Objectives:To evaluate lung injury mechanism in SD rat with nitrogen dioxide(NO2) exposure. 　Methods:In the test-control study, pulmonary malondialdehyde(MDA),glutathione(GSH) and total-antioxidant content(T-AOC) were determined in 10 SD rats with long-term NO2 exposure,10 SD rats with short-term NO2 exposure and 10 SD rats with fresh air as control. 　Results: Pulmonary MDA content was increased and T-AOC was decreased significantly in SD rat exposed to NO2. Pulmonary GSH was decreased significantly in long-term NO2 exposure group as compared with short-term NO2 exposure group and control group. 　Conclusions: Imbalance between oxidant and antioxidant was an important mechanism in the pathogenesis of oxidizing lung injury in SD rat with NO2 exposure.

Objective:To investigate the clinical efficacy of levodopa combined comprehensive therapy on the children with ametropic amblyopia.Methods:One hundred three patients (180 eyes) with ametropic amblyopia admitted into our hospital from April 2013 to March 2016 were randomly divided into the control group and the study group.Fifty-two patients (90 eyes) in the control group were treated with comprehensive therapy,and fifty-one patients (90 eyes) in study group were treated with levodopa combined comprehensive therapy.After six months of treatment,the treatment efficacy,pattern visual evoked potential (P-VEP),visual sensitivity,and visual function of patients were observed and compared between the two groups,and the adverse reaction were recorded and compared.Results:At six months after treatment,the effective rate of study group was 90.00％,which was significantly higher than that of control group (68.89％,P＜0.05).The wave amplitude ofP-VEP Pl00 of both groups showed a remarkable increase,which was much higher in the study group (P＜0.05);the incubation period in both groups were obviously decreased,while they were markedly lower in the study group (P＜0.05).The visual acuity under 100％,25％,10％ and 5％ of spatial frequency were conspicuously higher than those of control group (P＜0.05).And correction convergence range,and correction separation range in study group were much higher than those of control group,and corrected near stereo vision was markedly lower than that of control group (P＜0.05).Additionally,no significant difference was found in the incidence of adverse reactions between the two groups (P＞0.05).Conclusion:Levodopa combined comprehensive therapy had a good ability of improving function of visual central neurons,visual acuity and binocular stereo vision functions.

Objectives: To identify any craniofacial morphological changes induced by a mandibular-repositioning oral appliance (MRA) and to explore the possibility of predicting the treatment response to MRA by cephalometric analysis in patients with obstructive sleep apnea (OSA). Methods: Seventy OSA patients [male/female: 63/7; age: (50.5±11.6) years; BMI: (27.6±4.6) kg/m2; AI: (34.9±21.3) episodes/hour; and oxygen saturation nadir: (66.3±16.5) %] were enrolled. MRA was fabricated individually for each patient after the consultation by a dentist. Polysomnographic (PSG) examination was repeated with MRA in place 3 months after the initiation of the MRA therapy. For cephalometric analysis, a pair of cephalograms of each patient was obtained, one with and another without MRA. Results and Conclusions: After 3 months' treatment, AI was (156±19.2) episodes/hour, significantly reduced compared with the pre-treatment average AI (34.9±21.3 episodes/hour,P<0.000 1). Oxygen saturation nadir improved from (66.3±16.5)% (pre-treatment) to (74.1±15.5)% (with MRA) (P<0.001). A reduction of AI≥50% was achieved in 42 patients. Insertion of MRA led to anterior shift of the mandible, increase in upper airway width and area and decrease in upper airway length. Those with evident retrognathia and longer anterior upper facial height were more likely to benefit from the MRA management.

Objective:To investigate the cardiac presentations and the possible influencing factors of severe and critical coronavirus disease 2019 (COVID-19).Methods:A retrospective study was conducted. Patients with severe and critical COVID-19 admitted to the Eighth People's Hospital of Guangzhou from January 21st to February 24th 2020 were enrolled. According to the clinical classification, the patients were divided into severe group and critical group. The myocardial injury markers, such as lactate dehydrogenase (LDH), aspartate aminotransferase (AST), creatine kinase (CK), cardiac troponin I (cTnI), myoglobin (MYO), MB isoenzyme of creatine kinase (CK-MB), B-type natriuretic peptide (BNP) and electrocardiogram (ECG) changes were compared between the two groups.Results:A total of 55 COVID-19 patients were selected, including 15 critical cases and 40 severe cases. The patients with severe and critical COVID-19 were male-dominated (61.8%), the average age was (61.2±13.0) years old, 83.6% (46 cases) of them had contact history of Hubei, 38.2% (21 cases) of them were complicated with hypertension. There was no significant difference in baseline data between the critical group and the severe group. Myocardial injury markers of critical and severe COVID-19 patients were increased in different proportion, LDH increased in most patients (20 severe cases and 7 critical cases), followed by AST (16 severe cases and 5 critical cases). There was significant difference in the number of patients with elevated CK between severe group and critical group (cases: 1 vs. 4, P = 0.027). Abnormal ECG was found in 39 of 42 patients with ECG examination. Nonspecific change of T wave was the most common. Before and after treatment, 9 of 15 patients with changes of ECG and myocardial injury markers had oxygenation index less than 100 mmHg (1 mmHg = 0.133 kPa), and the prominent changes of ECG were heart rate increasing and ST-T change. Conclusions:The increase of myocardial injury markers and abnormal ECG were not specific to the myocardial injury of severe and critical COVID-19 patients. At the same time, the dynamic changes of myocardial injury markers and ECG could reflect the situation of myocardial damage.

Abstract: Objective To investigate the clinical features and risk factors for severe tsutsugamushi disease, so as to provide reference for diagnosis and differentiation of severe tsutsugamushi disease as soon as possible. Methods The clinical data of 178 cases of inpatients with tsutsugamushi disease admitted to the Guangzhou Eighth People's Hospital, Guangzhou Medical University from January 2016 to September 2021 were collected and analyzed according to their gender, age, underlying diseases, clinical characteristics at admission, laboratory examination results within 24 hours of admission and epidemiological history. The patients were divided into the severe group and the non-severe group according to the diagnostic criteria. The data of clinical characteristics, laboratory examination and prognosis of the two groups were compared. Multivariate logistic regression analysis was performed on the variables with statistical significance and the receiver operating characteristic curve (ROC) was drawn. Results A total of 178 patients were included in this study, with 37 in the severe group and 141 in the non-severe group. Compared with the non-severe group, the age of the severe group was older, the underlying diseases were more, the incidence of dyspnea and the levels of white blood cell, total bilirubin, aspartate aminotransferase, lactate dehydrogenase, cystatin C, uric acid and serum creatinine were significantly increased, the levels of platelet and albumin were significantly decreased (all P<0.05). The dyspnea [odds ratio (OR value)=8.93, 95% confidence interval (CI): 1.200-66.424; P=0.032], total bilirubin (OR=1.091, 95%CI: 1.028-1.159; P=0.004) and serum creatinine (OR=1.052, 95%CI: 1.004-1.102; P=0.033) were independent risk factors for severe tsutsugamushi disease. The area under ROC curve of total bilirubin and serum creatinine were 0.777 and 0.764, respectively (both P<0.01), indicating high predictive value for severe tsutsugamushi disease. The optimal cut-off value for total bilirubin was 23.01 µmol/L, with a sensitivity of 54.10% and a specificity of 90.60%; the optimal cut-off value for creatinine was 126.45 µmol/L, with a sensitivity of 43.20% and a specificity of 100.00%. The case fatality rate of severe tsutsugamushi disease was 2.70%. Conclusions The patients with severe tsutsugamushi disease are older, and have more underlying diseases. Dyspnea, increased total bilirubin and elevated serum creatinine are independent risk factors for severe tsutsugamushi disease, which can help in the early identification of severe tsutsugamushi disease early.

OBJECTIVETo study Chlamydia pneumoniae (C. pneumoniae) infection in 110 patients with respiratory tract infection admitted to our hospital from January to December 1995 in Nanjing.

METHODSSputum and throat swab specimens were taken and C. pneumoniae DNA was detected by using polymerase chain reaction (PCR) with the HM-1-HR-1 primer pair. At the same time, serum samples were taken and immunoglobulin G and M (IgG and IgM) fractions of antibodies to C. pneumoniae were studied by microimmunofluorescence test.

RESULTSPrevalence of specific IgG was 70% in patients with respiratory tract infection. Seventeen patients (15.5%) were serologically diagnosed as having recent C. pneumoniae infections and 12 patients (10.9%) had positive PCR in sputum and/or swab specimens. The total positive rate was 22.7% (25/110) detected by PCR combined with serological tests. Acute infection of C. pneumoniae was common in patients with asthma (57.1%), pneumonia (35.0%), COPD (25.9%) and bronchitis (25.0%). Clinical features between C. pneumoniae infection and non-C. pneumonia infection showed no significant differences.

CONCLUSIONSChlamydia pneumoniae is an important pathogen that causes infection of the human respiratory tract and attention should be drawn to this special illness.

Acute Disease ; Adolescent ; Adult ; Age Factors ; Aged ; Aged, 80 and over ; Antibodies, Bacterial ; blood ; Chlamydophila pneumoniae ; genetics ; immunology ; DNA, Bacterial ; analysis ; Female ; Humans ; Immunoglobulin G ; blood ; Male ; Middle Aged ; Pneumonia, Bacterial ; blood ; microbiology ; Polymerase Chain Reaction

Objective:To explore the clinical characteristics of imported malaria from Africa, and the correlation between blood lipids and disease severity.Methods:The clinical data of 172 imported malaria patients from Africa were collected from January 1, 2018 to January 31, 2021 in Guangzhou Eighth People′s Hospital, Guangzhou Medical University. The general conditions, clinical symptoms, laboratory tests, treatment and prognosis of the patients were analyzed retrospectively. The independent samples t-test, Mann-Whitney U test and binary multivariate logistic regression analysis were used for statistical analysis when appropriate. Results:A total of 172 patients were divided into 39 severe cases and 133 non-severe cases in this study. The main infection species was Plasmodium falciparum, with a total of 153 cases (89.0%), and the severe cases were all falciparum malarias. Compared with the non-severe group, the white blood cell count and triacylglycerol level were increased in the severe group.The differences were both statistically significant ( Z=2.397 and 4.368, respectively; both P<0.05). The hemoglobin, hematocrit, platelet count, high-density lipoprotein cholesterol, apolipoprotein A (ApoA)Ⅰ and ApoAⅠ/apolipoprotein B (ApoB) were significantly decreased in the severe group. The differences were all statistically significant ( Z=-4.473, -4.464, -4.750, -4.826, -5.488 and -4.419, respectively; all P<0.01). The total cholesterol and low-density lipoprotein cholesterol were also reduced in the severe group. The differences were both statistically significant ( t=3.817 and 5.285, respectively; both P<0.01). The area under receiver operator characteristic curve of high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triacylglycerol, ApoAⅠ, and ApoAⅠ/ApoB were 0.754, 0.727, 0.730, 0.789 and 0.733, respectively (all P<0.01). When the Youden index was at its maximum, the best cut-off value of ApoAⅠ was 0.535 g/L with sensitivity of the prediction for severe malaria of 79.5% and the specificity of 68.4%. ApoAⅠ had independent predictive value for severe malaria (odds ratio ( OR)=0.013, 95% confidence interval ( CI) 0.002 to 0.086, P<0.01), and stratified according to the best cut-off value, the risk of severe malaria when ApoA Ⅰ<0.535 g/L was 8.396 times of ApoA Ⅰ≥0.535 g/L ( OR=8.396, 95% CI 3.557 to 19.820, P<0.01). The case fatality rate of severe malaria was 2.6%(1/39). Conclusions:The imported malaria patients from Africa are mainly infected with Plasmodium falciparum and the case fatality rate of severe malaria is high. The high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triacylglycerol, ApoAⅠ, ApoAⅠ/ApoB of blood lipids show higher predictive value for severe malaria, among which, ApoAⅠ has independent predictive value for severe malaria. Changes in blood lipids will help to identify severe malaria as early as possible, improve the cure rate, and reduce the risk of death.

Objective:To analyze the epidemiological and clinical characteristics of patients with tsutsugamushi disease in Guangdong Province from 2016 to 2021, and to provide a reference for clinical diagnosis, treatment, scientific prevention and control of tsutsugamushi disease.Methods:A retrospective analysis was conducted to collect the information of patients with tsutsugamushi disease admitted to Guangzhou Eighth Hospital Affiliated to Guangzhou Medical University from 2016 to 2021, including the basic information, epidemiological characteristics, clinical manifestations, auxiliary examinations, complications, misdiagnosis at first diagnosis and treatment outcomes.Results:Among 155 patients with tsutsugamushi disease, there were 75 males (48.39%) and 80 females (51.61%), with an e age of (54.41 ± 13.78) years old, and 30 cases (19.35%) had other underlying diseases. The peak time of onset was from June to September. There were 97 local patients (62.58%) in Guangzhou, and 58 cases (37.42%) in other prefecture-level cities; 76.77% (119/155) had a history of field activities before the onset of the disease. 36.13% (56/155) were farmers. The most common clinical manifestations were fever (100.00%, 155/155), chills and/or shivering (77.42%, 120/155), headache and/or dizziness (74.19%, 115/155), fatigue (65.81%, 102/155), eschar or ulcer (92.90%, 144/155), and lymphadenopathy (49.68%, 77/155). The laboratory test results mainly showed a decrease in eosinophils (81.94%, 127/155), a decrease in hematocrit (78.71%, 122/155), a decrease in hemoglobin (52.26%, 81/155), a decrease in platelet count (50.97%, 79/155), a decrease in albumin (92.26%, 143/155), an increase in lactate dehydrogenase (90.32%, 140/155), an increase in adenosine deaminase (88.39%, 137/155), and an increase in alanine aminotransferase (85.16%, 132/155), elevated aspartate aminotransferase (85.16%, 132/155), and elevated procalcitonin (52.90%, 82/155); 30 cases (19.35%) were positive for the Weil-Felix Test. There were 95 cases (61.29%) with abnormal chest imaging results, and 34 cases (21.94%) with abnormal abdominal ultrasound or CT results. Common complications were toxic hepatitis, pulmonary infection, organ failure, and acute kidney injury, etc. The misdiagnosis rate of the initial diagnosis of this disease was 75.48% (117/155). Doxycycline and symptomatic and supportive therapy were given, 154 patients (99.35%) were cured or improved and discharged from hospital.Conclusions:Tsutsugamushi disease is prevalent in summer and autumn in Guangdong Province. Before the onset, most of the patients have a history of field activities. Farmers are susceptible people. Its clinical manifestations are diverse, and can affect multiple systems and organs. There are many complications, and doxycycline can be used for anti-infection treatment, with a high cure rate.

Objective    To investigate the preoperative localization of pulmonary glabrous nodules. Methods    A total of 192 patients admitted to General Hospital of  Northern Theater Command from April 2012 to September 2019 were selected for the study. There were 95 males and 97 females at an age of 56.47±11.79 years. All patients completed preoperative examination, and were divided into a positioning group (n=97) and a non-positioning group (n=95) according to whether the preoperative positioning was performed. And the surgical indicators between the two groups were compared. According to the substance of ground-glass opacity, they were divided into a pure ground-glass nodules group (n=23) and a mixed ground-glass nodules group (n=74) in the positioning group and a pure ground-glass nodules group (n=14) and a mixed ground-glass nodules group (n=81) in the non-positioning group . According to the size and distance of the nodules from the pleura and whether the nodules could be detected, the corresponding linear function was obtained. Results    The operative time of methylene blue localization group was shorter than that of the no localization group. In the scatter plot, the corresponding diameter and depth of the nodules and the corresponding coordinate points which can be explored were described. And linear regression was performed on all the coordinate points to obtain the linear function: depth=0.648×diameter–1.446 (mm). It can be used as an indication for the preoperative localization of pure ground-glass nodules in Da Vinci robotic surgery. Linear function: depth=0.559 5×diameter+0.56 (mm). It can be used as an indication of preoperative localization of mixed ground-glass nodules in Da Vinci robotic surgery. Conclusion    This equation can be used as a preoperative indication for clinical peripheral pulmonary ground-glass nodules.

BACKGROUND: Da Vinci robotic surgery system is widely used in department of thoracic surgery. The aim of this study is to investigate the treatment outcome of stage I non-small cell lung cancer (NSCLC) via da Vinci Surgical System. METHODS: Clinical date of 347 stage I NSCLC patients, who underwent lobectomy and systematic node dissection from Jan. 2012 to Dec. 2017, were reviewed. 134 patients underwent robot-assisted thoracic surgery (RATS) and 213 patients underwent video-assisted thoracic surgery (VATS). To compare perioperative outcome (blood lose, postoperative drainage, drainage time, postoperative hospital stay, number of the LN dissection) and analyze overall survival (OS), disease free survival (DFS) of the two groups and prognostic factors. RESULTS: The RATS group got less blood lose [(49±39 mL for RATS vs (202±239) mL for VATS, P<0.05] and postoperative drainage [Day 1: (248±123) mL for RATS vs (350±213) mL for VATS; Day 2: (288±189) mL for RATS vs (338±189) mL for VATS, P<0.05]. There were no significant difference for drainage time (10±5 for RATS vs 11±8 for VATS, P<0.05) and postoperative hospital stay (13±6 for RATS vs 14±9 for VATS, P<0.05) between the two groups. The RATS group harvested a more number of mean stations (5±2 for RATS vs 4±2 for VATS) and amounts (18±9 for RATS vs 11±8 for VATS) of the lymph nodes, P<0.05. There was no statistically significant difference of OS between RATS and VATS group [1-year OS: 97.3% vs 96%; 3-year OS: 89.8% vs 83.1%; 5-year OS: 87.5 % vs 70.3%; overall survival time (mean): 61 months vs 59 months, P>0.05]; corresponding there had a statistically significant difference of DFS between the two groups [1-year DFS: 93.7% vs 91.3%; 3-year DFS: 87.7% vs 68.4%; 5-year DFS: 87.7% vs 52.5%; disease free survival time (mean): 61 months vs 50 months, P<0.05]. The univariate analysis found that the amounts of the lymph nodes dissection was the prognostic factor for OS and tumor diameter, surgical approach, stations and amounts of the lymph nodes dissection were respectively the prognostic factors for DFS. However, multivariate analysis found that there was not independently factors for OS, but the tumor diameter and surgical approach were independently associated with DFS. CONCLUSIONS There was no significant difference about OS between the two groups, but the RATS got better DFS. RATS got more number of the LN dissection and less blood lose.
Adult ; Carcinoma, Non-Small-Cell Lung ; pathology ; surgery ; Disease-Free Survival ; Female ; Humans ; Lung Neoplasms ; pathology ; surgery ; Male ; Neoplasm Staging ; Retrospective Studies ; Robotics ; Thoracic Surgery, Video-Assisted