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Objectives: At the beginning of the pandemic, it was believed that severe SARS-CoV2 infection would induce lifelong immunity and that reinfections would be unlikely. However, several cases of reinfection were documented in previously infected patient and the waning humoral immunity has raised significant concerns. Accordingly, long-term and durable vaccineinduce antibody protection against infection have also become a challenge, as several breakthroughs of COVID-19 have been identified in individuals partially or fully vaccinated. This study describes the incidence, the characteristics of severe COVID-19 infections requiring ECMO occurred after vaccination and the presence of side effects related to the vaccine. Method(s): EuroECMO COVID is a prospective, multicenter, observational study, developed by the EuroELSO, based on data from patients aged >=16 years who received ECMO support for refractory COVID-19 during the pandemic in 204 centers. The analysis investigates the survival of vaccinated patient, the associations between management-related variables, the incidence of vaccination during the different pandemic phases, the type of vaccines and the possible side effects. Result(s): Immunosuppressed patients are susceptible to reinfection even after being naturally infected or receiving a full vaccination. Ineffective antibody production, due to relatively ineffective vaccines, inadequate number of doses or the time after vaccination are involved in the pathogenesis of postvaccination infections. This population was found to have a partial immunity due to an inadequate number of doses and an overlapped time from vaccination and SARS-CoV2 incubation with PCR results after being vaccinated. Several manifestations of SARS-CoV2 infection are similar to vaccine-induce side effects and mild symptoms can be presented both as an adverse reaction after vaccination and a result of infection. In this subgroup no side effects were attributable to the vaccine. Conclusion(s): Vaccination does not entirely prevent SARS-CoV2 but will lead to less morbidity and mortality, as demonstrated by less need of ICU and ECMO care. In addition, the partial immunity for inadequate doses of vaccine or through the evolution of new variants demonstrated the importance of further analysis to differentiate the possible causes of waning humoral immunity.
ABSTRACT
Objective: The use of angiotensin II in invasively ventilated patients with coronavirus disease 2019 (COVID-19) is controversial. Its effect on organ function is unknown. Design: Prospective observational study. Setting: Intensive care unit (ICU) of a tertiary academic hospital in Milan, Italy. Participants: Adult patients receiving mechanical ventilation due to COVID-19. Interventions: Use angiotensin II either as rescue vasopressor agent or as low dose vasopressor support. Main outcome measures: Patients treated before angiotensin II was available or treated in an adjacent COVID-19 ICU served as controls. For data analysis, we applied Bayesian modelling as appropriate. We assessed the effects of angiotensin II on organ function. Results: We compared 46 patients receiving angiotensin II therapy with 53 controls. Compared with controls, angiotensin II increased the mean arterial pressure (median difference, 9.05 mmHg;95% CI, 1.87-16.22;P = 0.013) and the PaO2/FiO(2) ratio (median difference, 23.17;95% CI, 3.46-42.88;P = 0.021), and decreased the odds ratio (OR) of liver dysfunction (OR, 0.32;95% CI, 0.09-0.94). However, angiotensin II had no effect on lactate, urinary output, serum creatinine, C-reactive protein, platelet count, or thromboembolic complications. In patients with abnormal baseline serum creatinine, Bayesian modelling showed that angiotensin II carried a 95.7% probability of reducing the use of renal replacement therapy (RRT). Conclusions: In ventilated patients with COVID-19, angiotensin II therapy increased blood pressure and PaO2/FiO(2) ratios, decreased the OR of liver dysfunction, and appeared to decrease the risk of RRT use in patients with abnormal baseline serum creatinine. However, all of these findings are hypothesis-generating only.
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Objective: Describe characteristics, daily care and outcomes of patients with coronavirus disease 2019 (COVID-19) acute respiratory distress syndrome (ARDS). Design: Case series of 73 patients. Setting: Large tertiary hospital in Milan. Participants: Mechanically ventilated patients with confirmed COVID-19 admitted to the intensive care unit (ICU) between 20 February and 2 April 2020. Main outcome measures: Demographic and daily clinical data were collected to identify predictors of early mortality. Results: Of the 73 patients included in the study, most were male (83.6%), the median age was 61 years (interquartile range [IQR], 54-69 years), and hypertension affected 52.9% of patients. Lymphocytopenia (median, 0.77 x 103 per mm3 ;IQR, 0.58-1.00 x 103 per mm3), hyperinflammation with C-reactive protein (median, 184.5 mg/dL;IQR, 108.2-269.1 mg/dL) and pro-coagulant status with D-dimer (median, 10.1 mug/m;IQR, 5.0-23.8 mug/m) were present. Median tidal volume was 6.7 mL/kg (IQR, 6.0-7.5 mL/kg), and median positive end-expiratory pressure was 12 cmH2O (IQR, 10-14 cmH2O). In the first 3 days, prone positioning (12-16 h) was used in 63.8% of patients and extracorporeal membrane oxygenation in five patients (6.8%). After a median follow-up of 19.0 days (IQR, 15.0-27.0 days), 17 patients (23.3%) had died, 23 (31.5%) had been discharged from the ICU, and 33 (45.2%) were receiving invasive mechanical ventilation in the ICU. Older age (odds ratio [OR], 1.12;95% CI, 1.04-1.22;P = 0.004) and hypertension (OR, 6.15;95% CI, 1.75-29.11;P = 0.009) were associated with mortality, while early improvement in arterial partial pressure of oxygen (PaO2) to fraction of inspired oxygen (FiO2) ratio was associated with being discharged alive from the ICU (P = 0.002 for interaction). Conclusions: Despite multiple advanced critical care interventions, COVID-19 ARDS was associated with prolonged ventilation and high short term mortality. Older age and pre-admission hypertension were key mortality risk factors. Trial registration: ClinicalTrials.gov identifier: NCT04318366.
ABSTRACT
At the end of 2019, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) outbreak spread from China all around the world, causing thousands of deaths. In Italy, the hardest hit region was Lombardy, with the first reported case on 20 February 2020. San Raffaele Scientific Institute - a large tertiary hospital and research centre in Milan, Italy - was immediately involved in the management of the public health emergency. Since the beginning of the outbreak, the elective surgical activity of the hospital was rapidly reduced and large areas of the hospital were simultaneously reorganised to admit and assist patients with coronavirus disease 2019 (COVID-19). In addition, the hospital became the regional referral hub for cardiovascular emergencies in order to keep ensuring a high level of health care to non-COVID-19 patients in northern Italy. In a few days, a COVID-19 emergency department was created, improving the general ward capacity to a total number of 279 beds dedicated to patients with COVID-19. Moreover, the number of intensive care unit (ICU) beds was increased from 28 to 72 (54 of them dedicated to patients with COVID-19, and 18 to cardiology and cardiac surgery hub emergencies), both converting pre-existing areas and creating new high technology spaces. All the involved health care personnel were rapidly trained to use personal protection equipment and to manage this particular category of patients both in general wards and ICUs. Furthermore, besides clinical activities, continuously important research projects were carried out in order to find new strategies and more effective therapies to better face an unprecedented health emergency in Italy.
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Objective: Describe characteristics, daily care and outcomes of patients with coronavirus disease 2019 (COVID-19) acute respiratory distress syndrome (ARDS). Design: Case series of 73 patients. Setting: Large tertiary hospital in Milan. Participants: Mechanically ventilated patients with confirmed COVID-19 admitted to the intensive care unit (ICU) between 20 February and 2 April 2020. Main outcome measures: Demographic and daily clinical data were collected to identify predictors of early mortality. Results: Of the 73 patients included in the study, most were male (83.6%), the median age was 61 years (interquartile range [IQR], 54-69 years), and hypertension affected 52.9% of patients. Lymphocytopenia (median, 0.77 x 10(3) per mm(3);IQR, 0.58-1.00 x 10(3) per mm(3)), hyperinflammation with C-reactive protein (median, 184.5 mg/dL;IQR, 108.2-269.1 mg/dL) and pro-coagulant status with D-dimer (median, 10.1 mu g/m;IQR, 5.0-23.8 mu g/m) were present. Median tidal volume was 6.7 mUkg (IQR, 6.0-7.5 mL/kg), and median positive end-expiratory pressure was 12 cmH(2)O (IQR, 10-14 cmH(2)O). In the first 3 days, prone positioning (12-16 h) was used in 63.8% of patients and extracorporeal membrane oxygenation in five patients (6.8%). After a median followup of 19.0 days (IQR, 15.0-27.0 days), 17 patients (23.3%) had died, 23 (31.5%) had been discharged from the ICU, and 33 (45.2%) were receiving invasive mechanical ventilation in the ICU. Older age (odds ratio [OR], 1.12;95% CI, 1.04-1.22;P= 0.004) and hypertension (OR, 6.15;95% CI, 1.75-29.11;P = 0.009) were associated with mortality, while early improvement in arterial partial pressure of oxygen (Pao(2) ) to fraction of inspired oxygen (Fio(2)) ratio was associated with being discharged alive from the ICU (P = 0.002 for interaction). Conclusions: Despite multiple advanced critical care interventions, COVID-19 ARDS was associated with prolonged ventilation and high short term mortality. Older age and pre-admission hypertension were key mortality risk factors.
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We suggest the use of MicroCLOTS (microvascular COVID-19 lung vessels obstructive thromboinflammatory syndrome) as a new name for severe pulmonary coronavirus disease 2019 (COVID-19). We hypothesise that, in predisposed individuals, alveolar viral damage is followed by an inflammatory reaction and by microvascular pulmonary thrombosis. This progressive endothelial thromboinflammatory syndrome may also involve the microvascular bed of the brain and other vital organs, leading to multiple organ failure and death. Future steps in the understanding of the disease and in the identification of treatments may benefit from this definition and hypothesised sequence of events.