ObjectivesTo analyze the application value of 6-minute walking test (6MWT) in the clinical evaluation of chronic heart failure (CHF).MethodsPubMed, EMbase, The Cochrane Library, CBM, VIP, WanFang Data and CNKI databases were searched online to collect randomized controlled trials (RCTs) of 6-minute walking distance (6MWD) as the CHF evaluation index. Two reviewers independently screened literature, extracted data, and then analyzed data by using SPSS 17.0 statistical software. The 6MWD with symptom, quality of life, exercise tolerance (ETT), left ventricular ejection fraction (LVEF), peak oxygen consumption (pVO2) were analyzed by Kappa consistency test, and the possible influencing factors of 6MWD were analyzed by logistic regression.ResultsA total of 158 RCTs involving 17 853 patients were included. The results of statistical analysis showed that: 6MWD was consistent with the improvement of symptoms, quality of life, ETT, LVEF and pVO2 (Kappa>0.4). Baseline 6MWD (OR=2.91, 95%CI 1.278 to 6.634,P=0.011) and NYHA Ⅲ-Ⅳ ratio (OR=2.59, 95%CI 1.091 to 6.138, P=0.031) were the independent influencing factors for 6MWD improvement separately.ConclusionsThe 6MWT is an objective and reliable indicator of CHF evaluation.
Objective To analyze the effects of different surgical methods on postoperative pulmonary function and exercise capacity in patients with non-small cell lung cancer (NSCLC), so as to explore whether it can effectively improve pulmonary function and promote the recovery of exercise capacity by reducing the number of trocars ports and the resection of normal lung tissues. Methods The clinical data of NSCLC patients who underwent surgery in the First Affiliated Hospital of Hebei North University from January 2016 to June 2019 were collected retrospectively. According to the surgical methods, they were divided into three groups: single utility port video-assisted thoracic surgery (SP-VATS) segmentectomy group, SP-VATS lobectomy group and three port video-assisted thoracic surgery (TP-VATS) lobectomy group. The changes of pulmonary function [forced vital capacity (FVC), forced expiratory volume in one second (FEV1), peak expiratory flow (PEF), maximal voluntary ventilation (MVV)] and 6-minute walking distance (6MWD) at different time points [1st day before the operation (T0); 3rd day (T1), 7th day (T2), 1st month (T3), 3rd month (T4), 6th month (T5) and 1st year (T6) after the operation] were compared among the three groups. Results A total of 342 patients were included, including 102 in SP-VATS segmentectomy group, 116 in SP-VATS lobectomy group and 124 in TP-VATS lobectomy group. Except for pathological type and TNM stage (P<0.05), there was no significant difference in general information, preoperative pulmonary function or 6MWD among the three groups (P>0.05). The pulmonary function and 6MWD of the three groups before and after operation were not affected by pathological type or TNM stage (P>0.05). Except at T6 time point (P>0.05), there were significant differences in postoperative pulmonary function and 6MWD among the three groups at T1-T5 time points (P<0.05). Intra group comparison of pulmonary function and 6MWD in the three groups showed that the operation had the least impact on patients in SP-VATS segmentectomy group with the fastest recovery, followed by SP-VATS lobectomy group, and SP-VATS lobectomy group was the worst. Conclusions Video-assisted thoracoscopic for NSCLC can improve pulmonary function and promote the recovery of exercise capacity by reducing the number of trocars ports and the resection of normal lung tissues. However, this advantage is mainly reflected in the early postoperative stage.