Hypoalbuminemia and Pulmonary Edema
Pathophysiological Mechanism
- A serum albumin level <35 g/L is a powerful marker of increased risk for postoperative pulmonary complications and should be measured in all patients clinically suspected of having hypoalbuminemia 1
- The ALIAS trials demonstrated that high-dose albumin administration in acute ischemic stroke was associated with a six-fold higher rate of pulmonary edema in albumin-treated patients, highlighting the potential risk of albumin infusion 2
Clinical Evidence
- In patients with traumatic brain injury, mortality is higher when albumin is used for resuscitation, partly due to increased risk of pulmonary edema 2
- Hypervolemia to improve cerebral perfusion not only exacerbates the risk of cerebral edema but worsens outcomes because of increased extracerebral organ dysfunction, predominantly affecting the lungs 2
Risk Factors and Clinical Scenarios
- The risk of pulmonary edema is particularly high in patients with cirrosis receiving albumin infusions, as demonstrated in the ATTIRE trial 3
Management Considerations
- The American Thoracic Society suggests that intravenous albumin is not recommended for first-line volume replacement or to increase serum albumin levels in critically ill adult patients 4
- Albumin infusion is not recommended in conjunction with diuretics for removal of extravascular fluid in patients with hypoalbuminemia 4
Prevention Strategies
- Monitor fluid balance carefully in hypoalbuminemic patients to prevent fluid overload 5
- In ventilated ARDS patients with hypoalbuminemia, fluids should be administered cautiously since they may decrease oxygenation by increasing pulmonary edema 5
- A fluid conservative protocol is recommended for ARDS patients once shock is resolved, as this approach was associated with increased ventilator-free days 5