Peri-operative SARS-CoV-2 infection increases postoperative mortality. The aim of this study was to determine the optimal duration of planned delay before surgery in patients who have had SARS-CoV-2 infection. This international, multicentre, prospective cohort study included patients undergoing elective or emergency surgery during October 2020. Surgical patients with pre-operative SARS-CoV-2 infection were compared with those without previous SARS-CoV-2 infection. The primary outcome measure was 30-day postoperative mortality. Logistic regression models were used to calculate adjusted 30-day mortality rates stratified by time from diagnosis of SARS-CoV-2 infection to surgery. Among 140,231 patients (116 countries), 3127 patients (2.2%) had a pre-operative SARS-CoV-2 diagnosis. Adjusted 30-day mortality in patients without SARS-CoV-2 infection was 1.5% (95%CI 1.4-1.5). In patients with a pre-operative SARS-CoV-2 diagnosis, mortality was increased in patients having surgery within 0-2 weeks, 3-4 weeks and 5-6 weeks of the diagnosis (odds ratio (95%CI) 4.1 (3.3-4.8), 3.9 (2.6-5.1) and 3.6 (2.0-5.2), respectively). Surgery performed ≥ 7 weeks after SARS-CoV-2 diagnosis was associated with a similar mortality risk to baseline (odds ratio (95%CI) 1.5 (0.9-2.1)). After a ≥ 7 week delay in undertaking surgery following SARS-CoV-2 infection, patients with ongoing symptoms had a higher mortality than patients whose symptoms had resolved or who had been asymptomatic (6.0% (95%CI 3.2-8.7) vs. 2.4% (95%CI 1.4-3.4) vs. 1.3% (95%CI 0.6-2.0), respectively). Where possible, surgery should be delayed for at least 7 weeks following SARS-CoV-2 infection. Patients with ongoing symptoms ≥ 7 weeks from diagnosis may benefit from further delay.

SARS-CoV-2 has been associated with an increased rate of venous thromboembolism in critically ill patients. Since surgical patients are already at higher risk of venous thromboembolism than general populations, this study aimed to determine if patients with peri-operative or prior SARS-CoV-2 were at further increased risk of venous thromboembolism. We conducted a planned sub-study and analysis from an international, multicentre, prospective cohort study of elective and emergency patients undergoing surgery during October 2020. Patients from all surgical specialties were included. The primary outcome measure was venous thromboembolism (pulmonary embolism or deep vein thrombosis) within 30 days of surgery. SARS-CoV-2 diagnosis was defined as peri-operative (7 days before to 30 days after surgery); recent (1-6 weeks before surgery); previous (≥7 weeks before surgery); or none. Information on prophylaxis regimens or pre-operative anti-coagulation for baseline comorbidities was not available. Postoperative venous thromboembolism rate was 0.5% (666/123,591) in patients without SARS-CoV-2; 2.2% (50/2317) in patients with peri-operative SARS-CoV-2; 1.6% (15/953) in patients with recent SARS-CoV-2; and 1.0% (11/1148) in patients with previous SARS-CoV-2. After adjustment for confounding factors, patients with peri-operative (adjusted odds ratio 1.5 (95%CI 1.1-2.0)) and recent SARS-CoV-2 (1.9 (95%CI 1.2-3.3)) remained at higher risk of venous thromboembolism, with a borderline finding in previous SARS-CoV-2 (1.7 (95%CI 0.9-3.0)). Overall, venous thromboembolism was independently associated with 30-day mortality ). In patients with SARS-CoV-2, mortality without venous thromboembolism was 7.4% (319/4342) and with venous thromboembolism was 40.8% (31/76). Patients undergoing surgery with peri-operative or recent SARS-CoV-2 appear to be at increased risk of postoperative venous thromboembolism compared with patients with no history of SARS-CoV-2 infection. Optimal venous thromboembolism prophylaxis and treatment are unknown in this cohort of patients, and these data should be interpreted accordingly.

Introduction The Lombardy region (Italy) suffered severe problems during the acute phase of the outbreak of COVID-19 in Italy (March-April 2020) with 16,000 diagnosed COVID-19 related deaths (49% of the total COVID-19 related deaths in Italy). In the area surrounding Pavia during the critical stage of the outbreak (March-April), 1,225 of the documented 4,200 deaths were related to COVID-19 infection, with a mortality rate of 181/100,000 inhabitants and an increase in deaths of 138% compared to the same period in previous years. Aim Our aim was to report the experience of the Department of Vascular Surgery of Pavia (Lombardy), including the lessons learned and future perspectives regarding the management of COVID-19 patients who developed severe acute ischemia with impending lower limb loss or deep vein thrombosis (DVT). Materials and Methods We carried out a retrospective data collection of COVID-19 patients with severe acute ischemia of the lower limbs or DVT observed in our Department during the period March 1 st to April 30 th 2020. Primary outcomes of the analysis were postoperative mortality for all patients and amputation rates only in those COVID-19 patients suffering from acute lower limb ischemia. Secondary outcomes were the prevalence of the disease among admitted COVID-19 patients, and any possible correlation between inflammatory parameters, thrombolytic status, and the presence of acute ischemia or DVT. Results We observed 38 patients (28 male) with severe COVID-19 infection (6 with lower limb arterial thrombosis and 32 with DVT). The median age was 64 years (range 30-94 years). In the arterial group, 3 had thrombosis on plaque and 3 on healthy arteries ("simple" arterial thrombosis). All underwent operative or hybrid (open/endo) revascularization; 1 patient died from major organ failure (MOF) and one patient underwent major amputation. In the DVT group, 9 (28%) patients died from MOF, despite aggressive medical therapy. In patients with "simple" arterial thrombosis and those with DVT, we observed a decrease in inflammatory parameters (CRP) and in D-dimer and fibrinogen after aggressive therapy (p <0.001). Conclusions Our study confirms that critically ill, COVID-19 patients who develop arterial and deep vein thrombosis are at high risk of mortality, but if treated properly, there is an improvement in overall survival rate, especially in patients of 60 years of age or younger.

Endovascular stent-grafting represents an effective therapeutic option for the management of aortobronchial fistula. Careful follow up of the patients is mandatory.