Management of Acute Fatty Liver of Pregnancy
Expedited delivery is the definitive treatment for acute fatty liver of pregnancy and must be performed once coagulopathy and metabolic derangements (particularly hypoglycemia) have been stabilized, with decisions made jointly by obstetricians, hepatologists, and the multidisciplinary team 1.
Immediate Assessment and Triage
Women with AFLP require rapid severity assessment using the Swansea criteria. Those who develop encephalopathy, elevated serum lactate (>2.8 mg/dL), MELD score >30, or score >7 on the Swansea criteria must be admitted to level 2 or 3 intensive care 1.
The Swansea criteria help confirm diagnosis and guide management decisions, though they have limitations in differentiating AFLP from other pregnancy-related liver diseases 2. Key distinguishing features include profound hypoglycemia and hyperammonemia, which are more specific to AFLP than HELLP syndrome 3.
Pre-Delivery Stabilization
Before proceeding to delivery, address the following critical metabolic and hematologic abnormalities:
- Correct hypoglycemia with continuous dextrose infusion - this is a hallmark of AFLP and requires aggressive management 3
- Correct coagulopathy with fresh frozen plasma, cryoprecipitate, and platelets as needed 1
- Manage acid-base disturbances and electrolyte abnormalities 1
- Monitor and treat hypertension if present, though this is less prominent than in HELLP syndrome
Delivery Planning
Delivery should be expedited once stabilization is achieved 1. The mode of delivery requires joint decision-making:
- Cesarean section is often required and may be associated with improved maternal and perinatal outcomes compared to vaginal delivery, though observational bias may affect these findings 1
- Rapid delivery after stabilization is the priority 1
- The focus is on maternal stabilization first, then immediate delivery planning 2
Post-Delivery Management
Intensive Care Support
Most patients require continued ICU-level care postpartum with:
- Strict monitoring of hepatic and renal function
- Continued correction of coagulopathy (typically resolves within 1-2 days post-delivery) 4
- Management of multiorgan dysfunction including acute kidney injury
- Monitoring for complications such as DIC, pancreatitis, and sepsis 5
Adjunctive Therapies
N-acetylcysteine can be considered in women requiring ICU admission, though there are no existing data specific to AFLP. However, benefits have been demonstrated in other causes of non-paracetamol-induced liver failure 1.
Plasma exchange post-delivery may be considered for severe hepatic impairment to improve disease severity and decrease recovery time, but this should only be performed in centers with expertise in plasma exchange in high-dependency settings 1.
Liver Transplantation Evaluation
Early referral to a transplant center is mandatory for women with severe hepatic impairment who may require transplantation, particularly those who do not improve clinically after delivery 2, 1. This is critical as AFLP can progress to fulminant liver failure despite delivery 5.
Expected Recovery Timeline
- Coagulopathy resolves within 1-2 days post-delivery 4
- Hepatic and renal function typically restore soon thereafter 4
- Complete recovery is expected in most cases with appropriate management 6, 7
Critical Pitfalls to Avoid
- Delaying delivery while attempting further medical optimization - delivery is the definitive treatment and should not be postponed once basic stabilization is achieved
- Misdiagnosing as HELLP syndrome - look for hypoglycemia and hyperammonemia as distinguishing features 3
- Failing to correct coagulopathy before delivery - this increases surgical bleeding risk significantly
- Not involving transplant services early - deterioration can be rapid and unpredictable 2
- Inadequate postpartum monitoring - multiorgan dysfunction often persists or worsens immediately after delivery before improvement begins 7
Multidisciplinary Team Composition
Essential team members include: obstetricians, hepatologists, intensivists, obstetric anesthesiologists, and hematologists, with transplant hepatology available for consultation 2, 1.