1.Efficacy and safety of single-, two-, and three-port video-assisted thoracoscopic surgery for spontaneous pneumothorax: A systematic review and meta-analysis
Weirun MIN ; Wei CAO ; Haochi LI ; Jinlong ZHANG ; Xinchun DONG ; Xindong LUO ; Shengliang HE ; Yunjiu GOU
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2026;33(03):461-467
Objective To systematically evaluate the efficacy and safety of video-assisted thoracoscopic surgery (VATS) with different numbers of ports in the treatment of spontaneous pneumothorax. Methods We conducted a comprehensive search of CNKI, PubMed, The Cochrane Library, Web of Science, EMbase, Wanfang Data, and the Chinese Medical Journal Full-text Database for clinical controlled trials on VATS with different port numbers for spontaneous pneumothorax, from their inception to March 2023. Two researchers independently screened the literature and assessed its quality.The Newcastle-Ottawa Scale (NOS) was used to assess the methodological quality of cohort and case-control studies, and the Cochrane risk-of-bias tool was used to evaluate randomized controlled trials (RCT). Meta-analysis was performed using RevMan 5.4.1 software. Results A total of 107 studies were included, comprising 35 RCT, 2 cohort studies, and 70 case-control studies. All cohort and case-control studies included in the analysis had NOS scores≥7. The meta-analysis revealed that compared to two-port VATS (2P-VATS) and three-port VATS (3P-VATS), single-port thoracoscopic surgery (SPTS) was associated with less intraoperative blood loss (SMD=–1.58, 95%CI: –1.93 to –1.22, P<0.001; and SMD=–1.59, 95%CI: –2.03 to –1.14, P<0.001, respectively), shorter postoperative hospital stay (SMD=–1.05, 95%CI: –1.29 to –0.82, P<0.001; and SMD=–1.08, 95%CI: –1.39 to –0.77, P<0.001), shorter duration of postoperative chest tube drainage (SMD=–0.75, 95%CI: –1.00 to –0.50, P<0.001; and SMD=–1.23, 95%CI: –1.72 to –0.75, P<0.001), fewer postoperative complications (OR=0.34, 95%CI: 0.26 to 0.45, P<0.001; and OR=0.47, 95%CI: 0.33 to 0.68, P<0.001), and lower pain scores at 24, 48, and 72 hours after surgery (P<0.05). The operative time for SPTS was shorter than that for 2P-VATS (SMD=–0.53, 95%CI: –0.90 to –0.16, P=0.005) but showed no significant difference compared to 3P-VATS (P=0.21). When comparing 2P-VATS with 3P-VATS, 2P-VATS demonstrated less intraoperative blood loss (SMD=–1.02, 95%CI: –1.81 to –0.22, P=0.01), shorter postoperative hospital stay (SMD=–0.59, 95%CI: –1.11 to –0.06, P=0.03), shorter duration of chest tube drainage (SMD=–0.46, 95%CI: –0.85 to –0.08, P=0.02), fewer postoperative complications (OR=0.36, 95%CI: 0.22 to 0.59, P<0.001), and lower pain scores at 24, 48, and 72 hours after surgery (P≤0.05). Conclusion Both SPTS and 2P-VATS are effective and safe surgical options for spontaneous pneumothorax, deserving further promotion and application in clinical practice. However, due to limitations in the quantity and quality of the included studies, more large-sample, high-quality research is needed to validate these findings.
2.Relationship between gender and efficacy of immune checkpoint inhibitors for esophageal cancer patients: A systematic review and meta-analysis
Jinlong ZHANG ; Haochi LI ; Zhaohao LIN ; Wei CAO ; Weirun MIN ; Xindong LUO ; Xinchun DONG ; Yunjiu GOU
Chinese Journal of Clinical Thoracic and Cardiovascular Surgery 2026;33(04):639-645
Objective To systematically evaluate the efficacy of immune checkpoint inhibitors (ICIs) in treating esophageal cancer patients of different genders. Methods Computer searches were conducted on PubMed, Cochrane Library, and Embase databases to collect randomized controlled trial (RCT) on ICIs treatment for esophageal cancer patients from the establishment of the databases to January 25, 2024. Two researchers independently screened the literature and extracted data according to the inclusion and exclusion criteria. The outcome indicators were overall survival (OS) and progression-free survival (PFS), and RevMan 5.4 software was used for meta-analysis. The modified Jadad scoring scale was used to evaluate the quality of the included literature. Results A total of 10 RCT involving 5364 esophageal cancer patients were included in this study, with 2684 patients in the trial group and 2680 patients in the control group. The Jadad scores of the included literature were all ≥6 points, indicating high-quality RCT. Meta-analysis results showed that female esophageal cancer patients receiving ICIs treatment [HR=0.72, 95%CI (0.59, 0.87), P<0.001] had a more significant median OS prolongation than male patients [HR=0.73, 95%CI (0.68, 0.78), P<0.001]; while male patients [HR=0.57, 95%CI (0.52, 0.64), P<0.001] had a more significant PFS prolongation than female patients [HR=0.72, 95%CI (0.55, 0.94), P=0.01]. Female patients treated with ICIs alone [HR=0.66, 95%CI (0.50, 0.87), P=0.003] had a more significant median OS prolongation than male patients [HR=0.79, 95%CI (0.72, 0.87), P<0.001]; while male patients receiving ICIs combined with chemotherapy [HR=0.67, 95%CI (0.61, 0.74), P<0.001] had a more significant median OS prolongation than female patients [HR=0.77, 95%CI (0.59, 1.01), P=0.06]. Conclusion Female patients receiving ICIs have a slight advantage in OS compared to male patients, while male patients have an advantage in PFS. Male patients receiving ICIs combined with chemotherapy have better survival benefits than female patients, while female patients using ICIs monotherapy have better survival benefits than male patients.
3.Clinical Study on the Effect of Hongqi Shenmai Drink on Regulating Secretory Phosphoprotein 1 to Improve Heart Failure after Myocardial Infarction of Qi-Yin Deficiency and Blood Stasis Type
Haohao BO ; Chengbo ZHANG ; Chenhan MAO ; Rui YIN ; Meng ZHANG ; Xuemei SUN ; Yansong LI ; Xindong WANG
Journal of Nanjing University of Traditional Chinese Medicine 2025;41(12):1734-1741
OBJECTIVE To study the therapeutic effect of Hongqi Shenmai Drink on heart failure(HF)after acute myocardial in-farction(AMI)with qi-yin deficiency and blood stasis,and its regulatory effect on serum secretory phosphoprotein 1(SPP1)in AMI-HF patients.METHODS Seventy-six patients with AMI-HF of qi-yin deficiency and blood stasis type were enrolled in this study from three centers:Affiliated Hospital of Integrated Traditional and Western Medicine,Nanjing University of Chinese Medicine;Hangzhou Xiaoshan Hospital of Traditional Chinese Medicine;and Changzhou Hospital of Traditional Chinese Medicine.They were randomly di-vided into a traditional Chinese medicine(TCM)group and a control group,with 38 patients in each group.During the treatment period,4 patients in the TCM group and 3 patients in the control group dropped out.The control group received conventional Guideline-directed medical therapy(GDMT),while the TCM group received GDMT plus Hongqi Shenmai Drink.The treatment course for both groups was 12 weeks.The TCM syndrome scores of the two groups of patients were compared before and after treatment,and the clini-cal efficacy and readmission rate were assessed.Echocardiography was used to assess cardiac structure and function.ELISA was used to detect changes in serum SPP1,N-terminal pro-brain natriuretic peptide(NT-proBNP),interleukin-1β(IL-1β),type Ⅰ collagen α1(COL1α1),and matrix metalloproteinase 9(MMP9)levels.The 6-minute walk test(6MWT)was used to assess exercise tolerance,and the Minnesota living with heart failure questionnaire(MLHFQ)was used to assess patients'quality of life.Adverse reactions were monitored in both groups during treatment.RESULTS After treatment,the TCM syndrome scores of both groups decreased signifi-cantly(P<0.01),with the TCM group showing a significantly lower score than the control group(P<0.01).The total effective rate of TCM clinical efficacy in the TCM group was superior to that in the control group(P<0.05),and the readmission rate in the TCM group was significantly lower than that in the control group(P<0.01).Left ventricular end diastolic diameter(LVEDD),left ventricular end-systolic diameter(LVESD),left ventricular ejection fraction(LVEF),6MWT,and MLHFQ scores improved in both groups(P<0.01),with the TCM group showing superior improvement compared to the control group(P<0.05,P<0.01).Serum levels of NT-proBNP,IL-1β,COL1α1,and MMP9 decreased in both groups(P<0.05,P<0.01).Serum SPP1 levels were significantly decreased in the TCM group(P<0.01),and serum levels of NT-proBNP,IL-1β,COL1α1,and MMP9 in the TCM group were significantly lower than those in the con-trol group(P<0.01).The change in SPP1(ΔSPP1)showed a negative correlation with the change in the cardiac function ΔLVEF(r=-0.42,P<0.01),and a positive correlation with the myocardial fibrosis marker ΔCOL1α1(r=0.58,P<0.01)and the matrix degradation marker ΔMMP9(r=0.51,P<0.01).There was no significant difference in adverse reaction rates between the two groups during treat-ment(P>0.05).CONCLUSION Hongqi Shenmai Drink combined with GDMT can effectively improve clinical symptoms and cardiac function in patients with AMI-HF of qi-yin deficiency and blood stasis type,with good safety.Its mechanism may be related to the in-hibition of SPP1-mediated inflammation-fibrosis pathway and the downregulation of IL-1β,COL1α1,and MMP9 expression.
4.Clinical Study on the Effect of Hongqi Shenmai Drink on Regulating Secretory Phosphoprotein 1 to Improve Heart Failure after Myocardial Infarction of Qi-Yin Deficiency and Blood Stasis Type
Haohao BO ; Chengbo ZHANG ; Chenhan MAO ; Rui YIN ; Meng ZHANG ; Xuemei SUN ; Yansong LI ; Xindong WANG
Journal of Nanjing University of Traditional Chinese Medicine 2025;41(12):1734-1741
OBJECTIVE To study the therapeutic effect of Hongqi Shenmai Drink on heart failure(HF)after acute myocardial in-farction(AMI)with qi-yin deficiency and blood stasis,and its regulatory effect on serum secretory phosphoprotein 1(SPP1)in AMI-HF patients.METHODS Seventy-six patients with AMI-HF of qi-yin deficiency and blood stasis type were enrolled in this study from three centers:Affiliated Hospital of Integrated Traditional and Western Medicine,Nanjing University of Chinese Medicine;Hangzhou Xiaoshan Hospital of Traditional Chinese Medicine;and Changzhou Hospital of Traditional Chinese Medicine.They were randomly di-vided into a traditional Chinese medicine(TCM)group and a control group,with 38 patients in each group.During the treatment period,4 patients in the TCM group and 3 patients in the control group dropped out.The control group received conventional Guideline-directed medical therapy(GDMT),while the TCM group received GDMT plus Hongqi Shenmai Drink.The treatment course for both groups was 12 weeks.The TCM syndrome scores of the two groups of patients were compared before and after treatment,and the clini-cal efficacy and readmission rate were assessed.Echocardiography was used to assess cardiac structure and function.ELISA was used to detect changes in serum SPP1,N-terminal pro-brain natriuretic peptide(NT-proBNP),interleukin-1β(IL-1β),type Ⅰ collagen α1(COL1α1),and matrix metalloproteinase 9(MMP9)levels.The 6-minute walk test(6MWT)was used to assess exercise tolerance,and the Minnesota living with heart failure questionnaire(MLHFQ)was used to assess patients'quality of life.Adverse reactions were monitored in both groups during treatment.RESULTS After treatment,the TCM syndrome scores of both groups decreased signifi-cantly(P<0.01),with the TCM group showing a significantly lower score than the control group(P<0.01).The total effective rate of TCM clinical efficacy in the TCM group was superior to that in the control group(P<0.05),and the readmission rate in the TCM group was significantly lower than that in the control group(P<0.01).Left ventricular end diastolic diameter(LVEDD),left ventricular end-systolic diameter(LVESD),left ventricular ejection fraction(LVEF),6MWT,and MLHFQ scores improved in both groups(P<0.01),with the TCM group showing superior improvement compared to the control group(P<0.05,P<0.01).Serum levels of NT-proBNP,IL-1β,COL1α1,and MMP9 decreased in both groups(P<0.05,P<0.01).Serum SPP1 levels were significantly decreased in the TCM group(P<0.01),and serum levels of NT-proBNP,IL-1β,COL1α1,and MMP9 in the TCM group were significantly lower than those in the con-trol group(P<0.01).The change in SPP1(ΔSPP1)showed a negative correlation with the change in the cardiac function ΔLVEF(r=-0.42,P<0.01),and a positive correlation with the myocardial fibrosis marker ΔCOL1α1(r=0.58,P<0.01)and the matrix degradation marker ΔMMP9(r=0.51,P<0.01).There was no significant difference in adverse reaction rates between the two groups during treat-ment(P>0.05).CONCLUSION Hongqi Shenmai Drink combined with GDMT can effectively improve clinical symptoms and cardiac function in patients with AMI-HF of qi-yin deficiency and blood stasis type,with good safety.Its mechanism may be related to the in-hibition of SPP1-mediated inflammation-fibrosis pathway and the downregulation of IL-1β,COL1α1,and MMP9 expression.
5.Different Tendon Reconstruction Techniques for Repairing Medial Meniscus Posterior Root Tears:A Biomechanical Study
Yian SUN ; Zhou ZHANG ; Qiang ZHAO ; Xindong ZHAO ; Ming ZHOU ; Liao SONG ; Fei TENG ; Daijun XIE ; Xu LI ; Meng WU ; Jin JIANG
Journal of Medical Biomechanics 2025;40(3):719-725
Objective Through in vitro experiments,biomechanical data of the transtibial pullout suture(TPS),tendon reconstruction(TR),and tendon reconstruction with suture augmentation(TRS)were collected,so as to evaluate the biomechanical effectiveness of tendon reconstruction for repairing medial meniscus posterior root tear(MMPRT).Methods Eighteen porcine knee joint models were divided into TPS,TR,and TRS groups.Sutures were used to fix the meniscal root in TPS group.Tendons were passed through an incision at the meniscal root in TR group.Tendons were passed through an incision at the meniscal root and secured at tendon-meniscus contact area with additional sutures in TRS group.The sutures and tendons were pulled out through tibial tunnels and fixed at the anteromedial tibia.All groups underwent failure load tests,and ultimate failure load,displacement at failure load,load at clinical failure,stiffness,and failure modes of the samples were recorded.Results The maximum failure load in TPS group was significantly higher than that in TR group(P<0.05),but there was no significant difference between TPS group and TRS group(P>0.05).The maximum failure load in TRS group was significantly higher than that in TR group(P<0.05).The displacement under failure load in TR group and TRS group was significantly lower than that in TPS group(P<0.05),but there was no significant difference between TR group and TRS group(P>0.05).There were no significant differences in the load under clinical failure among the 3 groups(P>0.05).The stiffness of TRS group was significantly greater than that of TPS group(P<0.05),but no significant difference was observed between TR group and TPS group,as well as between TR group and TRS group(P>0.05).All failures were caused by suture or tendon cutting through the meniscus.Conclusions The tendon reconstruction techniques is superior to the TPS in terms of failure displacement and stiffness,while the TRS further enhances the stability of the repair.
6.Different Tendon Reconstruction Techniques for Repairing Medial Meniscus Posterior Root Tears:A Biomechanical Study
Yian SUN ; Zhou ZHANG ; Qiang ZHAO ; Xindong ZHAO ; Ming ZHOU ; Liao SONG ; Fei TENG ; Daijun XIE ; Xu LI ; Meng WU ; Jin JIANG
Journal of Medical Biomechanics 2025;40(3):719-725
Objective Through in vitro experiments,biomechanical data of the transtibial pullout suture(TPS),tendon reconstruction(TR),and tendon reconstruction with suture augmentation(TRS)were collected,so as to evaluate the biomechanical effectiveness of tendon reconstruction for repairing medial meniscus posterior root tear(MMPRT).Methods Eighteen porcine knee joint models were divided into TPS,TR,and TRS groups.Sutures were used to fix the meniscal root in TPS group.Tendons were passed through an incision at the meniscal root in TR group.Tendons were passed through an incision at the meniscal root and secured at tendon-meniscus contact area with additional sutures in TRS group.The sutures and tendons were pulled out through tibial tunnels and fixed at the anteromedial tibia.All groups underwent failure load tests,and ultimate failure load,displacement at failure load,load at clinical failure,stiffness,and failure modes of the samples were recorded.Results The maximum failure load in TPS group was significantly higher than that in TR group(P<0.05),but there was no significant difference between TPS group and TRS group(P>0.05).The maximum failure load in TRS group was significantly higher than that in TR group(P<0.05).The displacement under failure load in TR group and TRS group was significantly lower than that in TPS group(P<0.05),but there was no significant difference between TR group and TRS group(P>0.05).There were no significant differences in the load under clinical failure among the 3 groups(P>0.05).The stiffness of TRS group was significantly greater than that of TPS group(P<0.05),but no significant difference was observed between TR group and TPS group,as well as between TR group and TRS group(P>0.05).All failures were caused by suture or tendon cutting through the meniscus.Conclusions The tendon reconstruction techniques is superior to the TPS in terms of failure displacement and stiffness,while the TRS further enhances the stability of the repair.
7.Progress in the application of absolute ethanol in interventional embolization treatment of peripheral arteriovenous malformations
Qianyun HAN ; Yuchen SHEN ; Deming WANG ; Lixin SU ; Xiao LI ; Xindong FAN
Journal of Interventional Radiology 2024;33(11):1244-1252
Arteriovenous malformations(AVMs)are a kind of high-flow vascular malformation.AVMs can be classified in many ways,including histo-embryological classification,hemodynamic classification,etc.At present,the two mainstream classification systems used to guide the embolization treatment of peripheral AVMs are proposed by Cho and Yakes respectively based on the angiographic morphology of the lesions.Interventional embolization is the first-line treatment for AVMs.Among the many embolization agents,absolute ethanol is a permanent liquid embolization agent.Absolute ethanol can directly destroy the vascular endothelial cells to achieve a good curative efficacy,therefore,it has been wildly used in the treatment of peripheral AVMs.Yakes classification combines the angiographic classification with absolute ethanol embolization therapy.During absolute ethanol treatment,close attention should be paid to the occurrence of complications such as elevated pulmonary artery pressure.Although there are challenges remaining in the treatment of AVMs,the rapid development of molecular genetics has made targeted drug adjunctive treatment for AVMs possible.Perhaps,the novel therapeutic mode of combination use of traditional therapy targeted drug may be able to make a breakthrough in the treatment of AVMs.
8.Establishment of a concise health index synthetic evaluation method for adolescents
XU Huiqiong, ZHANG Xinyu, LI Xiaoheng, CHEN Dingyan, ZHANG Xindong, WANG Xi, WAN Yuhui, TAO Fangbiao
Chinese Journal of School Health 2023;44(5):706-710
Objective:
The aim of this study was to establish a comprehensive concise health index (CHI) for evaluating adolescents, so as to provide a basis for determining the overall health status of adolescents in China.
Methods:
On the basis of a literature review and consensus among core researchers, adolescent CHI indicators in the following five dimensions were assessed:physical growth, physical fitness, common diseases, mental health and behavioral health. A total of 24 experts used an analysis hierarcgy process (AHP) to calculate the indicators subjective weights. In addition, from October to December of 2021, two regions, A and B were selected to conduct empirical research, and the CRITIC method was used to calculate the objective weights of the indicators. Finally, the weight coefficients were determined through the AHP-CRITIC combination weight method, and comprehensive evaluation was performed with the TOPSIS method.
Results:
Across academic period and genders, the combined weighted coefficients of the health indicators were as follows:BMI, 0.081-0.095; waist circumference, 0.070-0.081; relative grip strength, 0.101-0.108; myopia, 0.110-0.128; dental caries, 0.055-0.070; psychological symptoms, 0.240-0.262; physical exercise, 0.085-0.115; screen time, 0.097-0.111; and sleep duration, 0.086-0.103. The health index of middle school students in city A (0.626±0.065) was significantly higher than that in city B(0.613±0.066)( t=6.34, P <0.01).
Conclusion
The comprehensive adolescent CHI evaluation method has good consistency and application value, and may serve as a reference for adolescent health monitoring.
9.Clinical characteristics and risk factors of neonatal adrenal hemorrhage
Hao CHEN ; Yin′ai LI ; Jianhua FU ; Xindong XUE
International Journal of Pediatrics 2022;49(1):63-67
Objective:To explore the clinical characteristics and risk factors of neonatal adrenal hemorrhage(NAH), and to improve the understanding, diagnosis and treatment of this disease.Methods:In this study, a retrospective nested case-control study was used to collect clinical data of neonates diagnosed with NAH from January 2011 to December 2021 in the Department of Neonatology, Shengjing Hospital of China Medical University, and telephone follow-up were conducted for them.NAH infants with manifestations of neonatal hyperbilirubinemia were selected as the case group, and the random number table method was used to select the neonatal hyperbilirubinemia infants with NAH excluded by imaging in the same period at a ratio of 1: 2 as the control group.Characteristics of the clinical data of the two groups were compared and analyzed by Logistic regression to explore the risk factors of NAH.Results:During the study period, a total of 31 cases of NAH were diagnosed, with an average gestational age of(37.6±2.2) weeks, including 19 males, 25 full-term infants, 6 cases with macrosomia, 30 cases with natural labor, 29 cases with hyperbilirubinemia, 8 cases with birth injury, 7 cases with asphyxia, 9 cases with bilirubin encephalopathy, 12 cases with sepsis, 13 cases with intracranial hemorrhage, 17 cases with anemia, 9 cases with respiratory disease, 5 cases with hyperkalemia, 6 cases with hyponatremia.The results of NAH ultrasonography showed that 8 cases of hematoma had medium and low echoes, 6 cases of mixed echoes, and 17 cases of liquid flocculent echoes with or without punctate echoes.Color Doppler flow imaging results showed no blood flow signal.There were 26 cases on the right side, 4 cases on the left side, and 1 case on both sides.A total of 26 cases were followed up.Ultrasonography showed that most haematomas were absorbed within 1 to 3 months and disappeared within 6 months.Twenty-nine cases were included in the case group and 58 cases in the control group.Univariate analysis showed that age, birth weight, macrosomia, mode of delivery, bilirubin encephalopathy, neonatal sepsis, abdominal distension, anemia, asphyxia, total bilirubin, indirect bilirubin, Hb and CRP were significantly higher than those in the control group( P<0.05). Multivariate logistic regression analysis showed that macrosomia( OR=7.415, 95% CI=1.342~40.956, P=0.022) and asphyxia( OR=12.075, 95% CI=1.293~112.736, P=0.029) were independent risk factors of NAH. Conclusion:NAH is common in naturally born full-term infants, with a lack of specific clinical manifestations.Unexplained persistent hyperbilirubinemia may be its first symptom, often accompanied by anemia and ion disturbance.A few infants may have adrenal insufficiency.Macrosomia and asphyxia may be the risk factors for the occurrence of NAH.
10.Clinical characteristics of coronavirus disease 2019 infected with Delta variant in Guangzhou:A real-world study
Danwen ZHENG ; Heng WENG ; Yuntao LIU ; Xin YIN ; Jun ZHANG ; Jian ZHANG ; Luming CHEN ; Yuanshen ZHOU ; Jing ZENG ; Yan CAI ; Wanxin WEN ; Qinghua ZHANG ; Lanting TAO ; Liangsheng SUN ; Tianjin CAI ; Weiliang WANG ; Shubin CAI ; Xindong QIN ; Xiaofeng LIN ; Xiaohua XU ; Haimei ZOU ; Qiaoli HUA ; Peipei LU ; Jingnan LIN ; Kaiyuan ZHANG ; Aihua OU ; Jiqiang LI ; Fang YAN ; Xu ZOU ; Lin LIN ; Banghan DING ; Jianwen GUO ; Tiehe QIN ; Yimin LI ; Xiangdong GUAN ; Xiaoneng MO ; Zhongde ZHANG
Chinese Journal of Emergency Medicine 2021;30(10):1220-1228
Objective:To summarize the clinical characteristics of patients with coronavirus disease 2019 (COVID-19) infected with Delta variant, so as to provide further references for clinical diagnosis and treatment.Methods:A real-world study was conducted to analyze the characteristics of 166 COVID-19 patients infected with Delta variant at Guangzhou Eighth People’s Hospital, Guangzhou Medical University.Results:The study enrolled 5 asymptomatic cases, 123 non-severe cases (mild and moderate type), and 38 severe cases (severe and critical type). Among these patients, 69 (41.6%) were male and 97 (58.4%) were female, with a mean age of 47.0±23.5 years. Thirty-nine cases (23.5%) had received 1 or 2 doses of inactivated vaccine. The incidence of severe COVID-19 cases was 7.7% in 2-doses vaccinated patients, which was lower than that of 11.5% in 1-dose and 26.8% in unvaccinated patients. The proportion of severe cases in 2 dose-vaccinated patients was 7.7%, which was lower than that of 11.5% in 1-dose vaccinated patients and 26.8% in unvaccinated patients, but the difference was not significant ( P>0.05). The most common clinical symptom was fever (134 cases, 83.2%), and 39.1% of cases presented with high-grade fever (≥39 °C); other symptoms were cough, sputum, fatigue, and xerostomia. The proportion of fever in severe cases was significantly higher than that of non-severe cases (97.4% vs. 76.4%, P<0.01). Similarly, the proportion of severe cases with high peak temperature (≥39 ℃) () was also higher than that of non-severe cases (65.8% vs. 30.9%, P<0.01). The median minimal Cycle threshold (Ct) values of viral nucleic acid N gene and ORFlab gene were 20.3 and 21.5, respectively, and the minimum Ct values were 11.9 and 13.5, respectively. Within 48 h of admission, 9.0% of cases presented with decreased white blood cell counts, and 52.4% with decreased lymphocyte counts. The proportions of increased C-reactive protein, serum amyloid A, interleukin 6, and interleukin 10 were 32.5%, 57.4%, 65.3%, and 35.7%, respectively. The proportions of elevated C-reactive protein, serum amyloid A and interleukin-6 in severe cases were significantly higher than those in non-severe cases ( P<0.01). Logistic regression analysis showed that older age and higher peak temperature were associated with a higher likelihood of severe cases ( OR>3, 95% CI: 2-7, P<0.01). In terms of treatment, traditional Chinese medicine (TCM) was used in 97.6% of non-severe cases and 100% in severe cases. Other treatments included respiratory and nutritional support, immunotherapy (such as neutralizing antibodies and plasma of recovered patients). The median times from admission to progression to severe cases, of fever clearance, and of nucleic acid conversion were 5 days, 6 days and 19 days, respectively. No deaths were reported within 28 days. Conclusions:The symptoms of Delta variant infection in Guangzhou are characterized by a high proportion of fever, high peak temperature, long duration of fever, high viral load, a long time to nucleic acid conversion, and a high incidence of severe cases. The severe cases exhibit a higher percentage of elderly patients, a longer duration of fever and have a higher fever rate and a higher hyperthermia rate than non-severe cases. Age and hyperthermia are independent risk factors for progression to severe disease. The combination of TCM and Western medicine can control the progression of the disease effectively.


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