Liver Laceration

The liver is the most commonly injured abdominal solid organ in both blunt and penetrating trauma. [1] The majority of injuries (80–90%) are low-grade (AAST I–III), and 85–90% of blunt liver injuries can be managed nonoperatively in hemodynamically stable patients, regardless of grade. [1-2] Management is driven primarily by hemodynamic status, not injury grade alone. [2]

• Mechanism of injury: motor vehicle collision (most common), falls, bicycle handlebar injuries, assault, penetrating trauma (stab wound, gunshot wound)
• Speed, seatbelt use, airbag deployment, steering wheel deformity, ejection from vehicle
• Direct blow or compression to the right upper quadrant/lower right chest
• Timing of injury and symptom onset
• Abdominal pain — location, severity, radiation (right shoulder pain = Kehr sign suggesting diaphragmatic irritation/hemoperitoneum)
• Lightheadedness, syncope, or near-syncope suggesting hemorrhage
• Associated injuries: rib fractures, pelvic fractures, other solid organ injuries
• Anticoagulant/antiplatelet use (increases bleeding risk)
• Last oral intake (relevant for potential operative management)

• Hemodynamic instability: SBP <90 mmHg, HR >120 bpm, poor capillary refill, altered mental status [2]
• Signs of peritonitis (diffuse abdominal rigidity, rebound, guarding) — mandate emergent laparotomy [3]
• Rapidly expanding abdominal distension
• Persistent tachycardia despite fluid resuscitation (transient responder or non-responder)
• Ongoing transfusion requirement (>4 units pRBC in 24 hours is a predictor of NOM failure) [4]
• Kehr sign (left shoulder pain from diaphragmatic irritation by hemoperitoneum)
• Signs of hemorrhagic shock (Class III/IV)

• Relevant contributors: Anticoagulants (warfarin, DOACs) and antiplatelets (aspirin, clopidogrel) increase hemorrhage risk and may lower threshold for intervention
• Acute treatment:
  • Tranexamic acid (TXA) — administer within 3 hours of injury per CRASH-2 protocol (1 g IV bolus then 1 g over 8 hours)
  • Massive transfusion protocol activation when indicated (1:1:1 ratio pRBC:FFP:platelets)
  • Reversal agents for anticoagulants as appropriate (4-factor PCC for warfarin, idarucizumab for dabigatran, andexanet alfa for factor Xa inhibitors)
• Avoid: NSAIDs in the acute setting (platelet dysfunction, renal injury risk in hypovolemia)
• Pain management: Acetaminophen should be used cautiously given hepatic injury; opioids are the mainstay for acute pain control

• NPO on presentation — anticipate potential operative intervention or angiography
• Resume diet as tolerated once hemodynamically stable and operative management is not anticipated
• No specific long-term dietary restrictions related to liver laceration itself
• Avoid alcohol during recovery to minimize hepatic stress

• Cardiovascular: Lightheadedness, syncope, palpitations (hemorrhage)
• Respiratory: Dyspnea, pleuritic chest pain (associated hemothorax, diaphragmatic injury, right lower lobe atelectasis)
• GI: Nausea, vomiting, hematemesis or melena (hemobilia from pseudoaneurysm rupture is a delayed complication) [5]
• GU: Hematuria (concomitant renal injury)
• Neurologic: Altered mental status (hemorrhagic shock or concomitant head injury)
• MSK: Rib pain, pelvic pain (associated fractures)

• Witnesses or EMS report of mechanism, estimated blood loss at scene, extrication time
• Pre-hospital vitals and interventions (fluids, blood products)
• Prior abdominal surgeries (adhesions may complicate operative management)
• Bleeding disorders or family history of coagulopathy
• Hepatic comorbidities: cirrhosis, hepatic steatosis (increased friability and bleeding risk)
• Social context: alcohol use, substance use (may affect exam reliability and hepatic reserve)

• Blunt trauma: MVC, falls, sports injuries, bicycle handlebar injuries (especially pediatric)
• Penetrating trauma: Stab wounds, gunshot wounds — penetrating injuries are more likely to require operative/endoscopic/percutaneous procedures [6]
• Pre-existing hepatomegaly (hepatitis, malignancy, congestion) increases susceptibility
• Cirrhosis/steatosis: Increased parenchymal friability and coagulopathy
• Anticoagulant/antiplatelet therapy
• Age >55 years (historically considered a risk factor, though no longer an absolute contraindication to NOM) [3]
• ISS >34 and transfusion >4 units pRBC are predictors of NOM failure [4]

• Splenic laceration/rupture — left-sided mechanism, Kehr sign, similar hemodynamic presentation
• Renal injury — flank pain, hematuria
• Hollow viscus injury (bowel perforation) — peritonitis, free air on imaging; incidence increases with multiple solid organ injuries [3]
• Mesenteric/omental injury — hemoperitoneum without solid organ injury on CT
• Diaphragmatic rupture — especially right-sided, may coexist with liver injury
• Retroperitoneal hemorrhage (pelvic fracture, aortic injury)
• Rib fractures with intercostal artery bleeding — right lower rib fractures commonly associated with liver injury
• Adrenal hemorrhage — right-sided, may mimic perihepatic hematoma on CT

• Prior abdominal trauma or surgery
• Known liver disease (cirrhosis, hepatitis, steatosis) — affects parenchymal integrity and coagulation
• Coagulopathy or bleeding disorders
• Splenectomy (alters differential for hemoperitoneum)
• Chronic anticoagulation
• Prior angioembolization (altered hepatic arterial anatomy)

• Vitals: Tachycardia, hypotension, tachypnea — signs of hemorrhagic shock; ATLS defines unstable as SBP <90, HR >120 with skin vasoconstriction and altered consciousness [2]
• Inspection: Seatbelt sign across RUQ/chest, abrasions, ecchymosis (Grey Turner, Cullen signs are late findings)
• Palpation: RUQ tenderness, guarding, rigidity; diffuse peritonitis mandates laparotomy [3]
• Percussion: Dullness in flanks (hemoperitoneum)
• Auscultation: Decreased breath sounds right base (associated hemothorax/diaphragmatic injury)
• Lower right rib tenderness: Fractures of ribs 9–12 on the right are strongly associated with liver injury
• Rectal exam: Assess for melena (delayed hemobilia)
• Serial exams are critical during NOM — any change in abdominal pain pattern or new peritonitis warrants reassessment [3]

• CBC with serial hemoglobin — cornerstone of NOM monitoring; unexplained Hgb drop prompts repeat imaging [3]
• Type and screen/crossmatch — essential; activate MTP if indicated
• Comprehensive metabolic panel including hepatic function
• AST/ALT: Grossly elevated transaminases (AST >200, ALT >80–100) are strongly associated with liver laceration and should prompt CT imaging. Combined AST >100 + ALT >80 + WBC >10,000 yields ~90% sensitivity and 92% specificity for liver laceration [7-8]
• Coagulation studies (PT/INR, PTT, fibrinogen) — assess for coagulopathy and guide resuscitation
• Lactate — marker of tissue hypoperfusion/shock
• ABG/VBG — assess base deficit (marker of shock severity)
• Lipase — evaluate for concurrent pancreatic injury

• E-FAST (Extended Focused Assessment with Sonography for Trauma): Rapid bedside detection of intra-abdominal free fluid; first-line in hemodynamically unstable patients (GoR 1A). Sensitivity is limited (42–52% in pediatrics); a negative FAST does not exclude liver injury [5]
• CT abdomen/pelvis with IV contrast: Gold standard in hemodynamically stable patients (sensitivity/specificity 96–100%). Identifies laceration grade, hemoperitoneum volume, active contrast extravasation ("blush"), pseudoaneurysm, and associated injuries [5][9]
  • Delayed-phase CT helps differentiate active bleeding from contained vascular injuries [5]
  • Arterial blush on CT is an indication for angiography/embolization consideration [3]
• Routine follow-up CT is NOT recommended — repeat imaging only for clinical deterioration (fever, increasing pain, Hgb drop, jaundice, SIRS). Surveillance imaging in asymptomatic patients has a 0% complication detection rate vs. 39% when prompted by clinical deterioration [5][10]
• Ultrasound: Useful for follow-up assessment of bilomas in grade IV–V injuries [2]

• AAST Organ Injury Scale (OIS)[4][11]
• WSES Classification: Integrates AAST grade with hemodynamic status — Minor (WSES I = AAST I–II, stable), Moderate (WSES II = AAST III, stable), Severe (WSES III = AAST IV–V, stable; WSES IV = any grade, unstable) [5]
• Diagnostic peritoneal lavage (DPL): Largely replaced by FAST/CT but may be used in resource-limited settings
• Angiography: Both diagnostic and therapeutic; indicated for contrast blush on CT or ongoing hemorrhage [3][12]
• ERCP: For biliary complications (bile leak, hemobilia, biliary fistula) [2][5]

The following figure illustrates the probability of hepatic complications based on injury grade and 24-hour pRBC transfusion volume, a useful risk stratification tool:

• ECG is part of standard trauma workup
• Evaluate for sinus tachycardia (hemorrhage), arrhythmias (electrolyte derangements from massive resuscitation)
• Rule out myocardial contusion in high-energy blunt chest/abdominal trauma (ST changes, new bundle branch block)
• Pulseless electrical activity (PEA) in the setting of massive hemoperitoneum or tension pneumothorax

• Severity stratification is based on AAST grade AND hemodynamic status, not grade alone [2]
• 80–90% of liver injuries are grade I–III (minor); 12–20% are grade IV–V [1]
• Overall mortality is ~5%; mortality after operative management for severe injuries reaches 30–68% [14-15]
• Complications occur in 12–14% of high-grade injuries managed nonoperatively and include: [2][5]
  • Delayed hemorrhage/pseudoaneurysm rupture (1.7–5.9%)
  • Biliary complications (bile leak, biloma, hemobilia, biliary fistula) — up to 30%
  • Hepatic abscess (0–7%)
  • Abdominal compartment syndrome
  • Hepatic necrosis (especially post-angioembolization)

Initial Stabilization

• ATLS primary and secondary survey
• Large-bore IV access, massive transfusion protocol if indicated (1:1:1 pRBC:FFP:platelets)
• TXA within 3 hours of injury
• Correct hypothermia, acidosis, coagulopathy (lethal triad)

Nonoperative Management (NOM) — standard of care for hemodynamically stable patients [3][5]

• Serial clinical exams, hemoglobin monitoring q4–6h initially
• ICU admission for AAST grade III–V injuries [5]
• Floor admission may suffice for grade I–II injuries
• Angiography with embolization for arterial blush on CT in stable patients [3][12]
• An observation-first strategy (even with CT blush) is safe and effective in stable patients, with only 14% requiring delayed intervention; empiric angioembolization is associated with higher complication rates (abscess, biloma) [16]

Operative Management — indicated for: [3][5]

• Hemodynamic instability/non-responders (WSES grade IV)
• Diffuse peritonitis
• Failed NOM
• Operative strategy: "6 Ps" — Push, Pack, Pringle, Put Back, Phone, Pivot [1]
  • Perihepatic packing and damage control surgery are first-line
  • Major hepatic resections should be avoided initially [5]
  • REBOA may serve as a bridge in unstable patients [5]

Complications Management [5]

• Delayed hemorrhage → angioembolization first-line
• Pseudoaneurysm → angioembolization to prevent rupture
• Abscess → percutaneous drainage
• Biloma → percutaneous drainage ± ERCP with stenting
• Biliary fistula → laparoscopic lavage/drainage + endoscopic stenting

• Emergent OR: Hemodynamic instability, non-responder to resuscitation, peritonitis [3][5]
• ICU admission: AAST grade III–V injuries undergoing NOM; transient responders; patients requiring close hemodynamic monitoring, serial exams, and immediate OR availability [5]
• Floor/step-down: Hemodynamically stable grade I–II injuries without other significant injuries
• Transfer to higher level of care: If facility lacks ICU monitoring, angiography capability, immediate OR access, or blood bank resources. Notably, 92% of transferred patients undergo NOM and only 3.4% fail NOM [5][15]
• Discharge: Once hemodynamically stable, tolerating diet, pain controlled, hemoglobin stable, and no evidence of complications

Specialist consultation triggers

• Trauma surgery — all liver lacerations
• Interventional radiology — arterial blush on CT, ongoing hemorrhage amenable to embolization
• Hepatobiliary surgery — complex biliary injuries, hepatic necrosis
• Gastroenterology/ERCP — biliary complications (bile leak, hemobilia)

• Follow-up timing: Outpatient trauma surgery follow-up within 1–2 weeks of discharge; repeat labs (CBC, LFTs) as clinically indicated
• Routine follow-up imaging is NOT necessary — imaging should be driven by clinical symptoms [5][10]
• Most liver lesions heal within approximately 4 months [5]
• Patients may resume normal physical activities after 3–4 months for moderate-to-severe injuries [5]
• Activity restrictions: Avoid contact sports and heavy lifting during recovery; duration depends on injury grade

Return precautions — instruct patients to return immediately for: [5]

• Increasing abdominal pain
• Lightheadedness, dizziness, or fainting
• Nausea or vomiting
• Fever or chills
• Dark/tarry stools or vomiting blood (hemobilia)
• Jaundice
• Patients should not remain alone for extended periods during recovery [5]

1. Liver Injury: What You Need to Know. — Reed CR, Brown JB, Peitzman AB. The Journal of Trauma and Acute Care Surgery. 2025.

2. WSES Classification and Guidelines for Liver Trauma. — Coccolini F, Catena F, Moore EE, et al. World Journal of Emergency Surgery : WJES. 2016.

3. Nonoperative Management of Blunt Hepatic Injury: An Eastern Association for the Surgery of Trauma Practice Management Guideline. — Stassen NA, Bhullar I, Cheng JD, et al. The Journal of Trauma and Acute Care Surgery. 2012.

4. Non-Operative Management Versus Operative Management in High-Grade Blunt Hepatic Injury. — Cirocchi R, Trastulli S, Pressi E, et al. The Cochrane Database of Systematic Reviews. 2015.

5. Liver Trauma: WSES 2020 Guidelines. — Coccolini F, Coimbra R, Ordonez C, et al. World Journal of Emergency Surgery : WJES. 2020.

6. The American Association for the Surgery of Trauma (AAST) Liver Injury Grade Does Not Equally Predict Interventions in Blunt and Penetrating Trauma. — Brigode W, Adra A, Capron G, et al. World Journal of Surgery. 2022.

7. Combination of White Blood Cell Count With Liver Enzymes in the Diagnosis of Blunt Liver Laceration. — Lee WC, Kuo LC, Cheng YC, et al. The American Journal of Emergency Medicine. 2010.

8. Hepatic Enzymes Have a Role in the Diagnosis of Hepatic Injury After Blunt Abdominal Trauma. — Tan KK, Bang SL, Vijayan A, Chiu MT. Injury. 2009.

9. Hepatobiliary Trauma Imaging Update. — Stephens J, Yu HS, Uyeda JW. Radiologic Clinics of North America. 2022.

10. Surveillance Imaging Following Liver Trauma Has a Low Detection Rate of Liver Complications. — Fischer N, Bartlett A. Injury. 2022.

11. Grading Abdominal Trauma: Changes in and Implications of the Revised 2018 AAST-OIS for the Spleen, Liver, and Kidney. — Dixe de Oliveira Santo I, Sailer A, Solomon N, et al. Radiographics : A Review Publication of the Radiological Society of North America, Inc. 2023.

12. Society of Interventional Radiology Position Statement on Endovascular Intervention for Trauma. — Padia SA, Ingraham CR, Moriarty JM, et al. Journal of Vascular and Interventional Radiology : JVIR. 2020.

13. Risk Factors for Hepatic Morbidity Following Nonoperative Management: Multicenter Study. — Kozar RA, Moore FA, Cothren CC, et al. Archives of Surgery. 2006.

14. Management of Severe Blunt Hepatic Injury in the Era of Computed Tomography and Transarterial Embolization: A Systematic Review and Critical Appraisal of the Literature. — Melloul E, Denys A, Demartines N. The Journal of Trauma and Acute Care Surgery. 2015.

15. Contemporary Epidemiologic Overview of Adult Liver Trauma Management Across the United States: Analysis of the American College of Surgeons Trauma Quality Improvement Program Database. — Obaid O, Torres-Ruiz T, Rady E, et al. Surgery. 2025.

16. An Observation-First Strategy for Liver Injuries With "Blush" on Computed Tomography Is Safe and Effective. — Samuels JM, Carmichael H, McIntyre R, et al. The Journal of Trauma and Acute Care Surgery. 2023.