Screening and diagnosis

Classification and risk stratification

Perioperative care

Quality improvement

Patient education

Nonpharmacologic interventions

Therapeutic procedures

Respiratory support

Follow-up and surveillance

Specific circumstances

Preventative measures

Medical management

Surgical interventions

Inpatient care

Diagnostic procedures

Diagnostic investigations

Insufficient evidence to make a recommendation.

Strongly favor this test or intervention.

The World Society of Emergency Surgery classification of liver trauma, also known as the WSES classification, is a clinical scoring system used to assess the severity of liver injuries. This calculator is applicable to patients who have experienced liver trauma, often due to blunt or penetrating injuries such as those sustained in motor vehicle accidents, falls, or assaults. 

The clinical utility of the WSES classification is to guide the management of liver injuries, helping clinicians decide between non-operative management, damage control surgery, or definitive surgery. It stratifies liver injuries into four grades based on the extent of damage, from minor lacerations to vascular injuries and liver avulsion. 

There are no specific exclusion criteria for the use of the WSES classification. However, it should be noted that this scoring system is primarily intended for use in the acute setting following trauma, and may not be applicable or useful in cases of chronic or degenerative liver conditions.

World Society of Emergency Surgery classification of liver trauma (WSES classification)

# Criteria
 ## Hemodynamic stability
A. Stable
B. Unstable
## AAST score
C. I
D. II
E. III
F. IV
G. V

# Conditions
- A and (C or D)
- A and E
- A and (F or G)
- B and (C or D or E or F or G)
- true

The calculator in question is the AAST (American Association for the Surgery of Trauma) Imaging Criteria for Classification of Liver Injury. This scoring system is used in the patient population that has sustained a liver injury, typically as a result of trauma. The AAST imaging criteria provide a standardized method to grade the severity of liver injuries based on imaging findings, usually from a computed tomography (CT) scan. 

The clinical utility of this calculator is to guide management decisions, including the need for surgical intervention, and to predict patient outcomes. It helps in stratifying the severity of liver injuries, which is crucial for determining the appropriate treatment approach and for communication among clinicians. 

There are no specific exclusion criteria for the use of the AAST imaging criteria for liver injury. However, it should be noted that this scoring system is primarily applicable in the setting of acute trauma and may not be as relevant or accurate in other causes of liver injury, such as chronic liver disease or non-traumatic acute liver injury.

AAST imaging criteria for classification of liver injury

# Criteria
 ## Classification
A. Subcapsular hematoma < 10% surface area; parenchymal laceration < 1 cm depth
B. Subcapsular hematoma 10-50% surface area; intraparenchymal laceration < 10 cm in diameter; parenchymal laceration 1-3 cm in depth and <= 10 cm length
C. Subcapsular hematoma > 50% surface area; ruptured subcapsular or parenchymal hematoma; intraparenchymal laceration > 10 cm in diameter; parenchymal laceration > 3 cm in depth; any injury in the presence of a liver vascular injury or active bleeding contained within liver parenchyma	 
D. Parenchymal disruption involving 25-75% of hepatic lobe; active bleeding extending beyond the liver parenchyma into the peritoneum
E. Parenchymal disruption > 75% of hepatic lobe; juxtahepatic venous injury to include retrohepatic vena cava and central major hepatic veins

# Conditions
- A
- B
- C
- D
- E
- true

Liver trauma

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