Subacute Horizontal Diplopia, Jaw Dystonia, and Laryngospasm.

Jaw dystonia and laryngospasm in the context of subacute brainstem dysfunction have been described in a small number of diseases, including antineuronal nuclear antibody type 2 (ANNA-2, also known as anti-Ri) paraneoplastic neurologic syndrome. Severe episodes of laryngospasms causing cyanosis are potentially fatal. Jaw dystonia can also cause eating difficulty, resulting in severe weight loss and malnutrition. In this report, we highlight the multidisciplinary management of this syndrome associated with ANNA-2/anti-Ri paraneoplastic neurologic syndrome and discuss its pathogenesis.

Topical Pharyngeal Anesthesia in Sedated Pediatric Patients Undergoing Esophagogastroduodenoscopy.

OBJECTIVES: Pediatric patients undergoing esophagogastroduodenoscopy (EGD) commonly receive procedural sedation for comfort and to facilitate the procedure. EGD with procedural sedation carries the risk of several airway incidents and/or adverse events (AIAE). Topical pharyngeal anesthetics (TPAs) can blunt the airway reflexes and decrease the incidence of laryngospasm but has not been well studied with EGD under procedural sedation. We aimed to study the effect of adding a TPA to propofol-based sedation on the rate of AIAE. METHODS: This is a single-center, retrospective, observational cohort study. We compare AIAE rates (coughing, gagging, apnea, airway obstruction, and laryngospasm) in children who received TPA as part of their propofol-based procedural sedation for EGD with those who did not receive TPA. RESULTS: In 2021, 73 patients received TPA as part of the procedural sedation for EGD and 123 did not. The overall rate of AIAE was high with 75 (38%) patients experiencing 1 or more AIAE. Patients who received benzocaine spray experienced more AIAE than the control group [adjusted odds ratio (aOR) = 1.16; 95% confidence interval (CI): 1.01-1.34; P = 0.037]. Coughing, gagging, apnea with desaturation rates, and laryngospasm were similar in both groups (coughing aOR = 1.01; 95% CI: 0.91-1.13; P = 0.814; gagging aOR = 1.01; 95% CI: 0.91-1.13; P = 0.814; apnea aOR = 0.99; 95% CI: 0.95-1.04; P = 0.688; laryngospasm OR = 1.01; 95% CI: 0.95-1.07; P = 0.71). The rate of airway obstruction requiring jaw thrust was higher in the benzocaine group but did not reach statistical significance (aOR = 1.11; 95% CI: 0.97-1.26; P = 0.133). CONCLUSION: The use of topical pharyngeal benzocaine in children undergoing EGD with propofol-based sedation is associated with a higher overall AIAE rate. Most of the AIAE were mild incidents and only 7 patients experienced true adverse events.

Incidence of post-anesthetic respiratory complications in pediatrics. Observational, single-center study in Medellin, Colombia / Incidencia de complicaciones respiratorias postanestésicas en pacientes pediátricos. Estudio observacional en un hospital en Medellín, Colombia

Abstract Introduction: Post-anesthetic complications, particularly respiratory complications, continue to be a source of concern due to their high frequency, particularly in pediatrics. Objective: To describe the incidence of respiratory complications in the post-anesthesia care unit of an intermediate complexity center during a six-month period, and to explore the variables associated with major respiratory complications. Materials and Methods: Retrospective cohort study based on clinical record reviews. The records of the post-anesthesia care unit of an intermediate complexity pediatric institution located in Medellin, Colombia, were reviewed. This center uses a nursing-based care model that includes patient extubation in the post-anesthesia care unit. Results: The records of 1181 patients were analyzed. The cumulative incidences of major complications were bronchospasm 1.44%, laryngospasm 0.68% and respiratory depression 0.59%. There were no cases of cardiac arrest or acute pulmonary edema. A history of respiratory infection less than 15 days before the procedure, rhinitis and female sex were associated with major respiratory complications. Conclusions: A low frequency of respiratory complications was found during care provided by nursing staff trained in anesthesia recovery and pediatric airway in the post-anesthesia care unit.

Resumen Introducción: Las complicaciones postanestésicas, especialmente las respiratorias, siguen siendo causa de preocupación por su alta frecuencia, en particular, en la población pediátrica. Objetivo: Describir la incidencia de complicaciones respiratorias en la unidad de cuidados postanestésicos de una institución de mediana complejidad, en un período de seis meses y explorar las variables relacionadas con las complicaciones respiratorias mayores. Materiales y métodos: Estudio de cohorte retrospectivo, basado en la valoración de historias clínicas. Se revisaron los registros de la unidad de cuidados postanestésicos de una institución pediátrica de mediana complejidad ubicada en Medellín. Esta institución utiliza un modelo de atención -basado en enfermería- que incluye la extubación del paciente en la unidad de cuidados postanestésicos. Resultados: Se analizaron los registros de 1181 pacientes. La incidencia acumulada de complicaciones mayores fue: broncoespasmo 1,44 %, laringoespasmo 0,68 % y depresión respiratoria 0,59 %. No se presentaron casos de paro cardiaco ni de edema agudo de pulmón. El antecedente de infección respiratoria menor a 15 días, rinitis y sexo femenino se asociaron con complicaciones respiratorias mayores. Conclusiones: Durante la atención en la unidad de cuidados postanestésicos por parte del personal de enfermería entrenado en la recuperación de la anestesia y de la vía aérea de los pacientes pediátricos, se encontró una baja frecuencia de complicaciones respiratorias.

Laringoespasmo reflejo en cirugía urológica pediátrica / Reflex laryngospasm in pediatric urologic surgery

Introducción: El laringoespasmo es una complicación temida por los anestesiólogos. Se asocia a broncoespasmo, hipoxia, arritmias, aspiración del contenido gástrico y paro cardiaco. Es más frecuente en neonatos y lactantes. Está estrechamente vinculado al tipo de cirugía y consiste en un cierre intenso y prolongado de la glotis en respuesta a la estimulación glótica directa o refleja. Objetivo: Describir el tratamiento del laringoespasmo parcial reflejo en un paciente pediátrico durante una intervención urológica. Presentación del caso: Paciente de 18 meses de edad al cual se le realiza meatotomía. Durante la cirugía presenta laringoespasmo parcial reflejo tratado con maniobras físicas. Sin la necesidad de usar medicamento ni vía área mecánica. Conclusiones: Las maniobras utilizadas son seguras y efectivas en el tratamiento del laringoespasmo reflejo sin la necesidad de abordar la vía aérea ni uso de medicamentos, se lograron resultados satisfactorios con una relación riesgo beneficio a favor del paciente(AU)

Introduction: Laryngospasm is a complication feared by anesthesiologists. It is associated with bronchospasm, hypoxia, arrhythmias, aspiration of gastric contents, and cardiac arrest. It is more common among neonates and infants. It is closely related to the type of surgery and consists in an intense and prolonged closure of the glottis in response to direct or reflex glottic stimulation. Objective: To describe the management of reflex partial laryngospasm in a pediatric patient during a urological intervention. Case presentation: 18-month-old patient who received meatotomy. During surgery, he presented reflex partial laryngospasm managed with physical maneuvers, without the need to use medication or the mechanic airways ventilation. Conclusions: The maneuvers used are safe and effective for the management of reflex laryngospasm without the need to address the airway or using of medications. Satisfactory outcomes were achieved with a risk-benefit ratio in favor of the patient(AU)

Population-Based Incidence of Potentially Life-Threatening Complications of Hypocalcemia and the Role of Vitamin D Deficiency.

OBJECTIVES: To determine the incidence of potentially life-threatening complications of hypocalcemia in infants and children in Olmsted County, Minnesota; and to determine if vitamin D deficiency contributed to these events and was, at the time of clinical presentation, considered as a possible cause. STUDY DESIGN: In this population-based descriptive study, data were abstracted from the Rochester Epidemiology Project, a medical record linkage system covering 95% of patients in Olmsted County, Minnesota. Participants were children aged 0-5 years who resided in Olmsted County between January 1, 1996 and June 30, 2017, and who received diagnoses of seizures, cardiomyopathy, cardiac arrest, respiratory arrest, laryngospasm, and/or tetany. The incidence of hypocalcemia plus a potentially life-threatening complication was calculated. RESULTS: Among 15 419 patients aged 0-5 years in Olmsted County during the study period, 1305 had eligible complications: 460 had serum calcium checked within 14 days of presentation and 85 had hypocalcemia. Patients were excluded when causes other than hypocalcemia likely triggered the complication, leaving 16 children whose complication was attributed to hypocalcemia. Three of these 16 patients had a serum 25-hydroxyvitamin D measurement and 2 were deficient (≤6 ng/mL [15 nmol/L]). Among children aged 0-5 years, the incidence of hypocalcemia plus a potentially life-threatening complication was 6.1 per 100 000 person-years (95% CI, 3.5-10.0). CONCLUSIONS: Vitamin D deficiency is an underinvestigated cause of complications of hypocalcemia in children. Serum calcium and 25-hydroxyvitamin D should be measured in children with these complications to identify possibly life-threatening vitamin D deficiency.

Negative pressure pulmonary edema: report of case series and review of the literature / Edema pulmonar por pressão negativa: relato de casos e revisão da literatura

Abstract Background and objectives: Negative pressure pulmonary edema occurs by increased intrathoracic negative pressure following inspiration against obstructed upper airway. The pressure generated is transmitted to the pulmonary capillaries and exceeds the pressure of hydrostatic equilibrium, causing fluid extravasation into the pulmonary parenchyma and alveoli. In anesthesiology, common situations such as laryngospasm and upper airway obstruction can trigger this complication, which presents considerable morbidity and requires immediate diagnosis and propaedeutics. Upper airway patency, noninvasive ventilation with positive pressure, supplemental oxygen and, if necessary, reintubation with mechanical ventilation are the basis of therapy. Case report: Case 1: Male, 52 years old, undergoing appendectomy under general anesthesia with orotracheal intubation, non-depolarizing neuromuscular blocker, reversed with anticholinesterase, presented with laryngospasm after extubation, followed by pulmonary edema. Case 2: Female, 23 years old, undergoing breast reduction under general anesthesia with oro-tracheal intubation, non-depolarizing neuromuscular blocker, reversed with anticholinesterase,presented with inspiration against closed glottis after extubation, was treated with non-invasiveventilation with positive pressure; after 1 hour, she had pulmonary edema. Case 3: Male, 44 yearsold, undergoing ureterolithotripsy under general anesthesia, without neuromuscular blocker,presented with laryngospasm after laryngeal mask removal evolving with pulmonary edema. Case 4: Male, 7 years old, undergoing crude fracture reduction under general anesthesia withorotracheal intubation, non-depolarizing neuromuscular blocker, presented with laryngospasmreversed with non-invasive ventilation with positive pressure after extubation, followed bypulmonary edema. Conclusions: The anesthesiologists should prevent the patient from perform a forced inspirationagainst closed glottis, in addition to being able to recognize and treat cases of negative pressurepulmonary edema.

Resumo Justificativa e objetivos: O edema pulmonar por pressão negativa ocorre por aumento da pressão negativa intratorácica após inspiração contra via aérea superior obstruída. A pressão gerada é transmitida aos capilares pulmonares e supera a pressão de equilíbrio hidrostático, o que causa extravasamento de líquido para o parênquima pulmonar e alvéolos. Em anestesiologia, situações comuns como laringoespasmo e obstrução de via aérea superior podem desencadear essa complicação, que apresenta considerável morbidade e exige diagnóstico e propedêutica imediatos. A desobstrução das vias aéreas superiores, ventilação não invasiva com pressão positiva, oxigênio suplementar e, se necessário reintubação com ventilação mecânica são a base da terapia. Relato de caso: Caso 1: Masculino, 52 anos, submetido a apendicectomia sob anestesia geral com intubação orotraqueal, uso de bloqueador neuromuscular adespolarizante, revertido com anticolinesterásico; apresentou laringoespasmo após extubação, seguido de edema pulmonar. Caso 2: Feminino, 23 anos, submetida a mamoplastia redutora sob anestesia geral com intubação orotraqueal, bloqueador neuromuscular adespolarizante revertido com anticolinesterásico, apresentou inspiração contra glote fechada após extubação, tratada com ventilação não invasiva com pressão positiva; após uma hora apresentou edema pulmonar. Caso 3: Masculino, 44 anos, submetido a ureterolitotripsia sob anestesia geral, sem bloqueador neuromuscular, apresentou laringoespasmo após retirada de máscara laríngea e evoluiu com edema pulmonar. Caso 4: Masculino, sete anos, submetido a redução cruenta de fratura sob anestesia geral com intubação orotraqueal, uso de bloqueador neuromuscular adespolarizante; apresentou laringo-espasmo revertido com ventilação não invasiva com pressão positiva após extubação, seguidode edema pulmonar. Conclusões: O anestesiologista deve evitar que o paciente faça inspiração forçada contra glotefechada, além de ser capaz de reconhecer e tratar os casos de edema pulmonar por pressãonegativa.

[Negative pressure pulmonary edema: report of case series and review of the literature]. / Edema pulmonar por pressão negativa: relato de casos e revisão da literatura.

BACKGROUND AND OBJECTIVES: Negative pressure pulmonary edema occurs by increased intrathoracic negative pressure following inspiration against obstructed upper airway. The pressure generated is transmitted to the pulmonary capillaries and exceeds the pressure of hydrostatic equilibrium, causing fluid extravasation into the pulmonary parenchyma and alveoli. In anesthesiology, common situations such as laryngospasm and upper airway obstruction can trigger this complication, which presents considerable morbidity and requires immediate diagnosis and propaedeutics. Upper airway patency, noninvasive ventilation with positive pressure, supplemental oxygen and, if necessary, reintubation with mechanical ventilation are the basis of therapy. CASE REPORT: Case 1: Male, 52 years old, undergoing appendectomy under general anesthesia with orotracheal intubation, non-depolarizing neuromuscular blocker, reversed with anticholinesterase, presented with laryngospasm after extubation, followed by pulmonary edema. Case 2: Female, 23 years old, undergoing breast reduction under general anesthesia with orotracheal intubation, non-depolarizing neuromuscular blocker, reversed with anticholinesterase, presented with inspiration against closed glottis after extubation, was treated with non-invasive ventilation with positive pressure; after 1 hour, she had pulmonary edema. Case 3: Male, 44 years old, undergoing ureterolithotripsy under general anesthesia, without neuromuscular blocker, presented with laryngospasm after laryngeal mask removal evolving with pulmonary edema. Case 4: Male, 7 years old, undergoing crude fracture reduction under general anesthesia with orotracheal intubation, non-depolarizing neuromuscular blocker, presented with laryngospasm reversed with non-invasive ventilation with positive pressure after extubation, followed by pulmonary edema. CONCLUSIONS: The anesthesiologists should prevent the patient from perform a forced inspiration against closed glottis, in addition to being able to recognize and treat cases of negative pressure pulmonary edema.

Edema pulmonar por presión negativa con máscara laríngea clásica. Presentación de un caso pediátrico / Pulmonary edema due to negative pressure with classical laryngeal mask. Presentation of a pediatric case

RESUMEN El edema pulmonar por presión negativa es una complicación rara y dramática en la anestesia general. Habitualmente ocurre como consecuencia de un laringoespasmo u otra causa de obstrucción de la vía aérea. Se presentó un caso con el objetivo de mostrar los elementos usados para el diagnóstico y tratamiento del edema pulmonar por presión negativa. Paciente de 7 años de edad, femenina, ASA I, operada de metatarso varo funcional con anestesia general balanceada y máscara laríngea clásica # 3. Desarrolló dicho evento adverso durante la recuperación anestésica. El diagnóstico se basó en la disociación toraco abdominal al restablecer la ventilación espontanea, crepitantes en ambos hemitórax, cianosis central, hipoxemia y la presencia de infiltrado difuso bilateral alveolar. Se intubó la tráquea, se controló la ventilación con presión positiva al final de la espiración y se administró furosemida. La paciente fue trasladada a la Unidad de Cuidados Intensivos donde evolucionó satisfactoriamente. Este es un síndrome cuya verdadera incidencia se desconoce debido a la escasa familiarización con el mismo. La evolución de los pacientes es favorable siempre que se establezca el diagnóstico y el tratamiento oportuno (AU).

ABSTRACT Pulmonary edema due to negative pressure is a rare and dramatic complication in general anesthetic. It usually occurs as a consequence of a laryngeal spasm or another cause of respiratory tract obstruction.A case was presented with the aim of showing the elements used for the diagnosis and treatment of the pulmonary edema due to negative pressure. An ASA I, 7-year-old female patient, was operated on a functional metatarsus varus with balanced general anesthetic and classical laryngeal mask number 3. She developed this adverse event during the anesthetic recovery. The diagnosis was based on the thoracoabdominal dissociation when recovering spontaneous ventilation, crepitation in hemithoraxes, central cyanosis, hypoxemia, and alveolar bilateral diffused infiltrate. The trachea was intubated, ventilation was controlled with positive pressure at the end of the expiration and furosemide was administered. The patient was transferred to the Intensive Care Unit where she evolved satisfactorily. This is a syndrome whose true incidence is unknown as a result of the lack of familiarization with it. Patients' evolution is favorable whenever the right diagnosis and treatment are timely established (AU).

Low dose propofol vs. lidocaine for relief of resistant post-extubation laryngospasm in the obstetric patient / Dose baixa de propofol versus lidocaína para alívio de laringoespasmo resistente pós-extubação em paciente obstétrica

Abstract Background Post-extubation laryngospasm is a dangerous complication that should be managed promptly. Standard measures were described for its management. We aimed to compare the efficacy of propofol (0.5 mg.kg-1) vs. lidocaine (1.5 mg.kg-1) for treatment of resistant post-extubation laryngospasm in the obstetric patients, after failure of the standard measures. Method This study was conducted over 2 years on all obstetric patients scheduled for cesarean delivery. Post-extubation laryngospasm was initially managed with a standard protocol (removal of offending stimulus, jaw thrust, positive pressure ventilation with 100% oxygen). When this protocol failed, the tested drug was the second line (lidocaine in the first year and propofol in the second year). Lastly, succinylcholine was used when the tested drug failed. Results In lidocaine group, 5% of parturients developed post-extubation laryngospasm, 31.9% of them were successfully treated via standard protocol, and 68.1% required lidocaine treatment. Among these, 65.6% of patients treated with lidocaine responded successfully and 34.4% required succinylcholine to relieve laryngospasm. In propofol group, 4.7% of parturients developed post-extubation laryngospasm, 30.1% of them were successfully treated via standard protocol, and 69.9% required propofol treatment. Among these, 82.8% of patients treated with propofol responded successfully and 17.2% required succinylcholine to relieve laryngospasm. Conclusion Small dose of propofol (0.5 mg.kg-1) is marginally more effective than lidocaine (1.5 mg.kg-1) for the treatment of resistant post-extubation laryngospasm in obstetric patients, after failure of standard measures and before the use of muscle relaxants.

Resumo Justificativa O laringoespasmo pós-extubação é uma complicação perigosa que deve ser prontamente tratada. Medidas padrão para o seu manejo foram descritas. O nosso objetivo foi comparar a eficácia de propofol (0,5 mg.kg-1) versus lidocaína (1,5 mg.kg-1) no tratamento de laringoespasmo resistente pós-extubação em pacientes obstétricas após falha das medidas padrão. Método Este estudo foi conduzido ao longo de dois anos em todas as pacientes obstétricas programadas para cesariana. O laringoespasmo pós-extubação foi inicialmente tratado com um protocolo padrão (remoção do estímulo ofensivo, protrusão mandibular, ventilação com pressão positiva com oxigênio a 100%). Ao constatar a falha desse protocolo, o fármaco testado foi a segunda opção (lidocaína no primeiro ano e propofol no segundo ano). Por fim, succinilcolina foi usada quando houve falha do fármaco testado. Resultados No grupo lidocaína, 5% das parturientes desenvolveram laringoespasmo pós-extubação, 31,9% delas foram tratadas com sucesso via protocolo padrão e 68,1% precisaram de tratamento com lidocaína, das quais, 65,6% responderam com sucesso ao tratamento com lidocaína e 34,4% precisaram de succinilcolina para alívio do laringoespasmo. No grupo propofol, 4,7% das parturientes desenvolveram laringoespasmo pós-extubação, 30,1% delas foram tratadas com sucesso via protocolo padrão e 69,9% precisaram de tratamento com propofol, das quais, 82,8% responderam com sucesso ao tratamento com propofol e 17,2% precisaram de succinilcolina para alívio do laringoespasmo. Conclusão Uma pequena dose de propofol (0,5 mg.kg-1) é marginalmente mais eficaz do que lidocaína (1,5 mg.kg-1) no tratamento de laringoespasmo resistente pós-extubação em pacientes obstétricas, após falha das medidas padrão e antes do uso de relaxantes musculares.

[Low dose propofol vs. lidocaine for relief of resistant post-extubation laryngospasm in the obstetric patient]. / Dose baixa de propofol versus lidocaína para alívio de laringoespasmo resistente pós­extubação em paciente obstétrica.

BACKGROUND: Post-extubation laryngospasm is a dangerous complication that should be managed promptly. Standard measures were described for its management. We aimed to compare the efficacy of propofol (0.5mg.kg-1) vs. lidocaine (1.5mg.kg-1) for treatment of resistant post-extubation laryngospasm in the obstetric patients, after failure of the standard measures. METHOD: This study was conducted over 2 years on all obstetric patients scheduled for cesarean delivery. Post-extubation laryngospasm was initially managed with a standard protocol (removal of offending stimulus, jaw thrust, positive pressure ventilation with 100% oxygen). When this protocol failed, the tested drug was the second line (lidocaine in the first year and propofol in the second year). Lastly, succinylcholine was used when the tested drug failed. RESULTS: In lidocaine group, 5% of parturients developed post-extubation laryngospasm, 31.9% of them were successfully treated via standard protocol, and 68.1% required lidocaine treatment. 65.6% of patients treated with lidocaine responded successfully and 34.4% required succinylcholine to relieve laryngospasm. In propofol group, 4.7% of parturients developed post-extubation laryngospasm, 30.1% of them were successfully treated via standard protocol, and 69.9% required propofol treatment. 82.8% of patients treated with propofol responded successfully and 17.2% required succinylcholine to relieve laryngospasm. CONCLUSION: Small dose of propofol (0.5mg.kg-1) is marginally more effective than lidocaine (1.5mg.kg-1) for the treatment of resistant post-extubation laryngospasm in obstetric patients, after failure of standard measures and before the use of muscle relaxants.

Laryngospasm in pediatric anesthesia with laryngeal mask vs. endotracheal tube: non-inferiority clinical trial / Laringoespasmo en anestesia pediátrica con el uso de la máscara laríngea vs tubo endotraqueal: Ensayo clínico de no inferioridad

Abstract Introduction: Airway-related problems are the most common perioperative complications in pediatric anesthesia and, among them, the most significant is laryngospasm. The type of device used to secure the airway has been found to be among the factors responsible for this outcome. Objective: To determine whether the use of the classic laryngeal mask (LM) creates a non-inferior risk of laryngospasm compared with the use of the endotracheal tube (ET) in children. Method: Non-inferiority, controlled, double-blind clinical trial with random assignment that included 260 children ages 2 to 14 years, American Society of Anaesthesiology I to III, taken to surgical procedures under general anesthesia. The primary outcome was the development of laryngospasm, and the need to exchange devices, airway trauma, and other respiratory complications were assessed as secondary outcomes. A 10% non-inferiority margin was selected for the difference between the 2 devices. Results: A total of 270 patients were recruited, and 135 were assigned to each group. Laryngospasm occurred in 3.3% of the patients, with an incidence of 5.2% in the LM group versus 1.5% for the ET group, for a difference of 3.7% and a 95% confidence interval (-0.7%, 7.9%). No differences were found among bradycardia, cardiac arrest, and death outcomes. Conclusion: The use of LM in children 2 to 14 years of age taken to various surgical procedures is not inferior or superior to ET in terms of the development of laryngospasm. Trial Resgistration: Clincaltrials.gov, NCT01288248.

Resumen Introducción: Los problemas relacionados con el manejo de la vía aérea son las complicaciones perioperatorias más comunes en la anestesia pediátrica; de ellos, el laringoespasmo es el principal. Dentro de los factores de riesgo se ha encontrado que el tipo de dispositivo empleado para el aseguramiento de la vía aérea puede ser responsable de este desenlace. Objetivo: Determinar si el uso de Máscara Laríngea Clásica (ML) genera un riesgo no inferior al uso de Tubo Endotraqueal (TET) para desarrollar laringoespasmo en niños. Metodología: Ensayo clínico controlado de no inferioridad, ciego único, con asignación aleatoria, que incluyó 260 niños de 2 a 14 años, ASA I-III, sometidos a procedimientos quirúrgicos bajo anestesia general. El desenlace primario fue el desarrollo de laringoespasmo y como desenlaces secundarios se evaluaron la necesidad de cambio de dispositivo, trauma de vía aérea y otras complicaciones respiratorias. Se estableció un margen de no inferioridad del 10% para la diferencia entre ambos dispositivos. Resultados: Se reclutaron 270 pacientes, 135 en cada grupo. El laringoespasmo se presentó en el 3,3% de los pacientes, con una incidencia en el grupo de ML de 5,2% vs 1,5% para TET, con una diferencia de 3,7% un IC del 95%: (-0,7%, 7,9%). No se encontraron diferencias entre los desenlaces de bradicardia, paro cardiaco y muerte. Conclusión: El uso de ML en niños de 2-14 años de edad sometidos a diversos procedimientos quirurgicos no es inferior ni superior al TET para desarrollo de laringoespasmo.

Broncoespasmo e laringoespasmo, controle da crise / Bronchospasm and laringospasm: crisis control

A manutenção da via aérea é de grande importância ao anestesiologista, particularmente durante a indução anestésica e a extubação, pelo maior risco de ocorrência de broncoespasmo e laringoespasmo. Apesar de eventos raros, agregam grande morbidade e mortalidade, sendo relevante a identificação dos fatores de risco, diagnóstico e tratamento de tais eventos.

The maintenance of the airway is of great importance to the anesthesiologist, especially during preoperative induction and extubation, due to higher risk of occurrence of bronchospasm and laryngospasm in these moments. Although rare, these events increase morbidity and mortality, so the anesthesiologist should be prepared to identify the risk factors, diagnosis and treatment of such events.

Concentración espirada final de sevoflurane para retiro de tubo endotraqueal y máscara laríngea sin complicaciones en pacientes pediátricos* / Final expired sevoflurane concentration for removal of endotracheal tube and laryngeal mask without complications in pediatric patients *

Para determinar fracción espirada final de sevoflurane al retirar tubo orotraqueal y máscara laríngea sin compli-caciones en pacientes pediátricos, se elaboró estudio obser-vacional de tipo descriptivo y, transversal, seleccionando un total de 40 pacientes de pediatría quirúrgica (Hospital Universitario de Caracas) para cirugías urológicas y her-nioplastias, distribuidos en grupo T (tubo orotraqueal) y grupo M (máscara laríngea). Premedicados con Midazo-lam recibieron anestesia inhalatoria y bloqueo regional. Mantenimiento: O2/aire 50/50. Concluida la cirugía se retiró dispositivo según parámetros hemodinámicos, clí-nicos y ventilatorios. Hubo diferencias estadísticamente significativas entre ambos dispositivos para presión arte-rial sistólica y diastólica, tiempo retiro del dispositivo de la vía aérea ­ salida del quirófano (TR) y complicaciones, no para fracción espirada. Se concluyó que para retiro de máscara laríngea y tubo orotraqueal, la fracción espirada final de sevoflurane fue de 0,66 y 0,87 respectivamente, siendo la máscara laríngea el dispositivo más recomenda-do por menor TR y menor número de complicaciones (AU)

To determine end-tidal sevoflurane fraction by removing endotracheal tube and laryngeal mask in pediatric patients without complications was developed observational and descriptive, transversal, selecting a total of 40 surgical pedia-tric patients (Hospital Universitario de Caracas) for surgery hernioplasties urological and distributed in group T (endo-tracheal tube) and group M (laryngeal mask). Premedicated with midazolam received inhalation anesthesia and regional blockade. Maintenance: O2/aire 50/50. Completed surgery withdrew device according to hemodynamic parameters, clinical and ventilator. Significant differences between the two devices for systolic and diastolic blood pressure, while removing the device from the air - out of the operating room (TR), and complications, not fractional exhaled. It was con-cluded that removal of laryngeal mask and endotracheal tube, the end-tidal sevoflurane fraction was 0.66 and 0.87 respectively, and the laryngeal mask device smaller than recommended by TR and fewer complications (AU)

[Laryngospasm]. / Laringoespasmo.

BACKGROUND AND OBJECTIVES: Airways management is fundamental for anesthesiologists, especially during induction of anesthesia and after extubation, when laryngeal spasm is more common. The anesthesiologist should know pharyngeal-laryngeal physiology and the risk factors for airways obstruction, since this is a potentially severe complication with a multifactorial etiology that can develop during anesthesia and whose consequences can be catastrophic. A delay in the diagnosis or treatment and its evolution can lead to hypoxemia, acute pulmonary edema, and, eventually, death of the patient. In this context, the objective of this report was to review the measures that should be taken in cases of laryngospasm because adequate oxygenation and ventilation may be compromised in this situation. CONTENTS: This review article presents the mechanisms of airways management, discussing the most relevant aspects and etiology, pathophysiology, treatment, and prevention of laryngospasm. CONCLUSIONS: The literature has several recommendations on the treatment or prevention of laryngospasm, but none of them is completely effective. Due to its severity, further studies on measures to prevent this complication are necessary.

Laringoespasmo / Laringoespasmo / Laryngospasm

JUSTIFICATIVA E OBJETIVOS: A manutenção das vias aéreas é de importância fundamental para os anestesiologistas, particularmente durante a indução da anestesia e após a extubação, quando ocorre mais frequentemente o espasmo da laringe ou laringoespasmo. O anestesiologista deve conhecer a fisiologia do funcionamento faríngeo-laríngeo e os fatores de risco para a obstrução das vias aéreas, pois se trata de complicação potencialmente grave que pode ocorrer durante procedimento anestésico-cirúrgico, de etiologia multifatorial e cujas consequências podem ser nefastas. O atraso no diagnóstico ou tratamento e a evolução do quadro podem levar à hipoxemia, edema agudo do pulmão e eventualmente óbito do paciente. Nesse contexto o objetivo deste artigo foi rever as medidas que devem ser tomadas em situação de laringoespasmo, já que oxigenação e ventilação adequadas podem ficar comprometidas em tal situação. CONTEÚDO: Este artigo de revisão apresenta os mecanismos de manutenção das vias aéreas, discutindo seus aspectos mais relevantes e etiologia, fisiopatologia, tratamento e prevenção do laringoespasmo. CONCLUSÕES: Há muitas recomendações na literatura que visam tratar ou prevenir o desenvolvimento do laringoespasmo, mas nenhuma é completamente eficaz. Devido à sua gravidade, é necessário que sejam realizados mais estudos com enfoque nas medidas de prevenção dessa complicação.

BACKGROUND AND OBJECTIVES: Airways management is fundamental for anesthesiologists, especially during induction of anesthesia and after extubation, when laryngeal spasm is more common. The anesthesiologist should know pharyngeal-laryngeal physiology and the risk factors for airways obstruction, since this is a potentially severe complication with a multifactorial etiology that can develop during anesthesia and whose consequences can be catastrophic. A delay in the diagnosis or treatment and its evolution can lead to hypoxemia, acute pulmonary edema, and, eventually, death of the patient. In this context, the objective of this report was to review the measures that should be taken in cases of laryngospasm because adequate oxygenation and ventilation may be compromised in this situation. CONTENTS: This review article presents the mechanisms of airways management, discussing the most relevant aspects and etiology, pathophysiology, treatment, and prevention of laryngospasm. CONCLUSIONS: The literature has several recommendations on the treatment or prevention of laryngospasm, but none of them is completely effective. Due to its severity, further studies on measures to prevent this complication are necessary.

JUSTIFICATIVA Y OBJETIVOS: El mantenimiento de las vías aéreas tiene una importancia fundamental para los anestesiólogos, particularmente durante la inducción de la anestesia y después de la extubación, cuando ocurre más a menudo el espasmo de la laringe o laringoespasmo. El anestesiólogo debe conocer la fisiología del funcionamiento faríngeo-laríngeo y los factores de riesgo para la obstrucción de las vías aéreas, porque se trata de una complicación potencialmente grave que puede ocurrir durante el procedimiento anestésico quirúrgico, de etiología multifactorial y cuyas consecuencias pueden ser nefastas. El atraso en el diagnóstico o tratamiento y la evolución del cuadro pueden conllevar a la hipoxemia, edema agudo del pulmón y eventualmente al deceso del paciente. En ese sentido, el objetivo de este artículo fue analizar nuevamente las medidas que deben ser tomadas en una situación de laringoespasmo, ya que la oxigenación y la ventilación adecuadas pueden quedar comprometidas en esa situación. CONTENIDO: Este artículo de revisión presenta los mecanismos de mantenimiento de las vías aéreas, discutiendo sus aspectos más relevantes y la etiología, fisiopatología, tratamiento y prevención del laringoespasmo. CONCLUSIONES: Existen muchas recomendaciones en la literatura que objetivan tratar o prevenir el desarrollo del laringoespasmo, pero ninguna de ellas es completamente eficaz. Debido a su gravedad, se hace necesario realizar más estudios con un enfoque en las medidas de prevención de esa complicación.

Prevención de Laringoespasmo en adenoamigdalectomía pediátrica con dosis subhipnóticas del propofol

Se trata de un estudio comparativo, prospectivo, observacional y longitudinal que se realizó en 48 pacientes de ambos sexos, con edades entre 3 y 14 años, ASA I o II, de cirugía programada para amigdalectomía con o sin adenoidectomía, operados bajo anestesia general balanceada, usando para la extubación Solución fisiológica como placebo en un primer grupo de 24 pacientes y dosis subhipnóticas de Propofol en un segundo grupo de 24 pacientes restantes; con el objetivo principal de comprobar la efectividad del uso de el propofol endovenoso a dosis de 0,8mg/kgp previo a la extubación traqueal en la prevención de larinespasmo en adenoamigdalectomia de pacientes pediátricos. En el grupo control se presentaron 6 pacientes con laringoespasmo, de los cuals 3 tuvieron estrido, 2 oclusión laringea y uno cianosis. En el grupo experimental 2 pacientes presentaron laringoespasmo manifestándose con estridor. El grupo etáreo más frecuente en ambos grupos fue de 3 a 8 años.

Treatment of laryngeal spasm in pediatric anesthesia by retroauricular digital pressure. Case report.

BACKGROUND AND OBJECTIVES: Problems with pediatric airways are among the greatest challenges an anesthesiologist can face. Laryngeal spasm, which is twice or three times more frequent in the pediatric population, is paramount. The objective of this work was to report the treatment of laryngeal spasm applying digital pressure on a specific area behind the ear lobe. The technique is old, easy, but little known. It is safe and can be promptly done, and does not require peripheral venous access, which might not be present in some situations. CASE REPORT: We report two cases of pediatric anesthesia, in a three-year old and six month-old patients, who developed laryngeal spasm. Both patients were treated by applying retroauricular digital pressure with immediate improvement of the breathing pattern and arterial oxygen saturation. Since laryngeal spasm is a common and potentially severe complication due to its morbimortality, it requires a safe, effective, and fast treatment. CONCLUSION: The classical treatment of laryngeal spasm includes the administration of 100% oxygen with positive pressure per ventilatory unit (balloon and mask) and, in the absence of response, intravenous succinylcholine, 0.25 to 1 mg x kg(-1). The technique presented here for the treatment of laryngeal spasm is easy to perform, safe and effective, and consists of bilateral digital pressure behind the ear lobes, which reversed the laryngeal spasm in a few seconds, avoiding the development of complications.

Tratamento do laringoespasmo em anestesia pediátrica por digitopressão retroauricular: relato de casos / Tratamiento del laringoespasmo en anestesia pediátrica por digitopresión retroauricular: relato de casos / Treatment of laryngeal spasm in pediatric anesthesia by retroauricular digital pressure: case report

JUSTIFICATIVA E OBJETIVOS: Os problemas com a via aérea pediátrica estão entre os maiores desafios que o anestesiologista pode encontrar em sua prática clínica. Dentre eles, destaca-se o laringoespasmo, que ocorre com freqüência duas a três vezes maior na população pediátrica. O objetivo deste trabalho foi relatar o tratamento de laringoespasmo realizado com digitopressão de ponto localizado atrás do lóbulo da orelha. A técnica é fácil, antiga, porém pouco divulgada. Pode ser utilizada de forma segura e rápida, dispensando o acesso venoso periférico que, em algumas situações, pode estar ausente. RELATO DOS CASOS: Dois casos de anestesia pediátrica em pacientes de 3 anos e de 6 meses de idade, nos quais ocorreu laringoespasmo. Ambos foram tratados apenas com a digitopressão da depressão retroauricular e evoluíram com pronta melhora do padrão respiratório e da saturação arterial de oxigênio. Como o laringoespasmo é complicação comum e potencialmente grave pela sua morbimortalidade, é necessário tratamento seguro, eficaz e rápido. CONCLUSÃO: O tratamento clássico do laringoespasmo é a administração de oxigênio a 100 por cento com pressão positiva por unidade ventilatória (balão e máscara) e, se não houver resposta, administração venosa de 0,25 a 1 mg.kg-1 de succinilcolina. A técnica apresentada para tratamento do laringoespasmo é fácil, segura e eficaz, e realizada com digitopressão bilateral da região localizada atrás do lóbulo das orelhas. O laringoespasmo cedeu em poucos segundos e os pacientes tiveram evolução favorável.

BACKGROUND AND OBJECTIVES: Problems with pediatric airways are among the greatest challenges an anesthesiologist can face. Laryngeal spasm, which is twice or three times more frequent in the pediatric population, is paramount. The objective of this work was to report the treatment of laryngeal spasm applying digital pressure on a specific area behind the ear lobe. The technique is old, easy, but little known. It is safe and can be promptly done, and does not require peripheral venous access, which might not be present in some situations. CASE REPORT: We report two cases of pediatric anesthesia, in a three-year old and six month-old patients, who developed laryngeal spasm. Both patients were treated by applying retroauricular digital pressure with immediate improvement of the breathing pattern and arterial oxygen saturation. Since laryngeal spasm is a common and potentially severe complication due to its morbimortality, it requires a safe, effective, and fast treatment. CONCLUSION: The classical treatment of laryngeal spasm includes the administration of 100 percent oxygen with positive pressure per ventilatory unit (balloon and mask) and, in the absence of response, intravenous succinylcholine, 0.25 to 1 mg.kg-1. The technique presented here for the treatment of laryngeal spasm is easy to perform, safe and effective, and consists of bilateral digital pressure behind the ear lobes, which reversed the laryngeal spasm in a few seconds, avoiding the development of complications.

JUSTIFICATIVA Y OBJETIVOS: Los problemas con la vía aérea pediátrica están entre los más grandes retos que el anestesiólogo puede encontrar en su práctica clínica. Entre ellos se destaca el laringoespasmo, que ocurre con frecuencia de dos a tres veces más en la población pediátrica. El objetivo de este trabajo fue relatar el tratamiento de laringoespasmo realizado con digitopresión de punto localizado detrás del lóbulo de la oreja. La técnica es fácil, antigua, pero poco divulgada. Puede ser utilizada de forma segura y rápida sin necesidad del acceso venoso periférico que, en algunas situaciones, puede estar ausente. RELATO DE LOS CASOS: Dos casos de anestesia pediátrica en pacientes de tres años y de seis meses de edad, en los cuales ocurrió laringoespasmo. Los dos fueron tratados apenas con la digitopresión de la depresión retroauricular y evolucionaron con una rápida mejora del estándar respiratorio y de la saturación arterial de oxígeno. Como el laringoespasmo es una complicación común y potencialmente grave por su morbimortalidad, se hace necesario un tratamiento seguro, eficaz y rápido. CONCLUSIÓN: El tratamiento clásico del laringoespasmo es la administración de oxígeno a 100 por ciento con presión positiva por unidad ventilatoria (globo y máscara) y si no hay respuesta, administración venosa de 0,25 a 1 mg.kg-1 de succinilcolina. La técnica presentada para el tratamiento del laringoespasmo es fácil, segura y eficaz, realizada con digitopresión bilateral de la región localizada detrás del lóbulo de las orejas. El laringoespasmo cedió en pocos segundos y los pacientes tuvieron una evolución favorable.