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Reconstruction of a traumatic duodenal transection with a pedicled ileal loop: a case report
© Kambaroudis et al; licensee BioMed Central Ltd. 2010
Received: 14 January 2010
Accepted: 26 October 2010
Published: 26 October 2010
Blunt duodenal injuries do not occur often. A patient with damage to the duodenal tissue around the pancreatic and common bile duct presents a challenge to surgeons. The choice of procedure must be tailored to the nature of the defect and the amount of tissue lost.
We describe the case of a 16-year-old Caucasian boy with a blunt duodenal injury after a motor vehicle accident. On admission, the patient had stable vital signs and a normal laboratory workup. Gradually his clinical condition deteriorated and a computed tomography scan showed a retroperitoneal haematoma at the level of his duodenum. A fully circumferential rupture of the second part of his duodenum was found during laparotomy, with the intact Vater's papilla lying adjacent to the defect and a superficial laceration of the head of his pancreas. The retroperitoneal haematoma was thoroughly drained and a pedicled ileal loop was interposed between the duodenal stumps to restore the continuity of the patient's duodenum. Apart from a mild postoperative pancreatitis, the patient's postoperative course evolved with no further problems. The patient was discharged on the 22nd postoperative day in excellent condition and has remained so to date (after five years).
In our case report, where the second part of the patient's duodenum was completely transected, our choices for reconstruction were limited. Important factors for the successful management of this patient were prompt surgical intervention and the accurate assessment of the nature of the duodenal and associated injuries. We believe that the technique we used was a reasonable choice because the anatomical continuity of the patient's duodenum was restored.
Patients with duodenal injuries represent approximately 4% of all patients with abdominal injuries from blunt trauma, usually resulting from motor vehicle accidents, which account for 22% of all patients with duodenal injuries . Due to the anatomical position of the duodenum, blunt duodenal trauma is usually associated with injuries to adjacent structures, including the pancreas, bile duct, mesenteric vessels, and inferior vena cava . As the diagnosis of a patient with a blunt duodenal injury is difficult, and even though there are many laboratory tests and radiological studies available, laparotomy with exploration of the retroperitoneal space remains the decisive diagnostic procedure . Delays in diagnosis and treatment result in increased morbidity and mortality, so early diagnosis is very important [3, 4].
An array of surgical techniques have been developed for the management of patients with duodenal injuries. The surgeon should choose the most efficient technique according to the type and seriousness of the patient's injury .
We describe our case report of a patient with a complete transection of the second part of his duodenum, resulting from a blunt abdominal injury. The surgical technique that was implemented is somewhat different from those that are usually described.
A 16-year-old Caucasian boy was brought to the emergency department of our hospital after a motor vehicle accident. According to the description of the accident, the young man was hurled from his motorcycle and hit an immobile obstacle, impacting on it with his anterior abdominal wall. He had no apparent external injuries. When he arrived at the hospital he was haemodynamically stable with a blood pressure reading of 120/80 mmHg, a heart rate of 88 pulses/minute and a Glasgow Coma Scale(GCS) score of 15. The patient experienced pain and tenderness on palpation of his right upper abdominal quadrant; the rest of his abdomen was soft and nontender to palpation.
Due to the patient's clinical condition worsening and the CT findings, we did not deem it necessary to perform an upper gastrointestinal endoscopy, and decided to proceed to an immediate exploratory laparotomy. The patient's peritoneal cavity was approached through a midline supra-umbilical incision. No solid organ bleeding or injury was found intraperitoneally. In the region of the head of the pancreas and the second part of the patient's duodenum, there was a retroperitoneal haematoma, which upon investigation was found to contain a fully circumferential rupture of the second part of the duodenum. There was also an apparently superficial rupture of the head of the patient's pancreas.
Both stumps of the patient's injured duodenum were dissected and Vater's papilla was found to be next to the distal stump. The major pancreatic duct was catheterised through the papilla of Vater and saline was injected to check for the presence of a rupture and none was found. The bile duct was also catheterised - as in the case of the pancreatic duct - but no rupture was found along it. Debridement of the stump edges followed, as far as was possible. Due to the position and the extent of the lesion, the risk of disrupting the blood supply of the remaining parts of the patient's duodenum was high and the option of restoration of the duodenal continuity with a primary end-to-end anastomosis was ruled out.
Due to its retroperitoneal location, injuries of the duodenum are uncommon . However, this location renders it inaccessible and consequently patients with injuries to the duodenum after a blunt abdominal trauma are diagnosed late, although more apparent injuries to other organs or vessels are addressed [3–5]. The duodenum is only mobile at the pylorus and its fourth part. It shares its blood supply with the pancreas and, if its relation to the bile duct is taken into account, the high difficulty in suturing or resecting a segment of the duodenum, especially when the traumatic lesion involves its second part , is easily apparent.
Disruption of the duodenum by blunt force can occur either by crushing the duodenum against the rigid vertebral column (as from a direct blow to the abdomen), from the impact of shearing forces (as may occur during falls) or bursting energy (as with a seat belt injury) [5, 6]. In our case, the most likely mechanisms of injury, based on the information from the site of the accident, were the effect of crushing and the impact of shearing forces.
Early diagnosis of a patient with a duodenal injury is critical and the time interval from injury to definite treatment influences morbidity and mortality from this injury. An 11% mortality rate in patients who underwent an operation less than 24 hours after an injury increases up to 40% in those who were operated on after 24 hours after being injured . Information about the mechanism of injury and physical examination may arouse suspicion for duodenal injury. However, the retroperitoneal location of the duodenum may preclude early manifestation of injury and physical examination may be misleading with vague findings. Retroperitoneal duodenal perforation is usually subtle on presentation, although tachycardia, right upper-quadrant tenderness, vomiting and a progressive rise in temperature and heart rate are common findings in patients with this presentation . When our patient was brought to the emergency room, he was haemodynamically stable, presenting with upper abdominal pain and tenderness on examination, and with haematemesis later on. Information about the mechanism of injury combined with the clinical findings aroused our suspicion of an intraabdominal organ injury; therefore, we proceeded promptly to the necessary laboratory and imaging studies.
A CT scan of the patient's abdomen with intraluminal and intravenous contrast is the diagnostic test of choice in stable patients with blunt abdominal trauma, and provides excellent anatomic detail of the retroperitoneum. However, CT scanning cannot always distinguish duodenal perforations from duodenal haematomas [9, 10]. In our case report, the deterioration of the patient's clinical status including haematemesis and the inherent high suspicion of abdominal injury indicated the investigation of the intraperitoneal and retroperitoneal space with a CT scan. Although the CT scan did not show any duodenal disruptions, its findings combined with the clinical findings and the history of the accident increased our suspicion of a possible retroperitoneal duodenal injury.
A combined injury of the pancreas and duodenum has been regarded as a separate category of injury, with a particularly high mortality . It has been suggested that even minor injuries to the pancreas increase rates of morbidity and mortality from associated duodenal injuries . However, pancreatic lacerations that do not involve the major pancreatic duct and that spare the bile duct appear to have lower rates of morbidity and mortality . In our case report, after investigation of the status of the patient's main pancreatic and bile ducts, we verified that the ducts were not involved.
Although a grading system has been devised to characterise duodenal injuries, it is less important than several simple aspects of the duodenal injury that better serve, from a practical point of view, the goal of definite treatment . These aspects are the anatomical relation of the injury to the ampulla of Vater, the characteristics of the injury (simple laceration versus destruction of the duodenal wall), the involved circumference of the duodenum, the associated injury to the biliary tract, pancreas or major vascular injury, and the time elapsed until the patient receives definite treatment . In our case report, these aspects were decisive for the characterisation of the patient's injury and surgical technique selection.
Several surgical techniques have been described for the adequate treatment of patients with duodenal injuries, according to location and type of injury. In our case report, where the second part of the patient's duodenum was completely transected, our choices for reconstruction were limited either to a primary end-to-end anastomosis or Roux-en-Y duodenojejunostomy with closure of the distal duodenal stump . A primary end-to-end anastomosis was ruled out because of the difficult mobilisation of the duodenum at that particular part. Also, performing an anastomosis subjected to undue tension could result in anastomotic dehiscence and development of fistulae, intraabdominal abscesses or duodenal obstruction, not to mention that such a repair would necessitate an additional gastrojejunostomy. Considering that the technique of pedicled mucosal graft, using jejunum , ileum  or stomach island flap , has been suggested as a method of closing large duodenal defects, we decided that the duodenal continuity would be better restored interposing an intact pedicled loop (15 cm long) between the duodenal stumps. With this technique the restoration of the duodenal continuity is more physiological (especially in a teenager with a still developing body), the diameter of the graft was the same with the duodenum, there was no undue tension at the anastomotic sites, and the repair was technically easier. Except for the mild pancreatitis, the patient presented with no other postoperative complications and was discharged on the 22nd postoperative day in excellent condition.
The most important factors for the successful management of the patient with duodenal injury were the short time interval between injury and operation (four hours), the meticulous exploration and drainage of the retroperitoneal haematoma, the assessment of the pancreatic rupture and the verification that no associated injuries to the pancreatic duct, common bile duct and Vater's papilla had occurred. The technique that we used restored the physiological anatomical continuity of the patient's duodenum.
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal. The patient was an adult at the time of submission (21 years old), when he signed the consent form.
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