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Chinese Journal of Lung Diseases(Electronic Edition) ›› 2024, Vol. 17 ›› Issue (05): 725-730. doi: 10.3877/cma.j.issn.1674-6902.2024.05.010

• Original articles • Previous Articles    

Significance of VE/VCO2 slope in predicting cardiovascular complications after pulmonary lobectomy for lung cancer

Weifeng Zhang1, Tianyi Zhang1, Zhengwei Zhao1,(), Haiqiang Wang1, Xunliang Yin1   

  1. 1.Department of cerebral surgery, The Second Affiliated Hospital of Air Force Military Medical University, shaanxi Xi′an 710038, China
  • Received:2024-02-17 Online:2024-10-25 Published:2024-12-03
  • Contact: Zhengwei Zhao

Abstract:

Objective

To analyze the predictive value of carbon dioxide ventilation equivalent (VE/VCO2) slope on postoperative cardiovascular complications in patients with carcinoma of the lungs undergoing lobectomy.

Methods

A total of 169 patients with lobectomy were admitted to the hospital from March 2021 to March 2022, who were all treated with thoracoscopic lobectomy. The patients were followed up for 30 days and divided into observation group (complications) and control group (no complications) according to the prognosis. The VE/VCO2 slope of the observation group and the control group were compared, and the clinical data of the observation group and the control group were compared, and the influencing factors of postoperative cardiovascular complications in patients with pulmonary lobectomy were analyzed, and the predictive value of VE/VCO2 slope for postoperative cardiovascular complications in patients with pulmonary lobectomy was analyzed.

Results

31 patients in the observation group, 7 cases cardiovascular complications, 4 cases pulmonary embolism, 15 cases arrhythmia, 16 cases hypotension, 2 cases heart failure and 1 case required cardiopulmonary resuscitation; After surgery 30 d, 1 case each died in the observation and control groups.There were 14 patients re-admitted to ICU in the control group and 18 in the observation group (10.14% vs.58.06%, χ2=37.869, P=0.000). The length of hospitalization [8.0 (6.5, 13.0) vs. 6.0 (5.0, 7.0), P=0.000] and the duration of ICU stay [5.0(3.0, 8.0) vs. 2.0 (2.0, 3.0), P=0.000] in the observation group were both significantly longer than that in the control group. In addition, VCO2, VE and PETCO2 at resting state, as well as VCO2 and PETCO2 at peak exercise were significantly decreased in observation group, and the slope of VE/VCO2 was significantly increased (P<0.05). Univariate and multivariate logistic regression showed that VE/VCO2 slope was associated with cardiovascular complications (OR=1.074;95%CI:1.004~1.149; P=0.039) correlation. The sensitivity, specificity and AUC of VE/VCO2 slope in predicting postoperative cardiovascular complications in lobectomy patients were 78.13%, 89.66% and 0.893, respectively. VE/VCO2 were significantly correlated with length of stay in ICU (b = 0.31, F= 19.123, t = 3.066, P = 0.003).

Conclusion

VE/VCO2 slope can be used to predict postoperative cardiovascular complications in patients with pulmonary lobectomy, and it has high predictive value.

Key words: Bronchogenic carcinoma, Predictive value, Cardiovascular complications, Carbon dioxide ventilation equivalent, Thoracoscopic lobectomy

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