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Classification of liver trauma

S B Rizoli¹, F D Brenneman, S S Hanna

¹Department of Surgery, Sunnybrook Health Science Centre, University of Toronto, Ontario, Canada.

HPB Surgery : a World Journal of Hepatic, Pancreatic and Biliary Surgery

|January 1, 1996

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The Organ Injury Scaling (OIS) system effectively categorizes liver trauma severity. This classification correlates with treatment needs, complications, and mortality, proving a valuable tool for trauma centers.

Area of Science:

Trauma Surgery
Surgical Outcomes
Injury Classification

Background:

Accurate classification of liver injuries is crucial for clinical practice, research, and quality assurance.
The American Association for the Surgery of Trauma's Organ Injury Scaling (OIS) Committee developed a scale for liver trauma in 1989.

Purpose of the Study:

To evaluate the applicability of the Organ Injury Scaling (OIS) system for liver trauma.
To assess the correlation between OIS grades and clinical outcomes in a Canadian trauma cohort.

Main Methods:

Retrospective review of 170 liver trauma patients managed at a single Canadian trauma center (January 1987 - June 1992).
Patients were categorized into the 6 established OIS grades for liver injury.
Analysis of correlations between OIS grade and blood transfusions, operative treatment, complications, and mortality.

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Main Results:

The OIS system successfully categorized all 170 patients into 6 grades.
Higher OIS grades showed significant correlation with increased blood transfusions, operative intervention magnitude, liver-related complications, and mortality.
OIS grade did not reliably predict the need for laparotomy or hospital length of stay.

Conclusions:

The Organ Injury Scaling (OIS) system is a practical and effective tool for classifying liver injuries.
The OIS demonstrates good correlation with key clinical outcomes, supporting its utility in trauma care.
The OIS has the potential to become a universally accepted classification scheme for liver trauma.