_PHLF is failure of the liver remnant to recover enough synthetic, excretory, and metabolic function to meet physiologic demand after liver resection._ --- ### Essential takeaway PHLF is not simply an elevated bilirubin or INR after hepatectomy. It occurs when the **functional capacity of the future liver remnant** is inadequate for the combination of: - Portal inflow - Metabolic demand - Operative injury - Postoperative complications The remnant may be too small, but volume is only part of the problem. A volumetrically adequate liver can still fail if it is steatotic, fibrotic, cholestatic, chemotherapy-injured, congested, ischemic, or exposed to severe systemic inflammation. Management has two parallel goals: 1. **Identify and correct reversible contributors** 2. **Support the patient while the remnant recovers** There is no established medication that reliably reverses PHLF. --- ### Definition The standard definition is the **International Study Group of Liver Surgery definition**: > Postoperative deterioration in the ability of the liver to maintain synthetic, excretory, and detoxification functions, characterized by increased INR and hyperbilirubinemia on or after POD5. Alternative causes of hyperbilirubinemia and coagulopathy should first be considered. |Grade|Meaning| |---|---| |**A**|Laboratory abnormalities without a change in management| |**B**|Requires deviation from routine postoperative care but no invasive treatment| |**C**|Requires invasive treatment or organ support| The grade is determined by **clinical consequence**, not simply the absolute bilirubin or INR. --- ### When should I worry? Some dysfunction is expected after a major hepatectomy. #### Often [[Approach to Hepatectomy#Expected postoperative trajectories|expected early]] - Transaminase elevation - Mild bilirubin rise - Transient INR elevation - Early lactate elevation that clears - Hypophosphatemia during regeneration These findings are more reassuring when they peak early and improve. #### Concerning for PHLF - Bilirubin continuing to rise after POD5 - INR failing to normalize or worsening - Persistent lactate elevation - Hypoglycemia - Progressive ascites - Encephalopathy - Acute kidney injury - Increasing vasopressor requirement - Sepsis - Respiratory or multiorgan failure >The **trajectory** is more important than any isolated value. --- ### When PHLF is suspected Do not assume every rising bilirubin is primary liver failure. First look for a correctable problem: - Hepatic artery compromise - Portal vein thrombosis - Hepatic venous outflow obstruction - Remnant congestion, torsion, or kinking - Biliary obstruction - Bile leak or biloma - Intra-abdominal sepsis - Hemorrhage or persistent shock Early Doppler ultrasound is reasonable, but postoperative studies may be limited. Use multiphase CT or CT angiography early when the patient is worsening or vascular anatomy is uncertain. MRCP, ERCP, or percutaneous cholangiography may be required when biliary obstruction remains a concern. --- ### Management priorities #### 1. Protect perfusion without creating congestion - Maintain adequate arterial pressure - Avoid persistent hypovolemia - Avoid indiscriminate fluid loading - Use vasopressors when appropriate - Reassess for hemorrhage, sepsis, or venous outflow obstruction The goal is adequate hepatic perfusion with low enough venous pressure to avoid remnant congestion. #### 2. Treat infection aggressively Sepsis both accompanies and accelerates PHLF. - Obtain cultures - Start appropriate antibiotics - Image early - Drain infected collections - Control bile leaks - Decompress an obstructed biliary system #### 3. Support renal function - Avoid nephrotoxins - Optimize perfusion - Treat infection - Monitor urine output closely - Consider early continuous renal replacement therapy when indicated Renal dysfunction is an important marker of severe disease. #### 4. Maintain metabolic support - Monitor glucose frequently - Treat hypoglycemia promptly - Follow lactate clearance - Prefer enteral nutrition - Avoid unnecessary protein restriction - Replace electrolytes thoughtfully #### 5. Manage ascites and encephalopathy - Use diuretics cautiously - Perform paracentesis for tense or symptomatic ascites - Replace albumin after large-volume paracentesis - Identify and treat precipitants of encephalopathy - Protect the airway when mental status deteriorates #### 6. Do not treat the INR alone An elevated INR does not reliably predict bleeding risk and does not protect against venous thrombosis. - Correct coagulopathy for active bleeding or selected procedures - Consider platelets, fibrinogen, and viscoelastic testing - Continue pharmacologic VTE prophylaxis unless clearly contraindicated --- ### Rescue strategies In progressive Grade C PHLF, early discussion with a specialized center is appropriate. Potential options include: - Somatostatin or octreotide for suspected portal hyperperfusion - Splenic artery embolization or other portal inflow modulation - Extracorporeal liver-support systems - Plasma exchange - Liver transplantation Evidence for most of these strategies after hepatectomy remains limited. They should not delay correction of vascular, biliary, or infectious complications. --- ### Practical framework When worried about PHLF, ask: 1. Is this expected postoperative dysfunction or failure to recover? 2. Does the patient meet ISGLS criteria? 3. Is there a correctable vascular, biliary, infectious, or mechanical problem? 4. Is the remnant small, congested, or experiencing portal hyperperfusion? 5. Are kidney, circulatory, pulmonary, or neurologic complications developing? 6. Does the patient need early transfer or transplant evaluation? --- ### References >[!quote]- Selected References >- Rahbari NN, Garden OJ, Padbury R, et al. Posthepatectomy liver failure: a definition and grading by the International Study Group of Liver Surgery. _Surgery_. 2011;149:713–724. [PubMed Link](https://pubmed.ncbi.nlm.nih.gov/21236455/) >- Qadan M, Garden OJ, Corvera CU, Visser BC. Management of postoperative hepatic failure. _J Am Coll Surg_. 2016;222:195–208. [PubMed Link](https://pubmed.ncbi.nlm.nih.gov/26705902/) >- Balzan S, Belghiti J, Farges O, et al. The “50-50 criteria” on postoperative day 5: an accurate predictor of liver failure and death after hepatectomy. _Ann Surg_. 2005;242:824–828. [PubMed Link](https://pmc.ncbi.nlm.nih.gov/articles/PMC1409891/) >- Mullen JT, Ribero D, Reddy SK, et al. Hepatic insufficiency and mortality in 1,059 noncirrhotic patients undergoing major hepatectomy. _J Am Coll Surg_. 2007;204:854–862. [PubMed Link](https://pubmed.ncbi.nlm.nih.gov/17481498/) >- Riddiough GE, Christophi C, Jones RM, Muralidharan V, Perini MV. Small-for-size syndrome after major hepatectomy and liver transplantation. _HPB_. 2020. [PubMed Link](https://pubmed.ncbi.nlm.nih.gov/31786053/)