Stress profile of infant rib in the setting of child abuse: A finite element parametric study

Tsai, Andy; Coats, Brittany; Kleinman, Paul K.

doi:10.1016/j.jbiomech.2012.05.049

Cited by 24 publications

(5 citation statements)

References 30 publications

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“…Finite element modeling has been utilized to investigate parameters of physical forces surrounding fractures. 74 Although biomechanical research has yet to provide a definitive answer to several biomechanical questions surrounding abusive head trauma (such as whether shaking can or cannot cause subdural hemorrhages, and whether neck injury is necessary in cases of violent shaking), the biomechanical literature, in spite of its flaws, is useful and informative. Additionally, exciting research has emerged into the use of serum or cerebral spinal fluid biomarkers to aid in the diagnosis of abusive head trauma.…”

Section: Future Researchmentioning

confidence: 99%

Abusive Head Trauma

Narang

Clarke

2014

J Child Neurol

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Abusive head trauma has a robust and interesting scientific history. Recently, the American Academy of Pediatrics has endorsed a change in terminology to a term that is more general in describing the vast array of abusive mechanisms that can result in pediatric head injury. Simply defined, abusive head trauma is "child physical abuse that results in injury to the head or brain." Abusive head trauma is a relatively common cause of childhood neurotrauma, with an estimated incidence of 16 to 33 cases per 100,000 children per year in the first 2 years of life. Clinical findings are variable; AHT should be considered in all children with neurologic signs and symptoms, especially if no or only mild trauma is described. Subdural and retinal hemorrhages are the most common findings. The current best evidence-based literature has identified some features--apnea and severe retinal hemorrhages--that reliably discriminate abusive from accidental injury. Longitudinal studies of outcomes in abusive head trauma patients demonstrate that approximately one-third of the children are severely disabled, one third of them are moderately disabled, and one third have no or only mild symptoms. Abusive head trauma cases are complex cases that require a rigorous, multidisciplinary team approach. The clinician can establish this diagnosis with confidence if he/she maintains a high index of suspicion for the diagnosis, has knowledge of the signs, symptoms, and risk factors of abusive head trauma, and reasonably excludes other etiologies on the differential diagnosis.

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Section: Future Researchmentioning

confidence: 99%

Abusive Head Trauma

Narang

Clarke

2014

J Child Neurol

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“…Currently, insufficient data is available to estimate the risk of injuries to such internal organs from chest deformation data only. Ongoing efforts are directed at developing and validating biomechanical models that account for the physiology of children and that are specific to impacts with low-velocity vehicles, such as those considered here 22 , 34 – 36 , and allow their combination with specific body part models that better determine the effects of blunt forces.…”

Section: Discussionmentioning

confidence: 99%

Crash test-based assessment of injury risks for adults and children when colliding with personal mobility devices and service robots

Paez-Granados

Billard

2022

Sci Rep

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Autonomous mobility devices such as transport, cleaning, and delivery robots, hold a massive economic and social benefit. However, their deployment should not endanger bystanders, particularly vulnerable populations such as children and older adults who are inherently smaller and fragile. This study compared the risks faced by different pedestrian categories and determined risks through crash testing involving a service robot hitting an adult and a child dummy. Results of collisions at 3.1 m/s (11.1 km/h/6.9 mph) showed risks of serious head (14%), neck (20%), and chest (50%) injuries in children, and tibia fracture (33%) in adults. Furthermore, secondary impact analysis resulted in both populations at risk of severe head injuries, namely, from falling to the ground. Our data and simulations show mitigation strategies for reducing impact injury risks below 5% by either lowering the differential speed at impact below 1.5 m/s (5.4 km/h/3.3 mph) or through the usage of absorbent materials. The results presented herein may influence the design of controllers, sensing awareness, and assessment methods for robots and small vehicles standardization, as well as, policymaking and regulations for the speed, design, and usage of these devices in populated areas.

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“…Finally, the solid mesh model was then imported into the software of Abaqus 6.12 (Dassault Systemes Simulia Company, Providence, RI, USA) for material properties setting and ligaments adding. The Young’s modulus of the bone and cartilage were assigned as 38 MPa and 2.3 MPa, while the Poisson’s ratio was 0.3 for bone and 0.4 for cartilage in the established model [ 20 ]. The ligaments were modeled as linear springs.…”

Section: Methodsmentioning

confidence: 99%

Finite element analysis of the kinematic coupling effect of the joints around talus when Ponseti manipulation

Shi

Liu

et al. 2021

BMC Musculoskelet Disord

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Background Little information was obtained from the published papers about the kinematic coupling effect between tarsal bones during Ponseti manipulation. The aim was to explore the kinematic coupling effect of the joints around talus, to investigate the kinematic rhythm and coupling relationship of tarsal joints; to clarify the pulling effect on medial ligament of the ankle during the process of Ponseti manipulation. Methods The model of foot and ankle was reconstructed from the Chinese digital human girl No.1 (CDH-G1) image database. Finite element analysis was applied to explore the kinematic coupling effect of the joints around talus. The distal tibia and fibula bone and the head of talus were fixed in all six degrees of freedom; outward pressure was added to the first metatarsal head to simulate the Ponseti manipulation. Kinematic coupling of each tarsal joint was investigated using the method of whole model splitting, and medial ligament pulling of the ankle was studied by designing the model of medial ligament deletion during the Ponseti manipulation. Results All the tarsal joints produced significant displacement in kinematic coupling effect, and the talus itself produced great displacement in the joint of ankle. Quantitative analysis revealed that the maximum displacement was found in the joints of talonavicular (12.01mm), cuneonavicular (10.50mm), calcaneocuboid (7.97mm), and subtalar(6.99mm).The kinematic coupling rhythm between talus and navicular, talus and calcaneus, calcaneus and cuboid, navicular and cuneiform 1 were 1:12, 1:7, 1:2 and 1:1.6. The results of ligaments pulling showed that the maximum displacement was presented in the ligaments of tibionavicular (mean 27.99mm), talonavicular (21.03mm), and calcaneonavicular (19.18 mm). Conclusions All the tarsal joints around talus were involved in the process of Ponseti manipulation, and the strongest kinematic coupling effect was found in the joints of talonavicular, subtalar, calcaneocuboid, and cuneonavicular. The ligaments of tibionavicular, talonavicular, and calcaneonavicular were stretched greatly. It was suggested that the method of Ponseti management was a complex deformity correction processes involved all the tarsal joints. The present study contributed to better understanding the principle of Ponseti manipulation and the pathoanatomy of clubfoot. Also, the importance of cuneonavicular joint should be stressed in clinical practice.

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Stress profile of infant rib in the setting of child abuse: A finite element parametric study

Cited by 24 publications

References 30 publications

Abusive Head Trauma

Abusive Head Trauma

Crash test-based assessment of injury risks for adults and children when colliding with personal mobility devices and service robots

Finite element analysis of the kinematic coupling effect of the joints around talus when Ponseti manipulation

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