急诊床旁超声在腹部脏器闭合性损伤诊断中的应用价值

目的 探讨急诊床旁超声检查对腹部闭合性损伤的诊断应用价值.方法 应用便携式超声仪对184例外伤患者行急诊床旁超声检查,观察腹部脏器声像图有无异常改变,并重视观察腹腔内有无游离液体及气体.结果 超声诊断总符合率91.8%(169/184),其中单脏器损伤156例,符合率95.5%(149/156),多脏器损伤28例,符合率71.4%(20/28),漏诊21例,误诊3例,漏、误诊率13%(24/184).手术治疗119例;保守治疗65例,经CT、MRI检查及临床保守治疗证实.结论 急诊床旁超声检查对腹部闭合性损伤的诊断符合率高,为临床提供迅速、可靠的诊断信息.     

A case of acute abdominal aortic dissection caused by blunt trauma

We present the case of an 18-year-old man involved in a fall with blunt abdominal trauma. The patient had hypovolemic shock and findings of an acute abdomen. Initial computed tomography (CT) showed pulmonary contusion, pneumohemothorax, hemoperitoneum, hepatic contusion, right kidney laceration and vascular avulsion, rupture of the mesenteric vein, rupture of the right rectus muscle with bowel hernia, and infrarenal aortic dissection. There were no signs of limb or medullar ischemia. After hemodynamic stabilization and surgical repair of the associated lesions, the dissection was successfully treated with a self-expanding aortic Wallstent. Postprocedure CT showed a well-positioned patent stent and the patient was discharged asymptomatic. Percutaneous endovascular stent implantation is minimally invasive and seems to be a safe treatment for traumatic dissection of the abdominal aorta.     

Thin-slice CT findings of biliary stricture due to blunt abdominal trauma: reports of three cases

Thin-slice CT findings were reviewed in three patients with biliary stricture due to blunt abdominal trauma. In all cases, the stricture was located at the suprapancreatic portion of the common bile duct. Central enhancement with a low attenuation rim at the bile duct between the stricture and the papilla of Vater was apparent in all cases. Ancillary findings such as focal renal laceration (1 case) and left rib fracture (1 case) were also seen. These CT findings may help in the diagnosis of biliary injury for patients with blunt abdominal trauma.     

CT evaluation of pediatric abdominal trauma: pitfalls and quandaries

CT of the pediatric abdomen after blunt trauma has become a widely accepted technique for evaluation of hepatic and splenic injury. However, detection of hollow viscus and pancreatic injury remains challenging and controversial. Detection of bowel rupture (extravasated oral contrast, bowel discontinuity), pancreatic injury (laceration, separation of fragments) and bladder rupture may be difficult, particularly with inadequate technique and lack of vigilance. This article reviews findings associated with several injuries which may present diagnostic pitfalls as well as technical factors relating to the administration of enteric contrast and CT cystography.     

CT in the diagnosis of renal trauma

Computed tomography (CT) is frequently employed as the initial diagnostic study in patients with known or suspected renal trauma, especially in large trauma centers where multiple-system injuries are common. In our 3-year experience, which encompasses over 2,500 CT scans for abdominal trauma, the following traumatic renal lesions were identified: renal contusion, small and large subcapsular hematomas, laceration, complete laceration, ureteropelvic junction disruption, fractured kidney, shattered kidney with and without an intact renal capsule, renal vein injury, renal artery thrombosis, avulsion, and trauma to the abnormal kidney. The CT findings and clinical features and management of each lesion are reviewed.     

Urogenital trauma: imaging upper GU trauma

OBJECTIVES: This article will define the current controversies and concepts in the classification, clinical presentation, imaging approaches and management of upper urinary tract trauma. MATERIALS AND METHODS, RESULTS: This review will include the experience of the authors in the field of renal trauma over a 32-year period. Current thinking accepts the view that significant renal trauma is generally present when there is gross hematuria, signs of shock, or other clinical signs of severe injury. In most patients, suspected renal injury will be evaluated as a part of the overall assessment of the patient for suspected intraperitoneal injury. The authors will stress some exceptions to the rule. CONCLUSIONS: Most trauma experts now advocate conservative management, unless the patient is unstable or a renal vascular thrombosis or avulsion is suspected. Similarly, penetrating trauma to the kidney in and of itself no longer requires mandatory surgery. In the United States, computed tomography (CT), especially spiral CT, is considered the best diagnostic study, if available. Intravenous pyelography (IVP) is adequate if this is the only imaging modality available and if no concomitant injuries to the abdominal structure are suspected. Ultrasound, although strongly advocated in some countries, can lead to some significant false negatives. The diagnosis and management of unusual problems such as the traumatic AV fistula, the patient with an absent kidney or injury to the congenitally abnormal kidney, the serendipitous renal tumor in a patient with trauma, or serious bleeding after an apparent minor injury (i.e., spontaneous hemorrhage) are also reviewed in this article.     

急诊床旁超声在腹部脏器闭合性损伤诊断中的应用价值

目的 探讨急诊床旁超声检查对腹部闭合性损伤的诊断应用价值.方法 应用便携式超声仪对184例外伤患者行急诊床旁超声检查,观察腹部脏器声像图有无异常改变,并重视观察腹腔内有无游离液体及气体.结果 超声诊断总符合率91.8%(169/184),其中单脏器损伤156例,符合率95.5%(149/156),多脏器损伤28例,符合率71.4%(20/28),漏诊21例,误诊3例,漏、误诊率13%(24/184).手术治疗119例;保守治疗65例,经CT、MRI检查及临床保守治疗证实.结论 急诊床旁超声检查对腹部闭合性损伤的诊断符合率高,为临床提供迅速、可靠的诊断信息.     

CT diagnosis of cardiac and pericardial injuries

The purpose of this retrospective study was to determine the CT findings diagnostic of cardiac and pericardial injury, including signs of pericardial tamponade, in patients suffering from blunt and penetrating trauma. A search of the CT radiology database at a level I trauma center was performed to identify cases in which injury to the heart or pericardium was diagnosed, as well as to identify cases of pericardial tamponade. All cases were reviewed to ascertain the specific CT findings, and medical records were reviewed to assess the influence of CT findings on management and to assess for clinical evidence of pericardial tamponade. Eighteen patients had direct CT evidence of cardiac or pericardial injury, including nine cases of pneumopericardium, eight cases of hemopericardium, and one case of intrapericardial gastric herniation. Four of these patients were found to have direct cardiac injuries. Three additional cases with CT evidence of pericardial tamponade were identified, two secondary to cardiac compression by an anterior mediastinal hematoma and one following repair of left ventricular rupture. Of 11 patients with CT evidence of tamponade, only three were suspected clinically. Cardiac and pericardial injuries are usually diagnosed surgically and are often clinically unsuspected, particularly in blunt trauma. As CT is increasingly utilized as a general screening test for thoracic/abdominal trauma, these injuries may be first suspected on the basis of CT findings, and knowledge of the CT findings of cardiac injury or tamponade is crucial.     

急诊床旁超声在腹部脏器闭合性损伤诊断中的应用价值

目的 探讨急诊床旁超声检查对腹部闭合性损伤的诊断应用价值.方法 应用便携式超声仪对184例外伤患者行急诊床旁超声检查,观察腹部脏器声像图有无异常改变,并重视观察腹腔内有无游离液体及气体.结果 超声诊断总符合率91.8%(169/184),其中单脏器损伤156例,符合率95.5%(149/156),多脏器损伤28例,符合率71.4%(20/28),漏诊21例,误诊3例,漏、误诊率13%(24/184).手术治疗119例;保守治疗65例,经CT、MRI检查及临床保守治疗证实.结论 急诊床旁超声检查对腹部闭合性损伤的诊断符合率高,为临床提供迅速、可靠的诊断信息.     

Serial aortography assesses stability of “Atypical” aortic arch ruptures

The victim of a high speed motor vehicle accident sustained an ascending aortic laceration as well as avulsion of the left subclavian artery. Initial management of the tears was conservative. The case is typical of “atypical” aortic arch tears except that the patient survived without emergent surgery. Serial aortography proved useful in assessing stability of the tears, providing opportunity to observe the natural history of these injuries angiographically. The distribution of aortic arch injuries following blunt trauma is reviewed.     

Imaging of renal trauma

Trauma is a major cause of death and disability and renal injuries occur in up to 10% of patients with significant blunt abdominal trauma. Patients with penetrating trauma and hematuria, blunt trauma with shock and hematuria, or gross hematuria warrant imaging of the urinary tract specifically and CT is the preferred modality. If there is significant perinephric fluid, especially medially, or deep laceration, delayed images should be obtained to evaluate for urinary extravasation. Most renal injuries are minor, including contusions, subcapsular and perinephric hematoma, and superficial lacerations. More significant injuries include deep lacerations, shattered kidney, active hemorrhage, infarctions, and vascular pedicle and UPJ injuries. These injuries are more likely to need surgery or have delayed complications but may still often be managed conservatively. The presence of urinary extravasation and large devitalized areas of renal parenchyma, especially with associated injuries of intraperitoneal organs, is particularly prone to complication and usually requires surgery. Active hemorrhage should be recognized because it often indicates a need for urgent surgery or embolization to prevent exsanguination.     

Trauma of the chest

Trauma to the chest may cause a wide range of injuries including fractures of the thoracic skeleton, contusion or laceration of pulmonary parenchyma, damage to the tracheobronchial tree, diaphragmatic rupture or cardiac contusion. Conditions affecting primarily extrathoracic sites may have indirect effects on the lungs causing adult respiratory distress syndrome or fat embolism. Laceration of the aorta is the typical and likewise most life threatening complication of massive blunt chest trauma necessitating immediate diagnosis and repair.Conventional radiography rather than cross-sectional imaging is the mainstay in diagnosing thoracic trauma. During the critical phase with often concomitant shock, pelvic and spinal injuries tailored radiographic views or even upright chest radiographs are impractical. The severely traumatized patient is usually radiographed in the supine position and suboptimal roentgenograms may have to be accepted for several reasons. It is well documented that many abnormalities detected on CT were not apparent on conventional radiographs, but CT is reserved for hemodynamical stable patients. Nevertheless certain situations like aortic rupture require further evaluation by CT and aortography.The value of conventional radiography, CT, MRI and aortography in chest trauma is reviewed and typical radiographic findings are presented.     

MRI evaluation of acute renal trauma

We describe the MR findings in a patient with acute renal injury after blunt abdominal trauma associated with perinephric hematoma and urinoma. Both CT and MR findings are described. Active urine extravasation into a perinephric urinoma is demonstrated by serial post-contrast imaging with CT and MRI showing progressively increased attenuation/signal intensity fluid in communication with the collecting system, commencing 2 minutes after contrast administration.     

Patterns of diagnostic error in trauma abdominal CT

Objective: To define patterns of diagnostic error in the interpretation of trauma abdominal CT. Materials and methods: Two hundred fifty-four out of 1751 abdominal CT scans performed for evaluation of trauma had a definite or equivocal diagnosis of an abdominal injury. Cases were re-read initially without reference to the original reports, in which 44 potential diagnostic errors were identified. A panel of two or three expert readers reviewed each of the 44 cases along with the original report to evaluate the diagnostic error and to search for patterns among the errors. Results: Thirty-one of the 254 CT scans (12%) that were re-read contained non-trivial mistakes that could affect patient outcome. Seventeen were false negative and 14 were false positive. Diagnostic errors were found in the liver, spleen, kidney, retroperitoneum, and peritoneal cavity. Patterns of false-negative diagnosis included missed vascular contrast extravasation, missed hemoperitoneum, and missed right retroperitoneal hematoma. Patterns of false-positive diagnosis included: periportal edema or blood tracking, called a liver laceration; respiratory motion, called a splenic or renal injury; and linear or round lucencies in the spleen or liver, called a laceration. Conclusion: Diagnostic errors in interpreting trauma abdominal CT cluster in several recurring patterns. Awareness of these patterns may assist readers in avoiding future errors. Electronic Publication     

Imaging of blunt pancreatic trauma

Blunt pancreatic trauma is an exceedingly rare but life-threatening injury with significant mortality. Computed tomography (CT) is commonly employed as the initial imaging modality in blunt trauma patients and affords a timely diagnosis of pancreatic trauma. The CT findings of pancreatic trauma can be broadly categorized as direct signs, such as a pancreatic laceration, which tend to be specific but lack sensitivity and indirect signs, such as peripancreatic fluid, which tend to be sensitive but lack specificity. In patients with equivocal CT findings or ongoing clinical suspicion of pancreatic trauma, magnetic resonance cholangiopancreatography (MRCP) may be employed for further evaluation. The integrity of the main pancreatic duct is of crucial importance, and though injury of the duct may be strongly suggested upon initial CT, MRCP provides clear delineation of the duct and any potential injuries. This article aims to review and illustrate the CT and magnetic resonance imaging findings of blunt pancreatic trauma and delineate the integration of these modalities into the appropriate imaging triage of severely injured blunt trauma patients.     

Blunt pancreatic trauma in children: CT diagnosis.

The purpose of this study is to determine the efficacy of CT in the diagnosis of pancreatic injury after blunt abdominal trauma in children. Pancreatic injury was diagnosed at surgery, at autopsy, or on the basis of the development of clinical pancreatitis or a pseudocyst on follow-up imaging evaluation in 18 of 1045 consecutive children examined with CT after blunt trauma. Types of pancreatic injury included laceration in 11 children, transection in two, contusion in one, and tumor with hemorrhage in one. Three children had clinical pancreatitis without a pancreatic abnormality noted on CT. The pancreatic injury was prospectively identified on CT in 12 children (67%). The presence of fluid in the lesser sac was a useful marker for injury to the pancreas. This was noted in 13 children with pancreatic injury, whereas it was observed in only six (1%) of 1028 children in the absence of pancreatic injury (sensitivity, 72%; specificity, 99%). Fluid in the anterior pararenal space was less helpful in establishing the diagnosis of pancreatic injury (sensitivity, 44%; specificity, 98%). A pancreatic pseudocyst developed in four of the 11 survivors. Our experience shows that direct signs of pancreatic trauma may be difficult to identify on CT. Recognition of the limitations of CT diagnosis of pancreatic injury is important in helping to reduce errors of interpretation.     

Computed tomography of blunt trauma to the gallbladder

The CT findings are reviewed in two patients with injuries to the gallbladder following blunt abdominal trauma. In one patient with a laceration of the cystic artery a large intraluminal clot was identified within the gallbladder associated with extensive hemoperitoneum. Another patient presented with extensive bile leakage into the peritoneal cavity 72 h after blunt trauma due to laceration of the fundus of the gallbladder. The clinical features of blunt trauma to the gallbladder and the utility of CT in this entity are reviewed.     

Computed tomography in hepatic trauma

Twenty-five patients with hepatic injury from blunt upper abdominal trauma were examined by computed tomography (CT). The spectrum of CT findings was recorded, and the size of the hepatic laceration and the associated hemoperitoneum were correlated with the mode of therapy used in each case (operative vs. nonoperative). While the need for surgery correlated roughly with the size of the hepatic laceration, the size of the associated hemoperitoneum was an important modifying factor. Fifteen patients with hepatic lacerations but little or no hemoperitoneum were managed nonoperatively. CT seems to have significant advantages over hepatic scintigraphy, angiography, and diagnostic peritoneal lavage. By combining information on the clinical state of the patient and CT findings, therapy of hepatic injury can be individualized and the incidence of nontherapeutic laparotomies decreased.     

Renal laceration secondary to blunt trauma in soccer

A case of a blunt abdominal trauma in soccer causing laceration of the left kidney is presented. A 22-year-old male soccer player was hit in the left loin by the opponent goalkeeper's knee. Within a few hours the injured player developed signs of greater intraabdominal hemorrhage. Laparotomy revealed laceration of the left kidney and nephrectomy was performed. The postoperative course was uneventful and the patient is still playing soccer 5 years after the injury. Blunt abdominal trauma leading to intraabdominal lesions is very rare even in contact sports. Laceration of a kidney due to a blunt trauma in soccer has not earlier been reported. It is emphasized that a blunt abdominal trauma in sports might cause a severe intra-abdominal lesion.     

Proximal ureteral avulsion from blunt abdominal trauma.

Blunt abdominal trauma which resulted in isolated avulsion of the ureter in a 19-month-old boy prompted a review of the literature to determine the pathophysiology and frequency of this injury. Fifty-four patients were identified and delay in diagnosis was the most common problem (33%). The authors discuss the controversies in management of this injury and recommend steps to ensure prompt recognition of ureteral avulsion from blunt trauma.