Imaging Of Trauma Research Articles

An incidental finding of a rare anomaly: Intraorbital cyst with coexisting optic disc pit

A 46-year-old gentleman referred for opinion about an orbital mass discovered on imaging for left eye blunt trauma. On examination, an orbital cystic lesion along with an optic nerve pit was found, which has been rarely reported. In this present case, we will describe some investigational findings of such a rarely described anomaly and emphasizing the role of optic nerve imaging in each case of optic disc pit and other malformations of optic nerve.

Posterior Wall Acetabular Fracture After Low-Energy Trauma Masquerading as Infection: A Case Report.

A 12-year-old adolescent boy presented after a low-energy fall with groin pain, inability to bear weight, painful passive range of motion, fever, elevated inflammatory markers, and upper respiratory symptoms. Initial radiographs did not demonstrate any abnormality, and magnetic resonance imaging suggested infection. Posterior wall acetabular fracture was not diagnosed until a computed tomography-guided biopsy was performed. Pediatric acetabular fractures are exceedingly rare. They can be difficult to diagnose after low-energy trauma as symptoms mimic infectious hip pathologies. Children presenting with infectious hip symptomology and a history of trauma may benefit from more extensive trauma imaging before costly and invasive infectious diagnostic procedures.

A “High-Reliability Organization” Approach to Improve Trauma Imaging Performance

PurposeCT is the gold standard for triaging critically ill patients, including in trauma, and its use has increased over time. CT turnaround times (TATs) are frequently targeted for improvement. As opposed to linear reductionist processes such as Lean and Six Sigma, a high-reliability organization (HRO) approach focuses on culture and teams to enable rapid problem solving. The authors evaluated the HRO model to rapidly generate, trial, select, and implement improvement interventions to improve trauma patient CT performance. MethodsAll trauma patients presenting to a single institution’s emergency department during a 5-month period were included. Project periods included 2-month preintervention, 1-month wash-in, and 2-month postintervention. Each initial trauma CT encounter during the wash-in and postintervention periods created job briefs in which the radiologist ensured that all involved had the pertinent clinical information and agreed on the imaging needed, thereby creating a shared mental model as well as an opportunity to raise concerns and provide ideas for improvement. ResultsA total of 447 patients were included: 145 preintervention, 68 wash-in, and 234 postintervention. The seven selected interventions were trauma text alert; scripted CT technologist-radiologist communication; modification of CT acquisition, processing, sending, and interpretation; and trauma mobile phones. The seven selected interventions reduced trauma patient CT median TATs by 60% (78 vs 31 min, P < .001), demonstrating the effectiveness of an HRO approach to improvement. ConclusionsAn HRO-based approach was rapid in generating, trialing, selecting, and implementing improvement interventions, and the interventions were effective at substantially decreasing trauma patient CT TATs.

Clinical and radiologic comparison between oblique lateral interbody fusion and minimally invasive transforaminal lumbar interbody fusion for degenerative lumbar spondylolisthesis

To compare the short-term clinical efficacy and radiologic differences between oblique lateral interbody fusion(OLIF) and minimally invasive transforaminal lumbar interbody fusion (MIS-TLIF) for degenerative lumbar spondylolisthesis. A retrospective analysis was performed on 58 patients with lumbar spondylolisthesis treated with OLIF or MIS-TLIF from April 2019 to October 2020. Among them, 28 patients were treated with OLIF (OLIF group), including 15 males and 13 females aged 47 to 84 years old with an average age of (63.00±9.38) years. The other 30 patients were treated with MIS-TLIF(MIS-TLIF group), including 17 males and 13 females aged 43 to 78 years old with an average age of (61.13±11.10) years. General conditions, including operation time, intraoperative blood loss, postoperative drainage, complications, lying in bed, and hospitalization time were recorded in both groups. Radiological characteristics, including intervertebral disc height (DH), intervertebral foramen height (FH), and lumbar lordosis angle (LLA), were compared between two groups. The visual analogue scale (VAS) and Oswestry disability index (ODI) were used to evaluate the clinical effect. The operation time, intraoperative blood loss, postoperative drainage, lying in bed, and hospitalization time in OLIF group were significantly less than those in the MIS-TLIF group (P<0.05). The intervertebral disc height and intervertebral foramen height were significantly improved in both groups after the operation (P<0.05). The lumbar lordosis angle in OLIF group was significantly improved compared to before the operation(P<0.05), but there was no significant difference in the MIS-TLIF group before and after operation(P>0.05). Postoperative intervertebral disc height, intervertebral foramen height, and lumbar lordosis were better in the OLIF group than in the MIS-TLIF group (P<0.05). The VAS and ODI of the OLIF group were lower than those of the MIS-TLIF group within 1 week and 1 month after the operation (P<0.05), and there were no significant differences in VAS and ODI at 3 and 6 months after the operation between the two groups(P>0.05). In the OLIF group, 1 case had paresthesia of the left lower extremity with flexion-hip weakness and 1 case had a collapse of the endplate after the operation;in the MIS-TLIF group, 2 cases had radiation pain of lower extremities after decompression. Compared with MIS-TLIF, OLIF results in less operative trauma, faster recovery, and better imaging performance after lumbar spine surgery.

Unsatisfactory post-operative trauma imaging is predictive of revision surgery

Introduction This study aimed to assess the relationship between immediate post-operative imaging and the risk of revision surgery for mechanical failure, as well as to determine the effect of routine peer review of post-operative imaging on the rate of unsatisfactory radiological outcomes and revision surgery. Methods Two trauma fellowship-trained consultants reviewed all post-operative images prior to the department adopting a metalwork multidisciplinary team and judged whether the surgery was satisfactory or not. Trauma lists and imaging were reviewed for a 90-day follow-up period to determine if a patient had required revision surgery. Following analysis a daily review was introduced where a consensus decision was reached regarding the fixation. A further 90-day follow-up period was utilised to determine the subsequent rate of revision surgery. Results In the first cohort 977 cases were identified with an overall revision rate of 2.5%, 875 cases having satisfactory imaging (89.6%) and 102 unsatisfactory (10.4%). Revision rates were 0.5% and 19.6%, respectively. Following introduction of the daily peer review process 709 cases were identified with an overall revision rate of 1.6%, 664 cases had satisfactory imaging (93.7%) and 45 unsatisfactory (6.3%). Revision rates were 0.5% and 17.8%, respectively. Patients with unsatisfactory imaging were significantly more likely to require a revision ( p &lt; 0.0001). There was a significant drop of 4% in the rate of unsatisfactory imaging between the two cohorts. Conclusion Unsatisfactory post-trauma imaging can be predictive of the need for revision surgery and peer review of imaging should form part of continuous clinical governance.

Imaging of Abusive Head Trauma in Children.

In this article, we describe relevant anatomy, mechanisms of injury, and imaging findings of abusive head trauma (AHT). We also briefly address certain mimics of AHT, controversies, pearls, and pitfalls. Concepts of injury, its evolution, and complex nature of certain cases are highlighted with the help of case vignettes.

The Current State of Susceptibility-Weighted Imaging and Quantitative Susceptibility Mapping in Head Trauma.

Susceptibility-weighted imaging (SWI) is a MR imaging technique suited to detect structural and microstructural abnormalities in traumatic brain injury (TBI). This review article provide an insight in to the physics principles of SWI and its clinical application in unraveling the complex interaction of the biophysical mechanisms of head injury. Literature evidences support SWI as the most ideal sequence in detection of microbleeds, which is the "tip of the iceberg" biomarker of microvascular injuries. The review also detailed the emerging advance techniques of Quantitative susceptibility mapping (QSM) and artificial intelligence offer the ability to detect and follow the evolution of microbleeds in patient with chronic TBI. These new techniques offers a unique insight into the acute and chronic state of TBI.

Utility of computed tomography reconstructed thoracolumbar spinal imaging in blunt trauma.

Fractures of the thoracolumbar (TL) spine are common and may cause neurologic damage, pain, and reduced quality of life. Computed tomography (CT) TL reconstructions from CT chest, abdomen, and pelvis (CAP) are used to identify TL fractures; however, their benefit over CAP imaging is unclear. We hypothesized that reformatted TL images do not identify additional clinically significant injuries or change outcomes. Retrospective data were collected 2016 to 2021 from trauma patients at a level 1 trauma center. All patients 18 years or older with TL fractures on CT CAP with/without CT TL reformats were included. Clinically significant TL fractures were defined as requiring operative fixation, brace, or spinal rehabilitation. A binary classification model was created to assess the diagnostic utility of CTCAP compared with CTTL in predicting clinically significant fractures in patients who underwent CT CAP/TL. There were 828 patients with TL fractures, 634 had both CT CAP/CT TL (CAPTL) and 194 CTCAP only (CAP). There were 134 clinically significant TL fractures (16%) (14 [7.2%] CT CAP vs. 120 [18.9%] CT CAPTL, p < 0.001). There were no differences among unstable fractures, fractures on magnetic resonance imaging (MRI) only, mortality, or neurologic deficits on discharge between CAPTL and CAP ( p > 0.05). Among clinically significant fractures, CAPTL was not associated with increased MRI utilization, surgery, spinal brace, or spinal cord rehabilitation ( p > 0.05). Among clinically insignificant fractures, CAPTL was associated with increased MRIs, length of stay (LOS), and intensive care unit LOS ( p < 0.05). CAPTL was also an independent predictor of increased MRIs (odds ratio, 5.79; 95% confidence interval, 2.29-14.65; p < 0.01) and spine consultation (odds ratio, 2.39; 95% confidence interval, 1.64-3.67; p < 0.01). More CT CAP/TL were performed in those with clinically significant fractures; however, CTCAP was equivalent to CTTL for detection of fractures ( p > 0.05). CTCAP alone is sufficient to identify clinically significant TL fractures. While the addition of TL reformatted imaging minimizes missed injuries, it is associated with increased hospital LOS and MRI resource utilization. Therefore, careful consideration is needed for appropriate CT TL patient selection. Therapeutic/Care Management; Level IV.

Abdominal Trauma Imaging in a Nigerian Tertiary Hospital-Our Experience with 87 Adult Patients.

Abdominal trauma is a major cause of morbidity and mortality in low- and medium-income countries (LMICs). Abdominal trauma imaging is important in determining the location and severity of organ injury, the need for surgery, and the identification of complications. The choice of imaging in abdominal trauma in LMICs is influenced by peculiar problems, which include the availability of imaging modality, expertise, and cost. There are few reports on options of trauma imaging in LMICs, and this study aimed to identify and characterise the type of imaging done for patients presenting with abdominal trauma at the University of Ilorin Teaching Hospital. This was a retrospective observational study of patients with abdominal trauma who presented at the University of Ilorin Teaching Hospital from 2013 to 2019. Records were identified, and data were extracted and analysed. A total of 87 patients were included in the study. There were 73 males and 14 females. The abdominal ultrasound was the commonest modality done in 36 (41%) patients, whereas abdominal computed tomography was done in five (6%) patients. Eleven patients (13%) had no imaging done, and 10 of these patients proceeded to having surgery. In patients with intraoperative finding of perforated viscus, the sensitivity of radiography was 85% and specificity was 100%, whereas that of the ultrasound was 86.7% and 50% for sensitivity and specificity, respectively. The ultrasound scan was the commonest imaging done for patients who presented with features of haemorrhage (P = 0.04), odds ratio (OR) = 1.29 (95% confidence interval [CI] = 1.08-1.6), and patients with severe injury, P = 0.03, OR = 2.07 (95% CI = 1.06-4.06). Gender (P = 0.64), shock at presentation (P = 0.19), and mechanism of injury (P = 0.11) did not influence the choice of imaging. Abdominal trauma imaging in this setting was majorly via ultrasound and abdominal radiographs. Factors suggested to influence the pattern of abdominal trauma imaging in LMICs include the availability of specific imaging modality, cost, lack of standardisation and definite abdominal trauma protocols.

PD12-03 IMPACT OF A RENAL TRAUMA IMAGING PROTOCOL ON DELAYED IMAGING RATES AND HIGH-GRADE RENAL TRAUMA MANAGEMENT

You have accessJournal of UrologyCME1 Apr 2023PD12-03 IMPACT OF A RENAL TRAUMA IMAGING PROTOCOL ON DELAYED IMAGING RATES AND HIGH-GRADE RENAL TRAUMA MANAGEMENT Leah Chisholm, George Koch, Rohan Bhalla, Abimbola Ayangbesan, Jennifer Haung, William Walton, and Niels Johnsen Leah ChisholmLeah Chisholm More articles by this author , George KochGeorge Koch More articles by this author , Rohan BhallaRohan Bhalla More articles by this author , Abimbola AyangbesanAbimbola Ayangbesan More articles by this author , Jennifer HaungJennifer Haung More articles by this author , William WaltonWilliam Walton More articles by this author , and Niels JohnsenNiels Johnsen More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000003259.03AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Delayed-phase imaging (DPI) is recommended by the American Urological Association (AUA) for suspected renal injuries. Our institution historically obtained delays in less than 30% of American Association for the Surgery of Trauma (AAST) grade III-V renal injuries. In August 2021, we implemented a renal trauma imaging protocol to improve AUA guideline adherence (Figure 1). We sought to compare patient outcomes to further evaluate the utility of DPI in high-grade renal trauma. METHODS: Trauma patients with an AAST III-V renal injury presenting from January 2005 to September 2022 were identified from our institutional trauma registry. Patients with a contrasted computed tomography scan of the abdomen on admission were included. For patients without DPI, AAST IV grades were assigned based on the depth and location of renal lacerations and character of retroperitoneal fluid. DPI rates and patient outcomes were compared before and after implementation of our renal trauma imaging protocol. RESULTS: Of 742 patients, 650 (87.6%) were in the pre-protocol group and 92 (12.4%) in the post-protocol group. AAST III renal injuries were the most common among both groups, however AAST IV injuries were more frequent in the post-protocol cohort (30.4%) whereas AAST V injuries were more frequent in the pre-protocol group (11.5%). Following protocol implementation, the rate of DPI on admission for high grade renal trauma patients nearly tripled from 22.8% to 58.7% (p<0.001). The rate of follow-up cross-sectional imaging also increased from 11.7% to 58.7% (p<0.001). Despite increased guideline-adherent imaging, there was no significant difference in interventions for urinary extravasation (6.5% vs. 2.2%, p=0.10). However, there was a significant increase in angioembolizations for hemorrhage (3.5% vs 9.8%, p<0.01). Rates of all-cause readmission (9.1% vs. 5.4%, p=0.24) and renal-specific readmission (0.5% vs. 0.0%, p=0.51) were unchanged. CONCLUSIONS: The implementation of a multi-disciplinary renal trauma imaging protocol improves AUA guideline adherence. While guideline-concordant imaging led to more procedures for bleeding, rates of intervention for urinary extravasation, all-cause readmissions, or renal-specific readmissions were unchanged. Further research into the indications for DPI is needed. Source of Funding: N/A © 2023 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 209Issue Supplement 4April 2023Page: e401 Advertisement Copyright & Permissions© 2023 by American Urological Association Education and Research, Inc.MetricsAuthor Information Leah Chisholm More articles by this author George Koch More articles by this author Rohan Bhalla More articles by this author Abimbola Ayangbesan More articles by this author Jennifer Haung More articles by this author William Walton More articles by this author Niels Johnsen More articles by this author Expand All Advertisement PDF downloadLoading ...

MP02-10 UROLOGY DIRECTED MANAGEMENT OF HIGH GRADE RENAL TRAUMA IS ASSOCIATED WITH A LOW RATE OF EMERGENCY NEPHRECTOMY/RENORRHAPHY

You have accessJournal of UrologyCME1 Apr 2023MP02-10 UROLOGY DIRECTED MANAGEMENT OF HIGH GRADE RENAL TRAUMA IS ASSOCIATED WITH A LOW RATE OF EMERGENCY NEPHRECTOMY/RENORRHAPHY Aisling Fawaz, Robert Keenan, and Elaine Redmond Aisling FawazAisling Fawaz More articles by this author , Robert KeenanRobert Keenan More articles by this author , and Elaine RedmondElaine Redmond More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000003213.10AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Major trauma care in Ireland is managed through a multidisciplinary collaborative approach between trauma surgeons and organ subspecialists e.g. urologists, cardiothoracic surgeons, neurosurgeons etc. Thus the urology service directs the management of all urological trauma irrespective of the grade of injury or other organ involvement. This is in contrast to the management of trauma care in other jurisdictions such as the United States where the majority of trauma cases are primarily managed by trauma surgeons with other specialities consulted as required. One recent study found that urology was consulted in only 15% of high grade renal trauma cases presenting to their institution even though urology consultation was associated with a lower nephrectomy rate (36.4% vs 78.8%).1 We hypothesised that the standardised urology directed care of renal injuries in Ireland would be associated with comparatively higher rates of renal preservation and reduced intervention/nephrectomy. The aim of our study was to evaluate the management of high grade renal trauma in Ireland using data derived from the Irish Major Trauma Audit which is stored on the Trauma Audit and Research Network (TARN) database. METHODS: The TARN database was used to identify all cases of significant renal trauma presenting to the 26 trauma receiving hospitals in Ireland between 2014 and 2020. Demographic data, mechanism of injury, injury characteristics, management and patient outcomes were analysed. RESULTS: There were a total of 426 renal trauma cases recorded during the study period, of which 305 patients had a high grade renal injury. The majority of patients in this group were male (241 (79%)). The median age was 28 years (range: 0.3-93.9 years). There were 276 cases of blunt renal trauma (90%) and 29 cases of penetrating trauma (10%). The most common cause for blunt renal trauma was road traffic accident. 65 patients (21%) required blood or blood products. Seven patients underwent emergency nephrectomy or renorraphy (2%). CONCLUSIONS: The need for emergency nephrectomy due to high grade renal trauma in Ireland is exceedingly rare. We conclude that an integrated multidisciplinary approach to trauma care results in a higher likelihood of avoiding intervention in this cohort of patients. 1Wang SL, Agrawal P, Rostom M, Gupta N, et al. Urology Consult: Association with Renal Trauma Imaging and Intervention. Urology 2022 (In press) Source of Funding: None © 2023 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 209Issue Supplement 4April 2023Page: e14 Advertisement Copyright & Permissions© 2023 by American Urological Association Education and Research, Inc.MetricsAuthor Information Aisling Fawaz More articles by this author Robert Keenan More articles by this author Elaine Redmond More articles by this author Expand All Advertisement PDF downloadLoading ...

Factors Contributing to Computed Tomography Trauma Scan Times at a Tertiary Center: Improving Emergency Department Trauma Imaging Workflow Through Targeted Interventions.

The aims of the study are to identify factors contributing to computed tomography (CT) trauma scan turnaround time variation and to evaluate the effects of an automated intervention on time metrics. Throughput metrics were captured via picture archiving and communication system from January 1, 2018, to December 16, 2019, and included 17,709 CT trauma scans from our institution. Initial data showed that imaging technologist variation played a significant role in trauma imaging turnaround time. In December 2019, we implemented a 2-pronged intervention: (1) educational intervention to techs and (2) modified trauma CT abdomen/pelvis to autogenerate and autosend reformats to picture archiving and communication system. A total of 13,169 trauma CT scans were evaluated from the postintervention period taking place from January 2020 to March 2021. Throughput metrics such as last image to first report interval and emergency department length of stay were captured and compared with performing technologist, time of day, and weekday versus weekend scans. Substantial variability among trauma CT scans was observed. For CT trauma abdomen/pelvis, the interval from last image to initial report decreased from 26.4 to 24.0 minutes ( P = 0.001) while the interval between first and last image time decreased from 11.4 to 4.2 minutes ( P < 0.001). Emergency department length of stay also decreased from 3.9 to 3.7 hours ( P < 0.0001) in the postintervention period. Variation among imaging technologist was statistically significant and became less significant after intervention ( P = 0.09, P = 0.54). Factors such as imaging technologist variability, time of day, and day of the week of trauma scans played a significant role in CT trauma turnaround time variability. Automation interventions can help with efficiency in image turnaround time.

Whole-body computed tomography after major blunt trauma: is it necessary?

Introduction: Trauma is a significant health problem today. Also, it is the foremost reason for death among people ages 1-45; for this reason, the economic and social effect is more articulated. The whole-body CT scans have become a standard procedure in managing trauma patients in many trauma centers. We think that whole body CT will be beneficial in patients with blunt trauma. Thus, we aimed to examine patients with blunt trauma who applied to the emergency department and had whole-body CT scans. Methods: Patient who applied to blunt trauma and had whole-body CT scans to the emergency department of a tertiary training and research hospital between Jan 1, 2021, and Jan 1, 2022, were examined in this single-center, retrospective study. The study population was established based on inclusion and exclusion criteria. ISS, GCS, and whole-body CT scans were compared for mortality. Results: Cranial bone fracture (p= 0.001), epidural hemorrhage (p= 0.001), traumatic subarachnoid hemorrhage (p= 0.001), cerebral edema (p= 0.003), and thoracic contusion (p= 0.046) were significant for mortality. Also, the number of pathological regions in whole-body CT scans was not associated with mortality (p= 0.587). ISS (p=0.001) and GCS (p= 0.001) predicted mortality in patients who experienced whole-body CT scans. Conclusion: Based on our findings, we can detect organ and tissue injuries quickly and in detail using whole-body CT scanning after major blunt trauma. In addition, various protocols are needed in multiple trauma patients to reduce the number of unnecessary WBCT scans. Therefore, whole-body CT scans may be helpful for selection, as ISS and GCS are markers of mortality. Keywords: Whole-body Tomography, Trauma, Trauma Imaging

Evaluation of ensemble strategy on the development of multiple view ankle fracture detection algorithm.

To identify the feasibility and efficiency of deep convolutional neural networks (DCNNs) in the detection of ankle fractures and to explore ensemble strategies that applied multiple projections of radiographs.Ankle radiographs (AXRs) are the primary tool used to diagnose ankle fractures. Applying DCNN algorithms on AXRs can potentially improve the diagnostic accuracy and efficiency of detecting ankle fractures. A DCNN was trained using a trauma image registry, including 3102 AXRs. We separately trained the DCNN on anteroposterior (AP) and lateral (Lat) AXRs. Different ensemble methods, such as "sum-up," "severance-OR," and "severance-Both," were evaluated to incorporate the results of the model using different projections of view. The AP/Lat model's individual sensitivity, specificity, positive-predictive value, accuracy, and F1 score were 79%/84%, 90%/86%, 88%/86%, 83%/85%, and 0.816/0.850, respectively. Furthermore, the area under the receiver operating characteristic curve (AUROC) of the AP/Lat model was 0.890/0.894 (95% CI: 0.826-0.954/0.831-0.953). The sum-up method generated balanced results by applying both models and obtained an AUROC of 0.917 (95% CI: 0.863-0.972) with 87% accuracy. The severance-OR method resulted in a better sensitivity of 90%, and the severance-Both method obtained a high specificity of 94%. Ankle fracture in the AXR could be identified by the trained DCNN algorithm. The selection of ensemble methods can depend on the clinical situation which might help clinicians detect ankle fractures efficiently without interrupting the current clinical pathway. This study demonstrated different ensemble strategies of AI algorithms on multiple view AXRs to optimize the performance in various clinical needs.

Accuracy and utilization patterns of intraabdominal imaging for major trauma in pregnancy

Imaging protocols for major maternal trauma during pregnancy are not standardized, and it is uncertain whether focused assessment with sonography for trauma or computed tomography of the abdomen/pelvis is preferred for detecting intraabdominal hemorrhage. This study aimed to estimate the accuracy of focused assessment with sonography for trauma compared with computed tomography of the abdomen/pelvis, validate imaging accuracy with clinical outcomes, and describe clinical factors associated with each imaging mode. A retrospective cohort study of pregnant patients evaluated for major trauma at one of two Level 1 trauma centers between 2003 and 2019. We identified 4 imaging groups: no intraabdominal imaging, focused assessment with sonography for trauma only, computed tomography of the abdomen/pelvis only, and both focused assessment with sonography for trauma and computed tomography of the abdomen/pelvis. The primary outcome was a composite maternal severe adverse pregnancy outcome, including death and intensive care unit admission. We estimated sensitivity, specificity, and positive and negative predictive values of focused assessment with sonography for trauma for hemorrhage with computed tomography of the abdomen/pelvis as the reference standard. We performed analysis of variance and chi-square tests to compare clinical factors and outcomes across imaging groups. Multinomial logistic regression was used to estimate associations between selected imaging mode and clinical factors. Of 119 pregnant trauma patients, 31 (26.1%) experienced a maternal severe adverse pregnancy outcome. Intraabdominal imaging modes included none in 37.0%, focused assessment with sonography for trauma only in 21.0%, computed tomography of the abdomen/pelvis only in 25.2%, and both modes in 16.8%. With computed tomography of the abdomen/pelvis as the reference, focused assessment with sonography for trauma had sensitivity, specificity, positive predictive value, and negative predictive value of 11%, 91%, 50%, and 55%, respectively. One patient had a maternal severe adverse pregnancy outcome with a positive focused assessment with sonography for trauma and negative computed tomography of the abdomen/pelvis, and 2 patients with a positive computed tomography of the abdomen/pelvis did not have an adverse outcome. Use of computed tomography of the abdomen/pelvis with or without focused assessment with sonography for trauma was associated with a higher injury severity score, lower systolic blood pressure nadir, higher motor vehicle collision speed, and higher rates of hypotension, tachycardia, bone fracture, maternal severe adverse pregnancy outcome, and fetal demise. The association of computed tomography of the abdomen/pelvis use with higher injury severity score, tachycardia, and lower systolic blood pressure nadir persisted in multivariable analysis. With each 1-point increase in the injury severity score, there was an 11% higher likelihood of using computed tomography of the abdomen/pelvis over focused assessment with sonography for trauma for intraabdominal imaging. The sensitivity of focused assessment with sonography for trauma in detecting intraabdominal hemorrhage in pregnant trauma patients is poor, and computed tomography of the abdomen/pelvis has a low false-negative rate. Providers seem to prefer computed tomography of the abdomen/pelvis to focused assessment with sonography for trauma in patients with the most severe trauma. Computed tomography of the abdomen/pelvis with or without focused assessment with sonography for trauma is more accurate than focused assessment with sonography for trauma alone.

Ophthalmic imaging in abusive head trauma

BackgroundOphthalmic imaging plays an increasingly important role the evaluation of abusive head trauma, however these imaging modalities may be unfamiliar to non-ophthalmologists. ObjectiveTo provide pediatricians and child abuse pediatric professionals with background on ophthalmic imaging techniques in the context of suspected abuse, as well as information on commercial options and costs for those interested in augmenting their ophthalmic imaging capabilities. MethodsWe performed a review of the ophthalmic imaging literature for fundus photography, ocular coherence tomography, fluorescein angiography, ocular ultrasound, computed tomography, magnetic resonance imaging and postmortem imaging. We also contacted individual vendors for equipment pricing information. ResultsFor each ophthalmic imaging modality, we demonstrate its role in the evaluation of abusive head trauma including indications, potential findings, sensitivity and specificity of findings for abuse, and commercial options. ConclusionsOphthalmic imaging is an important supportive component of the evaluation for abusive head trauma. When used in conjunction with clinical examination, ophthalmic imaging can improve diagnostic accuracy, support documentation, and possibly improve communication in medicolegal contexts.

Non-osseous considerations in diagnostic imaging for pelvic and acetabular trauma

High-quality imaging is crucial for orthopedic traumatologists in the evaluation and management of pelvic and acetabular fractures. Computed tomography (CT) plays an essential role in the diagnosis and treatment of patients with these complex injuries. A thoughtful evaluation of associated soft tissues can reveal additional details about the patient and their injury that may impact treatment. This review aims to highlight soft tissue findings that should be identified when evaluating the initial diagnostic imaging after pelvic and acetabular trauma.

Abstract Number ‐ 79: Flow Diversion for Traumatic Vertebral Artery Arteriovenous Fistula: A Case Report

Introduction Arterial pseudoaneurysms and arteriovenous fistulas of intracranial and extracranial vessels are an uncommon occurrence following blunt and penetrating trauma and are commonly treated by vessel sacrifice,dependent on collateral flow1‐3. Others have treated these cases with covered stents4 and flow diversion5. Advances in flow diversion technology have led to their use in other pathologies, including carotid cavernous fistulas6 and vertebral artery pseudoaneurysms7. We present a case of a traumatic arteriovenous fistula of the dominant vertebral artery requiring vessel preservation and reconstruction. Methods A 42‐year‐old male presented with a gunshot wound to the face below the right eye. Trauma imaging identified fractures of the right maxillary sinus and orbital floor. CTA of the head/neck showed a dominant right vertebral artery dissection and pseudoaneurysm with a non‐dominant left vertebral artery (VA), effectively ending in PICA. Results Due to the inefficient supply to the posterior circulation via the left VA, the decision was made to preserve and reconstruct the right VA and the patient was brought to the angiography suite. Angiographically, the patient was noted to have retrograde filling of the posterior circulation, basilar and right VA through the anterior circulation in injection of both ICAs, suggesting decreased antegrade flow from the injured right VA. The right VA was catheterized which showed a high‐flow, high‐grade arteriovenous fistula from the V3 segment with venous drainage into multiple extraspinal cervical and epidural cervical veins. This also identified the fistulous point at the location of the pseudoaneurysm on CTA. The diagnostic catheter was exchanged for a guide catheter, and a Phenom 27 microcatheter (Medtronic; Minneapolis, MN) was navigated into the basilar artery. A Duo microcatheter (Microvention; Aliso Viejo, CA)/Synchro 2 (Stryker; Kalamazoo, MI) standard microwire complex was used to identify the fistulous point and positioned for jailing. A Pipeline Flex 4.75×20mm (Medtronic; Minneapolis, MN) was deployed from the proximal V4 segment across the pseudoaneurysm with persistence of the AVF. A second Pipeline Flex 5×20mm was placed in telescoping fashion with persistence of the AVF. A third Pipeline Flex 5×16mm was placed in telescoping fashion and flow diversion was observed. Using the jailed catheter, the pseudoaneurysm and fistulous point were coil embolized using a combination of helical and 3D HydroSoft coils (Microvention; Aliso Viejo, CA) of varying sizes. Final angiogram demonstrated resolution of the high‐flow AVF, improvement of antegrade flow through the right vertebral artery, and a slow‐flow low‐grade fistulous communication with the posterior extraspinal cervical veins. There were no thromboembolic complications and the patient recovered well from the procedure. Follow‐up angiography at 2 months post‐treatment showed obliteration of the AVF with a small remnant pseudoaneurysm of the right V3 segment. Conclusions Flow diversion is viable in the setting of a traumatic arteriovenous fistula requiring reconstruction of the parent vessel.

Is it time to re-think FAST? A systematic review and meta-analysis of Contrast-Enhanced Ultrasound (CEUS) and conventional ultrasound for initial assessment of abdominal trauma

BackgroundThe Focused Assessment with Sonography for Trauma (FAST) examination using conventional ultrasound has limited utility for detecting solid organ injury. Therefore, this systematic review and meta-analysis compares the performance of contrast-enhanced ultrasound (CEUS) to conventional ultrasound when used as the initial assessment for abdominal trauma prior to computed tomography (CT) imaging.MethodsA systematic literature search of major databases was conducted of human studies investigating the diagnostic accuracy of conventional ultrasound and CEUS occurring prior to CT imaging for abdominal trauma. The study followed the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) statement. The quality of studies was evaluated using the QUADAS-2 (Quality Assessment of Diagnostic Accuracy Studies 2) tool. Paired pooled sensitivity and specificity between conventional ultrasound and CEUS were compared using data extracted from the eligible studies. Diagnostic odds ratio, number needed to diagnose values, and likelihood ratios were also determined.ResultsTen studies were included. More than half of the included studies demonstrated low risk of bias. Using McNemar’s test to assess for paired binary observations, we found that CEUS had statistically higher sensitivity (0.933 vs. 0.559; two-tailed, P < 0.001) and specificity (0.995 vs. 0.979; two-tailed, P < 0.001) than conventional ultrasound in the setting of abdominal trauma, respectively. When divided into particular findings of clinical interest, CEUS had statistically higher sensitivity than conventional ultrasound in screening for active bleeding and injuries to all abdominal solid organs. CEUS also had superior diagnostic odds ratios, number needed to diagnose values, and likelihood ratios than conventional ultrasound.ConclusionThe diagnostic value of CEUS was higher than that of conventional ultrasound for differentiating traumatic abdominal injuries when used as the initial assessment in the emergency department.

As low as diagnostically acceptable dose imaging in maxillofacial trauma: a reference quality approach.

As-low-as-diagnostically-acceptable (ALADA) doses are substantially lower than current diagnostic reference levels. To improve dose management, a reference quality approach was tested in which phantom quality metrics of a clinical ALADA dose reference protocol were used to benchmark potential ALADA dose protocols for various scanner models. Spatial resolution, contrast resolution, contrast-to-noise ratio (CNR) and subjective noise and sharpness were evaluated for a clinical ALADA dose reference protocol at 80 kV and 40 mA (CTDIvol 2.66 mGy) and compared with test protocols of two CT scanners at 100 kV and 35 mA (3.08-3.44 mGy), 80 kV and 54-61 mA (2.65 mGy), 80 kV and 40 mA (1.73-1.92 mGy), and 80 kV and 21-23 mA (1.00-1.03 mGy) using different kernels, filtered backprojection and iterative reconstructions. The test protocols with the lowest dose showing quality metrics non-inferior to the reference protocol were verified in a cadaver study by determining the diagnostic accuracy of detection of maxillofacial fractures and CNR of the optical nerve and rectus inferior muscle. 36 different image series were analysed in the phantom study. Based on the phantom quality metrics, potential ALADA dose protocols at 1.73-1.92 mGy were selected. Compared with the reference images, the selected protocols showed non-inferiority in the detection and classification of maxillofacial fractures and non-inferior CNR of orbital soft tissues in the cadaver study. Reference quality metrics from clinical ALADA dose protocols may be used to guide selection of potential ALADA dose protocols of different CT scanners.