Management of Refractory Shock

Vasopressor Therapy

The American College of Critical Care Medicine recommends adding vasopressin 0.03 units/min (up to 0.04 units/min maximum) to the existing norepinephrine infusion when target MAP cannot be achieved by norepinephrine alone 1, 2, 3
The Society of Critical Care Medicine suggests that vasopressin should not be used as a single initial vasopressor; it must be combined with norepinephrine 2
If MAP remains inadequate despite norepinephrine plus vasopressin, the European Society of Cardiology recommends adding epinephrine 0.05-0.3 mcg/kg/min as a third-line agent 1, 2, 4, 5
Epinephrine provides both alpha and beta-adrenergic stimulation, increasing both vascular tone and cardiac output, according to the American College of Critical Care Medicine 2

The Society of Critical Care Medicine recommends administering hydrocortisone 200-300 mg/day immediately for refractory shock unresponsive to vasopressors, with a strength of evidence level of 1 7, 6
The European Society of Intensive Care Medicine suggests continuing hydrocortisone for at least 5 days followed by a tapering dose, with a moderate level of evidence 7, 6
The American College of Cardiology recommends considering dobutamine rather than increasing norepinephrine dose if cardiac dysfunction with persistent hypoperfusion exists despite adequate MAP, with a high level of evidence 8, 1

The European Society of Cardiology recommends immediate endotracheal intubation and mechanical ventilation for patients with respiratory rate of 40 and unrecordable blood pressure, with a high level of evidence 8, 4
The American Thoracic Society suggests targeting low tidal volume 4-8 mL/kg predicted body weight if ARDS is present, with a moderate level of evidence 1
The Society of Critical Care Medicine recommends maintaining plateau pressures <30 cm H₂O, with a high level of evidence 1

The European Society of Cardiology recommends establishing an arterial line immediately for continuous blood pressure monitoring, with a high level of evidence 8, 2
The American College of Critical Care Medicine suggests considering pulmonary artery catheterization or other advanced hemodynamic monitoring to guide therapy, with a moderate level of evidence 8, 2
The Society of Critical Care Medicine recommends targeting MAP ≥65 mmHg as a minimum goal, with a high level of evidence 1, 2, 3, 10

The European Society of Cardiology recommends considering mechanical circulatory support rather than adding more pharmacologic agents if there is an inadequate response to combined vasopressor therapy, with a high level of evidence 8, 9
The American Heart Association suggests that short-term mechanical circulatory support may be considered in refractory shock depending on age, comorbidities, and neurological function, with a moderate level of evidence 8

The American College of Critical Care Medicine recommends using a conservative fluid strategy in established shock with vasopressor requirement, with a moderate level of evidence 1
The World Society of Emergency Surgery suggests that overly aggressive fluid resuscitation increases intra-abdominal pressure and worsens outcomes, with a high level of evidence 10