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Early experience with critically ill patients with COVID-19 in Montreal
Yiorgos Alexandros Cavayas1,2, Alexandre Noël3, Veronique Brunette3
1Service de Soins Intensifs, Hôpital du Sacré-Coeur de Montréal, CIUSSS du Nord-de l'île de Montréal, Département de Médecine, Université de Montréal, 5400 Gouin Ouest, Montreal, QC, H4J 1C5, Canada. yiorgos.alexandros.cavayas@umontreal.ca.
Insights
Critically ill COVID-19 patients in Montreal had similar characteristics and outcomes to other regions. Increased physiologic dead space suggests pulmonary vascular injury is key to COVID-19 lung damage.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Pulmonology
Background:
- Montreal was a major COVID-19 epicenter in Canada.
- Regional disparities in COVID-19 incidence and mortality were observed.
- Understanding local characteristics of critically ill patients is crucial.
Purpose of the Study:
- To describe local characteristics of critically ill COVID-19 patients in Montreal.
- To analyze treatments and outcomes of these patients.
- To compare Montreal's COVID-19 ICU patient data with existing literature.
Main Methods:
- Retrospective cohort study at a single center (Hôpital du Sacré-Cœur de Montréal).
- Included consecutive adult patients admitted to the intensive care unit (ICU) with confirmed COVID-19.
- Data collected between March 20 and May 13, 2020.
Main Results:
- 75 patients admitted; median age 62 years, high rates of obesity, hypertension, and diabetes.
- 57% required invasive mechanical ventilation (IMV) for a median of 11 days.
- Overall hospital mortality was 25%, with 82% mortality in patients aged 80+.
Conclusions:
- Characteristics and outcomes of critically ill COVID-19 patients in Montreal align with existing literature.
- An increased physiologic dead space was observed in ventilated patients.
- Pulmonary vascular injury is hypothesized to be central to COVID-19 lung damage.
Purpose:
Montreal has been the epicentre of the coronavirus disease (COVID-19) pandemic in Canada. Given the regional disparities in incidence and mortality in the general population, we aimed to describe local characteristics, treatments, and outcomes of critically ill COVID-19 patients in Montreal.
Methods:
A single-centre retrospective cohort of consecutive adult patients admitted to the intensive care unit (ICU) of Hôpital du Sacré-Coeur de Montréal with confirmed COVID-19 were included.
Results:
Between 20 March and 13 May 2020, 75 patients were admitted, with a median [interquartile range (IQR)] age of 62 [53-72] yr and high rates of obesity (47%), hypertension (67%), and diabetes (37%). Healthcare-related infections were responsible for 35% of cases. The median [IQR] day 1 sequential organ failure assessment score was 6 [3-7]. Invasive mechanical ventilation (IMV) was used in 57% of patients for a median [IQR] of 11 [5-22] days. Patients receiving IMV were characterized by a moderately decreased median [IQR] partial pressure of oxygen:fraction of inspired oxygen (day 1 PaO2:FiO2 = 177 [138-276]; day 10 = 173 [147-227]) and compliance (day 1 = 48 [38-58] mL/cmH2O; day 10 = 34 [28-42] mL/cmH2O) and very elevated estimated dead space fraction (day 1 = 0.60 [0.53-0.67]; day 10 = 0.72 [0.69-0.79]). Overall hospital mortality was 25%, and 21% in the IMV patients. Mortality was 82% in patients ≥ 80 yr old.
Conclusions:
Characteristics and outcomes of critically ill patients with COVID-19 in Montreal were similar to those reported in the existing literature. We found an increased physiologic dead space, supporting the hypothesis that pulmonary vascular injury may be central to COVID-19-induced lung damage.
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