium by 4 to 10 mEq/L 4\text{ to }10\text{ mEq/L} 4 to 10 mEq/L within minutes. This precipitates refractory hyperkalemic ventricular fibrillation, asystole, and cardiac arrest that is notoriously resistant to standard cardiopulmonary resuscitation.
Warning
Never administer succinylcholine to a patient with an acute neurological deficit (stroke with hemiplegia, paraplegia, spinal cord injury) or extensive burn/crush injury older than 48 hours. The massive proliferation of extrajunctional acetylcholine receptors triggers fatal hyperkalemic cardiac arrest.
High-dose rocuronium provides rapid intubating conditions but can obscure the motor examination for a prolonged period. Sugammadex reverses rocuronium blockade under appropriate conditions; 16 mg/kg is the labeled immediate-reversal dose after a 1.2 mg/kg rocuronium dose. It does not guarantee immediate oxygenation or reverse sedative, structural-airway, or other causes of failure. In cannot-intubate/cannot-oxygenate, continue oxygenation rescue and proceed to the indicated emergency front-of-neck airway without waiting for reversal to solve the crisis.
Difficult Airway & Cervical Spine Immobilization
Airway management in neurocritical care frequently intersects with traumatic cervical spine instability and distorted airway anatomy. Meticulous procedural discipline prevents catastrophic spinal cord transection or hypoxic arrest.
Cervical Spine Management in Neurotrauma
Every trauma patient with acute brain injury must be presumed to harbor an unstable cervical spine injury until cleared by computed tomography and clinical examination. Standard rigid cervical collars restrict mouth opening (reducing inter-incisor distance by up to 50%) and impair direct laryngoscopic alignment.
Collar Management : During intubation, an assistant unbuckles and removes the anterior half of the rigid cervical collar to allow adequate jaw opening, while maintaining manual in-line stabilization (MILS).
Manual In-Line Stabilization (MILS) : An experienced assistant stands beside or at the head of the bed, placing their hands firmly over the patient's mastoid processes and occiput, applying counter-traction to neutralize flexion, extension, and axial rotation without applying excessive longitudinal traction.
Video Laryngoscopy (VL) as First-Line : Hyperangulated video laryngoscopy (e.g., GlideScope) or channeled video laryngoscopes are the preferred primary modalities. VL enables excellent glottic visualization without requiring the practitioner to force the patient's oral, pharyngeal, and laryngeal axes into a linear plane, thereby minimizing cervical spine motion and soft-tissue airway trauma.
Surgical Airway Rescue: Emergency Cricothyroidotomy
In the event of a failed intubation and failed rescue ventilation via a supraglottic airway (laryngeal mask airway), the clinician enters the "Cannot Intubate, Cannot Oxygenate" (CICO) algorithm. Hypoxemia can rapidly cause irreversible injury; no fixed minute count establishes BD/DNC. The neurointensivist must immediately execute an emergency scalpel-bougie-tube cricothyroidotomy :
Palpate the cricothyroid membrane between the thyroid cartilage and cricoid cartilage.
Stabilize the laryngeal framework with the non-dominant hand.
Make a vertical midline skin incision followed by a horizontal stab incision through the cricothyroid membrane using a #10 or #11 scalpel blade.
Maintain the tract with the scalpel handle or a blunt tracheal hook, introduce a standard gum elastic bougie into the trachea, and advance a cuffed 6.0 mm 6.0\text{ mm} 6.0 mm endotracheal tube or tracheostomy tube over the bougie.
Inflate the cuff, confirm end-tidal C O 2 CO_2 C O 2 , and secure the surgical airway.