What are the optimal rapid‑sequence intubation medications for an adult with a hemorrhagic stroke to preserve blood pressure and avoid increasing intracranial pressure?

Optimal Medications for Intubating a Hemorrhagic Stroke Patient

For rapid sequence intubation in hemorrhagic stroke, use high-dose fentanyl (3–5 µg/kg) or remifentanil for analgesia, ketamine (1–2 mg/kg) as the induction agent to maintain blood pressure, and rocuronium (1 mg/kg) or succinylcholine (1.5 mg/kg) for neuromuscular blockade, with vasopressors immediately available to maintain systolic blood pressure <150 mmHg. 1

Blood Pressure Targets During Intubation

The primary goal is maintaining adequate cerebral perfusion while avoiding hypertensive surges that could expand the hematoma:

• Target systolic blood pressure >140 mmHg but <150 mmHg if within 6 hours of symptom onset and immediate surgery is not planned 1
• Maintain mean arterial pressure (MAP) >90 mmHg to ensure adequate cerebral perfusion 1
• Have vasopressors (ephedrine or metaraminol) immediately available to treat hypotension 1

Induction Agent Selection

Ketamine is the preferred induction agent for hemorrhagic stroke patients, particularly those who are hemodynamically unstable:

• Ketamine 1–2 mg/kg provides hemodynamic stability and maintains cerebral perfusion pressure 1
• Historical concerns about ketamine increasing intracranial pressure are unfounded; it has a neutral hemodynamic profile and is possibly the ideal agent for neurologically injured patients 2
• Etomidate may be considered but produces more hypotension than ketamine in shock states 3, 4
• Propofol should be avoided or used in very low doses due to significant hypotensive effects 1

Opioid Pretreatment

High-dose opioids are essential to blunt the hemodynamic response to laryngoscopy:

• Fentanyl 3–5 µg/kg administered 130 seconds before intubation 1
• Alternative: Alfentanil 10–20 µg/kg 1
• Alternative: Remifentanil target-controlled infusion (Cpt ≥3 ng/mL) 1
• Use lower doses in hemodynamically unstable patients 1
• Fentanyl helps blunt the hemodynamic response and can reduce intracranial pressure increases during intubation 2

Neuromuscular Blockade

Either rocuronium or succinylcholine is appropriate, with rocuronium increasingly preferred:

• Rocuronium 1 mg/kg provides similar intubating conditions to succinylcholine and may be more rational in critically ill patients 5
• Succinylcholine 1.5 mg/kg remains an option but has numerous side effects including life-threatening hyperkalemia 1, 5
• Rocuronium can be reversed with sugammadex if needed, though this does not guarantee airway patency 5
• Use of neuromuscular blocking agents reduces intubation complications in critically ill patients 5

Medications to AVOID

Lidocaine pretreatment is NOT recommended:

• Despite historical use, there is no evidence that lidocaine decreases intracranial pressure during intubation 2
• Studies show lidocaine 1.5 mg/kg does not prevent increases in MAP or ICP during intubation 6
• Lidocaine may still be used for its local anesthetic properties but should not be relied upon for ICP control 2

Defasciculating doses of non-depolarizing agents are NOT beneficial:

• Prefasciculation doses have not been shown to have any effect on intracranial pressure 2

Ventilation Strategy

Maintain normocapnia (PaCO₂ 4.5–5.0 kPa) throughout the intubation process:

• Target PaCO₂ of 4.5–5.0 kPa (approximately 34–38 mmHg) for hemorrhagic stroke 1
• Brief periods of PaCO₂ 4.0–4.5 kPa may be used only if impending uncal herniation 1
• Avoid both hypercarbia (which increases ICP) and excessive hyperventilation 7
• Use facemask ventilation with CPAP between attempts if hypoxia occurs 5

Hemodynamic Management

Aggressive blood pressure support is critical:

• Use invasive arterial monitoring with transducer at the level of the tragus if time permits 1
• If not possible, use non-invasive blood pressure monitoring at 1-minute intervals 1
• Have vasopressors drawn up and ready before induction 1
• Metaraminol or ephedrine boluses should be immediately available 1
• Consider starting a vasopressor infusion (e.g., metaraminol) before induction in unstable patients 1

Common Pitfalls to Avoid

• Do not use propofol as sole induction agent in hemorrhagic stroke—it causes excessive hypotension 1
• Do not delay intubation for "ideal" conditions—if the patient needs airway protection, proceed with available resources 1
• Do not use excessive doses of any agent in hemodynamically unstable patients—titrate carefully 1
• Do not forget cricoid pressure if aspiration risk exists, but be prepared to release it if it impairs laryngoscopy 5
• Do not hyperventilate prophylactically—there is no evidence of benefit and potential for harm 7