Objective:To investigate the occupational health status of electric welding workers and explore the effects of electric welding on hearing loss and respiratory damage.Methods:From August to December 2021, the cluster sampling method was used to select workers from an automobile manufacturer in Guangzhou City as research subjects: 636 welding workers in the welding workshop as the welding group, 757 assembly workers in the engine workshop and the final assembly workshop exposed to pure noise as the assembly group. Occupational disease hazard factors were detected for welding positions and assembly positions, and occupational health examination was carried out for research subjects. The occupational health status, the trends of hearing loss and respiratory abnormalities with working age were compared and analyzed between the two groups. Binary logistic regression was used to analyze the association between hearing loss and respiratory abnormalities in welding workers.Results:The excess rates of welding fumes, manganese and its compounds in the welding position were both 9.68% (3/31). Its noise exposure intensity [ (85.36±2.68) dB (A) ] and excess rate [48.39% (15/31) ] were not significantly different from those in the assembly position [ (84.86±3.28) dB (A) and 43.24% (16/37) ] ( P>0.05). The results of the occupational health examination showed that the detection rates of hearing loss, digital radiography (DR) chest X-ray abnormality, alanine aminotransferase abnormality, deazelaic aminotransferase abnormality and white blood cell count abnormality of workers in the welding group were higher than those in the assembly group ( P<0.05). The detection rates of hearing loss, DR chest X-ray abnormality, pulmonary ventilation abnormality in the welding group and the detection rate of hearing loss in the assembly group increased with the working age of the workers ( P<0.05). The hearing loss detection rate and DR chest X-ray abnormality detection rate of the workers with ≥9 years working age in the welding group were both higher than those in the assembly group workers with same working age ( P<0.05). The binary logistic regression analysis showed that abnormal pulmonary ventilation and abnormal DR chest X-ray were the risk factors for hearing loss in welding workers ( OR=10.83, 95% CI: 7.31-16.06; OR=16.59, 95% CI: 5.72-48.10; P<0.05) . Conclusion:Hearing loss and respiratory damage are prominent problems among welding workers, and the detection rates of abnormality increase with the working age of the workers. Hearing loss in welding workers is associated with abnormal pulmonary ventilation and abnormal DR chest X-ray.

Objective:To investigate the occupational health status of electric welding workers and explore the effects of electric welding on hearing loss and respiratory damage.Methods:From August to December 2021, the cluster sampling method was used to select workers from an automobile manufacturer in Guangzhou City as research subjects: 636 welding workers in the welding workshop as the welding group, 757 assembly workers in the engine workshop and the final assembly workshop exposed to pure noise as the assembly group. Occupational disease hazard factors were detected for welding positions and assembly positions, and occupational health examination was carried out for research subjects. The occupational health status, the trends of hearing loss and respiratory abnormalities with working age were compared and analyzed between the two groups. Binary logistic regression was used to analyze the association between hearing loss and respiratory abnormalities in welding workers.Results:The excess rates of welding fumes, manganese and its compounds in the welding position were both 9.68% (3/31). Its noise exposure intensity [ (85.36±2.68) dB (A) ] and excess rate [48.39% (15/31) ] were not significantly different from those in the assembly position [ (84.86±3.28) dB (A) and 43.24% (16/37) ] ( P>0.05). The results of the occupational health examination showed that the detection rates of hearing loss, digital radiography (DR) chest X-ray abnormality, alanine aminotransferase abnormality, deazelaic aminotransferase abnormality and white blood cell count abnormality of workers in the welding group were higher than those in the assembly group ( P<0.05). The detection rates of hearing loss, DR chest X-ray abnormality, pulmonary ventilation abnormality in the welding group and the detection rate of hearing loss in the assembly group increased with the working age of the workers ( P<0.05). The hearing loss detection rate and DR chest X-ray abnormality detection rate of the workers with ≥9 years working age in the welding group were both higher than those in the assembly group workers with same working age ( P<0.05). The binary logistic regression analysis showed that abnormal pulmonary ventilation and abnormal DR chest X-ray were the risk factors for hearing loss in welding workers ( OR=10.83, 95% CI: 7.31-16.06; OR=16.59, 95% CI: 5.72-48.10; P<0.05) . Conclusion:Hearing loss and respiratory damage are prominent problems among welding workers, and the detection rates of abnormality increase with the working age of the workers. Hearing loss in welding workers is associated with abnormal pulmonary ventilation and abnormal DR chest X-ray.

Objective To observe the influences on prognoses and airway acid and base levels while using anti-inflammatory and anti-reflux therapies combined with "Hezhong Fuzheng massage" for treatment of infants with gastric volvulus (GV) and gastroesophageal reflux (GER)-induced pneumonia in order to provide evidence for clinical diagnosis and treatment of such infant disease. Methods Sixty infants 1-6 months old admitted to the Department of Integrated Traditional Chinese and Western Medicine of Wuhan Children's Hospital from January 2013 to December 2015 were diagnosed as pneumonia combined with GV and GER by the chest radiograph and radiography of upper gastrointestinal tract (UGT) with iodine, and according to difference in diagnostic methods, they were divided into an observation 1 group (30 cases) and an observation 2 group (30 cases). In observation 1 group, 24-hour pH value in upper digestive tract especially the distal esophagus was dynamically monitored, while in observation 2 group, 24-hour multichannel intraluminal impedance (MII) combined with pH monitoring of esophagus was carried out. Furthermore, two control groups were set up, each 30 cases; after radiography of the UGT with iodine, the control 1 group was diagnosed as GV and GER without pneumonia and control 2 group was diagnosed as only simple GV. Treatment of infant pneumonia was carried out in accordance with the guidelines for the management of community-acquired pneumonia in children; the treatment of GV and GER included postural, dietary, prokinetic and Hezhong Fuzheng massage [acupoint selection and massage was undertaken in 5 steps: push from the palmar crease to Banmen (rectilinear pushing manipulation) 300 times, push abdominal Yin and Yang (finger-pushing massage) 200 times, palpate the abdomen (clockwise) 100 times, poking of Tianshu 100 times, poke alternately bilateral Zusanli 100 times. Once-daily massage, (15±2) minutes each time, for consecutive 7 days]. The results of pH monitoring of the distal esophagus in observation 1 group was recorded; All GER data concerning pH monitoring of observation 2 group and the results of esophagus multi-channel intra-luminal impedance combined with pH monitoring in control group were compared. After 7 days of continuous treatment, the clinical efficacy of pneumonia and GV, hospitalization time, prognosis and the changes of sputum pH before and after treatment in the two observation groups were compared. Results In two observation groups, the main type of 60 cases with GV was organoaxial volvulus, accounting for 91.67% (55 cases), and more than 60% patients exhibited sputum pH <7.0. The distal esophagus 24-hour pH dynamic monitoring in observation 1 group showed that there were 26 cases with acid reflux (86.67%), 4 cases with GER negative (13.33%), the proportion of pH < 4 in GER negative patients was significantly lower than that in moderate acid reflux patients [3.35% (0.77% - 8.08%) vs. 26.23% (15.19% - 42.87%), P < 0.05], the number of long reflux (> 5 minutes) in GER negative patients was significantly reduced than that in mild acid reflux patients [times: 2 (0-5) vs. 7 (2-15), P < 0.05], the longest time of reflux in GER negative patients was significantly shorter than that in either mild or moderate acid reflux patients [minutes: 5.9 (2.5-10.0) vs. 19.2 (5.9-51.0), 41.6 (16.9-121.0), both P < 0.05]. The 24-hour MII-pH monitoring of esophagus in observation 2 group showed that there were 30 cases with pathological reflux, mainly mild acid reflux accounting for 90%, in which the percentage of proximal reflux events was 46.07% in the total reflux events. The numbers of acid reflux and proximal reflux in the observation 2 group were significantly higher than those in the control 1 and 2 groups [1 305 (37.72%) vs. 795 (25.69%) and 136 (18.89%), 1 594 (46.07%) vs. 687 (22.20%) and 154 (21.39%), both P < 0.05]; there were no significant differences in total effective rate (100% vs. 100%, P > 0.05) and hospitalization time (days: 7.58±1.09 vs. 7.67±1.12, P > 0.05) between the two observation groups. Conclusions For the diagnosis of infant pneumonia combined with GV and GER, the first selection of chest radiograph and radiography of the UGT with iodine can identify the severity of pneumonia, whether it is complicated with GV and its classification, and whether GER exists at the same time. The estimation of 24-hour pH dynamic monitoring of the acid reflux in the upper digestive tract especially the distal esophagus is consistent with that of the 24-hour MII-PH monitoring of esophagus. Moreover, 24-hour MII-PH monitoring of esophagus can also identify non-acid reflux, resulting in the GER diagnosis more accurate. Since the proximal reflux ratio of infants with GV combined with GER and pneumonia is relatively high and easy to cause cough and aspiration. attention should be paid on early diagnosis and timely intervention to such patients. The sputum acidity test can reflect the airway acid-base level and its manipulation is simple, so by that the real time disease situation can be estimated, and aspiration of sputum also can help the treatment. The therapeutic schedule formulated by our group can elevate the therapeutic effect, improve the airway acid-base environment and benefit prognosis.

This article investigated an occupational chemical poisoning incident that occurred in a certain place in Guangdong Province in September 2020, detected the air at the scene, and analyzed the clinical data of the poisoned patients. The peripheral blood methanol concentrations of the three patients were 307.76 mg/L, 354.80 mg/L and 454.14 mg/L when they were admitted to the hospital. The raw and auxiliary materials were analyzed for volatile organic components. Methyl acetate was detected in the finished glue, synthetic resin and compound machine post glue in the glue room, and the relative percentages were 23.05%, 32.79% and 31.68%, respectively. Through comprehensive analysis, it was judged that this incident was an acute occupational methyl acetate poisoning incident, and 3 workers were poisoned.

Objective This study aimed to evaluate the impact of technical advancement of radiation therapy in patients with LA?NSCLC receiving definitive radiotherapy (RT). Methods Patients treated with definitive RT (≥50 Gy) between 2000 and 2010 were retrospectively reviewed. Overall survival ( OS) , cancer specific survival ( CSS) , locoregional progression?free survival ( LRPFS) , distant metastasis?free survival (DMFS) and progression?free survival (PFS) were calculated and compared among patients irradiated with different techniques. Radiation?induced lung injury ( RILI) and esophageal injury ( RIEI) were assessed according to the National Cancer Institute Common Terminology Criteria for Adverse Events 3.0 ( NCI?CTCAE 3.0) . Results A total of 946 patients were eligible for analysis, including 288 treated with two?dimensional radiotherapy ( 2D?RT) , 209 with three?dimensional conformal radiation therapy ( 3D?CRT) and 449 with intensity?modulated radiation therapy ( IMRT) respectively. The median follow?up time for the whole population was 84.1 months. The median OS of 2D?RT, 3D?CRT and IMRT groups were 15.8, 19.7 and 23.3 months, respectively, with the corresponding 5?year survival rate of 8. 7%, 13. 0% and 18. 8%, respectively ( P<0.001) . The univariate analysis demonstrated significantly inferior OS, LRPFS, DMFS and PFS of 2D?RT than those provided by 3D?CRT or IMRT. The univariate analysis also revealed that the IMRT group had significantly loger LRPFS and a trend toward better OS and DMFS compared with 3D?CRT. Multivariate analysis showed that TNM stage, RT technique and KPS were independent factors correlated with all survival indexes. Compared with 2D?RT, the utilization of IMRT was associated with significantly improved OS, LRPFS, DMFS as well as PFS. Compared with 3D?CRT, IMRT provided superior DMFS ( P=0.035), a trend approaching significance with regard to LRPFS (P=0.073) but no statistically significant improvement on OS, CSS and PFS in multivariate analysis. The incidence rates of RILI were significantly decreased in the IMRT group (29.3% vs. 26.6% vs.14.0%, P<0.001) whereas that of RIET rates were similar (34.7% vs. 29.7% vs. 35.3%, P=0.342) among the three groups. Conclusions Radiation therapy technique is a factor affecting prognosis of LA?NSCLC patients. Advanced radiation therapy technique is associated with improved tumor control and survival, and decreased radiation?induced lung toxicity.

This article investigated an occupational chemical poisoning incident that occurred in a certain place in Guangdong Province in September 2020, detected the air at the scene, and analyzed the clinical data of the poisoned patients. The peripheral blood methanol concentrations of the three patients were 307.76 mg/L, 354.80 mg/L and 454.14 mg/L when they were admitted to the hospital. The raw and auxiliary materials were analyzed for volatile organic components. Methyl acetate was detected in the finished glue, synthetic resin and compound machine post glue in the glue room, and the relative percentages were 23.05%, 32.79% and 31.68%, respectively. Through comprehensive analysis, it was judged that this incident was an acute occupational methyl acetate poisoning incident, and 3 workers were poisoned.

Objective This study aimed to evaluate the impact of technical advancement of radiation therapy in patients with LA?NSCLC receiving definitive radiotherapy (RT). Methods Patients treated with definitive RT (≥50 Gy) between 2000 and 2010 were retrospectively reviewed. Overall survival ( OS) , cancer specific survival ( CSS) , locoregional progression?free survival ( LRPFS) , distant metastasis?free survival (DMFS) and progression?free survival (PFS) were calculated and compared among patients irradiated with different techniques. Radiation?induced lung injury ( RILI) and esophageal injury ( RIEI) were assessed according to the National Cancer Institute Common Terminology Criteria for Adverse Events 3.0 ( NCI?CTCAE 3.0) . Results A total of 946 patients were eligible for analysis, including 288 treated with two?dimensional radiotherapy ( 2D?RT) , 209 with three?dimensional conformal radiation therapy ( 3D?CRT) and 449 with intensity?modulated radiation therapy ( IMRT) respectively. The median follow?up time for the whole population was 84.1 months. The median OS of 2D?RT, 3D?CRT and IMRT groups were 15.8, 19.7 and 23.3 months, respectively, with the corresponding 5?year survival rate of 8. 7%, 13. 0% and 18. 8%, respectively ( P<0.001) . The univariate analysis demonstrated significantly inferior OS, LRPFS, DMFS and PFS of 2D?RT than those provided by 3D?CRT or IMRT. The univariate analysis also revealed that the IMRT group had significantly loger LRPFS and a trend toward better OS and DMFS compared with 3D?CRT. Multivariate analysis showed that TNM stage, RT technique and KPS were independent factors correlated with all survival indexes. Compared with 2D?RT, the utilization of IMRT was associated with significantly improved OS, LRPFS, DMFS as well as PFS. Compared with 3D?CRT, IMRT provided superior DMFS ( P=0.035), a trend approaching significance with regard to LRPFS (P=0.073) but no statistically significant improvement on OS, CSS and PFS in multivariate analysis. The incidence rates of RILI were significantly decreased in the IMRT group (29.3% vs. 26.6% vs.14.0%, P<0.001) whereas that of RIET rates were similar (34.7% vs. 29.7% vs. 35.3%, P=0.342) among the three groups. Conclusions Radiation therapy technique is a factor affecting prognosis of LA?NSCLC patients. Advanced radiation therapy technique is associated with improved tumor control and survival, and decreased radiation?induced lung toxicity.

OBJECTIVETo analyze the efficacy and toxicity of concurrent chemoradiotherapy (CCRT) for patients with locally advanced non-small-cell lung cancer (LA-NSCLC).

METHODSClinical data of 251 patients with stage III (76 IIIA and 175 IIIB) NSCLC who received CCRT as initial treatment between Jan 2001 and Dec 2010 in our hospital were reviewed. A median total radiotherapy dose of 60 Gy (range, 50-74 Gy) were delivered. 174 patients were treated with IMRT, 51 with 3D-CRT and 26 with 2D-radiotherapy. EP chemotherapy regimen was administered in 112 patients, PC regimen in 99 patients, topotecan regimen in 18 patients and other regimens in the remaining 22 patients. The efficacy and toxicity of CCRT were retrospectively analyzed.

RESULTS244 patients were assessable for response, including 6 (2.5%) patients with CR, 183 (75.0%) with PR, 42 (17.2%) with SD and 13 (5.3%) with PD. At a median follow-up period of 20 months, the 1-, 3-, 5- year OS were 69.2%, 31.2%, 23.2%, respectively, and the median OS was 21 months. The 1-, 3-, 5- year PFS were 40.9%, 22.1%, 17.7%, respectively, and the median PFS was 10 months. Patients with stage IIIA NSCLC achieved better 5-year OS than that with IIIB NSCLC (29.2% vs. 20.7%, χ2=2.254, P=0.133). Failure pattern was assessable in 244 patients, including 61 (25.0%) locoregional progression alone, 55 (22.5%) distant metastasis alone and 77 (31.6%) with both. The rates of grade≥3 radiation pneumonitis, esophagitis and hematologic toxicity were 4.4%, 11.2% and 26.4%, respectively.

CONCLUSIONSCCRT provide stage III NSCLC patients favorable outcome with acceptable toxicity. CCRT is standard therapeutic approach for patients with unresectable locally advanced NSCLC.

Antineoplastic Combined Chemotherapy Protocols ; administration & dosage ; therapeutic use ; Carcinoma, Non-Small-Cell Lung ; pathology ; therapy ; Chemoradiotherapy ; Cisplatin ; administration & dosage ; Cyclophosphamide ; administration & dosage ; Esophagitis ; etiology ; Humans ; Lung Neoplasms ; pathology ; therapy ; Neoplasm Staging ; Radiation Pneumonitis ; etiology ; Radiotherapy, Conformal ; Retrospective Studies ; Topotecan ; administration & dosage