Pressure-support ventilation or T-piece spontaneous breathing trials for patients with chronic obstructive pulmonary disease : a randomized controlled trial

Background Little is known about the best strategy for weaning patients with chronic obstructive pulmonary disease (COPD) from mechanical ventilation. Spontaneous breathing trials (SBT) using a T-piece or pressure-support ventilation (PSV) have a central role in this process. Our aim was to compare T-piece and PSV SBTs according to the duration of mechanical ventilation (MV) in patients with COPD. Methods Patients with COPD who had at least 48 hours of invasive MV support were randomized to 30 minutes of T-piece or PSV at 10 cm H2O after being considered able to undergo a SBT. All patients were preemptively connected to non-invasive ventilation after extubation. Tracheostomized patients were excluded. The primary outcome was total invasive MV duration. Time to liberation from MV was assessed as secondary outcome. Results Between 2012 and 2016, 190 patients were randomized to T-piece (99) or PSV (91) groups. Extubation at first SBT was achieved in 78% of patients. The mean total MV duration was 10.82 ± 9.1 days for the T-piece group and 7.31 ± 4.9 days for the PSV group (p < 0.001); however, the pre-SBT duration also differed (7.35 ± 3.9 and 5.84 ± 3.3, respectively; p = 0.002). The time to liberation was 8.36 ± 11.04 days for the T-piece group and 4.06 ± 4.94 for the PSV group (univariate mean ratio = 2.06 [1.29±3.27], p = 0.003) for the subgroup of patients with difficult or prolonged weaning. The study group was independently associated with the time to liberation in this subgroup.Conclusions The SBT technique did not influence MV duration for patients with COPD. For the difficult/ prolonged weaning subgroup, the T-piece may be associated with a longer time to liberation, although this should be clarified by further studies

Frequência e fatores de risco para readmissão de pacientes criticamente enfermos

Introdução: A readmissão de pacientes nas unidades de terapia intensiva (UTIs) está associada a piores desfechos durante a internação hospitalar. Através da análise de preditores existe a possibilidade de identificar os pacientes sob risco de readmissão e planejar possíveis intervenções visando melhorar a segurança destes pacientes. Objetivos: Avaliar o desempenho da saturação venosa central (SvcO2), do lactato, do déficit de bases (DB), dos níveis de proteína C reativa (PCR), do Sequential Organ Failure Assessment (SOFA), do Stability and Workload Index for Transfer (SWIFT) escore do dia da alta da UTI como preditores e fatores de risco para readmissão de pacientes na unidade de terapia intensiva (UTI), além de verificar a frequência de readmissões na UTI. Métodos: O estudo avaliou pacientes criticamente enfermos internados consecutivamente na unidade de terapia intensiva do Hospital Nossa Senhora da Conceição que receberem alta da UTI, no período entre Agosto/2011 e Agosto/2012. Resultados principais: Utilizando análise multivariada o SOFA e o SWIFT da alta foram identificados como fatores de risco independentemente associados à readmissão na UTI. Entretanto, com uma área sob a curva receiver operating characteristic (ROC) de 0,63 e 0,66 respectivamente, estes escores podem não ter grande aplicabilidade clínica em nossa população. A PCR, a SvcO2, o DB e o lactato não estão associados a readmissão de pacientes críticos. Conclusões: Apesar do grande impacto clínico e econômico associado à readmissão de pacientes na UTI, nossa capacidade para discriminar os pacientes sob risco de readmissão e objetivar os critérios de alta dos pacientes críticos segue inadequada.Background: Readmission of patients in intensive care units (ICUs) is associated with worse outcomes during hospitalization. Possibly, identifying patients at risk for readmission through the analysis of predictors, some intervention may be planned for the security of these patients. Objectives: To evaluate the performance of central venous oxygen saturation (ScvO2), lactate, base deficit (BD), C-reactive protein (CRP), the Sequential Organ Failure Assessment (SOFA) score and the Stability and Workload Index for Transfer (SWIFT) score at the day of discharge from the intensive care unit (ICU) as predictors and risk factors for readmission or unexpected death among critically ill patients and to identify the frequency of readmissions in the ICU. Design: Prospective observational study. Location: academic tertiary hospital in Brazil. Patients: A total of 1,360 patients admitted to a 59 beds medical-surgical ICU from August 2011 to August 2012. Methods: We compared the characteristics and laboratory data of readmitted patients and not readmitted patients discharged from the ICU. Through multivariate analysis we identified potential risk factors independently associated with readmission. Main results: SOFA and SWIFT were identified as significant risk factors for ICU readmission. However, with an area under the ROC curve of 0.63 and 0.66, these scores would appear to have limited clinical applicability in our population. CRP, ScvO2, BD and lactate were not associated with readmission of critically ill patients. Conclusions: Perfusion and inflammatory markers are not good predictors of ICU readmission. Despite the clinical and economic impact associated with readmission in ICU, our ability to predict which patients will be readmitted is still inadequate

Frequência e fatores de risco para readmissão de pacientes criticamente enfermos

Introdução: A readmissão de pacientes nas unidades de terapia intensiva (UTIs) está associada a piores desfechos durante a internação hospitalar. Através da análise de preditores existe a possibilidade de identificar os pacientes sob risco de readmissão e planejar possíveis intervenções visando melhorar a segurança destes pacientes. Objetivos: Avaliar o desempenho da saturação venosa central (SvcO2), do lactato, do déficit de bases (DB), dos níveis de proteína C reativa (PCR), do Sequential Organ Failure Assessment (SOFA), do Stability and Workload Index for Transfer (SWIFT) escore do dia da alta da UTI como preditores e fatores de risco para readmissão de pacientes na unidade de terapia intensiva (UTI), além de verificar a frequência de readmissões na UTI. Métodos: O estudo avaliou pacientes criticamente enfermos internados consecutivamente na unidade de terapia intensiva do Hospital Nossa Senhora da Conceição que receberem alta da UTI, no período entre Agosto/2011 e Agosto/2012. Resultados principais: Utilizando análise multivariada o SOFA e o SWIFT da alta foram identificados como fatores de risco independentemente associados à readmissão na UTI. Entretanto, com uma área sob a curva receiver operating characteristic (ROC) de 0,63 e 0,66 respectivamente, estes escores podem não ter grande aplicabilidade clínica em nossa população. A PCR, a SvcO2, o DB e o lactato não estão associados a readmissão de pacientes críticos. Conclusões: Apesar do grande impacto clínico e econômico associado à readmissão de pacientes na UTI, nossa capacidade para discriminar os pacientes sob risco de readmissão e objetivar os critérios de alta dos pacientes críticos segue inadequada.Background: Readmission of patients in intensive care units (ICUs) is associated with worse outcomes during hospitalization. Possibly, identifying patients at risk for readmission through the analysis of predictors, some intervention may be planned for the security of these patients. Objectives: To evaluate the performance of central venous oxygen saturation (ScvO2), lactate, base deficit (BD), C-reactive protein (CRP), the Sequential Organ Failure Assessment (SOFA) score and the Stability and Workload Index for Transfer (SWIFT) score at the day of discharge from the intensive care unit (ICU) as predictors and risk factors for readmission or unexpected death among critically ill patients and to identify the frequency of readmissions in the ICU. Design: Prospective observational study. Location: academic tertiary hospital in Brazil. Patients: A total of 1,360 patients admitted to a 59 beds medical-surgical ICU from August 2011 to August 2012. Methods: We compared the characteristics and laboratory data of readmitted patients and not readmitted patients discharged from the ICU. Through multivariate analysis we identified potential risk factors independently associated with readmission. Main results: SOFA and SWIFT were identified as significant risk factors for ICU readmission. However, with an area under the ROC curve of 0.63 and 0.66, these scores would appear to have limited clinical applicability in our population. CRP, ScvO2, BD and lactate were not associated with readmission of critically ill patients. Conclusions: Perfusion and inflammatory markers are not good predictors of ICU readmission. Despite the clinical and economic impact associated with readmission in ICU, our ability to predict which patients will be readmitted is still inadequate

Inflammatory and perfusion markers as risk factors and predictors of critically ill patient readmission

Objetivo: Avaliar o desempenho da saturação venosa central, lactato, défice de bases, níveis de proteína C-reativa, escore SOFA e SWIFT do dia da alta da unidade de terapia intensiva como preditores para readmissão de pacientes na unidade de terapia intensiva. Métodos: Estudo prospectivo observacional com dados coletados de 1.360 pacientes internados consecutivamente no período de agosto de 2011 a agosto de 2012 em uma unidade de terapia intensiva clínico-cirúrgica. Foram comparadas as características clínicas e os dados laboratoriais dos pacientes readmitidos e dos pacientes não readmitidos após a alta da unidade de terapia intensiva. Por meio de análise multivariada, foram identificados os fatores de risco independentemente associados à readmissão. Resultados: A proteína C-reativa, a saturação venosa central, o défice de bases, o lactato, os escores SOFA e o SWIFT não foram associados à readmissão de pacientes graves. Pacientes mais idosos e a necessidade de isolamento de contato devido a germes multirresistentes foram identificados como fatores de risco independentemente associados à readmissão na população estudada. Conclusão: Os parâmetros inflamatórios e perfusionais não foram associados à readmissão. Idade e necessidade de isolamento de contato devido a germes multirresistentes foram identificados como preditores para readmissão na unidade de terapia intensiva.Objective: To assess the performance of central venous oxygen saturation, lactate, base deficit, and C-reactive protein levels and SOFA and SWIFT scores on the day of discharge from the intensive care unit as predictors of patient readmission to the intensive care unit. Methods: This prospective and observational study collected data from 1,360 patients who were admitted consecutively to a clinical-surgical intensive care unit from August 2011 to August 2012. The clinical characteristics and laboratory data of readmitted and non-readmitted patients after discharge from the intensive care unit were compared. Using a multivariate analysis, the risk factors independently associated with readmission were identified. Results: The C-reactive protein, central venous oxygen saturation, base deficit, and lactate levels and the SWIFT and SOFA scores did not correlate with the readmission of critically ill patients. Increased age and contact isolation because of multidrug-resistant organisms were identified as risk factors that were independently associated with readmission in this study group. Conclusion: Inflammatory and perfusion parameters were not associated with patient readmission. Increased age and contact isolation because of multidrug-resistant organisms were identified as predictors of readmission to the intensive care unit

Inflammatory and perfusion markers as risk factors and predictors of critically ill patient readmission

Objetivo: Avaliar o desempenho da saturação venosa central, lactato, défice de bases, níveis de proteína C-reativa, escore SOFA e SWIFT do dia da alta da unidade de terapia intensiva como preditores para readmissão de pacientes na unidade de terapia intensiva. Métodos: Estudo prospectivo observacional com dados coletados de 1.360 pacientes internados consecutivamente no período de agosto de 2011 a agosto de 2012 em uma unidade de terapia intensiva clínico-cirúrgica. Foram comparadas as características clínicas e os dados laboratoriais dos pacientes readmitidos e dos pacientes não readmitidos após a alta da unidade de terapia intensiva. Por meio de análise multivariada, foram identificados os fatores de risco independentemente associados à readmissão. Resultados: A proteína C-reativa, a saturação venosa central, o défice de bases, o lactato, os escores SOFA e o SWIFT não foram associados à readmissão de pacientes graves. Pacientes mais idosos e a necessidade de isolamento de contato devido a germes multirresistentes foram identificados como fatores de risco independentemente associados à readmissão na população estudada. Conclusão: Os parâmetros inflamatórios e perfusionais não foram associados à readmissão. Idade e necessidade de isolamento de contato devido a germes multirresistentes foram identificados como preditores para readmissão na unidade de terapia intensiva

Inflammatory and perfusion markers as risk factors and predictors of critically ill patient readmission

Objetivo: Avaliar o desempenho da saturação venosa central, lactato, défice de bases, níveis de proteína C-reativa, escore SOFA e SWIFT do dia da alta da unidade de terapia intensiva como preditores para readmissão de pacientes na unidade de terapia intensiva. Métodos: Estudo prospectivo observacional com dados coletados de 1.360 pacientes internados consecutivamente no período de agosto de 2011 a agosto de 2012 em uma unidade de terapia intensiva clínico-cirúrgica. Foram comparadas as características clínicas e os dados laboratoriais dos pacientes readmitidos e dos pacientes não readmitidos após a alta da unidade de terapia intensiva. Por meio de análise multivariada, foram identificados os fatores de risco independentemente associados à readmissão. Resultados: A proteína C-reativa, a saturação venosa central, o défice de bases, o lactato, os escores SOFA e o SWIFT não foram associados à readmissão de pacientes graves. Pacientes mais idosos e a necessidade de isolamento de contato devido a germes multirresistentes foram identificados como fatores de risco independentemente associados à readmissão na população estudada. Conclusão: Os parâmetros inflamatórios e perfusionais não foram associados à readmissão. Idade e necessidade de isolamento de contato devido a germes multirresistentes foram identificados como preditores para readmissão na unidade de terapia intensiva.Objective: To assess the performance of central venous oxygen saturation, lactate, base deficit, and C-reactive protein levels and SOFA and SWIFT scores on the day of discharge from the intensive care unit as predictors of patient readmission to the intensive care unit. Methods: This prospective and observational study collected data from 1,360 patients who were admitted consecutively to a clinical-surgical intensive care unit from August 2011 to August 2012. The clinical characteristics and laboratory data of readmitted and non-readmitted patients after discharge from the intensive care unit were compared. Using a multivariate analysis, the risk factors independently associated with readmission were identified. Results: The C-reactive protein, central venous oxygen saturation, base deficit, and lactate levels and the SWIFT and SOFA scores did not correlate with the readmission of critically ill patients. Increased age and contact isolation because of multidrug-resistant organisms were identified as risk factors that were independently associated with readmission in this study group. Conclusion: Inflammatory and perfusion parameters were not associated with patient readmission. Increased age and contact isolation because of multidrug-resistant organisms were identified as predictors of readmission to the intensive care unit

Pressure-support ventilation or T-piece spontaneous breathing trials for patients with chronic obstructive pulmonary disease - A randomized controlled trial.

BACKGROUND:Little is known about the best strategy for weaning patients with chronic obstructive pulmonary disease (COPD) from mechanical ventilation. Spontaneous breathing trials (SBT) using a T-piece or pressure-support ventilation (PSV) have a central role in this process. Our aim was to compare T-piece and PSV SBTs according to the duration of mechanical ventilation (MV) in patients with COPD. METHODS:Patients with COPD who had at least 48 hours of invasive MV support were randomized to 30 minutes of T-piece or PSV at 10 cm H2O after being considered able to undergo a SBT. All patients were preemptively connected to non-invasive ventilation after extubation. Tracheostomized patients were excluded. The primary outcome was total invasive MV duration. Time to liberation from MV was assessed as secondary outcome. RESULTS:Between 2012 and 2016, 190 patients were randomized to T-piece (99) or PSV (91) groups. Extubation at first SBT was achieved in 78% of patients. The mean total MV duration was 10.82 ± 9.1 days for the T-piece group and 7.31 ± 4.9 days for the PSV group (p < 0.001); however, the pre-SBT duration also differed (7.35 ± 3.9 and 5.84 ± 3.3, respectively; p = 0.002). The time to liberation was 8.36 ± 11.04 days for the T-piece group and 4.06 ± 4.94 for the PSV group (univariate mean ratio = 2.06 [1.29-3.27], p = 0.003) for the subgroup of patients with difficult or prolonged weaning. The study group was independently associated with the time to liberation in this subgroup. CONCLUSIONS:The SBT technique did not influence MV duration for patients with COPD. For the difficult/prolonged weaning subgroup, the T-piece may be associated with a longer time to liberation, although this should be clarified by further studies. TRIAL REGISTRATION:ClinicalTrials.gov NCT01464567, at November 3, 2011

Pressure-support ventilation or T-piece spontaneous breathing trials for patients with chronic obstructive pulmonary disease : a randomized controlled trial

Background Little is known about the best strategy for weaning patients with chronic obstructive pulmonary disease (COPD) from mechanical ventilation. Spontaneous breathing trials (SBT) using a T-piece or pressure-support ventilation (PSV) have a central role in this process. Our aim was to compare T-piece and PSV SBTs according to the duration of mechanical ventilation (MV) in patients with COPD. Methods Patients with COPD who had at least 48 hours of invasive MV support were randomized to 30 minutes of T-piece or PSV at 10 cm H2O after being considered able to undergo a SBT. All patients were preemptively connected to non-invasive ventilation after extubation. Tracheostomized patients were excluded. The primary outcome was total invasive MV duration. Time to liberation from MV was assessed as secondary outcome. Results Between 2012 and 2016, 190 patients were randomized to T-piece (99) or PSV (91) groups. Extubation at first SBT was achieved in 78% of patients. The mean total MV duration was 10.82 ± 9.1 days for the T-piece group and 7.31 ± 4.9 days for the PSV group (p < 0.001); however, the pre-SBT duration also differed (7.35 ± 3.9 and 5.84 ± 3.3, respectively; p = 0.002). The time to liberation was 8.36 ± 11.04 days for the T-piece group and 4.06 ± 4.94 for the PSV group (univariate mean ratio = 2.06 [1.29±3.27], p = 0.003) for the subgroup of patients with difficult or prolonged weaning. The study group was independently associated with the time to liberation in this subgroup.Conclusions The SBT technique did not influence MV duration for patients with COPD. For the difficult/ prolonged weaning subgroup, the T-piece may be associated with a longer time to liberation, although this should be clarified by further studies

Epidemiological characteristics, practice of ventilation, and clinical outcome in patients at risk of acute respiratory distress syndrome in intensive care units from 16 countries (PRoVENT): an international, multicentre, prospective study

Background Scant information exists about the epidemiological characteristics and outcome of patients in the intensive care unit (ICU) at risk of acute respiratory distress syndrome (ARDS) and how ventilation is managed in these individuals. We aimed to establish the epidemiological characteristics of patients at risk of ARDS, describe ventilation management in this population, and assess outcomes compared with people at no risk of ARDS. Methods PRoVENT (PRactice of VENTilation in critically ill patients without ARDS at onset of ventilation) is an international, multicentre, prospective study undertaken at 119 ICUs in 16 countries worldwide. All patients aged 18 years or older who were receiving mechanical ventilation in participating ICUs during a 1-week period between January, 2014, and January, 2015, were enrolled into the study. The Lung Injury Prediction Score (LIPS) was used to stratify risk of ARDS, with a score of 4 or higher defining those at risk of ARDS. The primary outcome was the proportion of patients at risk of ARDS. Secondary outcomes included ventilatory management (including tidal volume [VT] expressed as mL/kg predicted bodyweight [PBW], and positive end-expiratory pressure [PEEP] expressed as cm H2O), development of pulmonary complications, and clinical outcomes. The PRoVENT study is registered at ClinicalTrials.gov, NCT01868321. The study has been completed. Findings Of 3023 patients screened for the study, 935 individuals fulfilled the inclusion criteria. Of these critically ill patients, 282 were at risk of ARDS (30%, 95% CI 27\u201333), representing 0\ub714 cases per ICU bed over a 1-week period. VT was similar for patients at risk and not at risk of ARDS (median 7\ub76 mL/kg PBW [IQR 6\ub77\u20139\ub71] vs 7\ub79 mL/kg PBW [6\ub78\u20139\ub71]; p=0\ub7346). PEEP was higher in patients at risk of ARDS compared with those not at risk (median 6\ub70 cm H2O [IQR 5\ub70\u20138\ub70] vs 5\ub70 cm H2O [5\ub70\u20137\ub70]; p&lt;0\ub70001). The prevalence of ARDS in patients at risk of ARDS was higher than in individuals not at risk of ARDS (19/260 [7%] vs 17/556 [3%]; p=0\ub7004). Compared with individuals not at risk of ARDS, patients at risk of ARDS had higher in-hospital mortality (86/543 [16%] vs 74/232 [32%]; p&lt;0\ub70001), ICU mortality (62/533 [12%] vs 66/227 [29%]; p&lt;0\ub70001), and 90-day mortality (109/653 [17%] vs 88/282 [31%]; p&lt;0\ub70001). VT did not differ between patients who did and did not develop ARDS (p=0\ub7471 for those at risk of ARDS; p=0\ub7323 for those not at risk). Interpretation Around a third of patients receiving mechanical ventilation in the ICU were at risk of ARDS. Pulmonary complications occur frequently in patients at risk of ARDS and their clinical outcome is worse compared with those not at risk of ARDS. There is potential for improvement in the management of patients without ARDS. Further refinements are needed for prediction of ARDS