Western Trauma Association Critical Decisions in Trauma: Diagnosis and management of duodenal injuries
Executive Summary
Duodenal injuries, while representing less than 2% of all abdominal injuries, present significant clinical challenges due to their complex anatomy, proximity to major vascular structures, and the presence of potent digestive enzymes. Approximately 80% of these injuries result from penetrating mechanisms. The management of duodenal trauma requires a nuanced approach based on the patient’s hemodynamic stability, the timing of the diagnosis, and the anatomic grade of the injury.
The primary goal of management is the achievement of a tension-free, well-vascularized repair. While simple primary repair is sufficient for the majority (55–85%) of cases, complex injuries (AAST Grades III–V) may require advanced reconstructive techniques, including Roux-en-Y duodenojejunostomy or pancreaticoduodenectomy. Historical diversion techniques, such as Berne’s diverticulization and pyloric exclusion, have largely fallen out of favor but remain options for highly individualized, tenuous cases. Patient outcomes are predominantly dictated by the presence of associated injuries and the timing of intervention rather than the specific anatomic grade of the duodenal injury itself.
Clinical Challenges and Pathophysiology
The duodenum's status as a primarily retroperitoneal structure provides relative protection but complicates diagnosis and recovery. The devastating nature of these injuries stems from three primary factors:
Anatomic Proximity: The duodenum lies near major vascular structures. Consequently, duodenal trauma is frequently accompanied by major vascular injuries and resultant hemorrhagic shock.
Physiologic Complexity: The intimate attachment to the pancreas often leads to combined pancreaticoduodenal injuries. The release of pancreatic enzymes into the retroperitoneum can cause severe necrosis and infection.
Healing Difficulties: Duodenal repairs have a higher failure rate than other intestinal segments. Failure can result in the leakage of up to 6 liters of gastric, biliary, and pancreatic juices daily, leading to massive fluid/electrolyte disturbances and nutritional depletion.
Diagnostic Pathways
Diagnosis generally follows one of three clinical scenarios, each requiring a different management strategy:
Note: CT scans may miss early hollow viscus injuries before periduodenal inflammation becomes apparent. In stable patients with suspicious CT findings (fluid or stranding), further evaluation with enteral contrast studies is mandated.
AAST Organ Injury Scale: Duodenum
The American Association for the Surgery of Trauma (AAST) scale is the standard for grading the severity of duodenal injuries.
Management Algorithms by Injury Grade
Initial Assessment and Stability
In patients with severe physiologic compromise (acidosis, coagulopathy, hypothermia), damage control is the priority. This involves:
Hemorrhage control.
Simple closure of the duodenum.
Bile duct ligation or external drainage.
Transfer to the ICU for resuscitation before definitive repair.
Grade I and II Injuries
Hematomas: Managed expectantly with nasogastric decompression and withholding oral intake. Nonoperative management is typically successful for up to 14 days. If obstruction persists, operative drainage is required.
Lacerations: Managed with simple, tension-free primary repair, preferably in a transverse orientation to prevent luminal narrowing.
Grade III and IV Injuries
These require more complex interventions if a simple primary repair is not feasible or creates tension:
Debridement: Edges must be debrided to healthy, bleeding tissue.
Roux-en-Y Duodenojejunostomy: Used if the defect is <50% of the circumference but cannot be closed without tension. This is considered a robust repair that tolerates moderate contamination.
Antrectomy and Billroth II Reconstruction: An alternative for proximal injuries (D1 or proximal D2) where the distal duodenum is closed.
Grade V Injuries
These are devastating injuries often involving the pancreatic head.
Whipple Procedure (Pancreaticoduodenectomy): Required if the pancreatic head is destroyed or the duodenum is non-reparable.
Surgical Strategy: It is prudent to perform damage control first, delaying reconstruction until the patient is physiologically optimized. Outcomes are significantly better in high-volume centers.
Ancillary and Historical Procedures
Duodenal Diversion
While once common, the routine use of diversion is now questioned and should be highly individualized.
Berne’s Duodenal Diverticulization: Involves primary repair, antrectomy, vagotomy, tube duodenostomy, and biliary drainage. It is largely of historical interest due to its complexity.
Pyloric Exclusion: Closing the pylorus through a gastrotomy combined with a gastrojejunostomy. While less disruptive than Berne's, its value is debated as the pylorus typically reopens spontaneously within three weeks.
Tube Duodenostomy: A method of decompression (lateral or end) used when inflammation or delayed presentation precludes other approaches.
Supportive Measures
Feeding Jejunostomy: Highly recommended to facilitate early enteral nutrition, which is proven to reduce septic complications. It also provides a distal feeding route in the event of a duodenal or pancreatic fistula.
Periduodenal Drains: Their use is debated. They are not recommended for Grade I or II injuries but should be considered when the repair is tenuous (Grades III–V) to create a controlled fistula in case of a leak.
Conclusion
The successful management of duodenal injuries hinges on early recognition and the application of tension-free surgical techniques. While the AAST grading system provides a useful anatomic framework, clinical decisions must be dictated by the patient's overall physiology and the presence of associated injuries. The two principal sources of morbidity following repair are duodenal fistula and obstruction. Simple primary repair remains the gold standard for the majority of patients, while complex reconstructions and damage control maneuvers are reserved for the most severe cases.
