Failure of Non-Invasive Respiratory Support in Patients with SARS-CoV-2.

INTRODUCTION: The objective of this study is to assess the failure of therapies with HFNO (high-flow nasal oxygen), CPAP, Bilevel, or combined therapy in patients with hypoxemic acute respiratory failure due to SARS-CoV-2 during their hospitalization. METHODS: This was a retrospective and observational study of SARS-CoV-2-positive patients who required non-invasive respiratory support (NIRS) at the Reina Sofía General University Hospital of Murcia between March 2020 and May 2021. RESULTS: Of 7355 patients, 197 (11.8%) were included; 95 of them failed this therapy (48.3%). We found that during hospitalization in the ward, the combined therapy of HFNO and CPAP had an overall lower failure rate and the highest treatment with Bilevel (p = 0.005). In the comparison of failure in therapy without two levels of airway pressure, HFNO, CPAP, and combined therapy of HFNO with CPAP, (35.6% of patients) presented with 24.2% failure, compared to those who had two levels of pressure with Bilevel and combined therapy of HFNO with Bilevel (64.4% of patients), with 75.8% associated failure (OR: 0, 374; CI 95%: 0.203-0.688. p = 0.001). CONCLUSIONS: The use of NIRS during conventional hospitalization is safe and effective in patients with respiratory failure secondary to SARS-CoV-2 infection. The therapeutic strategy of Bilevel increases the probability of failure, with the combined therapy strategy of CPAP and HFNO being the most promising option.

Emergency department direct discharge compared to short-stay unit admission for selected patients with acute heart failure: analysis of short-term outcomes.

Short stay unit (SSU) is an alternative to conventional hospitalization in patients with acute heart failure (AHF), but the prognosis is not known compared to direct discharge from the emergency department (ED). To determine whether direct discharge from the ED of patients diagnosed with AHF is associated with early adverse outcomes versus hospitalization in SSU. Endpoints, defined as 30-day all-cause mortality or post-discharge adverse events, were evaluated in patients diagnosed with AHF in 17 Spanish EDs with an SSU, and compared by ED discharge vs. SSU hospitalization. Endpoint risk was adjusted for baseline and AHF episode characteristics and in patients matched by propensity score (PS) for SSU hospitalization. Overall, 2358 patients were discharged home and 2003 were hospitalized in SSUs. Discharged patients were younger, more frequently men, with fewer comorbidities, had better baseline status, less infection, rapid atrial fibrillation and hypertensive emergency as the AHF trigger, and had a lower severity of AHF episode. While their 30-day mortality rate was lower than in patients hospitalized in SSU (4.4% vs. 8.1%, p < 0.001), 30-day post-discharge adverse events were similar (27.2% vs. 28.4%, p = 0.599). After adjustment, there were no differences in the 30-day risk of mortality of discharged patients (adjusted HR 0.846, 95% CI 0.637-1.107) or adverse events (1.035, 0.914-1.173). In 337 pairs of PS-matched patients, there were no differences in mortality or risk of adverse event between patients directly discharged or admitted to an SSU (0.753, 0.409-1.397; and 0.858, 0.645-1.142; respectively). Direct ED discharge of patients diagnosed with AHF provides similar outcomes compared to patients with similar characteristics and hospitalized in a SSU.

Short-term outcomes by chronic betablocker treatment in patients presenting to emergency departments with acute heart failure: BB-EAHFE.

AIMS: To evaluate the association between chronic treatment with betablockers (BB) and the severity of decompensation and short-term outcomes of patients with acute heart failure (AHF). METHODS AND RESULTS: We consecutively included all patients presenting with AHF to 45 Spanish emergency departments (ED) during six different time-periods between 2007 and 2018. Patients were stratified according to whether they were on chronic treatment with BB at the time of ED consultation. Those receiving BB were compared (adjusted odds ratio-OR-with 95% confidence interval-CI-) with those not receiving BB group in terms of in-hospital and 7-day all-cause mortality, need for hospitalization, and prolonged length of stay (≥7 days). Among the 17 923 recruited patients (median age: 80 years; 56% women), 7795 (43%) were on chronic treatment with BB. Based on the MEESSI-AHF risk score, those on BB were at lower risk. In-hospital mortality was observed in 1310 patients (7.4%), 7-day mortality in 765 (4.3%), need for hospitalization in 13 428 (75.0%), and prolonged length of stay (43.3%). After adjustment for confounding, those on chronic BB were at lower risk for in-hospital all-cause mortality (OR = 0.85, 95% CI = 0.79-0.92, P < 0.001); 7-day all-cause mortality (OR = 0.77, 95% CI = 0.70-0.85, P < 0.001); need for hospitalization (OR = 0.89, 95% CI = 0.85-0.94, P < 0.001); prolonged length of stay (OR = 0.90, 95% CI = 0.86-0.94, P < 0.001). A propensity matching approach yielded consistent findings. CONCLUSION: In patients presenting to ED with AHF, those on BB had better short-term outcomes than those not receiving BB.

Sociodemographic characteristics, comorbidity, and baseline functional status of older patients treated in emergency departments during the COVID-19 pandemic and associations with mortality: an analysis based on the EDENCOVID cohort. / Sociodemografía, comorbilidad y situación funcional basal de los pacientes mayores atendidos en urgencias durante la pandemia de COVID y su relación con la mortalidad: análisis a partir de la cohorte EDEN-Covid.

OBJECTIVES: To describe the sociodemographic characteristics, comorbidity, and baseline functional status of patients aged 65 or older who came to hospital emergency departments (EDs) during the first wave of the COVID-19 pandemic, and to compare them with the findings for an earlier period to analyze factors of the index episode that were related to mortality. MATERIAL AND METHODS: We studied data from the EDEN-COVID cohort (Emergency Department and Elder Needs During COVID-19) of patients aged 65 years or older treated in 40 Spanish EDs on 7 consecutive days. Nine sociodemographic variables, 18 comorbidities, and 7 function variables were registered and compared with the findings for the EDEN cohort of patients included with the same criteria and treated a year earlier in the same EDs. In-hospital mortality was calculated in the 2 cohorts and a multivariable logistic regression model was used to explore associated factors. RESULTS: The EDEN-COVID cohort included 6806 patients with a median age of 78 years; 49% were women. The pandemic cohort had a higher proportion of men, patients covered by the national health care system, patients brought from residential facilities, and patients who arrived in an ambulance equipped for advanced life support. Pandemic-cohort patients more often had diabetes mellitus, chronic kidney disease, and dementia; they less often had connective tissue and thromboembolic diseases. The Barthel and Charlson indices were worse in this period, and cognitive decline was more common. Fewer patients had a history of depression or falls. Eight hundred ninety these patients (13.1%) died, 122 of them in the ED (1.8%); these percentages were lower in the earlier EDEN cohort, at 3.1% and 0.5%, respectively. Independent sociodemographic factors associated with higher mortality were transport by ambulance, older age, male sex, and living in a residential facility. Mortalityassociated comorbidities were neoplasms, chronic kidney disease, and heart failure. The only function variable associated with mortality was the inability to walk independently. A history of falls in the past 6 months was a protective factor. CONCLUSION: The sociodemographic characteristics, comorbidity, and functional status of patients aged 65 years or older who were treated in hospital EDs during the pandemic differed in many ways from those usually seen in this older-age population. Mortality was higher than in the prepandemic period. Certain sociodemographic, comorbidity, and function variables were associated with in-hospital mortality.

OBJETIVO: Investigar sociodemografía, comorbilidad y situación funcional de los pacientes de 65 o más años de edad que consultaron a los servicios de urgencias hospitalarios (SUH) durante la primera oleada epidémica de COVID, compararlas con un periodo previo y ver su relación. METODO: Se utilizaron los datos obtenidos de la cohorte EDEN-Covid (Emergency Department and Elder Needs during COVID) en la que participaron 40 SUH españoles que incluyeron todos los pacientes de $ 65 años atendidos durante 7 días consecutivos. Se analizaron 9 características sociodemográficas, 18 comorbilidades y 7 variables de funcionalidad, que se compararon con las de la cohorte EDEN (Emergency Department and Elder Needs), que contiene pacientes con el mismo criterio de inclusión etario reclutados por los mismos SUH un año antes. Se recogió la mortalidad intrahospitalaria y se investigaron los factores asociados mediante regresión logística multivariable. RESULTADOS: La cohorte EDEN-Covid incluyó 6.806 pacientes (mediana edad: 78 años; 49% mujeres). Hubo más varones, con cobertura sanitaria pública, procedentes de residencia y que llegaron con ambulancia medicalizada que durante el periodo prepandemia. Presentaron más frecuentemente diabetes mellitus, enfermedad renal crónica, enfermedad cerebrovascular y demencia y menos conectivopatías y enfermedad tromboembólica, peores índices de Barthel y Charlson, más deterioro cognitivo y menos antecedentes de depresión o caídas previas. Fallecieron durante el episodio 890 pacientes (13,1%), 122 de ellos en urgencias (1,8%), porcentajes superiores al periodo prepandemia (3,1% y 0,5%, respectivamente). Se asociaron de forma independiente a mayor mortalidad durante el periodo COVID la llegada en ambulancia, mayor edad, ser varón y vivir en residencia como variables sociodemográficas, y neoplasia, enfermedad renal crónica e insuficiencia cardiaca como comorbilidades. La única variable funcional asociada a mortalidad fue no deambular respecto a ser autónomo, y la existencia de caídas los 6 meses previos resultó un factor protector. CONCLUSIONES: La sociodemografía, comorbilidad y funcionalidad de los pacientes de 65 o más años que consultaron en los SUH españoles durante la primera ola pandémica difirieron en muchos aspectos de lo habitualmente observado en esta población. La mortalidad fue mayor a la del periodo prepandémico. Algunos aspectos sociodemográficos, de comorbilidad y funcionales se relacionaron con la mortalidad intrahospitalaria.

Incidence, clinical characteristics, risk factors and outcomes of meningoencephalitis in patients with COVID-19.

We investigated the incidence, clinical characteristics, risk factors, and outcome of meningoencephalitis (ME) in patients with COVID-19 attending emergency departments (ED), before hospitalization. We retrospectively reviewed all COVID patients diagnosed with ME in 61 Spanish EDs (20% of Spanish EDs, COVID-ME) during the COVID pandemic. We formed two control groups: non-COVID patients with ME (non-COVID-ME) and COVID patients without ME (COVID-non-ME). Unadjusted comparisons between cases and controls were performed regarding 57 baseline and clinical characteristics and 4 outcomes. Cerebrospinal fluid (CSF) biochemical and serologic findings of COVID-ME and non-COVID-ME were also investigated. We identified 29 ME in 71,904 patients with COVID-19 attending EDs (0.40‰, 95%CI=0.27-0.58). This incidence was higher than that observed in non-COVID patients (150/1,358,134, 0.11‰, 95%CI=0.09-0.13; OR=3.65, 95%CI=2.45-5.44). With respect to non-COVID-ME, COVID-ME more frequently had dyspnea and chest X-ray abnormalities, and neck stiffness was less frequent (OR=0.3, 95%CI=0.1-0.9). In 69.0% of COVID-ME, CSF cells were predominantly lymphocytes, and SARS-CoV-2 antigen was detected by RT-PCR in 1 patient. The clinical characteristics associated with a higher risk of presenting ME in COVID patients were vomiting (OR=3.7, 95%CI=1.4-10.2), headache (OR=24.7, 95%CI=10.2-60.1), and altered mental status (OR=12.9, 95%CI=6.6-25.0). COVID-ME patients had a higher in-hospital mortality than non-COVID-ME patients (OR=2.26; 95%CI=1.04-4.48), and a higher need for hospitalization (OR=8.02; 95%CI=1.19-66.7) and intensive care admission (OR=5.89; 95%CI=3.12-11.14) than COVID-non-ME patients. ME is an unusual form of COVID presentation (<0.5‰ cases), but is more than 4-fold more frequent than in non-COVID patients attending the ED. As the majority of these MEs had lymphocytic predominance and in one patient SARS-CoV-2 antigen was detected in CSF, SARS-CoV-2 could be the cause of most of the cases observed. COVID-ME patients had a higher unadjusted in-hospital mortality than non-COVID-ME patients.

Effect of risk of malnutrition on 30-day mortality among older patients with acute heart failure in Emergency Departments.

BACKGROUND: Little is known about the prevalence and impact of risk of malnutrition on short-term mortality among seniors presenting with acute heart failure (AHF) in emergency setting. The objective was to determine the impact of risk of malnutrition on 30-day mortality risk among older patients who attended in Emergency Departments (EDs) for AHF. MATERIAL AND METHODS: We performed a secondary analysis of the OAK-3 Registry including all consecutive patients ≥65 years attending in 16 Spanish EDs for AHF. Risk of malnutrition was defined by the Mini Nutritional Assessment Short Form (MNA-SF) < 12 points. Unadjusted and adjusted logistic regression models were used to assess the association between risk of malnutrition and 30-day mortality. RESULTS: We included 749 patients (mean age: 85 (SD 6); 55.8% females). Risk of malnutrition was observed in 594 (79.3%) patients. The rate of 30-day mortality was 8.8%. After adjusting for MEESSI-AHF risk score clinical categories (model 1) and after adding all variables showing a significantly different distribution among groups (model 2), the risk of malnutrition was an independent factor associated with 30-day mortality (adjusted OR by model 1 = 3.4; 95%CI 1.2-9.7; p = .020 and adjusted OR by model 2 = 3.1; 95%CI 1.1-9.0; p = .033) compared to normal nutritional status. CONCLUSIONS: The risk of malnutrition assessed by the MNA-SF is associated with 30-day mortality in older patients with AHF who were attended in EDs. Routine screening of risk of malnutrition may help emergency physicians in decision-making and establishing a care plan.

Impacto de las variables geriátricas en la mortalidad a 30 días de los ancianos atendidos por insuficiencia cardiaca aguda / Impact of geriatric assessment variables on 30-day mortality among older patients with acute heart failure

OBJETIVOS: Estudiar el impacto de las variables geriátricas en la mortalidad a 30 días entre los ancianos con insuficiencia cardiaca aguda (ICA). MÉTODO: Análisis retrospectivo del registro Older Acute heart failure Key data (OAK) que incluye prospectivamente a pacientes consecutivos 65 años con ICA en 3 servicios de urgencias españoles durante 4 meses (noviembre-diciembre 2011 y enero-febrero 2014). Se realizó una valoración geriátrica adaptada a urgencias durante los días laborales de 8 am a 10 pm. Se recogieron variables demográficas, clínicas, analíticas y geriátricas (comorbilidad, polifarmacia, fragilidad, situación basal funcional, cognitiva y social, despistaje de síndrome confusional, deterioro cognitivo y depresión, y situación nutricional). La variable de resultado fue la mortalidad por cualquier causa a los 30 días. RESULTADOS: Se incluyeron 565 pacientes con edad media 83 años (DE 7,1), 346 mujeres (61,6%). Sesenta y cinco sujetos (11,5%) fallecieron a los 30 días. La presencia de síndrome confusional agudo (OR ajustada = 2,2; IC95% 1,0-4,8; p = 0,04), de enfermedad aguda (OR ajustada = 1,8; IC95% 0,9-3,4; p = 0,05) o pérdida de apetito (OR ajustada = 1,8; IC95% 1-3,4; p = 0,04) en los últimos 3 meses, y de fragilidad (OR ajustada = 2,0; IC95% 1,0-4,1; p = 0,05) o dependencia funcional grave (OR ajustada = 4,4; IC95% 1,9-11,4; p = 0,01) fueron factores independientes asociados con mortalidad a los 30 días. CONCLUSIONES: Existen ciertas variables geriátricas que debieran contemplarse en la estratificación de riesgo a corto plazo de los pacientes ancianos con ICA

OBJECTIVE: To study the impact of geriatric assessment variables on 30-day mortality among older patients with acute heart failure (AHF). METHODS: Retrospective analysis of cases in the OAK Registry (Older Acute Heart Failure Key Data), a prospectively compiled database of consecutive patients aged 65 years or older treated for AHF in 3 Spanish emergency departments over a 4-month period (November-December 2011 and January-February 2014). The patients underwent a geriatric assessment adapted for emergency department use on weekdays between 8 AM and 10 PM. Demographic, clinical, laboratory, and geriatric assessment variables were recorded. The geriatric variables were concurrent diseases; polypharmacy; frailty; functional, social, and cognitive status at baseline; results of screening for confusional state, cognitive impairment, and depression; and nutritional status. The primary outcome was all-cause mortality at 30 days. RESULTS: We included 565 patients with a mean (SD) age of 83 (7.1) years; 346 (61.6%) were women. Sixty-five (11.5%) died within 30 days. Independent factors associated with 30-day mortality were acute confusional state (adjusted odds ratio [aOR], 2.2; 95% CI, 1.0-4.8; P=.04), acute illness (aOR, 1.8; 95% CI, 0.9-3.4; P=.05), loss of appetite in the past 3 months (aOR, 1.8; 95% CI, 1.0-3.4; P=.04), frailty (aOR, 2.0, 95% CI, 1.0-4.1; P=.05), and severe disability (aOR, 4.4; 95% CI, 1.9-11.4; P=.01). CONCLUSIONS: Certain geriatric variables should be considered when assessing short-term risk in older patients with AHF

Impact of geriatric assessment variables on 30-day mortality among older patients with acute heart failure. / Impacto de las variables geriátricas en la mortalidad a 30 días de los ancianos atendidos por insuficiencia cardiaca aguda?

OBJETIVE: To study the impact of geriatric assessment variables on 30-day mortality among older patients with acute heart failure (AHF). METHODS: Retrospective analysis of cases in the OAK Registry (Older Acute Heart Failure Key Data), a prospectively compiled database of consecutive patients aged 65 years or older treated for AHF in 3 Spanish emergency departments over a 4-month period (November-December 2011 and January-February 2014). The patients underwent a geriatric assessment adapted for emergency department use on weekdays between 8 AM and 10 PM. Demographic, clinical, laboratory, and geriatric assessment variables were recorded. The geriatric variables were concurrent diseases; polypharmacy; frailty; functional, social, and cognitive status at baseline; results of screening for confusional state, cognitive impairment, and depression; and nutritional status. The primary outcome was all-cause mortality at 30 days. RESULTS: We included 565 patients with a mean (SD) age of 83 (7.1) years; 346 (61.6%) were women. Sixty-five (11.5%) died within 30 days. Independent factors associated with 30-day mortality were acute confusional state (adjusted odds ratio [aOR], 2.2; 95% CI, 1.0­4.8; P=.04), acute illness (aOR, 1.8; 95% CI, 0.9­3.4; P=.05), loss of appetite in the past 3 months (aOR, 1.8; 95% CI, 1.0­3.4; P=.04), frailty (aOR, 2.0, 95% CI, 1.0­4.1; P=.05), and severe disability (aOR, 4.4; 95% CI, 1.9­11.4; P=.01). CONCLUSIONS: Certain geriatric variables should be considered when assessing short-term risk in older patients with AHF.

OBJETIVOS: Estudiar el impacto de las variables geriátricas en la mortalidad a 30 días entre los ancianos con insuficiencia cardiaca aguda (ICA). MÉTODO: Análisis retrospectivo del registro Older Acute heart failure Key data (OAK) que incluye prospectivamente a pacientes consecutivos 65 años con ICA en 3 servicios de urgencias españoles durante 4 meses (noviembre-diciembre 2011 y enero-febrero 2014). Se realizó una valoración geriátrica adaptada a urgencias durante los días laborales de 8 am a 10 pm. Se recogieron variables demográficas, clínicas, analíticas y geriátricas (comorbilidad, polifarmacia, fragilidad, situación basal funcional, cognitiva y social, despistaje de síndrome confusional, deterioro cognitivo y depresión, y situación nutricional). La variable de resultado fue la mortalidad por cualquier causa a los 30 días. RESULTADOS: Se incluyeron 565 pacientes con edad media 83 años (DE 7,1), 346 mujeres (61,6%). Sesenta y cinco sujetos (11,5%) fallecieron a los 30 días. La presencia de síndrome confusional agudo (OR ajustada = 2,2; IC95% 1,0-4,8; p = 0,04), de enfermedad aguda (OR ajustada = 1,8; IC95% 0,9-3,4; p = 0,05) o pérdida de apetito (OR ajustada = 1,8; IC95% 1-3,4; p = 0,04) en los últimos 3 meses, y de fragilidad (OR ajustada = 2,0; IC95% 1,0-4,1; p = 0,05) o dependencia funcional grave (OR ajustada = 4,4; IC95% 1,9-11,4; p = 0,01) fueron factores independientes asociados con mortalidad a los 30 días. CONCLUSIONES: Existen ciertas variables geriátricas que debieran contemplarse en la estratificación de riesgo a corto plazo de los pacientes ancianos con ICA.

Relación entre la movilidad diafragmática medida por ecografía y la presión parcial arterial de CO2 en pacientes con insuficiencia respiratoria aguda hipercápnica tras el inicio de la ventilación mecánica no invasiva en urgencias / Relation between ultrasound-measured diaphragm movement and partial pressure of carbon dioxide in blood from patients with acute hypercapnic respiratory failure after the start of noninvasive ventilation in an emergency department

Objetivo: Correlacionar la variación de la movilidad diafragmática (MD), medida a través de ecografía, con el cambio en la presión parcial arterial de CO2 de (pCO2) tras el inicio de la ventilación mecánica no invasiva (VMNI). Método: Estudio descriptivo de una serie de casos prospectivo que incluyó por oportunidad a los pacientes de 18 o más años con insuficiencia respiratoria hipercápnica en los que se inició la VMNI en urgencias. Se recogieron variables clínicas, gasométricas y mediciones ecográficas de la MD directa (MDD) y MD portal (MDP). Resultados: Se incluyeron 21 pacientes, con una edad media de 83 (DE 13) años, de ellos 11 mujeres (52,4%). Los valores de MDD y pCO2 fueron: 1) basal: MDD 13,9 (DE 7,7) mm y pCO2 71,7 (DE: 11,4) mmHg; 2) 15 minutos: MDD 17,1 (DE 9,1) mm; 3) 1 hora: MDD 22,4 (DE 10,4) y pCO2 63,4 (DE: 16,0) mmHg; 4) 3 horas: MDD 26,6 (DE: 19,5) mm y pCO2 61,8 (DE :13,0) mmHg. Hubo correlación estadísticamente significativa entre la diferencia a los 15 minutos y basal de MDD y el descenso a la hora de pCO2 (r = -0,489; p = 0,035). Conclusión: El aumento de la MDD a los 15 minutos del inicio de la VMNI se relaciona con una disminución de la pCO2 a la hora en los pacientes con insuficiencia respiratoria hipercápnica (AU)

Objective: To evaluate the correlation between variations in ultrasound-measured diaphragm movement and changes in the arterial partial pressure of carbon dioxide (PCO2) after the start of noninvasive ventilation (NIV). Methods: Descriptive study of a prospective case series comprised of nonconsecutive patients aged 18 years or older with hypercapnic respiratory failure who were placed on NIV in an emergency department. We recorded clinical data, blood gas measurements, and ultrasound measurements of diaphragm movement. Results: Twenty-one patients with a mean (SD) age of 83 (13) years were studied; 11 (52.4%) were women. The mean (SD) range of diaphragm movement and PCO2 values at 4 moments were as follows: 1) at baseline: diaphragm movement, 13.90 (7.7) mm and PCO2, 71.75 (11.4) mm Hg; 2) after 15 minutes on NIV: diaphragm movement, 17.10 (9.1) mm; 3) at 1 hour: diaphragm movement, 22.40 (10.4) mm and PCO2, 63.45 (16.0) mm Hg; and 4) at 3 hours: diaphragm movement, 26.60 (19.5) mm and PCO2, 61.85 (13.0) mm Hg. We detected a statistically significant correlation between the difference in range of diaphragm movement at baseline and at 15 minutes and the decrease in PCO2 after 1 hour of NIV (r=-0.489, P=.035). Conclusion: In patients with hypercapnic respiratory failure, the increase in range of diaphragm movement 15 minutes after starting NIV is associated with a decrease in PCO2 after 1 hour (AU)

[Relation between ultrasound-measured diaphragm movement and partial pressure of carbon dioxide in blood from patients with acute hypercapnic respiratory failure after the start of noninvasive ventilation in an emergency department]. / Relación entre la movilidad diafragmática medida por ecografía y la presión parcial arterial de CO2 en pacientes con insuficiencia respiratoria aguda hipercápnica tras el inicio de la ventilación mecánica no invasiva en urgencias.

OBJECTIVES: To evaluate the correlation between variations in ultrasound-measured diaphragm movement and changes in the arterial partial pressure of carbon dioxide (PCO2) after the start of noninvasive ventilation (NIV). MATERIAL AND METHODS: RDescriptive study of a prospective case series comprised of nonconsecutive patients aged 18 years or older with hypercapnic respiratory failure who were placed on NIV in an emergency department. We recorded clinical data, blood gas measurements, and ultrasound measurements of diaphragm movement. RESULTS: Twenty-one patients with a mean (SD) age of 83 (13) years were studied; 11 (52.4%) were women. The mean (SD) range of diaphragm movement and PCO2 values at 4 moments were as follows: 1) at baseline: diaphragm movement, 13.90 (7.7) mm and PCO2, 71.75 (11.4) mm Hg; 2) after 15 minutes on NIV: diaphragm movement, 17.10 (9.1) mm; 3) at 1 hour: diaphragm movement, 22.40 (10.4) mm and PCO2, 63.45 (16.0) mm Hg; and 4) at 3 hours: diaphragm movement, 26.60 (19.5) mm and PCO2, 61.85 (13.0) mm Hg. We detected a statistically significant correlation between the difference in range of diaphragm movement at baseline and at 15 minutes and the decrease in PCO2 after 1 hour of NIV (r=-0.489, P=.035). CONCLUSION: In patients with hypercapnic respiratory failure, the increase in range of diaphragm movement 15 minutes after starting NIV is associated with a decrease in PCO2 after 1 hour.

OBJETIVO: Correlacionar la variación de la movilidad diafragmática (MD), medida a través de ecografía, con el cambio en la presión parcial arterial de CO2 de (pCO2) tras el inicio de la ventilación mecánica no invasiva (VMNI). METODO: Estudio descriptivo de una serie de casos prospectivo que incluyó por oportunidad a los pacientes de 18 o más años con insuficiencia respiratoria hipercápnica en los que se inició la VMNI en urgencias. Se recogieron variables clínicas, gasométricas y mediciones ecográficas de la MD directa (MDD) y MD portal (MDP). RESULTADOS: Se incluyeron 21 pacientes, con una edad media de 83 (DE 13) años, de ellos 11 mujeres (52,4%). Los valores de MDD y pCO2 fueron: 1) basal: MDD 13,9 (DE 7,7) mm y pCO2 71,7 (DE: 11,4) mmHg; 2) 15 minutos: MDD 17,1 (DE 9,1) mm; 3) 1 hora: MDD 22,4 (DE 10,4) y pCO2 63,4 (DE: 16,0) mmHg; 4) 3 horas: MDD 26,6 (DE: 19,5) mm y pCO2 61,8 (DE :13,0) mmHg. Hubo correlación estadísticamente significativa entre la diferencia a los 15 minutos y basal de MDD y el descenso a la hora de pCO2 (r = ­0,489; p = 0,035). CONCLUSIONES: El aumento de la MDD a los 15 minutos del inicio de la VMNI se relaciona con una disminución de la pCO2 a la hora en los pacientes con insuficiencia respiratoria hipercápnica.