Diaphragmatic and excursion thickness in newborns using diaphragmatic kinesiology ultrasound: an observational study / Espessura e excursão diafragmática em recém-nascidos usando ultrassonografia cinesiológica do diafragma: um estudo observacional

Abstract Introduction The study of the diaphragm muscle has aroused the interest of physiotherapists who work with kinesiological ultrasonography, but still little explored; however, its findings can contribute to the clinical practice of hospitalized patients in neonatal intensive care units. Objective To measure the excursion and thickening of the diaphragm and describe measurements among neonates, preterm, and full-term. Methods Diaphragmatic kinesiological ultrasonography was performed on hospitalized newborns, in Neonatal Unit Care Unit, placed in supine position in their own bed, on the sixth day of life. Three repeated measurements of the same respiratory cycle were made, both for excursion and for diaphragmatic thickening. Results 37 newborns participated in the study and 25 were premature. The mean weight at the time of collection was 2,307.0 ± 672.76 grams and the gestational age was 35.7 ± 3.3 weeks. Diaphragmatic excursion increased with increasing gestational age (p = 0.01, df = 0.21) in term infants (p = 0.17, df = 0.35). Conclusion There was a positive correlation between diaphragmatic excursion and gestational age. There was no statistically significant difference in the measurements of excursion and inspiratory diaphragm thickening between preterm and term newborns, although pointing to higher measurements in the latter group.

Resumo Introdução O estudo do músculo diafragma tem des-pertado o interesse dos fisioterapeutas que trabalham com ultrassonografia cinesiológica. Ainda pouco explo-rado, contudo, seus achados podem contribuir para a prática clínica dos pacientes internados em unidades de terapia intensiva neonatal (UTIN). Objetivo Mensurar a excursão e o espessamento diafragmático e descrever as medidas entre recém-nascidos prematuros e a termo. Métodos Realizou-se ultrassonografia cinesiológica diafragmática em recém-nascidos internados em UTIN, posicionados em supino em seu próprio leito, no sexto dia de vida. Foram realizadas três medidas repetidas do mesmo ciclo respiratório, tanto da excursão quanto do espessamento diafragmático. Resultados Participaram do estudo 37 recém-nascidos, dos quais 25 eram pre-maturos. O peso no momento da coleta foi de 2.307,0 ± 672,76 gramas e a idade gestacional foi de 35,7 ± 3,3 semanas. A excursão diafragmática aumentou de acordo com o aumento da idade gestacional (p = 0,01; df = 0,21). A espessura variou entre 0,10 e 0,16 cm durante a inspiração nos prematuros e entre 0,11 e 0,19 cm nos nascidos a termo (p = 0,17; df = 0,35). Conclusão Houve correlação positiva entre a excursão diafragmá-tica e a idade gestacional. Não observou-se diferença estatisticamente significativa das medidas de excursão e de espessamento diafragmático inspiratório entre recém-nascidos prematuros e recém-nascidos a termo, embora apontando para maiores medidas neste último grupo.

UDC- COVID 19: herramienta digital para predecir el retiro de la ventilación mecánica invasiva de pacientes con COVID-19

En diciembre de 2019 las Autoridades de la República Popular China, comunicaron a la OMS varios casos de neumonía de etiología desconocida en Wuhan, una ciudad situada en la provincia china de Hubei. Una semana más tarde confirmaron que se trataba de un nuevo coronavirus que fue denominado SARS-CoV-2, este virus causa diversas manifestaciones clínicas englobadas bajo el término COVID-19. El presente trabajo presenta un prototipo de aplicación con el nombre UDC-COVID19 que propone una herramienta digital sobre la base de una revisión actualizada de la evaluación ultrasonográfica del diafragma como elemento predictivo para retirar la ventilación mecánica invasiva en pacientes con COVID-19, proporcionando una excelente herramienta digital para la evaluación de la estructura y función dinámica diafragmática, es precisa, reproducible, sin radiación ionizante, fácil de realizar a la cabecera del paciente y costo efectiva en pacientes críticamente enfermos.

In December 2019, the Authorities of the People's Republic of China reported to the WHO several cases of pneumonia of unknown etiology in Wuhan, a city located in the Chinese province of Hubei. A week later, they confirmed that it was a new coronavirus called SARS-CoV-2, which causes various clinical manifestations encompassed under the term COVID-19. The present work presents an application prototype with the name UDC-COVID19 that proposes a digital tool based on an updated review of the ultrasonographic evaluation of the diaphragm as a predictive element to withdraw invasive mechanical ventilation in patients with COVID-19, providing an excellent digital tool for the evaluation of the diaphragmatic structure and dynamic function since it is precise, reproducible, without ionizing radiation, easy to perform at the patient's bedside and cost effective in critically ill patients; mechanical ventilation.

Medición de la fuerza muscular en adultos como predictor de extubación en Unidades de Cuidados Intensivos. Revisión narrativa / Measurement of muscular strength in adults as a predicator of extubation in intensive care units. Narrative review

Resumen: Introducción: uno de los principales efectos de la ventilación mecánica invasiva es la lesión de los músculos respiratorios, específicamente, sobre el diafragma en el que pueden ocurrir alteraciones estructurales y funcionales que modifican parcial o totalmente su función. Durante la ventilación mecánica se produce un proceso de atrofia por desuso de dicho músculo. Por ello la utilidad clínica de la medición de la fuerza muscular diafragmática es importante para conocer si el paciente tiene la capacidad de activar los mecanismos protectores de la vía aérea para lograr la extubación exitosa y el retiro del ventilador mecánico en el menor tiempo posible. Objetivos: describir la medición de la fuerza muscular como predictor de la extubación en las unidades de cuidados intensivos. Material y métodos: se realizó una revisión de la literatura, entre 2011 y 2022. Resultados: los pacientes que son sometidos a ventilación mecánica invasiva prolongada generalmente desarrollan una afección muscular diafragmática, lo que se convierte en una problemática para el proceso de extubación temprana, por lo cual es vital conocer los métodos de medición de fuerza muscular como predictor de extubación.

Abstract: Introduction: one of the main effects of invasive mechanical ventilation is injury to the respiratory muscles, specifically the diaphragm. In which structural and functional alterations can occur that partially or totally modify its function. During mechanical ventilation, a process of disuse atrophy of said muscle occurs. Therefore, the clinical utility of measuring diaphragmatic muscle strength is important to know if the patient has the ability to activate the protective mechanisms of the airway to achieve successful extubation and removal of the mechanical ventilator in the shortest time possible. Objective: describe the measurement of muscle strength as a predictor of extubation in intensive care units. Material and methods: a literature review was carried out, carried out between 2011 and 2022. Results: patients who are subjected to prolonged mechanical ventilation generally develop a diaphragmatic muscle disorder, becoming a problem for the weaning, for it is important know the methods of measuring muscle strength.

Assessment of diaphragmatic function through surface electromyography in healthy individuais. A cross-section observational study

Introduction: Diaphragmatic surface electromyography is a procedure designed to assess the diaphragm. The physiological values of the electrical activity may have potential use in rehabilitation, sports training, ventilatory support withdrawal in critical care units and follow-up of respiratory disease. Objective: To assess and describe the diaphragmatic function through surface electromyography in a population of individuals during spontaneous and forced breathing. Methods: Observational, exploratory cross-sectional study including subjects with no comorbidities. Diaphragmatic surface EMG was performed measuring the mean quadratic root during tidal volume and vital capacity breathing. The body composition of the participants was also assessed. Results: 28 males and 22 females were included in the study. The mean quadratic root of the tidal volume for two minutes was 13.94 nV for females and 13.31 nV for males. The vital capacity was 23.24 nV for males and 22.4 nV for females. A correlation was identified between the mean quadratic root, weight, and body surface. Conclusions: Mean quadratic root values of tidal volume in two minutes in healthy females and males have been documented. The mean quadratic root values are correlated with the physiological and functional characteristics of the participants.

Introducción: La electromiografía de superficie diafragmática es un procedimiento para la evaluación diafragmática. Los valores fisiológicos de la actividad eléctrica tendrían aplicaciones potenciales en rehabilitación, entrenamiento deportivo, en el retiro ventilatorio en unidades de cuidado crítico y en el seguimiento a patologías respiratorias. Objetivo: Evaluar y describir la función diafragmática a través de electromiografía de superficie diafragmática en una población de sujetos durante la respiración espontánea y la respiración forzada. Métodos: Estudio observacional exploratorio de corte transversal en el que se incluyeron sujetos sin comorbilidades. Se realizó electromiografía de superficie diafragmática midiendo la raíz cuadrática media durante respiraciones de volumen corriente y capacidad vital. Adicionalmente, se valoró la composición corporal de los participantes. Resultados: Se incluyeron 28 hombres y 22 mujeres. La raíz cuadrática media de volumen corriente por dos minutos fue de 13,94 µV para mujeres y 13,31 µV para hombres, mientras que la capacidad vital fue 23,24 µV para hombres y 22,4 µV para mujeres. Se encontró una correlación entre la raíz cuadrática media, el peso y la superficie corporal. Conclusiones: Se han documentado los valores de la raíz cuadrática media de volumen corriente por dos minutos en mujeres y hombres sanos. Los valores de la raíz cuadrática media se correlacionan con características fisiológicas y funcionales de los participantes.

Evaluation of Diaphragmatic Thickness and Dysfunction by Ultrasonography in Mechanically Ventilated Children for Assessment of Extubation Success

Objectives: This study aimed to evaluate diaphragm thickness (DT) and diaphragmatic thickening fraction (DTF) in mechanically ventilated children, and study the association of these measurements with extubation success. Methods: Consecutive children aged one month to 18 years, who required mechanical ventilation (MV) for more than 24 hours at our institution, were enrolled between April, 2019 to October, 2020. Ultrasonographic measurements of DT were documented, and DTF was calculated from baseline (within 24 hours of MV) until 14 days of MV, and up to three days post-extubation. Results: Of the 54 childrenenrolled, 40 underwent planned extubation trial, of which 9 (22.5%) had extubation failure. Pre-extubation and post-extubation DTF between children in extubation-success and extubation-failure groups were comparable (P=0.074). There was no significant difference in the diaphragm atrophy rate between the two groups (P=0.819). Binary logistic regression showed significantly decreased probability of successful extubation with total ventilation duration (P=0.012) and mean DTF% before extubation (P=0.033). Conclusion: Despite evidence of diaphragmatic atrophy in critically ill children receiving mechanical ventilation, there was no significant difference in DTF between extubation success and failure groups.

Dextrocardia y herniación intratorácica del hígado. Una rara entidad / Dextrocardia and Intrathoracic Herniation of the Liver. A Rare Entity

Introducción: la incidencia de dextrocardia como anomalía congénita es menor del 0.01% y la combinación con herniación intratorácica del hígado semejando una neoplasia benigna sin antecedente de trauma toracoabdominal abierto o contuso lo hace aún menos frecuente. Caso clínico: se presenta el caso de paciente femenina de 34 años de edad que consulta por dolor de espalda. Al examen físico, se auscultan ruidos cardíacos en el hemitórax derecho y la radiografía de tórax evidencia dextrocardia e imagen que semeja masa supra diafragmática derecha, la TAC trifásica confirma la presencia de protrusión de un segmento del hígado de forma redondeada a través de un defecto no abierto del hemidiafragma derecho. Su tratamiento ha sido conservador. Conclusión: la combinación de dextrocardia acompañada de herniación de una porción del hígado a través de un defecto del diafragma derecho es una asociación extremadamente rara y los reportes de caso publicados son escasos

Hernia de Morgagni en la edad adulta

Introducción: La hernia de Morgagni es una anomalía congénita rara, responsable del 3% de las hernias diafragmáticas, que provoca opacidades radiológicas paracardíaca y retroesternal que suelen confundirse con otras afecciones. Objetivo: Notificar el caso de un paciente adulto diagnosticado con hernia de Morgagni en el Hospital General Docente "Dr. Antonio Luaces Iraola" de Ciego de Ávila. Caso clínico: Se presenta el caso de un varón de 28 años de edad con antecedentes de contusión torácica severa, que presentó dolor abdominal, dispepsias, dolor recurrente en región baja posterior del hemitórax derecho, falta de aire ligera y tos seca. Con la aplicación de un correcto método clínico se excluyeron otros posibles diagnósticos planteados previamente y se concluyó con estudios imagenológicos como una hernia de Morgagni. Se realizó tratamiento quirúrgico mediante laparotomía convencional. La evolución fue favorable, sin complicaciones posoperatorias y con egreso hospitalario precoz. Conclusiones: Se notificó el caso de un paciente diagnosticado con hernia de Morgagni que constituyó un tipo raro de hernia en adultos, cuyo diagnóstico se debe tener en cuenta en pacientes con manifestaciones clínicas digestivas o respiratorias, que presentan radiopacidad paracardíaca en la radiografía de tórax. Es necesario realizar tratamiento quirúrgico oportuno para prevenir posibles complicaciones.

Introduction: Morgagni's hernia is a rare congenital anomaly, responsible for 3% of diaphragmatic hernias, which causes paracardiac and retrosternal radiological opacities that are often confused with other conditions. Objective: To report the case of an adult patient diagnosed with Morgagni's hernia at "Dr. Antonio Luaces Iraola" General Teaching Hospital from Ciego de Avila. Clinical casereport: We report the case of a 28-year-old man with history of severe chest contusion, who showed abdominal pain, dyspepsia, recurrent pain in the lower posterior region of the right hemithorax, slight shortness of breath, and dry cough. With the use of the correct clinical method, other possible diagnoses were excluded from what was previously raised. Imaging studies concluded to be a Morgagni hernia. Surgical treatment was performed by conventional laparotomy. The evolution was favorable, without postoperative complications and with early hospital discharge. Conclusions: The case of a patient diagnosed with Morgagni's hernia was reported. It constituted a rare type of hernia in adults. Its diagnosis should be taken into account in patients with digestive or respiratory clinical manifestations, showing paracardiac radiopacity on chest X-ray. Timely surgical treatment is necessary to prevent possible complications.

Application of ultrasound diaphragmatic function assessment in guiding mechanical evacuation of patients with mechanical ventilation / 中华急诊医学杂志

Objective:To explore the application value of ultrasound diaphragmatic function assessment in weaning from invasive mechanical ventilation in patients with respiratory failure.Method:Fifty-three patients with acute respiratory failure who underwent mechanical ventilation and weaning in People’s Hospital Affiliated to Ningbo University from January 2020 to February 2022 were selected for research. After weaning conditions, T-tube was used for spontaneous breathing test (SBT). At SBT-30 min, beside ultrasound was used to collect the right diaphragm movement (DE) and diaphragm thickness, and the shallow rapid breathing index (RSBI), diaphragm shallow rapid breathing index (D-RSBI) and diaphragm thickness change rate (DTF) were calculated. According to the outcome of weaning, the patients were divided into the successfully weaned group and unsuccessfully weaned group. All patients’ clinical data were collected, and the relationship between ultrasound parameters and clinical indexes was compared between the two groups The efficiency of each index for predicting the success rate of weaning was analyzed with the receiver operating characteristic (ROC) curve.Results:Fifty-three patients were enrolled in this study, including 36 patients in the successfully weaned group and 17 patients in the unsuccessfully weaned group. DE and DTF in the successfully weaned group were higher than those in the unsuccessfully weaned group (all P<0.05), RSBI and D-RSBI in the successfully weaned group were significantly lower than those in the unsuccessfully weaned group (all P<0.05). ROC curve analysis showed that when the cut-off value of DE, DTF, RSBI and D-RSBI were >1.21 cm, >27.5%, <48.68 times/(min·L) and <1.31 times/(min·mm), the sensitivity of predicting the success of weaning was 69.0%, 97.2%, 83.0% and 83.0% respectively, and the specificity was 59.0%, 47.1%, 94.1% and 94.3%, respectively. Conclusions:The evaluation of ultrasound diaphragmatic function can effectively guide the clinical mechanical ventilation patients to withdraw the machine, and improve the accuracy of predicting the success rate of weaning. Therefore, t ultrasound diaphragmatic function assessment has a high application value in guiding the mechanical evacuation of patients with mechanical ventilation, and can be widely applied in clinical practice.

Enhanced endoplasmic reticulum RyR1 receptor phosphorylation leads to diaphragmatic dysfunction in septic rats / 南方医科大学学报

OBJECTIVE@#To explore the role of endoplasmic reticulum ryanodine receptor 1 (RyR1) expression and phosphorylation in sepsis- induced diaphragm dysfunction.@*METHODS@#Thirty SPF male SD rats were randomized equally into 5 groups, including a sham-operated group, 3 sepsis model groups observed at 6, 12, or 24 h following cecal ligation and perforation (CLP; CLP-6h, CLP-12h, and CLP-24h groups, respectively), and a CLP-24h group with a single intraperitoneal injection of KN- 93 immediately after the operation (CLP-24h+KN-93 group). At the indicated time points, diaphragm samples were collected for measurement of compound muscle action potential (CMAP), fatigue index of the isolated diaphragm and fitted frequencycontraction curves. The protein expression levels of CaMK Ⅱ, RyR1 and P-RyR1 in the diaphragm were detected using Western blotting.@*RESULTS@#In the rat models of sepsis, the amplitude of diaphragm CMAP decreased and its duration increased with time following CLP, and the changes were the most obvious at 24 h and significantly attenuated by KN-93 treatment (P < 0.05). The diaphragm fatigue index increased progressively following CLP (P < 0.05) irrespective of KN- 93 treatment (P>0.05). The frequency-contraction curve of the diaphragm muscle decreased progressively following CLP, and was significantly lower in CLP-24 h group than in CLP-24 h+KN-93 group (P < 0.05). Compared with that in the sham-operated group, RyR1 expression level in the diaphragm was significantly lowered at 24 h (P < 0.05) but not at 6 or 12 following CLP, irrespective of KN-93 treatment; The expression level of P-RyR1 increased gradually with time after CLP, and was significantly lowered by KN-93 treatment at 24 h following CLP (P < 0.05). The expression level of CaMKⅡ increased significantly at 24 h following CLP, and was obviously lowered by KN-93 treatment (P < 0.05).@*CONCLUSION@#Sepsis causes diaphragmatic dysfunction by enhancing CaMK Ⅱ expression and RyR1 receptor phosphorylation in the endoplasmic reticulum of the diaphragm.

Effect of external diaphragm pacing therapy combined with abdominal functional electrical stimulation on respiratory function for stroke patients / 中国康复理论与实践

ObjectiveTo explore the effect of external diaphragm pacing therapy combined with abdominal functional electrical stimulation on respiratory function for stroke patients. MethodsFrom October, 2020 to September, 2022, 54 stroke patients were randomly divided into control group (n = 18), external diaphragm pacing group (n = 18) and combined treatment group (n = 18). All the groups received breathing training, while the external diaphragm pacing group received external diaphragm pacing therapy, and the combined treatment group received external diaphragm pacing and abdominal functional electrical stimulation therapy, for two weeks. They were measured forced vital capacity (FVC), forced expiratory volume in first second (FEV1), ratio of forced expiratory volume in first second in forced vital capacity (FEV1/FVC), peak expiratory flow (PEF), maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) with pulmonary function instrument; measured diaphragmatic excursion (DE) and diaphragmatic thickness (DT) with ultrasound, before and after treatment. ResultsThree cases in the control group, two cases in the external diaphragm pacing group and one case in the combined treatment group dropped off. The FVC, FEV1, PEF, MIP, MEP and DE improved in all the groups (|t| > 3.366, P < 0.01) after treatment; and the FVC, FEV1, MIP and DE increased more in the combined treatment group and the external diaphragm pacing group than in the control group (P < 0.05); the FVC and FEV1 increased more in the combined treatment group than in the external diaphragm pacing group (P < 0.05). ConclusionExternal diaphragm pacing therapy may improve ventilation and inspiratory muscle strength, and increase diaphragm movement for stroke patients; while the ventilation improved more after combining with abdominal functional electrical stimulation.

Diaphragm ultrasound after manual rib cage stabilization maneuver in premature newborns: clinical trial / Ultrassom diafragmático após manobra de estabilização costal manual em recém-nascidos prematuros: ensaio clínico

Abstract Introduction The manual rib cage stabilization maneu-ver (MRCSM) is a physical therapy intervention that promotes stabilization of the zone of apposition of the diaphragm, facilitating the contraction of this muscle and the work of breathing. Objective To evaluate by diaphragm ultrasound the diaphragmatic excursion in premature newborns before and after MRCSM. Methods Before-after clinical trial assessing by diaphragm ultra-sound the effectiveness of MRCSM in the amplitude of diaphragmatic excursions. Results The study sample consisted of 48 premature newborns born at a mean gestational age of 33.0 ± 2.8 weeks with a mean birth weight of 1,904.1 ± 708.9 grams. The newborns were classified in three groups: without respiratory distress syndrome (RDS; n = 26), with RDS (n = 15) and with apnea (n = 7) as a cause of admission to the neonatal intensive care unit (NICU). The measurements of diaphragmatic excursion and thickening were similar in newborns without or with RDS or apnea and there was a significant increase in the amplitude of diaphragmatic excursions after MRCSM (p < 0.001; effect size > 0.68) and less diaphragmatic thickening at exhalation in all of them. The diaphragm thickening fraction was 0.50 (0.33 - 0.72), and the diaphragm thickening rate was 0.04 (0.03 - 0.07). These measurements showed no significant variation with the presence or absence of RDS or apnea (p > 0.05). No significant variations in heart rate (p = 0.30), respiratory rate (p = 0.79), and peripheral oxygen saturation, consid-ering newborns in ambient air (p = 0.17) compared with baseline. Conclusion The MRCSM was effective, safe, and increased the amplitude of diaphragmatic excursion and thickness in premature newborns at one week of age, regardless of the presence or absence of RDS or apnea as a cause of admission to the NICU.

Resumo Introducão A manobra manual de estabilização da caixa torácica (MRCSM) é uma intervenção fisioterapêutica que promove a estabilização da zona de aposição do diafragma, facilitando a contração deste músculo e o trabalho respiratório. Objetivo Avaliar pela ultrassonografia do diafragma a excur-são diafragmática em recém-nascidos prematuros antes e após MRCSM. Métodos Ensaio clínico antes e depois avaliando por ultrassonografia do diafragma a eficácia do MRCSM na amplitude das excursões diafragmáticas. Resultados A amos-tra do estudo foi composta por 48 recém-nascidos prematuros nascidos com idade gestacional média de 33,0 ± 2,8 semanas e peso médio ao nascer de 1904,1 ± 708,9 gramas. Os recém-nascidos foram classificados em três grupos: sem síndrome do desconforto respiratório (SDR; n = 26), com SDR (n = 15) e com apneia (n = 7) como causa de internação na unidade de terapia intensiva neonatal (UTIN) . As medidas de excursão e espessamento diafragmático foram semelhantes em recém-nascidos sem ou com SDR ou apneia e houve aumento significativo na amplitude das excursões diafragmáticas após MRCSM (p < 0,001; tamanho de efeito > 0,68) e menor espes-samento diafragmático na expiração em todos eles. A fração de espessamento do diafragma foi de 0,50 (0,33 - 0,72) e a taxa de espessamento do diafragma foi de 0,04 (0,03 - 0,07). Essas medidas não apresentaram variação significativa com a presença ou ausência de SDR ou apneia (p > 0,05). Não houve variações significativas na frequência cardíaca (p = 0,30), frequência respiratória (p = 0,79), saturação periférica de oxigênio, considerando os recém-nascidos em ar ambiente (p = 0,17) em comparação com o valor basal. Conclusão O MRCSM foi eficaz, seguro e aumentou a amplitude da excursão e espessura diafragmática em recém-nascidos prematuros com uma semana de idade, independentemente da presença ou ausência de SDR ou apneia como causa de admissão na UTIN.

Effects of COVID-19 on diaphragm thickness and physical performance of athletes / Efeitos da COVID-19 na espessura diafragmática e desempenho físico de atletas

Abstract Introduction Studies suggest that diaphragm thickness (DT) is associated with inspiratory muscle strength and consequently, better ventilatory and mechanical efficiency. On the other hand, infectious diseases such as COVID-19 may impact the structure and function of the respiratory system. Objective Assess the association between DT and the physical performance (PP) of athletes and the effects of COVID-19 infection on these parameters. Methods This is a cross-sectional study of 63 athletes of both sexes from different sport modalities (women: 16.67 ± 5.03 years, 52.09 ± 14.01 kg, 155.90 ± 13.86 cm; men: 23.44 ± 9.65 years, 72.24 ± 14.18 kg, 174.84 ± 6.84 cm), submitted to DT assessment using ultrasound, followed by the PP(Yo-Yo) test) to determine maximum oxygen intake (VO2max). Pearson's correlation was used to determine the association between VO2max and DT, and the Student's t-test for differences between athletes with a positive and negative diagnosis for COVID-19. The significance level was set at 5%. Results There was no association between DT and PP (r = 0.30 and p = 0.22) or between athletes unaffected and affected by COVID-19 in relation to DT (57.00 ± 0.26 vs 52.00 ± 0.25%; p = 0.91) and PP (43.88 ± 2.29 vs 38.34 ± 13.61 ml/kg/min; p = 0.69). Conclusion DT was not associated with maximum oxygen intake in athletes. In addition, athletes infected by COVID-19 exhibited no differences in VO2max or DT when compared to nonaffected individuals.

Resumo Introdução Estudos sugerem que a espessura diafrag-mática (ED) está associada à força muscular inspiratória e, consequentemente, à melhor eficiência ventilatória e mecânica. Por outro lado, doenças infecciosas como a COVID-19 podem impactar a estrutura e função do apa-relho respiratório. Objetivo Avaliar a associação entre a ED e o desempenho físico (DF) de atletas e os efeitos da infecção por COVID-19 sobre esses parâmetros. Métodos Trata-se de um estudo transversal envolvendo 63 atletas de diferentes modalidades esportivas, de ambos os sexos (feminino: 16,67 ± 5,03 anos, 52,09 ± 14,01 kg, 155,90 ± 13,86 cm; masculino 23,44 ± 9,65 anos, 72,24 ± 14,18 kg, 174,84 ± 6,84 cm), que foram submetidos à avaliação da ED por meio de ultrassom e, em seguida, ao teste de DF (Yo-Yo test) para determinar o consumo máximo de oxigênio (VO2max). Utilizou-se a correlação de Pearson para verificar a associação entre VO2max e ED, e o teste t de Student para diferenças entre atletas com diagnóstico positivo e negativo para COVID-19. O nível de significância foi ajustado em 5%. Resultados Não houve associação entre ED e DF (r = 0,30 e p = 0,22) e não houve diferença entre os atletas não infectados e infectados por COVID-19 em relação à ED (57,00 ± 0,26 vs 52,00 ± 0,25%; p = 0,91) e DF (43,88 ± 2,29 vs 38,34 ± 13,61 ml/kg/min; p = 0,69). Conclusão A ED não foi associada ao consumo máximo de oxigênio em atletas. Além disso, atletas infectados por COVID-19 não exibiram diferenças no VO2max e ED em relação aos não infectados.

Fate of the Patent False Lumen of the Descending Aorta After Surgical Treatment for Acute Type 1 Aortic Dissection

ABSTRACT Introduction: This study aimed to investigate the factors affecting false lumen patency in the descending thoracic aorta among patients who underwent surgery for acute type 1 aortic dissection. Methods: A total of 112 patients with acute type 1 aortic dissection, with the flap below the diaphragm level, underwent surgery between January 2010 and September 2019. Of these, 60 patients who were followed up for ≥ 12 months and whose computed tomography scans were available were included in this study. The patients were divided into two groups: group I, consists of patent false lumen (n=36), and group II, consists of thrombosed false lumen (n=24). Demographic data, operative techniques, postoperative descending aortic diameters, reintervention, and late mortality were compared between the two groups. Results: The mean follow-up period of all patients was 37.6±26.1 months (range: 12-104). The diameter increase in the proximal and distal descending aorta was significantly higher in the patent false lumen group (5.3±3.7 mm vs. 3.25±2.34 mm; P=0.015; 3.1±2.52 mm vs. 1.9±1.55 mm; P=0.038, respectively). No significant difference in terms of hypertension was found between the two groups during the follow-up period (21 patients, 58.3% vs. 8 patients, 33.3%; P=0.058). A total of 29 patients (48.3%) were found to be hypertensive in the postoperative period. Conclusion: After surgical treatment for acute type 1 aortic dissection, patients should be monitored closely, regardless of whether the false lumen is patent or thrombosed. Mortality and reintervention can be seen in patients with patent false lumen during follow-up.

Inspiratory muscle training can improve the breathing, balance and walking of persons with Parkinson′s disease / 中华物理医学与康复杂志

Objective:To observe any effect of threshold pressure loaded inspiratory muscle training on the balance of persons with Parkinson′s disease (PD).Methods:Forty-eight persons with PD were randomly divided into an observation group and a control group, each of 24. Both groups were given conventional neurological drug treatment and conventional rehabilitation training. The observation group additionally completed inspiratory muscle training using a threshold pressure load trainer, 5 days per week for 8 weeks. Before and after the treatment, both groups′ inspiratory muscle functioning was quantified using ultrasound to assess diaphragm mobility and thickness, and maximum inspiratory pressure (MIP). Balance was quantified using Trunk Injury Scale (TIS) scoring, the Berg Balance Scale (BBS), limits of stability (LOS), and the timed up and go test (TUGT). Walking was evaluated using the 10-metre walk test (10MWT) and the Dynamic Gait Index (DGI).Results:After the treatment all of the indicators had improved significantly in both groups, on average, but those of the observation group were then significantly better. Correlation analysis showed that the difference in MIP of the observation group before and after treatment was significantly negatively correlated with the TUGT and 10MWT times.Conclusion:Threshold pressure loaded inspiratory muscle training combined with conventional rehabilitation therapy significantly improves the inspiratory muscle strength, balance and walking of persons with PD.

Combining respiratory-muscle resistance training with feedback respiratory electrical stimulation improves the diaphragm and pulmonary function of stroke survivors / 中华物理医学与康复杂志

Objective:To document any effect of combining respiratory-muscle resistance training with feedback respiratory electrical stimulation in rehabilitating the diaphragm function and lung function of stroke survivors.Methods:Sixty hemiplegic stroke survivors were randomly assigned to an observation group or a control group, each of 30. Both groups were given conventional rehabilitation, including respiratory-muscle resistance training. The observation group additionally received feedback respiratory electrical stimulation twice a day, six days a week for 3 weeks. Before and after the treatment, ultrasound was used to measure the end-inspiratory and end-expiratory thickness of the diaphragm. Diaphragm movement during quiet breathing and deep breathing was also observed, and the diaphragm thickening fraction was calculated. The incidence of diaphragm dysfunction on the affected and healthy sides of the two groups before and after the treatment was also analyzed and compared.Results:Diaphragm dysfunction on either side had decreased significantly more in the observation group than in the control group after the treatment. The observation group also showed significantly greater average improvement in the thickening functions and in diaphragm movement on both the affected and healthy sides during quiet breathing and deep breathing. All of the pulmonary function indicators improved significantly in both groups after the treatment, but those of the observation group were, on average, significantly better than the control group′s averages.Conclusions:Combining 3 weeks of respiratory muscle resistance training with electrical stimulation feedback can effectively increase the bilateral thickness of the diaphragm and diaphragm movement in deep breathing of hemiplegic stroke survivors. That reduces the incidence of diaphragm dysfunction.

Effect of early off-bed mobility on diaphragm function in intensive care unit patients undergoing mechanical ventilation / 中华危重病急救医学

Objective:To explore the improvement of diaphragm function after early off-bed mobility intervention in intensive care unit (ICU) patients undergoing mechanical ventilation.Methods:A randomized controlled trial was conducted. A total of 147 adult patients undergoing mechanical ventilation admitted to ICU of Affiliated Hospital of Zunyi Medical University from October 2019 to March 2022 were enrolled. The patients were divided into control group and observation group by convenient sampling. Except for the different intervention programs of early mobility, other treatment and nursing of the patients in the two groups were carried out according to ICU routine. Progressive early activities were performed in the control group, while early off-bed mobility was performed in the observation group. The changes of diaphragm thickness at the end of inspiratory (DTei), diaphragm thickness at the end of expiratory (DTee) and diaphragm thickening fraction (DTF) before and 24, 48, 72 and 96 hours of intervention, and the duration of mechanical ventilation, length of ICU stay and 24-hour re-intubation rate after intervention were compared between the two groups.Results:Among the 147 patients, there were 4 cases of detachment in the control group and 5 cases of detachment in the observation group. Finally, 138 patients were enrolled, 69 cases in the control group and 69 cases in the observation group. There was no significant difference in gender, age, diagnosis of ICU, sedatives, muscle strength, ventilator model, acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ) score and DTei, DTee, DTF before intervention between the two groups. The DTei, DTee and DTF in both groups were increased gradually with the extension of intervention time, especially in the observation group [DTei (cm) at 24, 48, 72 and 96 hours of intervention in the observation group were 0.247±0.014, 0.275±0.016, 0.300±0.013 and 0.329±0.013, while in the control group were 0.242±0.015, 0.258±0.013, 0.269±0.014, and 0.290±0.017, effect of time: F = 993.825, P = 0.000, effect of intervention: F = 82.304, P = 0.000, interaction effect between intervention and time: F = 84.457, P = 0.000; DTee (cm) of the observation group were 0.213±0.014, 0.227±0.013, 0.243±0.016, 0.264±0.010, while in the control group were 0.213±0.016, 0.218±0.013, 0.224±0.013, 0.234±0.014, effect of time: F = 385.552, P = 0.000, effect of intervention: F = 28.161, P = 0.000, interaction effect between intervention and time: F = 45.012, P = 0.000; DTF of the observation group were (15.98±4.23)%, (21.35±4.67)%, (24.09±4.44)% and (25.24±3.74)%, while in the control group were (14.17±4.66)%, (18.11±3.92)%, (20.22±4.19)% and (20.98±4.12)%, effect of time: F = 161.552, P = 0.000, effect of intervention: F = 49.224, P = 0.000, interaction effect between intervention and time: F = -4.507, P = 0.000]. The duration of mechanical ventilation and length of ICU stay in the observation group were significantly shorter than those in the control group [duration of mechanical ventilation (hours): 112.68±12.25 vs. 135.32±22.10, length of ICU stay (days): 7.84±1.78 vs. 10.23±2.43, both P < 0.01]. However, there was no significant difference in 24-hour re-intubation rate between the observation group and the control group (0% vs. 2.90%, P > 0.05). Conclusions:Both early off-bed mobility and progressive early activities can prevent diaphragm weakness in ICU patients undergoing mechanical ventilation, and the effect of early off-bed mobility is better. Early off-bed mobility can significantly shorten the duration of mechanical ventilation and length of ICU stay, and it is safe and feasible.

Effect of neurally adjusted ventilatory assist ventilation in severe neurological cerebrovascular diseases patients undergoing mechanical ventilation / 中华危重病急救医学

Objective:To explore the prognostic effect and safety of neurally adjusted ventilatory assist (NAVA) mode on the patients with severe neurological cerebrovascular disease undergoing mechanical ventilation.Methods:A prospective study was conducted. Fifty-four patients with cerebrovascular disease undergoing mechanical ventilation admitted to the neurosurgery intensive care unit (NSICU) of the First Affiliated Hospital of Wannan Medical College (Yijishan Hospital) from December 2020 to May 2022 were enrolled. They were divided into NAVA group and pressure support ventilation (PSV) group by computer random number generator with 27 patients in each group. The ventilation time of the two groups was ≥72 hours. The general basic data of the two groups were recorded. The time without mechanical ventilation 28 days after enrollment, total length of mechanical ventilation, survival rate of 90 days after enrollment, length of NSICU stay, total length of hospital stay, NSICU mortality, in-hospital mortality, Glasgow outcome score (GOS), complications related to mechanical ventilation, and changes of respiratory mechanics indexes, arterial blood gases, vital signs, and diaphragm function indexes were observed.Results:The time without mechanical ventilation 28 days after enrollment in the NAVA group was significantly longer than that in the PSV group [days: 22 (15, 26) vs. 6 (0, 23), P < 0.05]. However, there were no significant differences in the total length of mechanical ventilation, 90-day survival rate, length of NSICU stay, total length of hospital stay, NSICU mortality, in-hospital mortality, GOS score, and incidence of mechanical ventilator-related complications between the two groups. In terms of respiratory mechanics parameters, the expiratory tidal volume (VTe) on 3 days after mechanical ventilation of patients in the NAVA group was significantly lower than that on 1 day and 2 days, and significantly lower than that in the PSV group [mL: 411.0 (385.2, 492.6) vs. 489.0 (451.8, 529.4), P < 0.01]. Minute ventilation (MV) at 2 days and 3 days in the NAVA group was significantly higher than that at 1 day, and significantly higher than that in the PSV group at 2 days [L/min: 9.8 (8.4, 10.9) vs. 7.8 (6.5, 9.8), P < 0.01], while there was no significant change of MV in the PSV group. At 1 day, peak airway pressure (Ppeak) and mean airway pressure (Pmean) in the NAVA group were significantly lower than those in the PSV group [Ppeak (cmH 2O, 1 cmH 2O≈0.098 kPa): 14.0 (12.2, 17.0) vs. 16.6 (15.0, 17.4), Pmean (cmH 2O): 7.0 (6.2, 7.9) vs. 8.0 (7.0, 8.2), both P < 0.05]. However, there was no significant difference in the Ppeak or Pmean at 2 days and 3 days between the two groups. In terms of arterial blood gas, there was no significant difference in pH value between the two groups, but with the extension of mechanical ventilation time, the pH value at 3 days of the two groups was significantly higher than that at 1 day. Arterial partial pressure of oxygen (PaO 2) at 1 day in the NAVA group was significantly lower than that in the PSV group [mmHg (1 mmHg≈0.133 kPa): 122.01±37.77 vs. 144.10±40.39, P < 0.05], but there was no significant difference in PaO 2 at 2 days and 3 days between the two groups. There was no significant difference in arterial partial pressure of carbon dioxide (PaCO 2) or oxygenation index (PaO 2/FiO 2) between the two groups. In terms of vital signs, the respiratory rate (RR) at 1, 2, and 3 days of the NAVA group was significantly higher than that of the PSV group [times/min: 19.2 (16.0, 25.2) vs. 15.0 (14.4, 17.0) at 1 day, 21.4 (16.4, 26.0) vs. 15.8 (14.0, 18.6) at 2 days, 20.6 (17.0, 23.0) vs. 16.7 (15.0, 19.0) at 3 days, all P < 0.01]. In terms of diaphragm function, end-inspiratory diaphragm thickness (DTei) at 3 days in the NAVA group was significantly higher than that in the PSV group [cm: 0.26 (0.22, 0.29) vs. 0.22 (0.19, 0.26), P < 0.05]. There was no significant difference in end-expiratory diaphragm thickness (DTee) between the two groups. The diaphragm thickening fraction (DTF) at 2 days and 3 days in the NAVA group was significantly higher than that in the PSV group [(35.18±12.09)% vs. (26.88±8.33)% at 2 days, (35.54±13.40)% vs. (24.39±9.16)% at 3 days, both P < 0.05]. Conclusions:NAVA mode can be applied in patients with neuro-severe cerebrovascular disease, which can prolong the time without mechanical ventilation support and make patients obtain better lung protective ventilation. At the same time, it has certain advantages in avoiding ventilator-associated diaphragm dysfunction and improving diaphragm function.

Predictive value of diaphragm thickening fraction and intra-abdominal pressure monitoring-oriented risk prediction model for weaning failure in patients with severe acute pancreatitis / 中华危重病急救医学

Objective:To establish a risk prediction model dominated by diaphragm thickening fraction (DTF) and intra-abdominal pressure (IAP) monitoring, and to explore the predictive value of the model for weaning failure in patients with severe acute pancreatitis (SAP).Methods:A prospective research was conducted. Sixty-three patients undergoing invasive mechanical ventilation treatment who diagnosed with SAP admitted to intensive care unit of the First Affiliated Hospital of Jinzhou Medical University from August 2020 to October 2021 were enrolled. The spontaneous breathing trial (SBT) was carried out when the clinical weaning criteria was met. The stable cardiovascular status, good pulmonary function, no chest and abdominal contradictory movement, and adequate oxygenation were defined as successful weaning. Otherwise, it was defined as failure weaning. The clinical indicators such as SBT 30-minure DTF, IAP, tidal volume (VT), respiratory rate (RR), body mass index (BMI), and blood lactic acid (Lac) were compared between the weaning success group and the weaning failure group. The indicators with statistically significant differences in the single-factor analysis were included in the secondary multivariable Logistic regression analysis to establish a risk prediction model. The correlation between the DTF and IAP at 30 minutes of SBT was analyzed. Receiver operator characteristic curve (ROC curve) was drawn to analyze the predictive value of the risk prediction model for SAP patient withdrawal failure at 30 minutes of SBT.Results:Finally, 63 patients with SAP were enrolled. Among the 63 patients, 42 were successfully weaned and 21 failed. There were no significant differences in age, gender, and oxygenation index (PaO 2/FiO 2), sequential organ failure assessment (SOFA) score, acute physiology and chronic health evaluation Ⅱ (APACHEⅡ) score at admission between the two groups, indicating that the data in the two groups were comparable. Compared with the weaning success group, IAP, RR, BMI and Lac at 30 minutes of SBT in the weaning failure group were significantly increased [IAP (mmHg, 1 mmHg≈0.133 kPa): 14.05±3.79 vs. 12.12±3.36, RR (times/min): 25.43±8.10 vs. 22.02±5.05, BMI (kg/m 2): 23.71±2.80 vs. 21.74±3.79, Lac (mmol/L): 5.27±1.69 vs. 4.55±1.09, all P < 0.05], while DTF and VT were significantly decreased [DTF: (29.76±3.45)% vs. (31.86±3.67)%, VT (mL): 379.00±98.74 vs. 413.60±33.68, both P < 0.05]. Secondary multivariable Logistic regression analysis showed that DTF [odds ratio ( OR) = 0.758, 95% confidence interval (95% CI) was 0.584-0.983, P = 0.037], IAP ( OR = 1.276, 95% CI was 1.025-1.582, P = 0.029), and RR ( OR = 1.145, 95% CI was 1.014-1.294, P = 0.029) were independent risk factors for SBT withdrawal failure in 30 minutes in SAP patients. The above risk factors were used to establish the risk prediction model of aircraft withdrawal failure at 30 minutes of SBT: Logit P = -0.237-0.277×DTF+0.242×IAP+0.136×RR. Pearson correlation analysis showed that SBT 30-minute DTF was significantly correlated with IAP in SAP patients, and showed a significant positive correlation ( r = 0.313, P = 0.012). The ROC curve analysis results showed that area under the ROC curve (AUC) of the risk prediction model for SAP patient withdrawal failure at 30 minutes of SBT was 0.716, 95% CI was 0.559-0.873, P = 0.003, with the sensitivity of 85.7% and the specificity of 78.6%. Conclusions:DTF, IAP and RR were independent risk factors for SBT withdrawal failure in 30 minutes in SAP patients. The DTF and IAP monitoring-oriented risk prediction model based on the above three variables has a good predictive value for weaning failure in patients with SAP.

Associação entre área de secção transversa do reto femoral e excursão diafragmática com o desmame de pacientes com traqueostomia na unidade de terapia intensiva / Association between rectus femoris cross-sectional area and diaphragmatic excursion with weaning of tracheostomized patients in the intensive care unit

RESUMO Objetivo: Verificar a relação entre área de secção transversa do reto femoral e excursão diafragmática com sucesso no desmame da ventilação mecânica em pacientes críticos crônicos com traqueostomia. Métodos: Este foi um estudo de coorte observacional prospectivo. Incluímos pacientes críticos crônicos (aqueles submetidos à colocação de traqueostomia após 10 dias de ventilação mecânica). A área de secção transversa do reto femoral e a excursão diafragmática foram obtidas por ultrassonografia realizada dentro das primeiras 48 horas após a traqueostomia. Medimos a área de secção transversa do reto femoral e a excursão diafragmática para avaliar sua associação com o desmame da ventilação mecânica, incluindo sua capacidade de prever o sucesso no desmame e a sobrevida durante toda a internação na unidade de terapia intensiva. Resultados: Foram incluídos 81 pacientes. Quarenta e cinco pacientes (55%) foram desmamados da ventilação mecânica. A mortalidade foi de 42% e 61,7% na unidade de terapia intensiva e hospitalar, respectivamente. O grupo que falhou em relação ao grupo que obteve sucesso no desmame apresentou menor área transversa do reto femoral (1,4 [0,8] versus 1,84 [0,76]cm2, p = 0,014) e menor excursão diafragmática (1,29 ± 0,62 versus 1,62 ± 0,51cm, p = 0,019). Quando a área de secção transversa do reto femoral ≥ 1,80cm2 e a excursão diafragmática ≥ 1,25cm era uma condição combinada, apresentava forte associação com sucesso no desmame (RC ajustada de 20,81; IC95% 2,38 - 182,28; p = 0,006), mas não com sobrevida na unidade de terapia intensiva (RC ajustada de 0,19; IC95% 0,03 - 1,08; p = 0,061). Conclusão: O sucesso no desmame da ventilação mecânica em pacientes críticos crônicos foi associado a medidas maiores de área de secção transversa do reto femoral e da excursão diafragmática.

ABSTRACT Objective: To verify the relationship between the rectus femoris cross-sectional area and diaphragmatic excursion with successful weaning from mechanical ventilation in chronic critically tracheostomized patients. Methods: This was a prospective observational cohort study. We included chronic critically ill patients (those who underwent tracheostomy placement after 10 days under mechanical ventilation). The rectus femoris cross-sectional area and diaphragmatic excursion were obtained by ultrasonography performed within the first 48 hours after tracheostomy. We measured rectus femoris cross-sectional area and diaphragmatic excursion to assess their association with weaning from mechanical ventilation, including their potential to predict successful weaning and survival throughout the intensive care unit stay. Results: Eighty-one patients were included. Forty-five patients (55%) were weaned from mechanical ventilation. The mortality rates were 42% and 61.7% in the intensive care unit and hospital, respectively. The fail group in relation to the success group at weaning presented a lower rectus femoris cross-sectional area (1.4 [0.8] versus 1.84 [0.76]cm2, p = 0.014) and lower diaphragmatic excursion (1.29 ± 0.62 versus 1.62 ± 0.51cm, p = 0.019). When rectus femoris cross-sectional area ≥ 1.80cm2 and diaphragmatic excursion ≥ 1.25cm was a combined condition, it had a strong association with successful weaning (adjusted OR = 20.81, 95%CI 2.38 - 182.28; p = 0.006) but not with intensive care unit survival (adjusted OR = 0.19, 95%CI 0.03 - 1.08; p = 0.061). Conclusion: Successful weaning from mechanical ventilation in chronic critically ill patients was associated with higher measurements of rectus femoris cross-sectional area and diaphragmatic excursion.

Point-of-Care Thoracic Ultrasound in Children with Bronchiolitis

Objective To characterize thoracic (lung and diaphragm) ultrasound fndings in children<2 y with bronchiolitis, evaluate correlation between lung ultrasound severity score (USS) and bronchiolitis severity score (BSS), and study the interobserver agreement of USS between study pediatrician and radiologist. Methods In this prospective observational study, thoracic ultrasound was performed on children with bronchiolitis by the study pediatrician and USS score was assigned. A radiologist blinded to all clinical information, performed an independent thoracic ultrasound. Demographics, clinical course, and other relevant details were recorded. Results Fifty-three children were enrolled; 29/53 patients (54.7%) were classifed as mild bronchiolitis and 24/53 (45.2%) had moderate bronchiolitis as per clinical score; 13.2% (7/53) patients had both anterior and posterior subpleural consolidation and went on to require higher respiratory support either in the form of continuous positive airway pressure in 71.4% (5/7), oxygen for>24 h in 14.2% (1/7), or heated humidifed high-fow nasal cannula in 14.2% (1/7). These results were statistically signifcant (p<0.001). A statistically signifcant correlation was found between the USS and type and duration of respiratory support (p value 0.002) and with the mean duration of hospital stay (p value<0.001). There was signifcant correlation between the BSS and USS (p<0.001). There was a very good agreement between the ultrasound fndings of study pediatrician and radiologist (kappa 0.83). Conclusion The fndings of lung ultrasound (LUS) are not specifc for bronchiolitis. However, LUS can be used as a good prognostic tool in patients with bronchiolitis.