ABSTRACT
Pneumothorax is a rare complication among mechanically ventilated patients since low tidal volumes are used nowadays instead of traditional high tidal volumes, but the incidence is slightly higher in patients with high positive end-expiratory pressure (PEEP). Herein we describe a case series of nine patients who were on mechanical ventilation due to acute respiratory distress syndrome (ARDS) secondary to coronavirus disease 2019 (COVID-19) and developed pneumothorax in due course. A retrospective analysis was done on COVID-19 intubated patients from March 2020 to June 2020 in a community hospital in Central New Jersey, which was one of the early hit states in the United States at the beginning of the pandemic. Outcomes were studied. The demographics of patients like age, gender, and body mass index (BMI); risk factors like smoking, comorbidities especially chronic lung disease, and the treatment they received were compared. We compared the total number of days on the ventilator, the highest PEEP they received, and the ventilator day when pneumothorax developed. All the patients who developed pneumothorax had a chest tube inserted to treat it. The mortality was noted to be 100% indicating that pneumothorax is a life-threatening complication of COVID-19 and COVID-19 by itself is a risk factor for pneumothorax likely due to a change in lung mechanics. There is a need for large-scale studies to confirm that these outcomes are related to COVID-19.
ABSTRACT
Pneumothorax is a rare complication among mechanically ventilated patients since low tidal volumes are used nowadays instead of traditional high tidal volumes, but the incidence is slightly higher in patients with high positive end-expiratory pressure (PEEP). Herein we describe a case series of nine patients who were on mechanical ventilation due to acute respiratory distress syndrome (ARDS) secondary to coronavirus disease 2019 (COVID-19) and developed pneumothorax in due course. A retrospective analysis was done on COVID-19 intubated patients from March 2020 to June 2020 in a community hospital in Central New Jersey, which was one of the early hit states in the United States at the beginning of the pandemic. Outcomes were studied. The demographics of patients like age, gender, and body mass index (BMI);risk factors like smoking, comorbidities especially chronic lung disease, and the treatment they received were compared. We compared the total number of days on the ventilator, the highest PEEP they received, and the ventilator day when pneumothorax developed. All the patients who developed pneumothorax had a chest tube inserted to treat it. The mortality was noted to be 100% indicating that pneumothorax is a life-threatening complication of COVID-19 and COVID-19 by itself is a risk factor for pneumothorax likely due to a change in lung mechanics. There is a need for large-scale studies to confirm that these outcomes are related to COVID-19.
ABSTRACT
BACKGROUND: The clinical features and outcomes of mechanically ventilated patients with COVID-19 infection who develop a pneumothorax has not been rigorously described or compared to those who do not develop a pneumothorax. PURPOSE: To determine the incidence, clinical characteristics, and outcomes of critically ill patients with COVID-19 infection who developed pneumothorax. In addition, we compared the clinical characteristics and outcomes of mechanically ventilated patients who developed a pneumothorax with those who did not develop a pneumothorax. METHODS: This study was a multicenter retrospective analysis of all adult critically ill patients with COVID-19 infection who were admitted to intensive care units in 4 tertiary care centers in the United States. RESULTS: A total of 842 critically ill patients with COVID-19 infection were analyzed, out of which 594 (71%) were mechanically ventilated. The overall incidence of pneumothorax was 85/842 (10%), and 80/594 (13%) in those who were mechanically ventilated. As compared to mechanically ventilated patients in the non-pneumothorax group, mechanically ventilated patients in the pneumothorax group had worse respiratory parameters at the time of intubation (mean PaO2:FiO2 ratio 105 vs 150, P<0.001 and static respiratory system compliance: 30ml/cmH2O vs 39ml/cmH2O, P = 0.01) and significantly higher in-hospital mortality (63% vs 49%, P = 0.04). CONCLUSION: The overall incidence of pneumothorax in mechanically ventilated patients with COVID-19 infection was 13%. Mechanically ventilated patients with COVID-19 infection who developed pneumothorax had worse gas exchange and respiratory mechanics at the time of intubation and had a higher mortality compared to those who did not develop pneumothorax.