Risks of radiation versus risks from injury: A clinical decision analysis for the management of penetrating palatal trauma in children

Systematic Review of CT Angiography in Guiding Management in Pediatric Oropharyngeal Trauma

OBJECTIVES

Pediatric oropharyngeal trauma is common. Although most cases resolve uneventfully, there have been reports of internal carotid artery injury leading to devastating neurovascular sequelae. There is significant controversy regarding the utility of CT angiography (CTA) in children with seemingly minor oropharyngeal trauma. The goal of this study was to appraise changes in diagnosis and treatment based on CTA results.

METHODS

A comprehensive search of PubMed, Embase, CINAHL, Scopus, the Cochrane Ear, Nose and Throat Disorders Group Trials Register, and the ClinicalTrials.gov database was performed following PRISMA guidelines.

RESULTS

The search yielded 5,078 unique abstracts, of which 8 articles were included. A total of 662 patients were included, with 293 having any CT head/neck imaging, and 255 with CTA. Eleven injuries/abnormalities of the carotid were found on CTAs, comprising edema around the carotid (n = 8), potential intimal tear (n = 1), carotid spasm (n = 1), and carotid compression (n = 1). The pooled proportion of imaging findings on CTA that could lead to changes in clinical management was 0.00 (95% CI 0.00-0.43). Angiography was obtained in 10 patients, in 6 cases due to abnormal CTA. Angiography identified 1 patient with vessel spasm and two patients with carotid intima disruption without thrombus. No patient underwent vascular repair or suffered cerebrovascular injury.

CONCLUSION

Imaging with CTA yielded radiological abnormalities in a few instances. These results do not support the routine use of CTA in screening pediatric oropharyngeal trauma when balanced against the risk of radiation, as it rarely resulted in management changes and was not shown to improve outcomes.

LEVEL OF EVIDENCE

N/A Laryngoscope, 133:457-466, 2023.

The Utility of CTA in Pediatric Oropharyngeal Trauma: A Systematic Review and Meta-Analysis

OBJECTIVE(S)

To analyze the utility of computed tomography angiography (CTA) in identifying internal carotid artery (ICA) injury and reducing cerebrovascular accident (CVA) incidence in children presenting with normal neurologic exams after oropharyngeal trauma (OT).

DATA SOURCES

PubMed, Scopus, CINAHL, and Cochrane.

REVIEW METHODS

A systematic review and meta-analysis were performed following PRISMA guidelines. Of 1,185 studies screened, 95 studies of pediatric OT met inclusion criteria. Meta-analysis of proportions was performed.

RESULTS

A total of 1224 children with OT were analyzed. Excluding case reports, the weighted proportion of a CVA after OT was 0.31% (95% CI 0.06-0.93). If a child presented without neurologic deficits, 0.30% (95% CI 0.05-0.95) returned with new neurologic deficits. An ICA injury was identified in 0.89% (95% CI 0.16-2.74) of screening CTAs. No difference in CVA incidence was seen in children with screening CTA (0.52% [95% CI 0.02-2.15]) compared to children without screening CTA (0.42% [95% CI 0.06-1.37]). Patients who developed CVA had a higher proportion of injuries >2 cm, injuries at the posterior pillar or tonsil, and injuries with a writing utensil or popsicle stick compared to patients without CVA.

CONCLUSION

The proportion of children experiencing an ICA injury leading to CVA after sustaining OT is low. CTAs infrequently show ICA changes in children with normal neurological exams. Children who receive CTAs do not have a significantly lower incidence of CVAs than children who do not receive CTAs. Clinicians should weigh the risks and benefits of a CTA based on an individual child's presentation and discuss this with caregivers for shared decision-making. Laryngoscope, 133:25-37, 2023.

Neck CT angiography examinations for pediatric oropharyngeal trauma: diagnostic yield and proposal of a new targeted technique

BACKGROUND

Neck computed tomography (CT) angiography is commonly ordered for pediatric patients with soft palate trauma to exclude vascular injury. Debate exists regarding what type of imaging is indicated in this setting, particularly amid growing concern that standard neck CT angiography results in considerable radiation exposure.

OBJECTIVE

To assess the diagnostic yield and estimated dose reduction of a novel targeted protocol extending from the skull base to the hyoid bone to evaluate pediatric oropharyngeal trauma.

MATERIALS AND METHODS

A retrospective imaging and medical chart review was performed of patients for whom a neck CT angiography was obtained for an indication of oropharyngeal trauma between 2008 and 2018. Effective dose and size-specific dose estimates (SSDEs) were estimated for standard and targeted neck CT angiography protocols with calculation of percent dose reduction of the targeted exams.

RESULTS

Ninety-eight CT angiography examinations were reviewed. No cases were positive for neurological or major vessel injury; one case was positive for small vessel extravasation. Clinically significant nonvascular findings included phlegmonous change, retained foreign body, retropharyngeal/mediastinal air and pterygoid process fracture. With the exception of mediastinal air, all findings would have been included in the targeted protocol. Effective dose and SSDE were calculated for all cases where CTDI_vol (volume CT dose index) had been reported (n=72). There was a statistically significant reduction in dose for the targeted protocol with an effective dose decrease of 69.7%±10.5% (P=0.009) and SSDE decrease of 53.9%±14.7% (P=0.01). Limiting ionizing radiation to the lung apices, esophagus and thyroid gland provided the greatest dose savings.

CONCLUSION

Based on low diagnostic yield and high radiation dose associated with standard neck CT angiography for evaluating oropharyngeal trauma, a targeted protocol is recommended, resulting in significantly less dose to the neck, while preserving diagnostic yield.

Carotid Dissection and Cerebral Infarction From Posterior Oropharyngeal Trauma: The Diagnostic and Therapeutic Challenges

Posterior oropharyngeal trauma commonly occurs in children and frequently presents to the emergency department (ED). Rarely, serious infectious and neurologic sequelae result. Emergency providers are tasked with the challenge of diagnosing the minority with life-threatening complications while maintaining thoughtful stewardship regarding radiation exposure. A previously healthy 2-year-old girl sustained trauma to her posterior oropharynx with a toothbrush that resulted in a left carotid dissection. This dissection was diagnosed in the ED via computed tomography angiogram, Otolaryngology and neurosurgery were consulted in the ED, and anticoagulation therapy was initiated with aspirin. The child did initially well and was without neurologic deficit and no brain ischemia on magnetic resonance imaging. She was discharged home on aspirin therapy. Four days after initial injury, the child returned to the ED after a seizure. Computed tomography scan of the head demonstrated infarction at the junction of the left parietal and temporal areas. Although neurologic complications are rare, posterior oropharyngeal trauma in children is not. There are many diagnostic and therapeutic challenges in its management. This case is, to the authors' awareness, the first case report in the English literature of a known and treated carotid dissection in a child after posterior oropharyngeal trauma that resulted in stroke despite diagnosis and initiation of treatment. The diagnostic and therapeutic challenges of posterior oropharyngeal trauma in children are discussed in this article.

Primary Palate Trauma in Patients Presenting to US Emergency Departments, 2006-2010

Importance

The sequelae of palate trauma vary from minimal discomfort to major neurovascular injury. Infrequency of palate trauma and clinician unfamiliarity with the disease process may lead to variation in evaluation, treatment, and disposition in the emergency department (ED).

Objectives

To measure the incidence of primary palate trauma visits to US emergency departments with analysis of demographics, disposition, and repair and to determine frequency and factors associated with head and neck imaging.

Design, Setting, and Participants

A retrospective analysis using the Healthcare Cost and Utilization Project Nationwide Emergency Department Sample was performed of 22 094 patients presenting to US emergency departments from 2006 to 2010 with a primary diagnosis of palate trauma. Data analysis was conducted from March 29, 2016, to November 18, 2017.

Main Outcomes and Measures

National estimates of palate trauma were calculated from weights available within the database. Palate repair was identified by International Classification of Diseases, Ninth Revision, Clinical Modification procedure codes. Imaging was calculated from reliable Current Procedural Terminology coding facilities identified using a previously published method. Logistic models were calculated to identify clinical associations for admission, imaging, and palate repair.

Results

A total of 22 094 patients (13 967 male and 8121 female patients, 6 missing data on sex; median age, 2.8 years [interquartile range, 1.1-6.1 years]) with primary palate trauma presented to US emergency departments during the study period. Total hospital visits decreased from 4715 (1.58 per 100 000 people) to 3915 (1.26 per 100 000 people) during the 5-year study period. A total of 19 819 patients (89.7%) had routine discharge from the hospital, while palate repair (965 [4.4%]) and mortality (34 [0.2%]) were rare. Complicated palate trauma (odds ratio [OR], 5.32; 95% CI, 3.10-9.15), male sex (OR, 1.57; 95% CI, 1.11-2.21), codiagnosis status (OR, 2.75; 95% CI, 1.84-4.12), and residence in the Northeast vs South (OR, 2.73; 95% CI, 1.11-6.71) increased the likelihood of admission, which was infrequent (1027 patients [4.6%]). After restriction to reliable Current Procedural Terminology coding facilities, head and neck imaging occurred in 823 of 6897 patients (11.9%). Factors associated with head and neck imaging included living in a medium vs large metropolitan area (OR 1.62; 95% CI, 1.04-2.55), while living in the Midwest vs South region (OR, 0.43; 95% CI, 0.25-0.74) had a negative association with imaging.

Conclusions and Relevance

Although it is often suggested in the otolaryngology literature to perform imaging, primary palate trauma usually results in a routine discharge home without imaging or repair. Imaging frequency should be noted since palate trauma could have life-threatening neurovascular sequelae, which presents an opportunity to define and promote optimal management for potential neurologic sequelae in the patients who were not imaged.

Is Delayed Phase Computed Tomography Imaging Necessary After Blunt Renal Trauma in Children?

OBJECTIVE

To characterize the utilization of delayed phase computed tomography (CT) imaging in blunt renal trauma and determine if the omission of delayed phase CT imaging affected clinical outcomes in children.

MATERIALS AND METHODS

A prospectively collected trauma database was reviewed between 2006 and 2016 to identify patients aged ≤21 years with a diagnosis of renal injury from blunt trauma. Demographic characteristics, injury grade, Injury Severity Score, non-kidney organ injuries, radiologic studies, and clinical course were reviewed. Patients were categorized into 2 groups: those who received CT with delayed images in the emergency room and those who did not.

RESULTS

In total, 121 patients met the inclusion criteria. Delayed scans were obtained in 50 patients (41%) but omitted in 71 (59%). Age, weight, non-kidney organ injuries, and imaging location did not differ between groups. Injury Severity Score was higher in the no-delay group than in the delay group (median 16 vs 10, respectively, P = .40). Median length of stay was 3 days without significant differences by cohort (P = .24). The proportion of patients who received abdominal CT scans after admission, underwent a urologic procedure, or were readmitted did not differ significantly between groups.

CONCLUSION

This study was unable to demonstrate a difference in outcomes between patients who had a CT with delayed imaging and patients who did not. This questions the universal necessity for delayed images after blunt renal trauma. Future prospective studies are necessary to develop pediatric trauma guidelines that balance imaging needs and radiation exposure.

Blunt Intraoral Trauma Resulting in Internal Carotid Artery Dissection and Infarction in a Child

A 16-month-old child fell forward onto her toothbrush sustaining minor oropharyngeal injury. The following day, she became acutely lethargic with localizing neurologic signs of a cerebrovascular infarct. CTA and MR imaging demonstrated occlusion of the right internal carotid artery with a large right middle cerebral artery territory infarction. She was treated with decompressive craniectomy and anticoagulation but remained weak on the left side. Pediatric oropharyngeal injuries can rarely be complicated by internal carotid artery injury with dissection, thrombosis, or embolization to the cerebral circulation. For the best outcome, carotid dissection treatment requires prompt diagnosis at the initial onset of neurologic symptoms. However, further research is needed to determine the best management and advanced imaging work-up for neurologically intact children.