I n their Letter to the Editor, "Care and principles in chest drainage models during the pandemic by Covid-19", the authors discuss the topic of chest drainage in patients suspected or diagnosed with Covid-19. Indications of the procedure in patients with the disease are pneumothorax in about 1% and pleural effusion in 5% 1,2 . Carvalho Answer to the editor's letter 2 Rev Col Bras Cir 47:e20202765 changed our protocol. Today, we try to change the filter every 72 hours, evaluating the connection

more »

... daily and, in the event of any adversity, we perform the immediate change. Another limitation was in relation to the exchange due to the price of the filter. This is currently around R$ 100 reais and the way to charge the material was unusual. Also, the large amount of use in ICUs during the pandemic can restrict the use in drains. Thus, not all questions are still elucidated and our article tried to be one more measure for the protection of health professionals involved in the operation and in the maintenance and verification of the drain.