Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 20.389
Filtrar
1.
BMJ Case Rep ; 15(1)2022 Jan 12.
Artigo em Inglês | MEDLINE | ID: mdl-35022201

RESUMO

A 74-year-old man was referred for a plastic surgery consultation for two previous acute episodes of right submandibular sialadenitis. Physical examination revealed a lump in the right submandibular region, painful on palpation. The initial impression on clinical examination was of sialolithiasis. The sonography demonstrated a structural heterogeneity of the submandibular gland with a hypoechogenic and vascularised nodular formation (1.5×1.2 cm), suggestive of a mixed tumour of the right maxillary gland, requiring histological evaluation. He underwent a right submandibulectomy and an IgG4-positive chronic sclerosing sialadenitis was diagnosed. The patient's condition evolved favourably, resulting in a full recovery. The clinical features and differential diagnosis of this entity are debated in light of relevant literature.


Assuntos
Cálculos das Glândulas Salivares , Sialadenite , Idoso , Cabeça , Humanos , Masculino , Cálculos das Glândulas Salivares/diagnóstico por imagem , Cálculos das Glândulas Salivares/cirurgia , Sialadenite/diagnóstico por imagem , Sialadenite/cirurgia , Glândula Submandibular/diagnóstico por imagem , Glândula Submandibular/cirurgia , Ultrassonografia
2.
Codas ; 34(1): e20200114, 2022.
Artigo em Português, Inglês | MEDLINE | ID: mdl-35019062

RESUMO

PURPOSE: To compare orofacial anthropometric measurements, with weight, height and sex of newborns. METHODS: Observational cross-sectional study carried out with 130 newborns on exclusive breastfeeding. Data collection was performed by properly trained and calibrated speech therapists. The orofacial measurements of the newborns were performed with flexible and transparent ruler 10 cm long, in the following segments: heights of the upper third(tr-g), the middle third(g-sn) and the lower third on the face (sn-gn); filter height (sn-Is), distance between the corner of the eye and the labial commissure on the right and left side (ex-ch). Weight and height measurements were collected from the newborns' medical records. The data were submitted to statistical analysis, using the Mann-Whitney test, adopting a significance level of 5%. RESULTS: Of the 130 newborns, 61 were male and 69 female. The median weight was 3.3 kg and the median height was 49 cm. There was significant difference between weight and measurement distance between the corner of the eye and the left and right labial commissure (ex-ch). There was no significant difference in orofacial measurements with sex and height. CONCLUSION: There was no difference in orofacial anthropometric measurements of full-term newborns when compared with sex and height; however, when compared to weight, there is a difference in the measurements of the distance between the corner of the eye and the labial commissure on the right and left side.


Assuntos
Aleitamento Materno , Face , Antropometria , Estatura , Estudos Transversais , Face/anatomia & histologia , Feminino , Cabeça , Humanos , Recém-Nascido , Masculino
3.
Magn Reson Imaging Clin N Am ; 30(1): 199-213, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34802579

RESUMO

Soft tissue vascular anomalies show a wide heterogeneity of clinical manifestations and imaging features. MR imaging has an important role in the diagnosis and management of vascular lesions of the head and neck. MR angiography is mandatory in cases of arteriovenous and combined malformations to assess the high-flow nature/component of the lesions and plan therapy. Infantile hemangiomas can be differentiated from congenital hemangiomas by clinical course. Reactive vascular tumors have nonspecific features similar to infantile hemangiomas. Locally malignant and malignant vascular tumors have irregular borders, infiltration of different tissue planes, and lower apparent diffusion coefficient values than benign vascular tumors.


Assuntos
Hemangioma , Malformações Vasculares , Cabeça , Hemangioma/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Pescoço , Malformações Vasculares/diagnóstico por imagem
5.
Neuroimaging Clin N Am ; 32(1): 75-91, 2022 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-34809845

RESUMO

This review article discusses the basic principles behind the use of flaps and grafts for reconstructive surgery in the head and neck, with a special emphasis on the types of commonly used free flaps, their imaging appearance as well as some frequently encountered postoperative complications. Given the ubiquity and complexity of these reconstructive techniques, it is essential that head and neck radiologists be familiar in distinguishing between the expected evolving findings, complications, and tumor recurrence.


Assuntos
Retalhos de Tecido Biológico , Neoplasias de Cabeça e Pescoço , Cabeça/diagnóstico por imagem , Cabeça/cirurgia , Neoplasias de Cabeça e Pescoço/diagnóstico por imagem , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Pescoço/diagnóstico por imagem , Pescoço/cirurgia , Recidiva Local de Neoplasia , Complicações Pós-Operatórias/diagnóstico por imagem
8.
J Mech Behav Biomed Mater ; 125: 104893, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34715640

RESUMO

Large segmental mandible bone defects still represent a challenge for endogenous regeneration. Despite the bone's capacity to heal in many clinical situations, bone defects over a critical size do not heal spontaneously. An emerging treatment of critically sized mandibular defects is the implantation of individually manufactured scaffolds consisting of biodegradable magnesium alloys. Biomedical engineers faced the challenge of developing a scaffold structure that not only provides sufficient stability, but also stimulates and promotes bone growth while considering the degradation of the magnesium alloy. The porosity of the scaffold must also support bone ingrowth and neovascularization. For an optimal design and subsequent structural optimization knowledge of external load cases is essential. However, currently the muscle and joint forces of the mandible cannot be measured directly. The aim of our study was therefore the development of a parametric human mandible model to determine the relevant boundary conditions for the subsequent structural optimization of individual jawbone implants. Using a model-based approach, determining the essential external load of the mandible as a function of the age and sex of a patient individually and the realistic simulation of the mechanical stress for patient-specific loads and anatomies has been realized. The developed model is successfully validated by evaluating the deformations and stresses of the lower jaw of a possible patient and comparing them with the results of dental research. Based on the results of the modelling, in a subsequent optimization process section forces at the interface between the bone tissue and jawbone implant can be determined and used to optimize the design of the jawbone implant.


Assuntos
Cabeça , Mandíbula , Simulação por Computador , Humanos , Porosidade , Estresse Mecânico
9.
Int J Gynaecol Obstet ; 156(1): 28-33, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33459352

RESUMO

OBJECTIVE: To construct an ultrasound partogram using serial transperineal sonographic measurements of the angle of fetal head progression during the first stage of labor, and to compare it with a conventional partogram based on digital vaginal examinations. METHODS: Between 2017 and 2018, a prospective cohort study at Drum Tower Hospital, Nanjing, China, recruited 375 nulliparous women with singleton pregnancy and spontaneous onset of labor at 37 or more gestational weeks. Transperineal ultrasound scans were performed to measure the angle of progression (AoP) every 0.5-1 h until the second stage. Vaginal examinations were also used to measure cervical dilatation. Repeated-measures analysis was used to generate labor curves. RESULTS: The labor curve generated by AoP had a pattern similar to that based on cervical dilatation. There was an initial slow period lasting approximately 5.5 h until the cervical dilatation or AoP reached the inflection point (4 cm and 119°, respectively), followed by a second, more rapid period, lasting approximately 2.5 h. CONCLUSION: Based on ultrasound data, it was feasible to construct an "angle of progression partogram" of the first stage of labor, which was similar in pattern to the partogram based on cervical dilatation measured in the same cohort.


Assuntos
Primeira Fase do Trabalho de Parto , Ultrassonografia Pré-Natal , Feminino , Cabeça/diagnóstico por imagem , Humanos , Apresentação no Trabalho de Parto , Gravidez , Estudos Prospectivos , Ultrassonografia
10.
Br J Radiol ; 95(1129): 20210796, 2022 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-34767475

RESUMO

OBJECTIVE: To present the results following a UK national patient dose audit of paediatric CT examinations, to propose updated UK national diagnostic reference levels (DRLs) and to analyse current practice to see if any recommendations can be made to assist with optimisation. METHODS: A UK national dose audit was undertaken in 2019 focussing on paediatric CT examinations of the head, chest, abdomen/pelvis and cervical spine using the methods proposed by the International Commission on Radiological Protection. The audit pro-forma contained mandatory fields, of which the post-examination dosimetry (volume CT dose index and dose-length product) and the patient weight (for body examinations) were the most important. RESULTS: Analysis of the data submitted indicates that it is appropriate to propose national DRLs for CT head examinations in the 0-<1, 1-<5, 5-<10 and 10-<15 year age ranges. This extends the number of age categories of national DRLs from those at present and revises the existing values downwards. For CT chest examinations, it is appropriate to propose national DRLs for the first time in the UK for the 5-<15, 15-<30, 30-<50 and 50-<80 kg weight ranges. There were insufficient data received to propose national DRLs for abdomen/pelvis or cervical spine examinations. Recommendations towards optimisation focus on the use of tube current (mA) modulation, iterative reconstruction and the selection of examination tube voltage (kVp). CONCLUSION: Updated UK national DRLs are proposed for paediatric CT examinations of the head and chest. ADVANCES IN KNOWLEDGE: A national patient dose audit of paediatric CT examinations has led to the proposal of updated national DRLs.


Assuntos
Auditoria Médica , Doses de Radiação , Tomografia Computadorizada por Raios X/métodos , Abdome/diagnóstico por imagem , Adolescente , Vértebras Cervicais/diagnóstico por imagem , Criança , Pré-Escolar , Controle de Formulários e Registros , Cabeça/diagnóstico por imagem , Humanos , Lactente , Registros Médicos , Pescoço/diagnóstico por imagem , Pelve/diagnóstico por imagem , Valores de Referência , Tórax/diagnóstico por imagem , Reino Unido
11.
PLoS One ; 16(12): e0259862, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34905546

RESUMO

Parkinson's disease (PD) can produce postural abnormalities of the standing body position such as kyphosis. We investigated the effects of PD, deep brain stimulation (DBS) in the subthalamic nucleus (STN), vision and adaptation on body position in a well-defined group of patients with PD in quiet standing and during balance perturbations. Ten patients with PD and 25 young and 17 old control participants were recruited. Body position was measured with 3D motion tracking of the ankle, knee, hip, shoulder and head. By taking the ankle as reference, we mapped the position of the joints during quiet standing and balance perturbations through repeated calf muscle vibration. We did this to explore the effect of PD, DBS in the STN, and vision on the motor learning process of adaptation in response to the repeated stimulus. We found that patients with PD adopt a different body position with DBS ON vs. DBS OFF, to young and old controls, and with eyes open vs. eyes closed. There was an altered body position in PD with greater flexion of the head, shoulder and knee (p≤0.042) and a posterior position of the hip with DBS OFF (p≤0.014). With DBS ON, body position was brought more in line with the position taken by control participants but there was still evidence of greater flexion at the head, shoulder and knee. The amplitude of movement during the vibration period decreased in controls at all measured sites with eyes open and closed (except at the head in old controls with eyes open) showing adaptation which contrasted the weaker adaptive responses in patients with PD. Our findings suggest that alterations of posture and greater forward leaning with repeated calf vibration, are independent from reduced movement amplitude changes. DBS in the STN can significantly improve body position in PD although the effects are not completely reversed. Patients with PD maintain adaptive capabilities by leaning further forward and reducing movement amplitude despite their kyphotic posture.


Assuntos
Adaptação Fisiológica , Estimulação Encefálica Profunda/métodos , Cifose/terapia , Doença de Parkinson/terapia , Equilíbrio Postural/fisiologia , Idoso , Articulação do Tornozelo/fisiologia , Estudos de Casos e Controles , Feminino , Globo Pálido/fisiopatologia , Cabeça/fisiologia , Articulação do Quadril/fisiologia , Humanos , Articulação do Joelho/fisiologia , Cifose/etiologia , Cifose/fisiopatologia , Masculino , Pessoa de Meia-Idade , Movimento/fisiologia , Doença de Parkinson/complicações , Doença de Parkinson/fisiopatologia , Postura/fisiologia , Articulação do Ombro/fisiologia , Núcleo Subtalâmico/fisiopatologia
13.
Sensors (Basel) ; 21(24)2021 Dec 08.
Artigo em Inglês | MEDLINE | ID: mdl-34960275

RESUMO

Nowadays, faces in videos can be easily replaced with the development of deep learning, and these manipulated videos are realistic and cannot be distinguished by human eyes. Some people maliciously use the technology to attack others, especially celebrities and politicians, causing destructive social impacts. Therefore, it is imperative to design an accurate method for detecting face manipulation. However, most of the existing methods adopt single convolutional neural network as the feature extraction module, causing the extracted features to be inconsistent with the human visual mechanism. Moreover, the rich details and semantic information cannot be reflected with single feature, limiting the detection performance. Therefore, this paper tackles the above problems by proposing a novel face manipulation detection method based on a supervised multi-feature fusion attention network (SMFAN). Specifically, the capsule network is used for face manipulation detection, and the SMFAN is added to the original capsule network to extract details of the fake face image. Further, the focal loss is used to realize hard example mining. Finally, the experimental results on the public dataset FaceForensics++ show that the proposed method has better performance.


Assuntos
Cabeça , Redes Neurais de Computação , Humanos
15.
West J Emerg Med ; 22(6): 1301-1310, 2021 Oct 27.
Artigo em Inglês | MEDLINE | ID: mdl-34787555

RESUMO

INTRODUCTION: Dog bites are a significant health concern in the pediatric population. Few studies published to date have stratified the injuries caused by dog bites based on surgical severity to elucidate the contributing risk factors. METHODS: We used an electronic hospital database to identify all patients ≤17 years of age treated for dog bites from 2013-2018. Data related to patient demographics, injury type, intervention, dog breed, and payer source were collected. We extracted socioeconomic data from the American Community Survey. Data related to dog breed was obtained from public records on dog licenses. We calculated descriptive statistics as well as relative risk of dog bite by breed. RESULTS: Of 1,252 injuries identified in 967 pediatric patients, 17.1% required consultation with a surgical specialist for repair. Bites affecting the head/neck region were most common (61.7%) and most likely to require operating room intervention (P = 0.002). The relative risk of a patient being bitten in a low-income area was 2.24, compared with 0.46 in a high-income area. Among cases where the breed of dog responsible for the bite was known, the dog breed most commonly associated with severe bites was the pit bull (relative risk vs German shepherd 8.53, relative risk vs unknown, 3.28). CONCLUSION: The majority of injuries did not require repair and were sufficiently handled by an emergency physician. Repair by a surgical specialist was required <20% of the time, usually for bites affecting the head/neck region. Disparities in the frequency and characteristics of dog bites across socioeconomic levels and dog breeds suggest that public education efforts may decrease the incidence of pediatric dog bites.


Assuntos
Mordeduras e Picadas , Animais , Mordeduras e Picadas/epidemiologia , Mordeduras e Picadas/cirurgia , Criança , Cães , Cabeça , Humanos , Incidência , Estudos Retrospectivos , Fatores de Risco
16.
Zootaxa ; 5030(1): 1-118, 2021 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-34811147

RESUMO

Molecular studies using COI and 28S sequence data strongly identify a clade within the Heterolepismatinae distinct from the majority of species so far sequenced. The independence of the clade is supported by several morphological characters including a glabrous anterior margin to the frons, large trapezoidal thoracic sternites, tarsal trichobothria, long, conical parameres which in some species consist of two segments, and the presence of triangular or rounded subrectangular scales on the femora, tibia and clypeus. This clade is described as a new genus Visma n. gen. containing ten new species V. advenum n. sp., V. bingara n. sp., V. brayi n. sp., V. bundjalung n. sp., V. brigalowsum n. sp., V. capricornia n. sp., V. pallidum n. sp., V. powellheueri n. sp., V. tenebrosum n. sp. and V. xanthorrhoea n. sp.. Heterolepisma stilivarians Silvestri, 1908 is redescribed from the holotype and transferred to the new genus. The remaining H. stilivarians type series is found to be different to the holotype and removed from the type series. It is considered possible that H. annectens Silvestri, 1924 may also belong to this genus. Scanning electron microscopy of scale shape and rib-spacing is shown to be a useful tool to separate at least some species of the genus and considered to have greater potential if well preserved material is available.


Assuntos
Cabeça , Insetos , Animais , Microscopia Eletrônica de Varredura
17.
Stomatologiia (Mosk) ; 100(5): 30-37, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34752031

RESUMO

AIM: The article analyzes the results of treatment of children affected with lesions of blood vessels of the head and neck. The research is aimed at developing and implementing minimally invasive techniques to treat such children. MATERIAL AND METHODS: The study group comprised 4416 patients with hyperplasia of blood vessels (the so-called infantile and congenital hemangiomas) and 397 patients with blood vessel malformations, examined and treated from 1991 to 2020. RESULTS: The paper summarizes developed indications and the results of implementation of effective minimally invasive methods for the treatment of children with vascular lesions: radiofrequency thermal ablation and pulsed dye laser treatment of children with severe forms of arterio-venous malformation in their maxillofacial area and. The treatment is currently the golden standard that provides stable aesthetic results. CONCLUSION: The most optimal and preferred methods of vascular lesions treatment proved to be minimally invasive techniques that include: radiofrequency thermal ablation, interstitial laser coagulation, pulse phototherapy, sclerotherapy and systemic treatment of beta-blockers.


Assuntos
Hemangioma , Malformações Vasculares , Criança , Cabeça , Humanos , Pescoço , Escleroterapia
18.
Sud Med Ekspert ; 64(5): 4-9, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34644025

RESUMO

The history of the development of the Department of Forensic Medicine and law, Pavlov First Leningrad (Saint Petersburg) State Medical University is outlined. The history is presented in the form of the scientific contribution of the heads of the Department of Forensic Medicine to the development of scientific activities of national forensic medicine. The stated period covers 120 years, starting from 1901. The main scientific works, the development of the educational process and expert activity are presented.


Assuntos
Medicina Legal , Universidades , Medicina Legal/educação , Cabeça , História do Século XX , Humanos , Federação Russa
19.
Niger J Clin Pract ; 24(10): 1415-1422, 2021 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-34657004

RESUMO

This review summarizes the development of digital technology in the field of head and neck surgeries. Advances in digital technology assist surgeons during preoperative planning, where they can simulate their surgeries with improvement in the resulting accuracy of the surgery. In addition to digital technologies having many applications in the surgical field, they can be used in medical devices, surgical and educational models, and tissue engineering.


Assuntos
Neoplasias de Cabeça e Pescoço , Procedimentos Cirúrgicos Reconstrutivos , Tecnologia Digital , Cabeça/cirurgia , Neoplasias de Cabeça e Pescoço/cirurgia , Humanos , Pescoço/cirurgia
20.
PLoS One ; 16(10): e0258776, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34665840

RESUMO

BACKGROUND: After cranioplasty, in many cases a not negligible soft tissue defect remains in the temporozygomatical area, also referred to as a hollowing defect of the temple. OBJECTIVE: To assess the precise localization and volume of the hollowing defect, to optimize future cranioplasties. METHODS: CT data of patients who received craniectomy and conventional CAD cranioplasty in our institution between 2012 and 2018 were analyzed. CT datasets prior to craniectomy and after cranioplasty were subtracted to quantify the volume and localization of the defect. RESULTS: Out of 91 patients, 21 had suitable datasets. Five cases had good cosmetic results with no defect visible, 16 patients had an apparent hollowing defect. Their average defect volume was 5.0 cm3 ± 4.5 cm3. The defect localizations were in the area behind the zygomatic process and just below the superior temporal line, covering an area of app. 3x3 cm2. Surgical attempts of temporal muscle restoration were more often found in reports of good results (p<0.01), but also in 50% of reports, whose surgeries resulted in hollowing of the temple. Mean time between the two surgeries was 112 ± 43 days. No significant differences between patients with and without hollowing defect were detected regarding time between the two surgeries, age or performing surgeon. CONCLUSION: This work supplies evidence for the indication of a surgical corrective during cranioplasty in the small but cosmetically relevant area of the "frontozygomatic shadow". Based on our 3D data analysis, future focused surgical strategies may obtain better aesthetical results here.


Assuntos
Craniectomia Descompressiva/efeitos adversos , Cabeça/diagnóstico por imagem , Procedimentos Cirúrgicos Reconstrutivos/métodos , Músculo Temporal/cirurgia , Adulto , Idoso , Feminino , Cabeça/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Tempo para o Tratamento , Tomografia Computadorizada por Raios X , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...