Corrigendum for health-related quality of life and hospitalizations in chronic thromboembolic pulmonary hypertension versus idiopathic pulmonary arterial hypertension: And analysis from the Pulmonary Hypertension Association Registry.

[This corrects the article DOI: 10.1177/20458940211053196.].

Global quantitative analysis of phosphorylation underlying phencyclidine signaling and sensorimotor gating in the prefrontal cortex.

Prepulse inhibition (PPI) is an example of sensorimotor gating and deficits in PPI have been demonstrated in schizophrenia patients. Phencyclidine (PCP) suppression of PPI in animals has been studied to elucidate the pathological elements of schizophrenia. However, the molecular mechanisms underlying PCP treatment or PPI in the brain are still poorly understood. In this study, quantitative phosphoproteomic analysis was performed on the prefrontal cortex from rats that were subjected to PPI after being systemically injected with PCP or saline. PCP downregulated phosphorylation events were significantly enriched in proteins associated with long-term potentiation (LTP). Importantly, this data set identifies functionally novel phosphorylation sites on known LTP-associated signaling molecules. In addition, mutagenesis of a significantly altered phosphorylation site on xCT (SLC7A11), the light chain of system xc-, the cystine/glutamate antiporter, suggests that PCP also regulates the activity of this protein. Finally, new insights were also derived on PPI signaling independent of PCP treatment. This is the first quantitative phosphorylation proteomic analysis providing new molecular insights into sensorimotor gating.

Taponamiento cardiaco secundario a fibrinólisis con dosis bajas de rt-PA / Perioperative haemodynamic complications of ectopia cordis

No disponible

Avances en la monitorización de la sedoanalgesia / Advances in monitoring of sedoanalgesia

No disponible

Does treatment response to ambrisentan vary by pulmonary arterial hypertension severity? Implications for clinicians and for the design of future clinical trials.

BACKGROUND: Recent clinical trials in pulmonary arterial hypertension have included World Health Organization functional classes I and II patients. However, the impact of baseline functional class and other measures of severity on outcomes has not been evaluated in detail. METHODS: Outcomes at 12 weeks for patients grouped by functional class, haemodynamics, brain natriuretic peptide (BNP) level and 6-min walk distance (6MWD) were evaluated for patients in the Ambrisentan in Pulmonary Arterial Hypertension, Randomized, Double-Blind, Placebo-Controlled, Multicenter Efficacy Study 1 and 2 (ARIES)-1 and 2 pivotal trials of ambrisentan, a once-daily oral endothelin-1 antagonist. Long-term outcomes in the ARIES-E extension study were also evaluated. RESULTS: At 12 weeks, ambrisentan-treated patients with both early and late functional class showed similar improvement in 6MWD relative to placebo. However, patients with more severe disease tended to have greater improvement in 6MWD after grouping by other measures of severity. This included higher baseline BNP level, shorter baseline 6MWD and more severe baseline haemodynamics (p < 0.05 for BNP and p = NS for other comparisons, analysed as interaction terms). During long-term open label follow-up, maintenance of 6MWD improvement, freedom from clinical worsening and survival were also numerically worse for patients who were functional class III/IV at baseline. CONCLUSIONS: Patients with both less severe and more severe PAH benefited from ambrisentan therapy vs. placebo in 12-week clinical trials and during long-term follow up, but greater improvement vs. placebo was seen for those with higher BNP levels.

Spanish human proteome project: dissection of chromosome 16.

The Chromosome 16 Consortium forms part of the Human Proteome Project that aims to develop an entire map of the proteins encoded by the human genome following a chromosome-centric strategy (C-HPP) to make progress in the understanding of human biology in health and disease (B/D-HPP). A Spanish consortium of 16 laboratories was organized into five working groups: Protein/Antibody microarrays, protein expression and Peptide Standard, S/MRM, Protein Sequencing, Bioinformatics and Clinical healthcare, and Biobanking. The project is conceived on a multicenter configuration, assuming the standards and integration procedures already available in ProteoRed-ISCIII, which is encompassed within HUPO initiatives. The products of the 870 protein coding genes in chromosome 16 were analyzed in Jurkat T lymphocyte cells, MCF-7 epithelial cells, and the CCD18 fibroblast cell line as it is theoretically expected that most chromosome 16 protein coding genes are expressed in at least one of these. The transcriptome and proteome of these cell lines was studied using gene expression microarray and shotgun proteomics approaches, indicating an ample coverage of chromosome 16. With regard to the B/D section, the main research areas have been adopted and a biobanking initiative has been designed to optimize methods for sample collection, management, and storage under normalized conditions and to define QC standards. The general strategy of the Chr-16 HPP and the current state of the different initiatives are discussed.

Utilización de cánulas nasales de alto flujo para la ventilación no invasiva en niños / Use of high-flow nasal cannula for non-invasive ventilation in children

Objetivo: Analizar la eficacia y tolerancia de la ventilación mecánica no invasiva (VMNI) a través de unas cánulas de oxigenoterapia de alto flujo en niños con insuficiencia respiratoria moderada y/o tras retirada de ventilación mecánica. Pacientes y métodos: Estudio clínico prospectivo observacional en el que se estudió a 34 pacientes de edades comprendidas entre 9 meses y 17 años, tratados con VMNI a través de unas cánulas nasales de oxigenoterapia de alto flujo de adulto. Se analizaron las siguientes variables: edad, sexo, frecuencia respiratoria, cardiaca, saturación de oxígeno, gasometría, mejoría clínica, tolerancia, aparición de complicaciones y fracaso del tratamiento. Resultados: Trece pacientes recibieron VMNI de forma programada tras la retirada de la ventilación mecánica y 21 por insuficiencia respiratoria. El 82,3% de los pacientes mejoraron clínicamente y/o toleraron la retirada de ventilación mecánica, aunque no se observó un cambio significativo en la frecuencia respiratoria, frecuencia cardiaca, pH, pCO2 ni saturación. En 6 pacientes (17,6%) la VMNI no fue efectiva y precisó cambio a mascarilla nasal o buconasal (5 pacientes) o intubación (1 paciente). Otros dos pacientes (5,9%) precisaron cambio de interfase a mascarilla nasal o nasobucal, uno por presentar erosión nasal y otro porque aunque mejoró clínicamente, presentaba fugas excesivas. La duración del tratamiento fue de 48 h (rango 1 a 312 h). Conclusiones: La VMNI a través de cánulas nasales de alto flujo es eficaz y bien tolerada en un importante porcentaje de niños tras retirada de ventilación mecánica o con insuficiencia respiratoria moderada (AU)

Objective: To analyse the efficacy and tolerance of non-invasive mechanical ventilation (NIMV) via high-flow oxygen therapy nasal cannulae in children after withdrawal of mechanical ventilation and/or with moderate respiratory insufficiency. Patients and methods: A prospective observational clinical study including 34 children between9 months and 17 years treated with NIMV via high-flow oxygen therapy nasal cannulae. The following variables were analysed: age, sex, respiratory rate, heart rate, oxygen saturation, blood gases, clinical improvement, tolerance, onset of complications and treatment failure. Results: NIMV was used in 13 children after withdrawal of mechanical ventilation and in 21 with respiratory failure. A high percentage (82.3%) of patients improved clinically and/or allowed the mechanical ventilation to be withdrawn, but there were no significant changes in respiratory rate, heart rate, pH, pCO2 or saturation. NIMV was not effective in 6 patients (17.6%) and required change to a nasal or buconasal mask (5 patients) or intubation (1 patient). Two patients (5.9%) required change of interface to a nasal or buconasal mask, one had nasal erosion, and another, although improved clinically, showed excessive leakage. The duration of treatment was 48 hours (range 1 to 312 hours).Conclusions: Non-invasive mechanical ventilation via high-flow oxygen therapy nasal cannulae is effective and well tolerated in a high percentage of children after withdrawal of mechanical ventilation or with moderate respiratory insufficiency (AU)

[Use of high-flow nasal cannula for non-invasive ventilation in children]. / Utilización de cánulas nasales de alto flujo para la ventilación no invasiva en niños.

OBJECTIVE: To analyse the efficacy and tolerance of non-invasive mechanical ventilation (NIMV) via high-flow oxygen therapy nasal cannulae in children after withdrawal of mechanical ventilation and/or with moderate respiratory insufficiency. PATIENTS AND METHODS: A prospective observational clinical study including 34 children between 9 months and 17 years treated with NIMV via high-flow oxygen therapy nasal cannulae. The following variables were analysed: age, sex, respiratory rate, heart rate, oxygen saturation, blood gases, clinical improvement, tolerance, onset of complications and treatment failure. RESULTS: NIMV was used in 13 children after withdrawal of mechanical ventilation and in 21 with respiratory failure. A high percentage (82.3%) of patients improved clinically and/or allowed the mechanical ventilation to be withdrawn, but there were no significant changes in respiratory rate, heart rate, pH, pCO(2) or saturation. NIMV was not effective in 6 patients (17.6%) and required change to a nasal or buconasal mask (5 patients) or intubation (1 patient). Two patients (5.9%) required change of interface to a nasal or buconasal mask, one had nasal erosion, and another, although improved clinically, showed excessive leakage. The duration of treatment was 48 hours (range 1 to 312 hours). CONCLUSIONS: Non-invasive mechanical ventilation via high-flow oxygen therapy nasal cannulae is effective and well tolerated in a high percentage of children after withdrawal of mechanical ventilation or with moderate respiratory insufficiency.

[Evaluation of a paediatric critical care training program for residents in paediatrics]. / Evaluación de un programa de formación en cuidados intensivos pediátricos para residentes de pediatría.

OBJECTIVE: To evaluate a training program in paediatric critical care for residents in paediatrics. METHODS: Description of a paediatric critical care training program for residents in paediatrics. To evaluate the results of the program an initial, and final written test, an evaluation by the physician responsible for the program, a self-evaluation by the residents, and a written survey on the quality of the training program, were performed. RESULTS: From April 1998 to August 2009, 156 residents were included in the training program. All residents showed an improvement between the initial and final written test; initial score (5.6+/-1.2), final score (8.6+/-0.7) (P<0.001). Only 14.1% of the residents answered at least 70 % of the questions correctly in the initial test, compared with 96.6 % in the final test (P<0.001). The score in final test was significantly higher than the self-evaluation by the residents (6.7+/-1.2) and the evaluation by the tutor (6.9+/-0.9) (P<0.001). There were no differences between the practical self-evaluation by the residents (6.2+/-1.0) and the practical evaluation by the tutor (6.7+/-0.9). Residents considered the training program as adequate: theoretical education (8.5+/-0.8), resident handbook (9+/-0.9), practical training (8.3+/-1.0), investigation (7.6+/-2.0) and human relationship (9.2+/-0.9). CONCLUSIONS: This training program is an useful educational method for training paediatric intensive care residents. The evaluation of the training program is essential to improve the education in paediatric residents.

Evaluación de un programa de formación en cuidados intensivos pediátricos para residentes de pediatría / Evaluation of a paediatric critical care training program for residents in paediatrics

Objetivo: Evaluar los resultados de un programa de formación en cuidados intensivos pediátricos para residentes de Pediatría. Métodos: Se diseñó un programa de formación en cuidados intensivos pediátricos para médicos residentes de Pediatría y se evaluaron los resultados con una prueba teórica escrita inicial y final, una evaluación por el médico responsable, una autoevaluación de los residentes y una encuesta escrita sobre la calidad del programa. Resultados: Desde abril del 1998 hasta agosto de 2009, se incluyeron a 156 residentes en el programa de formación. Los residentes mostraron mejoría entre la evaluación teórica inicial (5,6±1,2) y la final (8,6±0,7) (p<0,001). Un 14,1% contestó correctamente al menos el 70 % de las preguntas de la evaluación inicial y un 96,6 % de la final (p<0,001). La puntuación teórica final fue significativamente más alta que la autoevaluación de los residentes (6,7±1,2) y la evaluación de los tutores (6,9±0,9) (p<0,001). No hubo diferencias entre la autoevaluación práctica de los residentes (5,8±1,3) y la evaluación práctica del tutor (6,7±0,9). Los residentes consideraron adecuado el programa formativo: formación teórica (8,5±0,8), manual de residentes (9±0,9), educación práctica (8,3±1,0), investigación (7,6±2,0) y trato humano (9,2±0,9). Conclusiones: El programa descrito es un método educativo útil para la formación teórica y práctica de los residentes de Pediatría en cuidados intensivos. La evaluación del programa de entrenamiento es esencial para mejorar la formación de los residentes de Pediatría (AU)

Objective: To evaluate a training program in paediatric critical care for residents in paediatrics. Methods: Description of a paediatric critical care training program for residents in paediatrics. To evaluate the results of the program an initial, and final written test, an evaluation by the physician responsible for the program, a self-evaluation by the residents, and a written survey on the quality of the training program, were performed. Results: From April 1998 to August 2009, 156 residents were included in the training program. All residents showed an improvement between the initial and final written test; initial score (5.6±1.2), final score (8.6±0.7) (P<0.001). Only 14.1% of the residents answered at least 70 % of the questions correctly in the initial test, compared with 96.6 % in the final test (P<0.001). The score in final test was significantly higher than the self-evaluation by the residents (6.7±1.2) and the evaluation by the tutor (6.9±0.9) (P<0.001). There were no differences between the practical self-evaluation by the residents (6.2±1.0) and the practical evaluation by the tutor (6.7±0.9). Residents considered the training program as adequate: theoretical education (8.5±0.8), resident handbook (9±0.9), practical training (8.3±1.0), investigation (7.6±2.0) and human relationship (9.2±0.9). Conclusions: This training program is an useful educational method for training paediatric intensive care residents. The evaluation of the training program is essential to improve the education in paediatric residents (AU)

CPAP decreases plasma levels of soluble tumour necrosis factor-alpha receptor 1 in obstructive sleep apnoea.

There is increasing evidence that inflammation plays an important role in the development of cardiovascular complications in patients with obstructive sleep apnoea (OSA). No previous works have studied levels of soluble tumour necrosis factor-alpha receptor (sTNFR)-1 in patients with OSA. The aims of the present study were to examine serum levels of sTNFR-1 and the effect of nasal continuous positive airway pressure (CPAP) in patients with OSA. A prospective, randomised, placebo-controlled crossover study was performed. In total, 30 consecutive newly diagnosed OSA patients (apnoea/hypopnoea index 43.8+/-27.0 events x h(-1)) and 15 healthy obese patients were selected. Urinary levels of norepinephrine and epinephrine, as well as plasma sTNFR-1, tumour necrosis factor (TNF)-alpha, interleukin (IL)-6 and leukotriene (LT)B(4) levels were obtained at baseline and after 3 months of CPAP or sham CPAP. Nocturnal urinary levels of norepinephrine, epinephrine and sTNFR-1 (1,053+/-269 versus 820+/-166 pg x mL(-1)) were significantly higher in OSA patients. There were no significant differences in plasma levels of IL-6, LTB(4), or TNF-alpha between the two study groups. There were no significant differences in blood pressure, urinary catecholamine levels, or plasma IL-6, LTB(4) and TNF-alpha levels after both treatment modalities. However, after 3 months of effective CPAP usage, sTNFR-1 levels were significantly reduced (1,053+/-269 versus 899+/-254 pg x mL(-1)). Obstructive sleep apnoea patients have higher levels of soluble tumour necrosis factor-alpha receptor 1 than individuals without OSA; soluble tumour necrosis factor-alpha receptor 1 levels are lowered by continuous positive airway pressure therapy. These findings further corroborate a potential role of inflammation in the natural history of obstructive sleep apnoea.

[The effect of helium on ventilator parameters: in vitro study with a Servoi ventilator]. / Efecto del helio sobre los parámetros de los respiradores en ventilación mecánica: estudio in vitro con el respirador Servoi.

OBJECTIVE: To analyze the changes in respiratory parameters in a Servoi ventilator with heliox. MATERIAL AND METHODS: In vitro study with a Servoi (Maquet) ventilator in volume controlled (VC), pressure controlled (PC) and volume control regulated by pressure (VCPR) modes connected to an artificial lung. A heliox tank with a fixed concentration of helium 70 % and oxygen 30 % was connected to the air inlet of the ventilator. The ventilator was set in VC mode with tidal volumes of 30, 50, 100, 250 and 500 ml; in PC mode with pressure of 20 and 30 cmH(2)O and in VCPR mode with tidal volume of 150 ml. In each case FiO(2) of 21, 30, 40, 50, 60, 70, 80, 90 and 100 % was used. The FiO(2), inspired and expired tidal volume and inspiratory pressure measured by the ventilator and a pitot spirometer (Datex_S5) were compared. RESULTS: In VC and VCPR modes the increase in helium produced a progressive decrease in the pressure needed to administrate the set volume. Heliox also produced a decrease in the tidal volume measured by the spirometer and the tidal expired volume measured by the respirator. In PC mode, heliox produced a progressive increase in the inspired tidal volume, increasing the differences between inspired and expired tidal volumes. CONCLUSIONS: Heliox used with Servoi ventilator produces a decrease in inspiratory pressures in VC and VCPR modes, and an increase in inspiratory tidal volume in PC mode. In all modes heliox reduced the expired tidal volume measured by the ventilator and the spirometer. These changes should be borne in mind if heliox is used with this ventilator.

Efecto del helio sobre los parámetros de los respiradores en ventilación mecánica: estudio in vitro con el respirador Servoi / The effect of helium on ventilator parameters: in vitro study with a Servoi ventilator

Objetivo: Analizar las modificaciones de los parámetros en el respirador Servoi con distintas concentraciones de héliox. Material y métodos: Estudio experimental en el que se utilizó un respirador Servoi (Maquet) en modalidades de volumen control (VC), presión control (PC) y volumen controlado regulado por presión (VCRP) conectado a un pulmón de artificial. El héliox se administró mediante una bombona con el 70 % de helio y el 30 % de oxígeno conectada a la entrada de aire del respirador. Se programó el respirador en VC con volúmenes corrientes de 30, 50, 100, 250 y 500 ml, en PC con presión de 20 y 30 cmH2O, y en VCRP con volumen corriente de 150 ml. En cada modalidad se programó una FiO2 de 21, 30, 40, 50, 60, 70, 80, 90 y 100 % y se comparó el volumen corriente inspirado, el espirado y la presión inspiratoria pico medidas por el respirador y por un espirómetro colocado entre la tubuladura y el pulmón de prueba y conectado a un monitor Datex_S5. Resultados: En modalidad de VC y VCRP el aumento de la concentración de helio produjo una disminución progresiva del pico de presión necesario para administrar el volumen programado y una disminución en el volumen corriente medido por el espirómetro y el volumen espirado medido por el respirador. En modalidad de PC el héliox produjo un aumento progresivo del volumen corriente inspirado con incremento en las diferencias entre el volumen corriente inspirado y el espirado. Conclusiones: La administración de héliox en el respirador Servoi produce una disminución de las presiones inspiratorias en las modalidades de VC y VCRP y un aumento del volumen corriente inspirado en la modalidad de PC. En todas las modalidades produce una falsa disminución en el volumen corriente espirado medido por el respirador y el espirómetro. Es necesario tener en cuenta estas alteraciones si se utiliza héliox con este respirador (AU)

Objective: To analyze the changes in respiratory parameters in a Servoi ventilator with heliox. Material and methods: In vitro study with a Servoi (Maquet) ventilator in volume controlled (VC), pressure controlled (PC) and volume control regulated by pressure (VCPR) modes connected to an artificial lung. A heliox tank with a fixed concentration of helium 70 % and oxygen 30 % was connected to the air inlet of the ventilator. The ventilator was set in VC mode with tidal volumes of 30, 50, 100, 250 and 500 ml; in PC mode with pressure of 20 and 30 cmH2O and in VCPR mode with tidal volume of 150 ml. In each case FiO2 of 21, 30, 40, 50, 60, 70, 80, 90 and 100 % was used. The FiO2, inspired and expired tidal volume and inspiratory pressure measured by the ventilator and a pitot spirometer (Datex_S5) were compared. Results: In VC and VCPR modes the increase in helium produced a progressive decrease in the pressure needed to administrate the set volume. Heliox also produced a decrease in the tidal volume measured by the spirometer and the tidal expired volume measured by the respirator. In PC mode, heliox produced a progressive increase in the inspired tidal volume, increasing the differences between inspired and expired tidal volumes. Conclusions: Heliox used with Servoi ventilator produces a decrease in inspiratory pressures in VC and VCPR modes, and an increase in inspiratory tidal volume in PC mode. In all modes heliox reduced the expired tidal volume measured by the ventilator and the spirometer. These changes should be borne in mind if heliox is used with this ventilator (AU)

[Experience with high-flow nasal cannula oxygen therapy in children]. / Experiencia con la oxigenoterapia de alto flujo en cánulas nasales en niños.

OBJECTIVE: To analyze the efficacy of a high-flow oxygen therapy system in children with moderate respiratory failure and/or high oxygen requirements. PATIENTS AND METHODS: We performed a prospective, observational clinical study of patients treated with a high-flow oxygen therapy system via nasal cannulae. The following variables were analyzed: clinical severity score, respiratory rate, heart rate, clinical improvement, oxygen saturation, blood gases, complications, and the need for ventilation after starting the treatment. RESULTS: Eighteen treatments were studied in 16 patients (two girls and 14 boys) aged between 2 and 156 months. With the high-flow oxygen therapy system, respiratory rate slightly decreased from 34.5 bpm to 32.2 bpm (p<0.04) and O2 saturation increased from 90.2% to 93.5% (p<0.02). Fourteen patients showed a clinical improvement and/or tolerated the change from the previous respiratory assistance. The duration of treatment was 3 days (range: 6 hours to 25 days). Mild complications (initial irritability and excessive humidity) were observed in two patients, but treatment interruption was not required. No secondary respiratory tract infections were observed. The system was withdrawn in four patients, due to lack of improvement in two patients, deterioration after initial improvement in one patient, and failure of the system's temperature regulation in one patient. CONCLUSIONS: The high-flow oxygen therapy system is effective in a large percentage of children with high oxygen requirements and/or moderate respiratory failure.

Experiencia con la oxigenoterapia de alto flujo en cánulas nasales en niños / Experience with high-flow nasal cannula oxygen therapy in children

Objetivo. Analizar la eficacia de un sistema de oxigenoterapia de alto flujo en niños con insuficiencia respiratoria moderada y/o necesidades elevadas de oxígeno. Pacientes y métodos.Estudio clínico prospectivo observacional en el que se incluyeron los pacientes tratados con un sistema de oxigenoterapia de alto flujo en cánulas nasales. Se analizaron las siguientes variables: puntuación de gravedad clínica, frecuencia respiratoria, cardíaca, mejoría clínica, saturación de oxígeno, gasometría, aparición de complicaciones y necesidad de ventilación no invasiva tras el inicio del tratamiento. Resultados. Se estudiaron 18 tratamientos en 16 pacientes, 2 niñas y 14 niños, de edades comprendidas entre 2 meses y 13 años. Con el sistema de alto flujo se observó una ligera disminución de la frecuencia respiratoria de 34,5 a 32,2 resp./min; p < 0,04, y un aumento de la saturación de oxígeno (SatO2) del 90,2 al 93,5 %; p < 0,02. Un total de 14 pacientes mejoraron clínicamente y/o permitieron el cambio desde la asistencia respiratoria previa. La duración del tratamiento fue de 3 días (rango 6 h a 25 días). En 2 pacientes se observaron complicaciones leves que no obligaron a suspender el tratamiento (irritabilidad inicial y excesiva humedad). No se observaron infecciones respiratorias secundarias. En cuatro pacientes el sistema fue retirado: en dos por falta de mejoría, en otro por empeoramiento tras mejoría inicial, y en el cuarto por fallo en la regulación de temperatura del aparato. Conclusiones. El sistema de oxigenoterapia de alto flujo es eficaz en un elevado porcentaje de niños con necesidades elevadas de oxígeno y/o insuficiencia respiratoria moderada

Objective. To analyze the efficacy of a high-flow oxygen therapy system in children with moderate respiratory failure and/or high oxygen requirements. Patients and methods. We performed a prospective, observational clinical study of patients treated with a high-flow oxygen therapy system via nasal cannulae. The following variables were analyzed: clinical severity score, respiratory rate, heart rate, clinical improvement, oxygen saturation, blood gases, complications, and the need for ventilation after starting the treatment. Results. Eighteen treatments were studied in 16 patients (two girls and 14 boys) aged between 2 and 156 months. With the high-flow oxygen therapy system, respiratory rate slightly decreased from 34.5 bpm to 32.2 bpm (p < 0.04) and O2 saturation increased from 90.2 % to 93.5 % (p < 0.02). Fourteen patients showed a clinical improvement and/or tolerated the change from the previous respiratory assistance. The duration of treatment was 3 days (range: 6 hours to 25 days). Mild complications (initial irritability and excessive humidity) were observed in two patients, but treatment interruption was not required. No secondary respiratory tract infections were observed. The system was withdrawn in four patients, due to lack of improvement in two patients, deterioration after initial improvement in one patient, and failure of the system's temperature regulation in one patient. Conclusions. The high-flow oxygen therapy system is effective in a large percentage of children with high oxygen requirements and/or moderate respiratory failure