Search

Background: In hypotensive patients with thoracoabdominal penetrating injuries, trauma surgeons often face a considerable dilemma, which cavities and when to explore. We hypothesized that the Focused Assessment with Sonography for Trauma (FAST) would be accurate enough to determine the need and sequence of cavity exploration. Methods: We conducted a 4-year retrospective study at a level 1 trauma center with high penetrating trauma volume. Patients with potential multi-cavity thoracoabdominal injuries were selected based on the location and number of external wounds. Findings in the operation or on computed tomography were used as references to evaluate the sensitivity, specificity, positive predictive value and negative predictive value of pericardial and abdominal FAST. Results: A total of 2851 patients with penetrating injury were admitted from 2012 to 2015. Of those, 103 patients (3.6%) met our inclusion criteria (stab wounds 56.3%, gunshot wounds 43.7%). Median age: 32, male gender: 89.3%, median injury severity score: 17, in-hospital mortality rate: 11.7%. Thirty-seven patients (35.9%) required surgical exploration of more than one cavity. Although the pericardial FAST was falsely negative in only one case with large left hemothorax, all cardiac injuries were treated without delay (12/13, 92.3% sensitivity). Sensitivity and specificity of the abdominal FAST was 68.5 and 93.9%, respectively. Conclusions: In hypotensive patients following penetrating thoracoabdominal injuries, the pericardial FAST was highly sensitive and could reliably determine the need to explore the pericardium. While positive findings of abdominal FAST warrant an exploratory laparotomy, negative abdominal FAST does not exclude the abdominal cavity as a bleeding source. [ABSTRACT FROM AUTHOR]

Background: Patients with adhesive small bowel obstruction (ASBO) often develop intraabdominal free fluid (IFF). While IFF is a finding on abdominopelvic computed tomography (CT) associated with the need for surgical intervention, many patients with IFF can be still managed non-operatively. A previous study suggested that a higher red blood cell count of IFF is highly predictive of strangulated ASBO. We hypothesized that radiodensity in IFF (Hounsfield unit (HU)) on CT would predict the need for surgical intervention.Study Design: Patients with clinicoradiological evidence of ASBO between January 2009 and December 2013 were identified. In patients with IFF > 3 cm2 identified on CT, the HU was measured in the largest pocket of IFF. A sensitivity analysis was performed to determine a high-density HU threshold. The HU of patients who underwent therapeutic laparotomy was compared with those successfully discharged with non-operative management.Results: A total of 318 patients with ASBO (median age 52 years, 56.0 % male) were identified. Of 111 patients who had IFF on CT, 55.9 % underwent therapeutic laparotomy and 15.3 % required bowel resection. Radiodensity of IFF in the operative group was significantly higher than that in the non-operative group (18.2 vs. 7.0 HU, p < 0.01). Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of high-density IFF (>10 HU) to predict the need for surgical intervention were 83.9, 65.3, 75.4, 76.2, and 75.6 %, respectively.Conclusions: High-density IFF on CT was significantly associated with the need for surgical intervention in patients with ASBO. Prospective study to validate the predictive value of high-density IFF on CT will be warranted. [ABSTRACT FROM AUTHOR]

Objectives Suggestive radiographic studies with nonvisualization of the appendix can present a challenge to clinicians in the evaluation of pediatric abdominal pain. The primary objective of this study was to quantify the accuracy of magnetic resonance imaging ( MRI) and of ultrasound ( US) in the setting of nonvisualization of the appendix. Secondary objectives reported include sensitivity of MRI and US overall and correlation between MRI and US for diagnosis of appendicitis. Methods Records of pediatric emergency department patients aged 3 to 21 years undergoing MRI and/or US for the evaluation of appendicitis were retrospectively reviewed. Radiographs were categorized as a normal appendix, neither demonstrating the appendix nor demonstrating abnormalities consistent with appendicitis; equivocal, not demonstrating the appendix but showing evidence of appendicitis; demonstrating an abnormal appendix consistent with appendicitis; or demonstrating an alternate pathology. The reading was compared with the final diagnosis for accuracy. Results Of the 589 patients included, 146 had appendicitis. Diagnostic accuracy for studies with a nonvisualized appendix without secondary signs of appendicitis was 100% for MRI and 91.4% (95% CI = 87.3% to 94.2%) for US. Diagnostic accuracy for studies with a nonvisualized appendix with secondary signs of appendicitis was 50% (95% CI = 2.5% to 97.5%) for MRI and 38.9% (95% CI = 18.2% to 64.5%) for US. Appendicitis was ultimately diagnosed in 8.6% of patients with an otherwise negative right lower quadrant ( RLQ) US that failed to directly identify the appendix. There was a moderate correlation between US and MRI (ρ = 0.573, p = 0.0001) when all studies were considered. Conclusions Magnetic resonance imaging without secondary signs of appendicitis is effective in excluding appendicitis regardless of whether the appendix is directly visualized, while otherwise negative RLQ US that fail to identify the appendix are less useful. Secondary signs of appendicitis without visualization of the appendix were not helpful regardless of radiographic modality. Results of MRI and US correlated moderately well. [ABSTRACT FROM AUTHOR]