Reliability of the high-speed camera-based system (hsc-kinovea) for lower-limb explosive strength endurance assessment in athletes / Confiabilidade do sistema de câmera de alta velocidade (cav-kinovea) para avaliação da resistência de força explosiva de membros inferiores em atletas

ABSTRACT The present study verified the reliability of the high-speed camera-based system (HSC-Kinovea) in the lower-limb explosive strength endurance assessment in athletes. Eleven male volleyball players (21.8 ± 2.9 years; 186.3 ± 6.2 cm and 82.3 ± 11.0 kg) participated in the intermittent vertical jumping test in two days. The test was filmed and later analyzed using Kinovea 0.8.15 software to obtain the mean and peak power variables. Regarding reliability, the intra-class correlation coefficient, the typical error of measurements, and Bland-Altman plots were used. The method presented satisfactory values for inter and intra-class correlations (˃ 0.88). The typical values error of measurement presented in the inter-rater analysis was 0.95 W.kg-1 and 0.59 W.kg-1 for the peak and the mean power, respectively. In the intra-assessment analyses, the typical measurement error values were 7.02 W.kg-1 and 5.66 W.kg-1 (test-retest) and 1.59 W.kg-1 and 0.24 W.kg-1 (duplicates videos) for peak and average power, respectively. The HSC-Kinovea system is reliable for assessing the variables of the explosive strength endurance in athletes.

RESUMO O presente estudo verificou a confiabilidade do sistema baseado em câmeras de alta velocidade (CAV-Kinovea) na avaliação da resistência de força explosiva de membros inferiores em atletas. Onze atletas masculinos de voleibol (21.8 ± 2.9 anos de idade; 186.3 ± 6.2 cm and 82.3 ± 11.0 kg) participaram do teste de saltos verticais de contexto intermitente em dois dias. O teste foi filmado e posteriormente analisado no software Kinovea 0.8.15 para obter as variáveis ​​de potência pico e média. Para determinar a confiabilidade, utilizou-se o coeficiente de correlação intraclasse, o erro típico de medidas e os gráficos de Bland-Altman. O método apresentou valores satisfatórios para as correlações inter e intra-classe (˃0,88). Os valores do erro típico de medida apresentados na análise interavaliadores foram 0,95 W.kg-1 e 0,59 W.kg-1 para potência pico e média, respectivamente. Nas análises intra-avaliação, os valores do erro típico de medida foram 7,02 W.kg-1 e 5,66 W.kg-1 (teste-reteste) e 1,59 W.kg-1 e 0,24 W.kg-1 (duplicados de vídeos ) para potência pico e média, respectivamente. O sistema CAV-Kinovea é confiável para avaliar as variáveis da resistência de força explosiva em atletas.

Macular hemorrhage after roller coaster riding in a single-eyed patient with congenital glaucoma / Hemorragia macular após passeio em montanha russa em paciente monocular com glaucoma congênito

ABSTRACT A 21-year-old female presented with a 4-day history of decreased vision in her only functional eye (right eye, OD). She had a history of multiple ocular surgeries in both eyes because of congenital glaucoma and had lost light perception in her left eye several years prior. Ophthalmological examination revealed 0.15 Snellen visual acuity, and fundoscopy revealed nearly total cupping and pallor of the optic disc and multiple retinal hemorrhagic foci in the macula in OD. Lesions spontaneously resolved over a few months. Gravitational forces during a roller coaster ride may have caused this macular hemorrhage.

RESUMO Uma paciente de 21 anos de idade se apresentou com perda de visão há quatro dias em seu único olho com visão útil. Ela tinha uma história de cirurgias oculares múltiplas nos dois olhos devido a um glaucoma congênito e perda de percepção luminosa em olho esquerdo há muitos anos. O exame oftalmológico revelou acuidade visual de Snellen de 0,15 e na fundoscopia foi observada escavação do nervo óptico quase total e palidez de papila, assim como focos hemorrágicos múltiplos na região macular. As lesões se resolveram espontaneamente em alguns meses. Acreditamos que essas hemorragias maculares tenham sido causadas pelas forças gravitacionais geradas durante o passeio na montanha russa.

Fístula intestinal após ingestão de magnetos / Intestinal fistula after magnets ingestion

Accidental ingestion of magnetic foreign bodies has become more common due to increased availability of objects and toys with magnetic elements. The majority of them traverse the gastrointestinal system spontaneously without complication. However, ingestion of multiple magnets may require surgical resolution. The case of an 18-month girl who developed an intestinal fistula after ingestion of two magnets is reported.

A ingestão acidental de corpo estranho magnético tem sido mais observada, devido à disponibilidade cada vez maior de brinquedos e objetos com imãs. A maioria deles é eliminada pelo trato digestivo espontaneamente. Porém, a ingestão de duas ou mais peças podem desencadear situações de resolução cirúrgica. Relatamos aqui o caso de uma menina de 18 meses que desenvolveu fístula intestinal após a ingestão de 2 peças imantadas.

Accidents due to falls from roof slabs / Acidentes por queda de laje

CONTEXT AND OBJECTIVE Falls from the roof slabs of houses are accidents of high potential severity that occur in large Brazilian cities and often affect children and adolescents. The aims of this study were to characterize the factors that predispose towards this type of fall involving children and adolescents, quantify the severity of associated lesions and suggest preventive measures. DESIGN AND SETTING Descriptive observational prospective longitudinal study in two hospitals in the metropolitan region of São Paulo. METHODS Data were collected from 29 cases of falls from roof slabs involving children and adolescents between October 2008 and October 2009. RESULTS Cases involving males were more prevalent, accounting for 84%. The predominant age group was schoolchildren (7 to 12 years old; 44%). Leisure activities were most frequently being practiced on the roof slab at the time of the fall (86%), and flying a kite was the most prevalent game (37.9%). In 72% of the cases, the children were unaccompanied by an adult responsible for them. Severe conditions such as multiple trauma and traumatic brain injuries resulted from 79% of the accidents. CONCLUSION Falls from roof slabs are accidents of high potential severity, and preventive measures aimed towards informing parents and guardians about the dangers and risk factors associated with this type of accident are needed, along with physical protective measures, such as low walls around the slab and gates with locks to restrict free access to these places. .

CONTEXTO E OBJETIVO A queda de cima da laje é um acidente com alto potencial, que ocorre nas grandes metrópoles brasileiras e frequentemente acomete crianças e adolescentes. O objetivo do estudo foi caracterizar os fatores que predispõem às quedas da laje envolvendo crianças e adolescentes, quantificar a gravidade das lesões associadas e sugerir medidas preventivas. TIPO DE ESTUDO E LOCAL Estudo prospectivo longitudinal observacional de caráter descritivo realizado em dois hospitais na região metropolitana de São Paulo. MÉTODOS Foram coletados dados de 29 casos de queda da laje envolvendo crianças e adolescentes no período de outubro de 2008 a outubro de 2009. RESULTADOS O gênero masculino foi o mais prevalente, com 84% dos casos. A faixa etária predominante foi a escolar (7 a 12 anos) com 44%. O lazer foi a atividade mais frequente praticada na laje no momento da queda (86%), sendo a brincadeira de empinar pipa a mais prevalente (37,9%). Em 72% dos casos, as crianças estavam desacompanhadas de um adulto responsável. Quadros graves como politraumas e traumas cranioencefálicos representaram 79% dos acidentes. CONCLUSÃO A queda da laje representa acidente com alto potencial de gravidade, sendo necessária a adoção de medidas preventivas direcionadas ao esclarecimento de pais e responsáveis sobre os perigos e fatores de risco relacionados com esse tipo de acidente, além da adoção de medidas de proteção física, como muretas ao redor da laje e portões com travas para restringir o livre acesso a esse local. .

Traumas cerebrales en niños secundarios a cabeceo de balones en fútbol: Modelo de simulación matemática / Mathematical simulation of mild brain injury in children heading soccer balls

Background: Heading professional soccer balls can generate mild traumatic brain injury in children. The long-term consequences could include difficulty in solving problems and deficits in memory and language. Aim: To assess the impact of a professional adult soccer ball on a child´s head, using the finite element method and dynamic effects to predict brain damage. Material and Methods: The minimum conditions of an adult game were considered: the ball speed was 6 m/s and the diffuse blow was 345 and 369 Newtons (N), on the forehead and top of the head, respectively. A head was modeled in order to know the stresses, strains and displacements generated by the impacts. The extent of the alteration was determined by comparing the strength of brain tissue, with predictions of computed stresses. The geometric characteristics of the head were transferred from medical images. The input data of the materials of a child´s head was obtained from the literature. Results: In the case of heading with the forehead, mathematical simulation showed frontal lobe alterations, with brain stresses between 0.064 and 0.059 N/mm2. When the heading was with the upper head zone, the brain alterations were in the parietal lobe, with stresses between 0.089 and 0.067 N/mm². In the cerebral spinal fluid the pressure was 3.61 to 3.24 N/mm2. Conclusions: The mathematical simulations reveal evidence of brain alterations caused by a child heading adult soccer balls. The model presented is an economical and quick tool that can help predict brain damage. It demonstrates the ability of the cerebral spinal fluid (CSF) to absorb shock loads.

Childhood trauma profile at a tertiary care hospital in India.

Childhood injuries are the leading cause of morbidity and mortality worldwide. We evaluated the type of pediatric injuries encountered in the emergency room amongst 225 children (boys 151, girls 64; age range, 2 mo-12 yr). Data were collected using a structured injury proforma over a period of 12 months. Injuries occurred at home (n=137, 60.8%), street (n=38, 16.8%), and playground (n=37, 16.4%). Most frequent injuries were falls (n=144, 64%) and road traffic injuries (RTI) (n=37, 16.4%). Injuries mostly consisted of fractures (n=72, 32%), bruises (n=39, 17.3%), and lacerations (n=35, 15.5%). Child abuse was recognized in 7 (3.5%) children. There was an average delay of 2 hour 50 minutes to reach the medical facility.

A Case of Epithelial Inclusion Cyst of Iris

To report on an epithelial inclusion cyst of the iris that was successfully treated with needle aspiration and Ab externo laser photocoagulation. A 6-year-old boy was treated for a 6.0 mm fluid-filled cyst in the anterior chamber of the right eye. Thirteen months previously, he had undergone primary closure of a 6 mm full-thickness corneal laceration. The subsequent cyst was diagnosed as an epithelial inclusion cyst of the iris. His vision decreased to finger-count at 30 cm as the cyst grew over the pupil. We performed needle aspiration of the cyst and Ab externo laser photocoagulation of the cyst wall. The treated lesion was completely removed. The patient's visual acuity recovered to 20/40 without complications. There was no recurrence as determined by slit lamp examination up to 6 months after treatment. Needle aspiration and Ab externo laser photocoagulation can be used to effectively treat epithelial inclusion cysts of the iris.

Inner ear damage in children due to noise exposure from toy cap pistols and firecrackers: a retrospective review of 53 cases.

This retrospective study presents the findings of inner ear damage documented in 53 children exposed to impulsive sound emitted by toy weapons and firecrackers. There were 49 boys and four girls aged between four and fourteen years. Thirty-nine children were affected unilaterally while fourteen had bilateral hearing loss (total of 67 ears). Most of the hearing loss (>70%) was sensorineural high frequency hearing loss, while only nine out of the 67 injured ears had sensorineural mid frequency hearing loss. Seven children sustained a traumatic ear drum perforation. Dizziness or tinnitus was reported by twenty children, with pathological ENG findings in four of them. This paper re-emphasizes the possibility of inner ear damage in children from exposure to noisy toys.

Patologia corio-vitreo-retiniana por desaceleraçäo rápida / Corio-vitreo-retinal hemorrhage related to fast desaceleration

Os autores autores apresentam dois pacientes portadores de hemorragia corio-vitreo-retiniana relacionada com a desaceleraçäo rápida provocada pela queda livre em parque de diversöes. É de se esperar que estes hematomas reabsorvam espontaneamente. É discutida a possível etiologia desta nova entidade e o tratamento realizado nestes 2 casos