Correlation between different operation timing of pulmonary surgery and intraoperative intrapulmo-nary shunt rate in patients with SARS-CoV-2 infection
Objective To investigate the correlation between different operation timing of thoraco-scopic partial pneumonectomy and intraoperative intrapulmonary shunt rate in patients with novel coronavirus(SARS-CoV-2)infection.Methods A total of 120 patients,65 males and 55 females,aged 30-75 years,BMI 18.5-25.0 kg/m2,ASA physical status Ⅰ or Ⅱ,scheduled for elective thoracoscopic partial pneumo-nectomy from December 2022 to May 2023 were selected.The patients with SARS-CoV-2 infection were di-vided into three groups according to different operation timing after infection:5-8 weeks after infection(group B),9-12 weeks after infection(group C),and 13-16 weeks after infection(group D),30 pa-tients in each group.In addition,30 non-infected patients were selected as the control group(group A).Blood gas analysis was performed at 10 minutes of two-lung ventilation(TLV)and 15 and 30 minutes of one-lung ventilation(OLV)to measure radial artery and mixed venous blood gases.Intrapulmonary shunt rate(Qs/Qt)was calculated accordingly.Multiple linear regression analysis was used to investigate the cor-relation between different operation timing and intrapulmonary shunt rate in patients with SARS-CoV-2 infec-tion.The occurrence of postoperative pulmonary complications(PPCs)within 7 days after surgery was re-corded.Results Compared with group A,groups B and C exhibited significant decreases in PaO2 levels and increases in Qs/Qt ratios at 10 minutes of TLV as well as at 15 and 30 minutes of OLV(P＜0.05),group D exhibited significant decreases in PaO2 levels and increases in Qs/Qt ratios at 15 and 30 minutes of OLV(P＜0.05),group B exhibited significant increases in postoperative pulmonary infection rates and the incidence of respiratory failure within 7 days after surgery(P＜0.05).Compared with group B,the inci-dence of pulmonary infection and respiratory failure within 7 days after surgery were significantly reduced in group D(P＜0.05).Multiple linear regression analysis revealed that shorter infection time(β=-0.478,95％CI-3.857 to-1.231,P＜0.001),worsening clinical types of infection(β=0.274,95％CI 0.368 to 3.453,P=0.016),and preoperative persistent symptoms(β=-0.240,95％CI-5.986 to-0.537,P=0.019)were associated with increased intrapulmonary shunt rate at 10 minutes of TLV.Shor-ter infection time(β=0.267,95％CI 0.130 to 3.018,P=0.033),worsening clinical types of infection(β=-0.391,95％CI-4.715 to-1.323,P=0.001),preoperative persistent symptoms(β=-0.497,95％CI-10.484 to-4.491,P＜0.001),and preoperative dyspnea(β=-0.246,95％CI-8.596 to-0.691,P=0.022)were associated with increased intrapulmonary shunt rate at 15 minutes of OLV.Conclusion SARS-CoV-2 infection increases intrapulmonary shunt rate 5-8 and 9-12 weeks after infection,but the intrapulmonary shunt rate gradually recovers at 10 minutes of TLV 13-16 weeks after in-fection,and patients who undergo surgery during this interval have a lower incidence of PPCs.The shorter infection time,the aggravation of clinical classification of infection,and the presence of persistent symptoms before surgery are associated with the increase of intrapulmonary shunt rate.
万方数据
维普
