Gastrointestinal tract trauma
This briefing document provides a comprehensive synthesis of surgical techniques and anatomical considerations for managing traumatic injuries to the gastrointestinal (GI) tract, based on the clinical guidelines for trauma surgery.
Executive Summary
The management of traumatic gastrointestinal injuries requires a methodical approach centered on adequate visualization, control of contamination, and restoration of anatomical integrity. A midline laparotomy remains the standard of exposure, with specific positioning—such as the "taxi-cab hailing position" or lithotomy—utilized for complex multi-compartment or rectal injuries. Key takeaways include:
Stomach: Most injuries are secondary to penetrating trauma and can be managed with primary suture closure or stapled wedge resection, provided the posterior wall is thoroughly inspected by dividing the gastrocolic ligament.
Small Intestine: A methodical examination from the ligament of Treitz to the ileocecal valve is mandatory. Surgeons must be particularly vigilant for "bucket handle" mesenteric injuries and strive to preserve at least 100 cm of bowel to prevent short bowel syndrome.
Colon: Management follows a hierarchy of controlling hemorrhage, then contamination, followed by definitive repair. Primary repair is advocated for most non-destructive injuries, while diversion is reserved for cases with massive wall edema or poor tissue quality.
Rectum: Extra-peritoneal rectal injuries are often associated with pelvic fractures. Current standards prioritize diversion via loop colostomy for complex injuries, while historical practices like pre-sacral drainage and distal rectal washout are no longer recommended.
Pre-operative Preparation and Initial Access
Special Surgical Instruments
Successful trauma intervention requires specific instrumentation beyond a general laparotomy tray:
Fixed abdominal retractors (e.g., Bookwalter).
Both TA and GIA stapling devices.
Electrothermal bipolar vessel sealing systems (e.g., LigaSure).
Adequate lighting, specifically including a headlight for deep pelvic or esophageal exposure.
Patient Positioning
Standard: Supine position with arms abducted to 90 degrees.
Multi-compartment Injuries: A modified "taxi-cab hailing position" (supine with the injured hemithorax rotated 30° anteriorly) facilitates simultaneous laparotomy and thoracotomy.
Rectal Injuries: Lithotomy position is preferred to facilitate diagnostic sigmoidoscopy or transanal repair.
Incision Strategy
A midline laparotomy incision from xiphoid to pubic symphysis provides ideal exposure. In hypotensive patients, the abdomen should be entered using a three-stroke scalpel technique (skin, subcuticular tissue, then linea alba) to expedite access. Subcostal extensions may be required for complex hepatic or gastroesophageal (GE) junction injuries.
Management of Gastric and Distal Esophageal Injuries
Surgical Anatomy of the Stomach
The stomach’s blood supply is robust and redundant:
Lesser Curvature: Supplied by left and right gastric arteries.
Greater Curvature: Supplied by left and right gastroepiploic arteries.
Fundus: Supplied by short gastric arteries arising from the distal splenic artery.
Gastric Repair Principles
Most gastric injuries are identified during operative exploration. Because the stomach is redundant, primary suture closure (one or two layers) or stapled wedge resection is typically sufficient. A critical step is the division of the gastrocolic ligament to allow entrance into the lesser sac, ensuring the posterior wall is inspected for occult injuries.
Distal Esophageal Injuries
Exposure of the GE junction is challenging and can be improved by:
Placing the patient in reverse Trendelenburg.
Mobilizing the left lobe of the liver by dividing the triangular and gastrohepatic ligaments.
Dividing the diaphragmatic crura for maximal cranial exposure.
Repair: Simple injuries use absorbable 3-0 interrupted sutures. Larger injuries may require resection and re-anastomosis, often utilizing an EEA stapler inserted through an anterior gastrotomy.
Small Intestine Trauma
Anatomy and Assessment
The small intestine extends from the ligament of Treitz to the ileocecal valve. Its blood supply is derived from the superior mesenteric artery (SMA) within the mesentery. Perforations often occur at the antimesenteric border due to increased intraluminal pressure during blunt trauma.
Surgical Interventions
Systemic Examination: The entire circumference and length of the bowel must be visualized methodically.
Mesenteric Injuries: "Bucket handle" injuries (avulsion of the mesentery from the bowel) can lead to delayed necrosis due to impaired blood supply.
Resection vs. Repair:
All injuries should be closed in a transverse orientation to avoid narrowing the lumen.
If multiple injuries are present in a short segment, a single resection is preferable to multiple anastomoses.
Hand-sewn and stapled anastomoses show similar outcomes; however, hand-sewn is preferred in the presence of bowel edema.
Colonic and Rectal Trauma
The Colon
The colon is divided into four parts: ascending, transverse, descending, and sigmoid. Key surgical points include:
Mobilization: The white line of Toldt is incised to mobilize the colon. Care must be taken during splenic flexure mobilization to avoid avulsion of the splenic capsule.
Repair Strategy: Primary repair is the gold standard for non-destructive injuries. Resection is required if the injury encompasses >50% of the circumference or results in a devascularized segment.
Wound Closure: The skin should be left open following contaminated colonic surgeries due to the high risk of infection and fascial dehiscence.
The Rectum
The rectum is 15 cm long and largely extraperitoneal. Injuries are often secondary to bone fragments from pelvic fractures or high-energy gunshot wounds.
Diagnosis: Confirmed by digital rectal exam (presence of blood), proctoscopy, or CT showing suspicious missile trajectories.
Diversion Techniques: For complex injuries, a properly constructed loop colostomy is required. This involves:
Creating a "bridge" using a plastic rod placed through the mesocolon.
Alternatively, using a heavy horizontal mattress suture (silk 1) through the aponeurosis of the external oblique muscle and the mesocolon to achieve complete fecal diversion.
