High-Powered Magnet Exposures in Children: A Multi-Center Cohort Study.

BACKGROUND AND OBJECTIVES: High-powered magnets were effectively removed from the US market by the Consumer Product Safety Commission (CPSC) in 2012 but returned in 2016 after federal court decisions. The United States Court of Appeals for the 10th Circuit cited imprecise data among other reasons as justification for overturning CPSC protections. Since then, incidence of high-powered magnet exposure has increased markedly, but outcome data are limited. In this study, we aim to describe the epidemiology and outcomes in children seeking medical care for high-powered magnets after reintroduction to market. METHODS: This is a multicenter, retrospective cohort study of patients aged 0 to 21 years with a confirmed high-powered magnet exposure (ie, ingestion or insertion) at 25 children's hospitals in the United States between 2017 and 2019. RESULTS: Of 596 patients with high-powered magnet exposures identified, 362 (60.7%) were male and 566 (95%) were <14 years of age. Nearly all sought care for magnet ingestion (n = 574, 96.3%), whereas 17 patients (2.9%) presented for management of nasal or aural magnet foreign bodies, 4 (0.7%) for magnets in their genitourinary tract, and 1 patient (0.2%) had magnets in their respiratory tract. A total of 57 children (9.6%) had a life-threatening morbidity; 276 (46.3%) required an endoscopy, surgery, or both; and 332 (55.7%) required hospitalization. There was no reported mortality. CONCLUSIONS: Despite being intended for use by those >14 years of age, high-powered magnets frequently cause morbidity and lead to high need for invasive intervention and hospitalization in children of all ages.

Food Insecurity in a Pediatric Emergency Department and the Feasibility of Universal Screening.

INTRODUCTION: Children with food insecurity (FI) experience adverse health outcomes due to inadequate quantity or quality of food. Food insecurity may be high among families seeking emergency care. The Hunger Vital Sign (HVS) is a two-question validated tool used to screen families for FI. Our goal in this study was to assess prevalence of FI among emergency department (ED) patients, patient-level risk factors for FI, and the feasibility of screening. METHODS: This was a cross-sectional analysis of FI in the ED. Parents or guardians of ED patients and adult patients (18 years or older) were approached for screening using the HVS during screening periods spanning weekdays/weekends and days/evenings. All ED patients were eligible, excluding siblings, repeat visits, critically ill patients, minors without a guardian, and families that healthcare staff asked us not to disturb. Families answered the HVS questions verbally or in writing, based on preference. Families with positive screens received information about food resources. We summarized patient and visit characteristics and defined medical complexity using a published algorithm. Multivariable logistic regression was used to assess FI risk factors. RESULTS: In July-August 2019, 527 patients presented during screening periods: 439 agreed to screening, 18 declined, 19 met exclusions, and 51 were missed. On average the screening tool required five minutes (range 3-10 minutes) to complete. Most families (328; 75%) preferred to answer in writing rather than verbally. Overall, 77 participants (17.5%) screened positive for FI. In regression analyses, FI was associated with self-reported race/ethnicity (combined variable) of African American or Black (odds ratio [OR] 5.21, 95% confidence interval [CI], 2.13-12.77), Hispanic (OR 3.47, 95% CI, 1.48-8.15), or mixed/other (OR 3.81, 95% CI, 1.54-9.39), compared to non-Hispanic white. FI was also associated with public insurance type (OR 5.74, 95% CI, 2.52-13.07, reference: private insurance), and each year of increasing patient age (OR 1.05, 95% CI, 1.01-1.09). There were no associations between FI and medical complexity or preferred language. CONCLUSION: Food insecurity was common among our ED patients. Race and ethnicity, insurance status, and increasing patient age were associated with increased odds of FI. Efforts to include universal FI screening for ED patients with immediate connection to resources will enhance overall care quality and address important health needs.

Pediatric Adnexal Torsion: Not Just a Postmenarchal Problem.

BACKGROUND: Pediatric adnexal torsion is rare, can be challenging to recognize, and may result in ovarian loss. OBJECTIVE: We sought to identify and compare the defining characteristics of adnexal torsion in premenarchal and postmenarchal girls. METHODS: A retrospective cohort study was performed at a tertiary care children's hospital, including patients diagnosed postnatally with adnexal (ovarian or tubal) torsion between 1997 and 2013. Proportions were compared using relative risk regression. RESULTS: Adnexal torsion was found in 59 premenarchal and 43 postmenarchal girls. Abdominal pain was the most common chief complaint (54%). History included reports of pain (96%), vomiting (67%), and fever (19%). Excluding 12 patients with isolated tubal torsion and 19 with a teratoma, there were no statistically significant differences in ovarian loss in premenarchal vs. postmenarchal girls (47% and 25% respectively; relative risk [RR] = 1.8 [95% confidence interval {CI} 0.9-3.8]), left- vs. right-sided torsion (47% and 32%; RR = 1.5 [95% CI 0.8-2.7]), pain duration ≤ 2 days vs. > 2 days (31% and 41%; RR = 0.8 [95% CI 0.4-1.5]; n = 64) and severe pain vs. mild to moderate (38% and 33%; RR = 1.1 [95% CI 0.7-1.5]; n = 56). CONCLUSIONS: The diagnosis of pediatric adnexal torsion is difficult and often delayed. Pain and tenderness may not be isolated to a unilateral lower quadrant. Although traditionally considered a postmenarchal problem, in a pediatric academic emergency department adnexal torsion occurred with similar frequency in premenarchal and postmenarchal girls. The potential for organ salvage means that adnexal torsion should be considered in all females presenting with acute abdominal pain regardless of age or menstrual history.

Pediatric magnet ingestions: the dark side of the force.

BACKGROUND: Pediatric magnet ingestions are increasing. Commercial availability of rare-earth magnets poses a serious health risk. This study defines incidence, characteristics, and management of ingestions over time. METHODS: Cases were identified by searching radiology reports from June 2002 to December 2012 at a children's hospital and verified by chart and imaging review. Relative risk (RR) regressions determined changes in incidence and interventions over time. RESULTS: In all, 98% of ingestions occurred since 2006; 57% involved multiple magnets. Median age was 8 years (range 0 to 18); 0% of single and 56% of multiple ingestions required intervention. Compared with 2007 to 2009, ingestions increased from 2010 to 2012 (RR = 1.9, 95% confidence interval 1.2 to 3.0). Intervention proportion was unchanged (RR = .94, 95% confidence interval .4 to 2.2). Small spherical magnets comprised 26.8% of ingestions since 2010; 86% involved multiple magnets and 47% required intervention. CONCLUSIONS: Pediatric magnet ingestions and interventions have increased. Multiple ingestions prompt more imaging and surgical interventions. Magnet safety standards are needed to decrease risk to children.

Upper aerodigestive magnetic foreign bodies in children.

OBJECTIVES/HYPOTHESIS: Small, powerful magnets are increasingly available in toys and other products, and are responsible for increasing numbers of foreign body injuries in children. Small, spherical, neodymium magnets available since 2008 are of particular concern. We aimed to identify all cases of upper aerodigestive foreign bodies at our institution over 15.5 years of study. STUDY DESIGN: Case series including all patients treated at an urban, tertiary care children's hospital who had upper aerodigestive magnetic foreign bodies, from January 1, 1998 through April 30, 2013. METHODS: We manually reviewed 7,049 patient records abstracted from billing data to identify all patients 0 to 20 years of age who had upper aerodigestive magnetic foreign bodies. RESULTS: We identified four cases of upper aerodigestive magnetic foreign bodies, one involving the hypopharynx, and three involving the upper esophagus. Three occurred in 2010 or later. Two cases involve the ingestion of multiple, spherical, neodymium magnets recently marketed as desktop toys. In both of these cases, there was a rapid development of mucosal injury at the site of attraction between two magnets. CONCLUSIONS: As small, powerful magnets become more ubiquitous, pediatric magnet foreign body injuries are increasing. Although most are gastrointestinal, we identified four recent cases involving the upper aerodigestive tract. Multiple magnets lodged in the hypopharynx or esophagus can rapidly cause pressure necrosis of mucosal tissues, and merit prompt management. Education regarding magnet safety and improved magnet safety standards are needed to reduce the risk of these injuries. LEVEL OF EVIDENCE: 4.

Too attractive: the growing problem of magnet ingestions in children.

BACKGROUND: Small, powerful magnets are increasingly available in toys and other products and pose a health risk. Small spherical neodymium magnets marketed since 2008 are of particular concern. OBJECTIVE: The objective of this study was to determine the incidence, characteristics, and management of single and multiple-magnet ingestions over time. METHODS: Magnet ingestion cases at a tertiary children's hospital were identified using radiology reports from June 2002 to December 2012. Cases were verified by chart and imaging review. Relative risk regressions were used to determine changes in the incidence of ingestions and interventions over time. RESULTS: Of 56 cases of magnet ingestion, 98% occurred in 2006 or later, and 57% involved multiple magnets. Median age was 8 years (range, 0-18 years). Overall, 21% of single and 88% of multiple ingestions had 2 or more imaging series obtained, whereas no single and 56.3% of multiple ingestions required intervention (25.0% endoscopy, 18.8% surgery, 12.5% both). Magnet ingestions increased in 2010 to 2012 compared with 2007 to 2009 (relative risk, 1.9; 95% confidence interval, 1.2-3.0). Small, spherical magnets likely from magnet sets comprised 27% of ingestions, all ingested 2010 or later: 86% involved multiple magnets, 50% of which required intervention. Excluding these cases, ingestions of other magnets did not increase in 2010 to 2012 compared with 2007 to 2009 (relative risk, 0.94; 95% confidence interval, 0.6-1.4). CONCLUSIONS: The incidence of pediatric magnet ingestions and subsequent interventions has increased over time. Multiple-magnet ingestions result in high utilization of radiological imaging and surgical interventions. Recent increases parallel the increased availability of small, spherical magnet sets. Young and at-risk children should not have access to these and other small magnets. Improved regulation and magnet safety standards are needed.

Sitting or tilt position for infant lumbar puncture does not increase ultrasound measurements of lumbar subarachnoid space width.

OBJECTIVE: The objective of this study was to determine whether subarachnoid space width at the site of lumbar puncture in infants changed between 3 positions: flat lateral decubitus, 45-degree tilt, and sitting. METHODS: Healthy infants younger than 4 months presenting electively to a pediatric radiology department were enrolled. Exclusion criteria included signs of dehydration, illness, or previous spine/brain surgery. Subarachnoid space width at L3-L4 was measured by ultrasound with the subject placed in 3 randomly ordered positions: flat lateral decubitus, 45-degree tilt lateral decubitus, and sitting. The 3 positions were collectively compared using both repeated-measures analysis of variance and linear mixed models (LMMs) adjusted for potential confounders. Pairs of positions were compared using LMM adjusted for potential confounders. RESULTS: Fifty subjects were enrolled (15 male and 35 female patients). Patient weight was significantly correlated with subarachnoid space width (P = 0.02). There was no statistically significant difference in subarachnoid space width between the 3 positions (repeated-measures analysis of variance P = 0.32, LMM P = 0.40). Comparisons of pairs of positions were not significantly different: flat and 45 degrees P = 0.24, 45 degrees and sitting P = 0.98, and flat and sitting P = 0.23. CONCLUSIONS: The subarachnoid space width did not significantly change between the 3 positions. An increase in lumbar puncture success rate with sitting or tilt position could be due to other factors such as increased cerebrospinal fluid pressure, increased interspinous space widening, or improved identification of landmarks.

Cleavage of high-molecular-weight kininogen by elastase and tryptase is inhibited by ferritin.

Ferritin is a protein principally known for its role in iron storage. We have previously shown that ferritin can bind high-molecular-weight kininogen (HK). Upon proteolytic cleavage by the protease kallikrein, HK releases the proinflammatory peptide bradykinin (BK) and other biologically active products, such as two-chain high-molecular-weight kininogen, HKa. At inflammatory sites, HK is oxidized, which renders it a poor substrate for kallikrein. However, oxidized HK remains a good substrate for elastase and tryptase, thereby providing an alternative cleavage mechanism for HK during inflammation. Here we report that ferritin can retard the cleavage of both native HK and oxidized HK by elastase and tryptase. Initial rates of cleavage were reduced 45-75% in the presence of ferritin. Ferritin is not a substrate for elastase or tryptase and does not interfere with the ability of either protease to digest a synthetic substrate, suggesting that ferritin may impede HK cleavage through direct interaction with HK. Immunoprecipitation and solid phase binding studies reveal that ferritin and HK bind directly with a Kd of 134 nM. To test whether ferritin regulates HK cleavage in vivo, we used THP-1 cells, a human monocyte/macrophage cell line that has been used to model pulmonary inflammatory cells. We observed that ferritin impedes the cleavage of HK by secretory proteases in stimulated macrophages. Furthermore, ferritin, HK, and elastase are all present in or on alveolar macrophages in a mouse model of pulmonary inflammation. Collectively, these results implicate ferritin in the modulation of HK cleavage at sites of inflammation.

A human bone morphogenetic protein antagonist is down-regulated in renal cancer.

We analyzed expression of candidate genes encoding cell surface or secreted proteins in normal kidney and kidney cancer. This screen identified a bone morphogenetic protein (BMP) antagonist, SOSTDC1 (sclerostin domain-containing-1) as down-regulated in kidney tumors. To confirm screening results, we probed cDNA dot blots with SOSTDC1. The SOSTDC1 message was decreased in 20/20 kidney tumors compared with normal kidney tissue. Immunohistochemistry confirmed significant decrease of SOSTDC1 protein in clear cell renal carcinomas relative to normal proximal renal tubule cells (p < 0.001). Expression of SOSTDC1 was not decreased in papillary and chromophobe kidney tumors. SOSTDC1 was abundantly expressed in podocytes, distal tubules, and transitional epithelia of the normal kidney. Transfection experiments demonstrated that SOSTDC1 is secreted and binds to neighboring cells and/or the extracellular matrix. SOSTDC1 suppresses both BMP-7-induced phosphorylation of R-Smads-1, -5, and -8 and Wnt-3a signaling. Restoration of SOSTDC1 in renal clear carcinoma cells profoundly suppresses proliferation. Collectively, these results demonstrate that SOSTDC1 is expressed in the human kidney and decreased in renal clear cell carcinoma. Because SOSTDC1 suppresses proliferation of renal carcinoma cells, restoration of SOSTDC1 signaling may represent a novel target in treatment of renal clear cell carcinoma.