Split cricoideo anterior posterior: una novedosa técnica para evitar la traqueotomía en parálisis cordal bilateral en pacientes pediátricos / Posterior anterior cricoid split: a cutting-edge technique to avoid tracheostomy in bilateral cordal paralysis in pediatric patients

Introducción: La parálisis cordal bilateral en aducción es la segunda causa de estridor congénito y genera una grave obstrucción de la vía aérea, debutando con estridor. La traqueotomía ha sido durante mucho tiempo el gold estándar para el tratamiento de esta afección, no exenta de complicaciones. Existen procedimientos que intentan evitar la traqueotomía, como el split cricoideo anterior posterior endoscópico (SCAPE). Objetivo: Presentar experiencia con SCAPE en pacientes pediátricos como tratamiento alternativo de parálisis cordal bilateral en aducción. Material y Método: Análisis retrospectivo de los resultados quirúrgicos obtenidos en pacientes con parálisis cordal bilateral en aducción tratados con SCAPE entre enero de 2016 y diciembre de 2019 en el Hospital Guillermo Grant Benavente de Concepción, Chile. Resultados: Siete pacientes se sometieron a SCAPE. Todos los pacientes presentaban insuficiencia respiratoria severa, cinco requirieron asistencia ventilatoria mecánica. Seis pacientes tenían el diagnóstico de parálisis cordal bilateral (PCB) congénita y uno PCB secundaria a tumor de tronco cerebral. Cuatro pacientes presentaron comorbilidad de la vía aérea: dos pacientes presentaron estenosis subglótica grado I y dos pacientes presentaron laringomalacia que requirió manejo quirúrgico. Los días promedio de intubación fueron once días. Ningún paciente requirió soporte ventilatorio postoperatorio, sólo un paciente recibió oxigenoterapia nocturna debido a hipoventilación secundaria a lesión de tronco. Ningún paciente ha presentado descompensación respiratoria grave. Un 40% ha recuperado movilidad cordal bilateral. Conclusión: Split cricoideo anteroposterior endoscópico es una alternativa eficaz para tratar el PCB en pacientes pediátricos. Nuestro estudio evidencia que es una alternativa a la traqueotomía, con excelentes resultados y menor morbimortalidad.

Introduction: Bilateral vocal fold paralysis in adduction is the second cause of congenital stridor and generates a serious obstruction of the airway. Tracheostomy has long been the gold standard for the treatment of this condition, but it has inherent complications. There are procedures that try to avoid tracheotomy, such as the endoscopic anterior posterior cricoid split (EAPCS). Aim: Present our experience with EAPCS in pediatric patients as a treatment for bilateral vocal fold paralysis in adduction. Material and Method: Retrospective analysis of the surgical results obtained in patients with bilateral vocal cord paralysis in adduction treated with EAPCS between January 2016 and December 2019 at Guillermo Grant Benavente Hospital in Concepción, Chile. Results: Seven patients underwent EAPCS. All patients had severe respiratory failure, five required mechanical ventilation assistance. Six patients were diagnosed with congenital bilateral cord palsy (BCP) and one BCP secondary to a brainstem tumor. Four patients had airway comorbidity: two patients had grade I subglottic stenosis and two patients had laryngomalacia that required surgical management. The average days of intubation were eleven days. No patient required post op invasive/non-invasive ventilation, only one patient received nocturnal oxygen therapy due to hypoventilation secondary to trunk injury. None of the patients has presented severe respiratory decompensation. Forty percent have recovered bilateral chordal mobility. Conclusion: SCAPE is a cutting-edge and effective alternative to treat PCB in pediatric patients. Our study shows that it is an alternative to tracheotomy, with excellent results and lower morbidity and mortality.

Tratamiento definitivo en traumatismo avulsivo de la región cérvico-facial: presentación de caso clínico / Definitive treatment in avulsive trauma of the cervico-facial region: clinical case report

Resumen Introducción: Las lesiones autoinfligidas por armas de fuego con cañón largo en la zona cérvico-facial no siempre logran consumar el suicidio y pueden ocasionar una herida avulsiva de esta región anatómica. Objetivo: Socializar los beneficios del tratamiento multidisciplinario inmediato en la atención al paciente con traumatismo facial complejo. Caso clínico: Paciente masculino de 60 años de edad con intento autolítico por arma de fuego, con pérdida importante de tejido a nivel mandibular y compromiso de la vía aérea. Resultados: Las distintas etapas de accionar quirúrgico se lograron en las primeras cuatro horas desde que sucedió el incidente. El paciente no presentó complicaciones posoperatorias ni necesidad de una nueva operación. Discusión: En la actualidad existe la tendencia a realizar tratamiento definitivo en un solo tiempo quirúrgico inicial. Conclusión: La intervención inmediata y protocolizada de las especialidades cirugía general, maxilofacial y cirugía plástica-reconstructiva en pacientes con heridas avulsivas de la región cérvico facial pueden lograr un tratamiento definitivo en un único tiempo quirúrgico y con resultados favorables.

Introduction: Self-inflicted injuries by long-barreled firearms in the cervico-facial area do not always succeed in consummating suicide and may result in an avulsive injury of this anatomical region. Aim: Socializing the benefits of the immediate multidisciplinary treatment in the medical care of patients with complex facial trauma. Clinical case: A 60-year-old male patient with an autolytic attempt by firearm, with loss of tissue at the mandibular level, as well as airway compromise. Results: The different stages of the surgical action were achieved during the first four hours since the incident occurred. The patient was discharged without the need for a new surgical procedure. Discussion: Currently there is e tendency to perform definitive treatment in a single initial surgical procedure. Conclusión: The immediate and protocolized intervention of specialties such as General Surgery, Maxillofacial and Plastic-Reconstructive Surgery in patients with avulsive wounds of the cervical-facial region can achieve a definitive treatment in a single surgical time and with favorable results.

Ultrasonido como complemento en el manejo de la vía aérea / Ultrasound as a complement in the management of the airway

OBJECTIVE: To analyze the usefulness of ultrasound (US) as a complement to airway management. An overview of how to obtain a real-time airway ultrasound at the bedside is reviewed and the support for its use is checked against the evidence. MATERIALS AND METHODS: The search was carried out in Pubmed and Medline, yielding 722 articles of interest with different levels of evidence. The literature search was limited to studies conducted in humans, published in English and Spanish between August 2011 and August 2021.35 articles were included in this review. DISCUSSION: The usefulness of ultrasound in the evaluation and management of the airway is analyzed: predictors of difficult airway; cervical airway access; confirmation of tracheal intubation; calculation of endotracheal tube (ETT) size and depth. CONCLUSIONS: Airway ultrasound could be a useful tool for anesthesiologists, emergency physicians and intensivists, which could help improve patient care and safety. However, more research is needed to validate its use.

OBJETIVO: Analizar la utilidad del ultrasonido (US) como complemento al manejo de la vía aérea. Se revisa una descripción general de cómo obtener una ecografía de la vía aérea en tiempo real a la cabecera del paciente y se coteja el respaldo de su utilización con la evidencia. MATERIALES Y MÉTODOS: La búsqueda se realizó en Pubmed y Medline, arrojando 722 artículos de interés con distinto nivel de evidencia. La búsqueda bibliográfica se limitó a estudios realizados en humanos, publicados en inglés y español entre agosto de 2011 y agosto de 2021. Se incluyeron 35 artículos en esta revisión. DISCUSIÓN: Se analiza la utilidad del ultrasonido en la evaluación y manejo de la vía aérea: predictores de vía aérea difícil (VAD); acceso cervical de la vía aérea; confirmación de intubación traqueal; cálculo de tamaño de tubo endotraqueal (TET) y profundidad de éste. CONCLUSIONES: El ultrasonido en la vía aérea podría ser una herramienta útil para anestesiólogos, emergenciólogos e intensivistas, que podrían ayudar a mejorar la atención y la seguridad del paciente. Sin embargo, se necesitan más investigaciones para validar su uso.

Caracterización de estructuras anatómicas de la laringe por ultrasonografía / Characterization of anatomical structures of the larynx by ultrasonography

La laringe es un órgano impar situado en la línea mediana del cuello, compuesto por cartílagos, músculos y ligamentos. La TC y la RM se realizan como técnicas de imagen de primera elección en el estudio de la laringe, no obstante, no están exentas de limitaciones. La ecografía es un método accesible, de alta resolución y presenta una relativa buena visualización de las diferentes estructuras de la laringe. El objetivo del trabajo fue determinar las características de estructuras anatómicas de la laringe identificables ecográficamente. En este trabajo de carácter observacional descriptivo de corte transversal prospectivo se estudiaron 20 pacientes, sin patología laríngea con edades entre 20 y 35 años, ambos sexos. Se realizó ecografía laríngea utilizando transductor ecográfico Phillips® con sonda lineal de 4 a 12 MHz, preset de partes blandas.En todos los casos se pudo identificar y medir los cartílagos tiroides, cricoides y epiglotis; y en gran porcentaje de estos las cuerdas vocales, bandas ventriculares y comisura anterior. El cartílago aritenoides solo fue visible en un 85% de los casos.La ecografía se presenta como un método auxiliar útil en el estudio de la anatomía de la laringe, proponiendo el seguimiento y realización de estudios ulteriores que puedan complementar este estudio y su validez.

The larynx is an odd organ located in the midline of the neck, composed of cartilage, muscles and ligaments. CT and MRI are performed as first-choice imaging techniques in the larynx study; however, they are not without limitations. Ultrasound is an accessible, high-resolution method with a relatively good visualization of the different structures of the larynx. The objective of the work was to determine the characteristics of ultrasoundly identifiable larynx anatomical structures.In this prospective cross-sectional descriptive observational work, 20 patients were studied, without laryngeal pathology aged between 20 and 35 years, both sexes. Laryngeal ultrasound was performed using Phillips® ultrasound transducer with linear probe from 4 to 12 MHz, soft parts presetThyroid cartilage, cricoids and epiglotis could be identified and measured in all cases, and in a large percentage of these the vocal cords, ventricular bands and anterior corner. Aritenoid cartilage was only visible in 85% of cases.Ultrasound is presented as a useful auxiliary method in the study of the anatomy of the larynx, proposing the follow-up and conduct of further studies that may complement this study and its validity

Surgical cricothyroidostomy. Analysis and comparison between teaching and validation models of simulator models.

OBJECTIVE: to compare the acquisition and retention of knowledge about surgical cricothyroidostomy by the rapid four-step technique (RFST), when taught by expository lecture, low fidelity and high-fidelity simulation models. METHODS: ninety medical students at UFPR in the first years of training were randomized assigned into 3 groups, submitted to different teaching methods: 1) expository lectures, 2) low-fidelity simulator model, developed by the research team or 3) high-fidelity simulator model (commercial). The procedure chosen was surgical cricothyroidostomy using the RFST. Soon after lectures, the groups were submitted to a multiple-choice test with 20 questions (P1). Four months later, they underwent another test (P2) with similar content. Analysis of Variance was used to compare the grades of each group in P1 with their grades in P2, and the grades of the 3 groups 2 by 2 in P1 and P2. A multiple comparisons test (post-hoc) was used to check differences within each factor (test and group). Statistical significance was considered when p<0.05. Statistical analysis was performed in the statistical software R version 3.6.1. RESULTS: each group was composed of 30 medical students, without demographic differences between them. The mean scores of the groups of the expositive lecture, of the simulator of low fidelity model and of high-fidelity simulator model in P1 were, respectively, 75.00, 76.09, and 68.79, (p<0.05). In P2 the grades were 69.84, 75.32, 69.46, respectively, (p>0.05). CONCLUSIONS: the simulation of low fidelity model was more effective in learning and knowledge retention, being feasible for RFST cricothyroidostomy training in inexperienced students.

Estudio comparativo de laringes humanas y de cerdos: hacia un modelo de entrenamiento quirúrgico / Comparative study of human and pig larynxes: towards a surgical training model

Introducción: La laringe de cerdo doméstico tiene similitudes con la laringe humana. La capacidad elástica de las cuerdas vocales del cerdo demuestran tener la mayor similitud con la humana comparado con otros animales por lo que se ha propuesto usar las laringes de cerdo como modelo de entrenamiento quirúrgico. Objetivo: Determinar las diferencias y similitudes anatómicas e histológicas entre la laringe del cerdo y la humana. Material y método: Se realizaron mediciones por 4 observadores en 5 laringes porcinas cuyos resultados se compararon con los descritos en la literatura para las laringes humanas. Además se realizaron cortes histológicos para visualizar fibras elásticas, mucinas neutras y mucinas ácidas. Resultados: El cartílago tiroides porcino mide entre las astas superiores 37,55 ±7,30 mm, entre astas inferiores 31,33 ±3,27 mm, desde la prominencia laríngea al borde posterior 34,32 ±7,30 mm. En el cartílago cricoides, desde el borde superior-inferior en el arco anterior 7,28 ±2,21 mm, altura borde superior-inferior pared posterior 27,47 ±3,40 mm, ancho máximo pared posterior 30,99 ±4,51 mm, diámetro interior anteroposterior (borde cefálico) 30,90 ±2,12 mm, diámetro interior anteroposterior (borde caudal) 21,78 ±2,55 mm, diámetro interior derecha-izquierda (borde cefálico) 18,11 ±2,13 mm, diámetro interior derecha-izquierda (borde caudal) 21,10 ±2,40 mm. Histológicamente, la laringe de cerdo y humana presentan leves diferencias en cuanto al epitelio de cada porción de la laringe, a pesar de que el tipo de cartílago es el mismo en ambas especies. Conclusión: Si bien existen diferencias anatómicas e histológicas entre la laringe de cerdo y el humano, el modelo porcino es una alternativa útil, accesible y de bajo costo para el entrenamiento en cirugía laringotraqueal y microcirugía laríngea.

Introduction: The domestic pig larynx has similarities with the human larynx. The elastic capacity of the vocal folds of the pig has the greater similarity with the human one compared with other animals. It has been proposed to use the porcine larynx as a model for surgical training. Aim: To determine the anatomical and histological differences and similarities between the pig larynx and the human larynx. Material and method: Measurements were made by 4 observers in 5 porcine larynxes whose results were compared with those described in the literature. In addition, histological sections were performed to visualize elastic fibers, neutral mucins and acid mucins. Results: The porcine thyroid cartilage measured 37.55 ±7.30 mm between the upper horns, 31.33 ±3.27 mm between lower horns and 34.32 ±7.30 mm from the laryngeal prominence to the posterior margin. In the cricoid cartilage, from the upper-lower edge in the anterior arch 7.28 ±2.21mm, height upper-lower edge posterior wall 27.47 ±3.40 mm, maximum posterior wall width 30.99 ±4.51 mm, anteroposterior inner diameter (head margin) 30.90 ±2.12 mm, inner diameter anteroposterior (caudal edge) 21.78 ±2.55 mm, inner diameter right-left (head edge) 18.11 ±2.13 mm, inner diameter right-left (caudal edge) 21.10 ±2.40 mm. Histologically, the pig and human larynxes present slight differences in the epithelium of each portion of the larynx, despite the fact that type of cartilage is the same in both species. Conclusions: Although there are anatomical and histological differences between the pig larynx and the human larynx, the porcine model is a useful, accessible and low cost alternative for training in laryngotracheal surgery and laryngeal microsurgery.

Angulação do osso hioide e segurança da deglutição pós-laringectomia parcial horizontal supracricóidea e cricohioidoepiglotopexia / Hyoid bone angle and swallowing safety post supracricoid horizontal partial laryngectomy and cricohyoidoepiglottopexy

RESUMO Objetivo investigar o possível impacto da angulação do osso hioide na segurança da deglutição de pacientes submetidos à laringectomia supracricóidea. Métodos série de casos de 13 adultos, entre 48 e 79 anos, majoritariamente homens (n=11), submetidos à laringectomia supracricóidea em pós-operatório inferior ou igual a dez meses. Realizaram videofluoroscopia da deglutição de 5 ml de líquido fino, 5 ml de alimento pastoso e sólido, em livre oferta. A medida do ângulo do osso hioide foi definida por duas linhas: uma tangente à margem superior do corpo do osso hioide e uma tangente ao ponto mais inferior de sua margem inferior, paralela ao plano horizontal da imagem. O desfecho de aspiração durante o exame seguiu a escala desenvolvida por Rosenbek et al. (1996). Resultados Dos 13 pacientes, 5 apresentaram aspiração silente e 8 não apresentaram aspiração. Dos 5 indivíduos com aspiração, apenas 1 manteve preservadas ambas as cartilagens aritenoides em sua reconstrução e a angulação do osso hioide foi abaixo de 60º, em todos os casos. Dos 8 indivíduos sem aspiração laringotraqueal, a maioria (n=5) apresentava as duas cartilagens aritenoides em sua reconstrução e a angulação do osso hioide foi acima de 60º, em todos os casos. Conclusão uma angulação maior que 60º do osso hioide parece favorecer a proteção das vias aéreas inferiores e promover maior segurança do mecanismo de deglutição.

ABSTRACT Purpose to investigate the possible impact of hyoid bone angulation on swallowing safety in patients undergoing supracricoid laryngectomy. Methods the case series comprised 13 adults, between 48 and 79 years-old, male in its majority (n=11), within ten months or less post-supracricoid laryngectomy and cricohyoidoepiglottopexy. All volunteers were submitted to videofluroscopy at rest and during swallowing of 5 ml of thin fluid, 5 ml of pureed consistency and dry solid food. Images were captured in lateral view. The hyoid angle was taken at rest and defined by two lines: a tangent to the upper margin of the body of the hyoid bone and a horizontal line, tangent to the lowest point of its lower margin. The aspiration was assessed using the scale developed by Rosenbek et al. (1996). Results five cases had silent aspiration and eight had no aspiration. In the group with silent aspiration, only one individual had both arytenoid cartilages preserved, while all individuals had the hyoid bone angle below 60º. In the group without aspiration, five individuals had both cricoarytenoids preserved, while all cases had the average hyoid bone angle above 60º. Conclusion the hyoid bone being at an angle greater than 60º seemed to increase the protection of the lower airways, promoting a safer swallowing mechanism.

Surgical cricothyroidostomy. Analysis and comparison between teaching and validation models of simulator models / Cricotireoidostomia cirúrgica. Análise e comparação entre modelos de ensino e validação de simuladores

ABSTRACT Objective: to compare the acquisition and retention of knowledge about surgical cricothyroidostomy by the rapid four-step technique (RFST), when taught by expository lecture, low fidelity and high-fidelity simulation models. Methods: ninety medical students at UFPR in the first years of training were randomized assigned into 3 groups, submitted to different teaching methods: 1) expository lectures, 2) low-fidelity simulator model, developed by the research team or 3) high-fidelity simulator model (commercial). The procedure chosen was surgical cricothyroidostomy using the RFST. Soon after lectures, the groups were submitted to a multiple-choice test with 20 questions (P1). Four months later, they underwent another test (P2) with similar content. Analysis of Variance was used to compare the grades of each group in P1 with their grades in P2, and the grades of the 3 groups 2 by 2 in P1 and P2. A multiple comparisons test (post-hoc) was used to check differences within each factor (test and group). Statistical significance was considered when p<0.05. Statistical analysis was performed in the statistical software R version 3.6.1. Results: each group was composed of 30 medical students, without demographic differences between them. The mean scores of the groups of the expositive lecture, of the simulator of low fidelity model and of high-fidelity simulator model in P1 were, respectively, 75.00, 76.09, and 68.79, (p<0.05). In P2 the grades were 69.84, 75.32, 69.46, respectively, (p>0.05). Conclusions: the simulation of low fidelity model was more effective in learning and knowledge retention, being feasible for RFST cricothyroidostomy training in inexperienced students.

RESUMO Objetivo: comparar a aquisição e retenção de conhecimento, sobre cricotireoidostomia cirúrgica pela técnica rápida de quatro tempos (TRQT), quando ensinada por aula expositiva, simulação de baixa fidelidade e de alta fidelidade. Métodos: noventa alunos de medicina da UFPR dos primeiros anos foram randomizados em 3 grupos: 1) aula expositiva, 2) simulador de baixa fidelidade, ou 3) simulador de alta fidelidade (comercial). O tema exposto foi a cricotireoidostomia cirúrgica pela técnica rápida de quatro tempos (TRQT). Logo após as aulas, os grupos foram submetidos a uma prova de múltipla escolha com 20 questões (P1). Quatro meses após, realizaram uma outra prova (P2), com conteúdo similar. Análise de Variância foi usada para comparar as notas de cada grupo na P1 com suas notas na P2, e as notas dos 3 grupos de 2 a 2 na P1 e na P2. Utilizou-se um teste de comparações múltiplas (post-hoc) para verificar diferenças dentro de cada fator (prova e grupo). Considerou-se significância estatística quando p<0,05. A análise estatística foi feita no software estatístico R versão 3.6.1. Resultados: cada grupo foi composto de 30 estudantes de medicina, sem diferenças demográficas entre os grupos. As notas médias dos grupos da aula expositiva, do modelo de baixa fidelidade e de alta fidelidade na P1 foram, respectivamente, 75,00, 76,09, e 68,79, (p<0,05). Na P2 as notas foram respectivamente 69,84, 75,32, 69,46, (p>0,05). Conclusão: a simulação de baixa fidelidade foi mais eficaz no aprendizado e na retenção de conhecimento, sendo viável para o treinamento de cricotireoidostomia TRQT em alunos inexperientes.

Split cricoídeo posterior endoscópico con injerto de cartílago costal / Endoscopic posterior cricoid split with costal cartilage graft

RESUMEN A pesar de los avances en cirugía de vía aérea, tanto abierta como endoscópica, la inmovilidad bilateral de cuerdas vocales continúa representando un desafio significativo para los cirujanos de vía aérea. Entre las alternativas quirúrgicas existen tanto abordajes endoscópicos como transcervicales, no obstante, la mayoría de estas técnicas modifican estructuralmente regiones de la cuerda vocal y/o aritenoides de manera permanente. La traqueostomía ha sido el tratamiento de elección en niños con inmovilidad bilateral de cuerdas vocales severamente sintomática, sin embargo, el procedimiento ideal debiese establecer una vía aérea adecuada evitando la necesidad de realizar una traqueostomía, y a la vez no generar un deterioro de la función fonatoria. La capacidad de expandir el aspecto glótico posterior sin modificación estructural de aritenoides y/o ligamento vocal ha convertido a la sección cricoidea posterior endoscópica con injerto de cartílago costal en una alternativa quirúrgica atractiva para estos casos. En este trabajo se realiza una revisión de la literatura y presenta un caso tratado mediante esta técnica en el Hospital Guillermo Grant Benavente de Concepción, Chile.

ABSTRACT Despite advances in both open and endoscopic airway surgery, bilateral vocal cord immobility still poses a significant challenge for airway surgeons. Among the surgical alternatives there are both endoscopic and transcervical approaches. However, most of these techniques structurally modify certain regions of the vocal cord and/or arytenoids permanently. Tracheostomy has been the treatment of choice in severely symptomatic children with bilateral immobility of vocal cords. Nevertheless, the ideal procedure should establish an adequate airway, avoiding the need to perform a tracheostomy, and at the same time not causing a deterioration of the phonatory function. The ability to expand the posterior glottis without structural modification of the arytenoids and/or vocal ligament has converted the posterior endoscopic cricoid split with costal cartilage graft into an attractive surgical alternative for these cases. In this article we review the literature and present a case treated by this technique in the Guillermo Grant Benavente Hospital in Concepción, Chile.

Comparison of long-term functional results between standard supracricoid laryngectomy and modified technique with sternohyoid muscle / Comparação de resultados funcionais a longo prazo entre laringectomia padrão supracricoide e técnica modificada com músculo esterno-hióideo

Abstract Introduction: Laryngeal cancer is the most common cancer of the upper respiratory tract. The main methods of treatment included surgery (partial laryngectomy and total laryngectomy) and radiation therapy. Laryngeal dysfunction is seen after both treatment modalities. Objective: The aim of the study is to compare postoperative functional results of the standard supracricoid partial laryngectomy technique and a modified supracricoid partial laryngectomy technique using the sternohyoid muscle. Methods: In total, 29 male patients (average years 58.20 ± 9.00 years; range 41-79 years) with laryngeal squamous cell carcinoma who underwent supra cricoid partial laryngectomy were included. The patients were divided into two groups in terms of the surgical techniques. In Group A, all patients underwent standard supracricoid partial laryngectomy technique between January 2007 and November 2011. In Group B, all patients underwent modified supracricoid partial laryngectomy between August 2010 and November 2011. Fiberoptic endoscopic evaluation of swallowing test, short version of the voice handicap index scores, and the MD Anderson dysphagia inventory, the time of oral feeding and the decanulation of the patients after surgery of each groups were compared. Results: The mean maximum phonation time was 8.68 ± 4.21 s in Group A and 15.24 ± 6.16 s in Group B (p > 0.05). The S/Z (s/s) ratio was 1.23 ± 0.35 in Group A and 1.08 ± 0.26 in Group B (p > 0.05); the voice handicap index averages were 9.86 ± 4.77 in Group A and 12.42 ± 12.54 in Group B (p > 0.05); the fiberoptic endoscopic evaluation of swallowing test averages were calculated as 12.73 ± 3.08 in Group A and 13.64 ± 1.49 in Group B (p > 0.05). In the MD Anderson dysphagia inventory, evaluation of swallowing, the emotional, physical, and functional scores were 29.21 ± 4.11, 32.21 ± 6.85, and 20.14 ± 2.17 in the Group B, and 29.20 ± 2.54, 32.4 ± 4.79, and 19 ± 1.92 in Group A, respectively. Conclusion: Although there is no statistical difference in functional outcome comparisons, if rules are adhered to in preoperative patient selection, modified supracricoid partial laryngectomy can be applied safely and meaningful gains can be achieved in functional outcomes.

Resumo Introdução: O câncer laríngeo é o câncer mais comum do trato respiratório superior. Os principais métodos de tratamento incluem cirurgia (laringectomia parcial e laringectomia total) e radioterapia. A disfunção laríngea é observada em ambas as modalidades de tratamento. Objetivos: Comparar os resultados funcionais pós-operatórios da técnica de laringectomia padrão supracricoide e a técnica de laringectomia supracricoide modificada com o uso do músculo esterno-hióideo. Método: Foram incluídos 29 pacientes do sexo masculino (média de 58,20 ± 9,00 anos, intervalo de 41 a 79) com carcinoma espinocelular de laringe submetidos à laringectomia supracricoide parcial. Os pacientes foram divididos em dois grupos em termos de técnicas cirúrgicas. Todos os pacientes do Grupo A foram submetidos à laringectomia padrão supracricoide entre janeiro de 2007 e novembro de 2011. No Grupo B, todos os pacientes foram submetidos à laringectomia supracricoide modificada entre agosto de 2010 e novembro de 2011. A avaliação endoscópica da deglutição por fibra ótica, os escores da versão curta do Voice Handicap Index e do MD Anderson Dysphagia Inventory, o tempo de alimentação oral e a decanulação dos pacientes foram comparados após a cirurgia em cada grupo. Resultados: A média do tempo máximo de fonação foi de 8,68 ± 4,21 segundos no Grupo A e 15,24 ± 6,16 segundos no Grupo B (p > 0,05). A razão S/Z (seg/seg) foi de 1,23 ± 0,35 no Grupo A e 1,08 ± 0,26 no Grupo B (p > 0,05); as médias do Voice Handicap Index foram 9,86 ± 4,77 no Grupo A e 12,42 ± 12,54 no Grupo B (p > 0,05); as médias da avaliação endoscópica da deglutição por fibra ótica foram calculadas como 12,73 ± 3,08 no Grupo A e 13,64 ± 1,49 no Grupo B (p > 0,05). Na avaliação da deglutição pelo MD Anderson Dysphagia Inventory, os escores emocional, físico e funcional foram 29,21 ± 4,11, 32,21 ± 6,85 e 20,14 ± 2,17 no Grupo B e 29,20 ± 2,54, 32,4 ± 4,79 e 19 ± 1,92 no Grupo A, respectivamente. Conclusão: Embora não haja diferença estatística nas comparações de resultados funcionais, se as regras forem respeitadas na seleção pré-operatória do paciente, a laringectomia supracricoide parcial modificada pode ser aplicada com segurança e ganhos significativos podem ser alcançados em termos de resultados funcionais.

Arch of cricoid cartilage anatomical variation: morphological and radiological aspects.

The cricoid cartilage serves as an anatomical reference for several surgical procedures for access to the airway. Additionally, it serves as an attachment point for muscles that move the vocal folds. We present a case where the cricoid cartilage arch is divided into distinct superior and inferior arches, with a fibrous membrane between them. We did not find any similar description to this case in the literature, which makes it unique to date. This type of variation is important knowledge for clinicians and surgeons during airway management in the anterior neck region. The presence of this variation could induce an error during a palpation of the thyroid and cricoid cartilages, realized in clinical examination and surgical or emergency procedures.

Comparison of long-term functional results between standard supracricoid laryngectomy and modified technique with sternohyoid muscle.

INTRODUCTION: Laryngeal cancer is the most common cancer of the upper respiratory tract. The main methods of treatment included surgery (partial laryngectomy and total laryngectomy) and radiation therapy. Laryngeal dysfunction is seen after both treatment modalities. OBJECTIVE: The aim of the study is to compare postoperative functional results of the standard supracricoid partial laryngectomy technique and a modified supracricoid partial laryngectomy technique using the sternohyoid muscle. METHODS: In total, 29 male patients (average years 58.20±9.00 years; range 41-79 years) with laryngeal squamous cell carcinoma who underwent supra cricoid partial laryngectomy were included. The patients were divided into two groups in terms of the surgical techniques. In Group A, all patients underwent standard supracricoid partial laryngectomy technique between January 2007 and November 2011. In Group B, all patients underwent modified supracricoid partial laryngectomy between August 2010 and November 2011. Fiberoptic endoscopic evaluation of swallowing test, short version of the voice handicap index scores, and the MD Anderson dysphagia inventory, the time of oral feeding and the decanulation of the patients after surgery of each groups were compared. RESULTS: The mean maximum phonation time was 8.68±4.21s in Group A and 15.24±6.16s in Group B (p>0.05). The S/Z (s/s) ratio was 1.23±0.35 in Group A and 1.08±0.26 in Group B (p>0.05); the voice handicap index averages were 9.86±4.77 in Group A and 12.42±12.54 in Group B (p>0.05); the fiberoptic endoscopic evaluation of swallowing test averages were calculated as 12.73±3.08 in Group A and 13.64±1.49 in Group B (p>0.05). In the MD Anderson dysphagia inventory, evaluation of swallowing, the emotional, physical, and functional scores were 29.21±4.11, 32.21±6.85, and 20.14±2.17 in the Group B, and 29.20±2.54, 32.4±4.79, and 19±1.92 in Group A, respectively. CONCLUSION: Although there is no statistical difference in functional outcome comparisons, if rules are adhered to in preoperative patient selection, modified supracricoid partial laryngectomy can be applied safely and meaningful gains can be achieved in functional outcomes.

[Evaluación funcional de deglución-aspiración en pacientes sometidos a laringectomía subtotal supracricoidea con cricohioidoepiglotopexia].

INTRODUCTION: Cardiovascular disease is the main cause of mortality worldwide. In women, its incidence increases at the sixth decade of life, coinciding with postmenopause. Whether this effect is due to menopause-related hormonal changes is not known. OBJECTIVE: To evaluate the differences in cardiovascular risk in pre- and postmenopausal women by means of the Globorisk risk scale, the triglyceride/high-density lipoproteinsHDL cholesterol (Tg/HDL-C) ratio and metabolic syndrome (MS) criteria. METHOD: Cross-sectional study that included 408 women from 40 to 60 years of age; anthropometric measurements and biochemical determinations were performed. The participants were classified as premenopausal and postmenopausal. Cardiovascular risk was assessed using the MS criteria, the Globorisk risk calculator and the Tg/HDL-C ratio. RESULTS: Postmenopausal women showed a significant increase in waist circumference, total cholesterol and triglycerides Tg in comparison with premenopausal women. Significant associations were found between hormonal state and Globorisk-measured cardiovascular risk (OR = 2.50; 95 % CI = 1.67-3.74) and the Tgtriglyceride/HDL-C ratio (OR = 1.66; 95 % CI = 1.09-2.52). CONCLUSION: Cardiovascular risk factors have a higher prevalence in postmenopause. The Globorisk scale and Tg/HDL-C ratio identify cardiovascular risk in postmenopausal women.

INTRODUCCIÓN: La laringectomía subtotal supracricoidea asociada con cricohioidoepiglotopexia es la técnica quirúrgica conservadora más eficiente para preservar las funciones laríngeas de los pacientes con carcinoma localmente avanzado de la laringe. La complicación más temida de esta intervención es la aspiración en el momento de la deglución y la neumonía secundaria; existen diversas formas de evaluar la aspiración y el grado de esta. Presentamos una novedosa forma de identificar incluso pequeñas cantidades de aspiración traqueobronquial. MÉTODO: Se incluyeron pacientes sometidos a laringectomía subtotal y cricohioidoepiglotopexia por cáncer laríngeo; todos evaluados con trago radiactivo posoperatorio. Con base en la sintomatología y resultado del gammagramma se decidió prolongar el tiempo de alimentación por sonda. RESULTADOS: Se incluyeron 37 pacientes, cuatro habían recibido radioterapia; la tasa de aspiración fue de 29.7 %; 50 % de los pacientes que habían recibido radioterapia presentó aspiración y 18 % de los pacientes con aspiración requirió prolongación del tiempo de alimentación por sonda nasogástrica; ninguno necesitó laringectomía total por aspiración que no permitiera la deglución. CONCLUSIONES: La evaluación posoperatoria de pacientes sometidos a laringectomía subtotal con trago radiactivo permite identificar líquido aspirado al árbol bronquial, incluso en cantidades mínimas, y planear el momento para iniciar la deglución.

Endoscopic treatment of acquired subglottic stenosis in children: Predictors of success. / Tratamiento endoscópico de la estenosis subglótica adquirida en los niños: factores predictores del éxito.

Subglottic stenosis is a congenital or acquired disease characterized by the narrowing of the airways, from the vocal cords to the lower border of the cricoid cartilage. It is one of the main causes of stridor and respiratory distress in children. More than 90 % of laryngeal stenoses are acquired due to prolonged endotracheal intubation. The pediatric management of subglottic stenosis is complex and may be affected by different factors that have an impact on the final outcome. Treatment may involve endoscopic procedures and/or open surgeries. Here we describe our experience in 35 patients with acquired subglottic stenosis who underwent endoscopic treatment with rigid dilation and identify the potential predictors of success of this technique.

La estenosis subglótica es una enfermedad congènita o adquirida caracterizada por el estrechamiento de la vía aérea desde las cuerdas vocales hasta el borde inferior del cartílago cricoides. Es una de las principales causas de estridor y dificultad respiratoria en los niños. Más del 90 % de las estenosis laríngeas son adquiridas debido a la intubación endotraqueal prolongada. El manejo de la estenosis subglótica en pediatría es complejo y puede ser influenciado por distintos factores que pueden afectar el resultado final. El tratamiento puede involucrar procedimientos endoscópicos y/o cirugías abiertas. Se describe nuestra experiencia con 35 pacientes con estenosis subglótica adquirida tratados endoscópicamente con dilatación rígida y se identifican potenciales factores predictores del éxito de esta técnica.

Cricoid Pressure During Induction for Tracheal Intubation in Critically Ill Children: A Report From National Emergency Airway Registry for Children.

OBJECTIVES: Cricoid pressure is often used to prevent regurgitation during induction and mask ventilation prior to high-risk tracheal intubation in critically ill children. Clinical data in children showing benefit are limited. Our objective was to evaluate the association between cricoid pressure use and the occurrence of regurgitation during tracheal intubation for critically ill children in PICU. DESIGN: A retrospective cohort study of a multicenter pediatric airway quality improvement registry. SETTINGS: Thirty-five PICUs within general and children's hospitals (29 in the United States, three in Canada, one in Japan, one in Singapore, and one in New Zealand). PATIENTS: Children (< 18 yr) with initial tracheal intubation using direct laryngoscopy in PICUs between July 2010 and December 2015. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Multivariable logistic regression analysis was used to evaluate the association between cricoid pressure use and the occurrence of regurgitation while adjusting for underlying differences in patient and clinical care factors. Of 7,825 events, cricoid pressure was used in 1,819 (23%). Regurgitation was reported in 106 of 7,825 (1.4%) and clinical aspiration in 51 of 7,825 (0.7%). Regurgitation was reported in 35 of 1,819 (1.9%) with cricoid pressure, and 71 of 6,006 (1.2%) without cricoid pressure (unadjusted odds ratio, 1.64; 95% CI, 1.09-2.47; p = 0.018). On multivariable analysis, cricoid pressure was not associated with the occurrence of regurgitation after adjusting for patient, practice, and known regurgitation risk factors (adjusted odds ratio, 1.57; 95% CI, 0.99-2.47; p = 0.054). A sensitivity analysis in propensity score-matched cohorts showed cricoid pressure was associated with a higher regurgitation rate (adjusted odds ratio, 1.01; 95% CI, 1.00-1.02; p = 0.036). CONCLUSIONS: Cricoid pressure during induction and mask ventilation before tracheal intubation in the current ICU practice was not associated with a lower regurgitation rate after adjusting for previously reported confounders. Further studies are needed to determine whether cricoid pressure for specific indication with proper maneuver would be effective in reducing regurgitation events.

Emergency cricothyrotomy: temporary measure or definitive airway? A systematic review / Cricotireoidostomia de emergência: medida contemporizadora ou via aérea definitiva? Uma revisão sistemática

ABSTRACT Being a fast and safe method in the hands of well trained professionals in both prehospital and intrahospital care, Cricothyrotomy has been broadly recommended as the initial surgical airway in the scenario "can't intubate, can't ventilate", and is particularly useful when the obstruction level is above or at the glottis. Its prolonged permanence, however, is an endless source of controversy. In this review we evaluate the complications of cricothyrotomy and the need of its routine conversion to tracheotomy through a search on PubMed, LILACS and SciELO electronic databases with no restriction to the year or language of the publication. In total, we identified 791 references, retrieved 20 full text articles, and included nine studies in our review. The incidence of short-term complications ranged from zero to 31.6%, and the long-term complications, from zero to 7.86%. Subglotic stenosis was the main long-term reported complication, even though it was quite infrequent, occurring only in 2.9 to 5%. The frequency of conversion to tracheostomy varied from zero to 100%. Although a small frequency of long-term complications was found for emergency cricothyrotomy, the studies' low level of evidence does not allow the recommendation of routine use of cricothyrotomy as a secure definitive airway.

RESUMO A cricotireoidostomia, por ser um método rápido e, em geral, realizado com sucesso em ambientes pré e intra-hospitalares por profissionais treinados, tem sido amplamente preconizada como a via aérea cirúrgica inicial diante da situação "impossível intubar, impossível ventilar" e é especificamente útil quando a obstrução das vias aéreas ocorre na glote ou em nível supraglótico. Seu uso prolongado é, contudo, controverso. Nesta revisão procuramos avaliar as complicações da cricotireoidostomia de emergência, bem como, a necessidade rotineira de sua posterior conversão para traqueostomia através de pesquisa de estudos publicados sobre cricotireoidostomia de emergência nas bases de dados PubMed, LILACS e SciELO, sem restrição quanto ao ano de publicação. Assim foram identificados 791 estudos, dos quais 20 foram selecionados para leitura do texto integral, e, destes, nove foram incluídos nesta revisão. A taxa de complicações em curto prazo variou de zero a 31,6%, e a de complicações em longo prazo variou de zero a 7,86%. A estenose subglótica foi a principal complicação em longo prazo, relatada em 2,9 a 5% dos procedimentos. A taxa de conversão para traqueostomia variou de zero a 100%. Apesar da incidência reduzida de complicações em longo prazo o baixo nível de evidência dos estudos revisados não permite recomendar a cricotireoidostomia como uma via aérea definitiva segura.

Extended cricotracheal resection with posterior costochondral grafting for complex pediatric subglottic stenosis.

BACKGROUND AND OBJECTIVE: Severe laryngotracheal stenosis in childhood poses a complex surgical challenge for specialists in airway surgery. Patients with severe subglottic stenosis with vocal cord involvement are particularly difficult to manage successfully. The goal of this work was to review our experience with extended CTR in a cohort of young children with severe SGS and determine which clinical parameters would be associated with surgical success. METHODS: Retrospective analysis of the outcome of consecutive patients with severe glottic-subglottic stenosis submitted to an extended double-stage CTR between 2004 and 2014 at a large tertiary referral center. RESULTS: Twenty-five patients met inclusion criteria, with a mean age of 58.7 months at the time of repair. Overall decannulation rate was 80% (20/25), with a median time to deannulation of 120 days. Seven patients developed post-operative sequelae (4 arytenoid dislocations, 2 re-stenosis, and 1 anterior commissure adhesion). Patients with these sequelae had lower overall specific decannulation (42.8%) compared to those without any sequelae (94.4%) (Chi-square, p = 0.0123) with a longer time to decannulate (logrank, p = 0.0004). Notably, patients presenting with these sequelae on average had undergone a longer duration of post-operative stenting (27.14 days) compared to those presenting without any sequelae (14.8 days) (p = 0.0282). CONCLUSIONS: Extended CTR is an effective method for resolving a majority of severe glottic-subglottic stenosis cases in children. Duration of post-operative stenting may adversely impact overall outcome in these patients.

Analysis of cricoid pressure application: anaesthetic trainee doctors vs. nursing anaesthetic assistants / Análise da aplicação de pressão cricoide: residentes em anestesiologia vs. enfermeiros assistentes de anestesia

ABSTRACT BACKGROUND AND OBJECTIVE: To evaluate the ability of anaesthetic trainee doctors compared to nursing anaesthetic assistants in identifying the cricoid cartilage, applying the appropriate cricoid pressure and producing an adequate laryngeal inlet view. METHODS: Eighty-five participants, 42 anaesthetic trainee doctors and 43 nursing anaesthetic assistants, were asked to complete a set of questionnaires which included the correct amount of force to be applied to the cricoid cartilage. They were then asked to identify the cricoid cartilage and apply the cricoid pressure on an upper airway manikin placed on a weighing scale, and the pressure was recorded. Subsequently they applied cricoid pressure on actual anaesthetized patients following rapid sequence induction. Details regarding the cricoid pressure application and the Cormack-Lehane classification of the laryngeal view were recorded. RESULTS: The anaesthetic trainee doctors were significantly better than the nursing anaesthetic assistants in identifying the cricoid cartilage (95.2% vs. 55.8%, p = 0.001). However, both groups were equally poor in the knowledge about the amount of cricoid pressure force required (11.9% vs. 9.3% respectively) and in the correct application of cricoid pressure (16.7% vs. 20.9% respectively). The three-finger technique was performed by 85.7% of the anaesthetic trainee doctors and 65.1% of the nursing anaesthetic assistants (p = 0.03). There were no significant differences in the Cormack-Lehane view between both groups. CONCLUSION: The anaesthetic trainee doctors were better than the nursing anaesthetic assistants in cricoid cartilage identification but both groups were equally poor in their knowledge and application of cricoid pressure.

RESUMO JUSTIFICATIVA E OBJETIVO: Avaliar a capacidade de residentes em anestesiologia em comparação com enfermeiros assistentes de enfermagem para identificar a cartilagem cricoide, aplicar a pressão cricoide adequada e produzir uma vista adequada da entrada da laringe. MÉTODOS: Foram convidados 85 participantes, 42 residentes em anestesiologia e 43 enfermeiros assistentes de enfermagem a responder questionários sobre a quantidade correta de força a ser aplicada na cartilagem cricoide. Os participantes deviam identificar a cartilagem cricoide e aplicar a pressão cricoide em modelos de vias aéreas superiores colocados sobre uma balança de pesagem e a pressão era registada. Posteriormente, aplicaram pressão cricoide em pacientes anestesiados reais após a indução de sequência rápida. Os detalhes sobre a aplicação de pressão cricoide e a classificação de Cormack-Lehane da visibilidade da laringe foram registrados. RESULTADOS: Os residentes em anestesiologia foram significativamente melhores do que os enfermeiros assistentes de enfermagem na identificação da cartilagem cricoide (95,2% vs. 55,8%, p = 0,001). No entanto, o conhecimento de ambos os grupos era precário sobre a quantidade de força necessária para aplicar a pressão cricoide (11,9% vs. 9,3%, respectivamente) e a correta aplicação da pressão cricoide (16,7% vs. 20,9%, respectivamente). A técnica de três dedos foi aplicada por 85,7% dos residentes em anestesiologia e 65,1% dos enfermeiros assistentes de enfermagem (p = 0,03). Não houve diferença significativa entre os dois grupos em relação à classificação de Cormack-Lehane para a visão. CONCLUSÃO: Os residentes em anestesiologia foram melhores do que os enfermeiros assistentes de enfermagem para identificar a cartilagem cricoide, mas ambos os grupos apresentaram um conhecimento igualmente precário sobre a aplicação de pressão cricoide.

Analysis of cricoid pressure application: anaesthetic trainee doctors vs. nursing anaesthetic assistants.

BACKGROUND AND OBJECTIVE: To evaluate the ability of anaesthetic trainee doctors compared to nursing anaesthetic assistants in identifying the cricoid cartilage, applying the appropriate cricoid pressure and producing an adequate laryngeal inlet view. METHODS: Eighty-five participants, 42 anaesthetic trainee doctors and 43 nursing anaesthetic assistants, were asked to complete a set of questionnaires which included the correct amount of force to be applied to the cricoid cartilage. They were then asked to identify the cricoid cartilage and apply the cricoid pressure on an upper airway manikin placed on a weighing scale, and the pressure was recorded. Subsequently they applied cricoid pressure on actual anaesthetized patients following rapid sequence induction. Details regarding the cricoid pressure application and the Cormack-Lehane classification of the laryngeal view were recorded. RESULTS: The anaesthetic trainee doctors were significantly better than the nursing anaesthetic assistants in identifying the cricoid cartilage (95.2% vs. 55.8%, p=0.001). However, both groups were equally poor in the knowledge about the amount of cricoid pressure force required (11.9% vs. 9.3% respectively) and in the correct application of cricoid pressure (16.7% vs. 20.9% respectively). The three-finger technique was performed by 85.7% of the anaesthetic trainee doctors and 65.1% of the nursing anaesthetic assistants (p=0.03). There were no significant differences in the Cormack-Lehane view between both groups. CONCLUSION: The anaesthetic trainee doctors were better than the nursing anaesthetic assistants in cricoid cartilage identification but both groups were equally poor in their knowledge and application of cricoid pressure.