Respiratory function tests in the COVID-19 pandemic era. An update

Summary In June 2020, indications were developed for the resumption of pulmonary function testing in the course of a SARS-CoV-2 pandemic, in support of national, regional and company direc-tives, as well as for pulmonologists dedicated to pulmonary function laboratories. The present document represents an update of the previous one in the light of new knowledge and the current SARS-CoV-2 epidemiological situation.

N-acetylcysteine as a therapeutic approach to post-COVID-19 pulmonary fibrosis adjunctive treatment.

OBJECTIVE: Growing interest is directed to the outcomes of COVID-19 in survivors, both in the convalescent period and in the long-term, which are responsible for morbidity and quality of life deterioration. This article aims to describe the mechanisms supporting the possible use of NAC as an adjuvant treatment for post-COVID-19 pulmonary fibrosis. MATERIALS AND METHODS: A search was performed in PubMed/MEDLINE. RESULTS: Interstitial changes have been observed in the CT scan of COVID-19 pneumonia. In patients with respiratory outcomes in the post-COVID-19 stage, glutathione (GSH) deficiency was found and interpreted as a reaction to the inflammatory cascade caused by the viral infection, while the pathophysiological process of pulmonary fibrosis involves numerous cytokines, such as TGF-ß, TNF-α, IL-1, PDGF and VEGF. NAC has a good tolerability profile, is easily administered orally and inexpensively, and has antioxidant and anti-inflammatory effects that may target the pathophysiologic mechanisms involved in pulmonary fibrosis. It may revert GSH deficiency, exerts direct and indirect antioxidant activity, anti-inflammatory activity and improves immune T-cell response. CONCLUSIONS: The mechanism of action of NAC suggests a role in the treatment of pulmonary fibrosis induced by COVID-19.

How covid-19 pandemic impacted integrated care pathways for lung cancer: the experience of two Italian centers in veneto region

Background: COVID-19 pandemic has represented a historic challenge to healthcare systems. The management of cancer care has become a crucial issue for clinical services to cancer patients. During the COVID-19 pandemic, raising evidence has been published on lung cancer care but no data have been presented on the integrated care pathways (ICP) impact. Materials and methods: We retrospectively reviewed the ICPs of consecutive lung cancer patients who accessed two Centres before and after COVID-19 pandemic: the Veneto Institute of Oncology (IOV)/University Hospital of Padua and University Hospital of Verona. Sixteen indicators about oncology, radiaton therapy, thoracic surgery, pathology and pneumology were developed using groupfacilitation techniques taking into account their reproducibility, significance, measurability. We report data extracted from electronic medical records and linked softwares, about MDT performance at the two participating Centres, and preliminary data about pathological and oncological indicators in Padua. Additional data about both complete ICPs will be presented at the Conference. Results: We compared data about ICP performance in two window periods: 1/3/2019-30/4/2019 and 1/3/2020- 30/4/2020. MDT meetings were reshaped in order to discuss those cases where more than two specialists were required and whenever possible on a web-basis;therefore, it determined an average reduction of patients discussed of 57.5%. Preliminary data from Padua showed that median time between diagnostic procedure and diagnosis was reduced from 11 days in 2019 to 7.5 days in 2020, mostly due to a prioritization of oncological procedures over any other. Moreover, a 39% reduction of first oncological visits was observed between the two time frames;this was linked to a reduction of out of region second opinion and to optimization of outpatient access. Among patients under oncological treatment, 12(4%) and 8(2%) patients received treatment within 30 days from death in 2019 and 2020, respectively. Conclusions: Based on the experience the two Centres went through, we identified the key steps in ICP impacted by a pandemic such COVID-19 so to proactively put in place robust service provision in thoracic oncology.

Vitamin D and disease severity in coronavirus disease 19 (COVID-19).

The role of 25-OH-vitamin D in the assessment of coronavirus disease 19 (COVID-19) has not been investigated. We sought to investigate the prevalence of 25-OH-vitamin D deficiency among COVID-19 patients, and to determine the associations between 25-OH-vitamin D status and the severity of the disease. We have conducted a retrospective observational study of COVID-19 patients admitted to the University of Verona Hospital Trust. Demographic, clinical and biochemical parameters were collected at hospital admission, and serum 25-OH-vitamin D levels were measured. The following outcomes were assessed: arterial partial oxygen pressure (PaO2); C-reactive protein (CRP); length of hospitalization; requirement of oxygen therapy; non-invasive ventilation (NIV); mechanical ventilation; and death. Among 61 patients enrolled, 72.1% was 25-OH-vitamin D deficient (<20 ng/mL) and 57.4% had 25-OHvitamin D <15 ng/mL. Patients with arterial PaO2 <60 mmHg had significantly lower mean 25-OH-vitamin D levels compared to patients with PaO2 ≥60 mmHg (13.3 ng/mL vs 20.4 ng/mL respectively, p=0.03). Vitamin D deficiency was associated with 3-fold higher risk of having arterial pO2 <60 mmHg. 25-OH-vitamin D deficiency was associated with increased CRP and dyspnea. 25-OH-vitamin D deficiency was associated with more severe systemic inflammatory response and respiratory failure in COVID-19 patients.