Objective To introduce a novel technique of intracolonic shunt procedure used in the anus - preserving operation for acute intestinal obstruction resulted from cancer at low and middle portions of rectum and assess the clinical significance. Methods In total, 81 patients with acute obstruction of low and middle portion of rectum caused by cancer were randomly ( random number) divided into control group and study group. In control group, 42 patients were operated with preventive transverse colonostomy or terminal ileum stoma after low proximal resection of rectum involved in cancer, while 39 patients were operated with intracolonic shunt procedure by using a biodegradable anastomosis ring and a condom placed 5 cm above anastomosis for protection in study group. Results There were no significant differences in sex, age, tumor site, tumor size and the distance from anstomosis to anal-edge between two groups. In both groups, the bowel movement resumed in 2 ~ 5 days after operation (P > 0.05). In study group, the rate of anastomosis leakage was 7.7% (3/39), and leakages were treated with drainage for 7.1 days in average to be healed, and the biodegradable anastomosis ring detached and were discharged in 14 -23 days (17 days in average), and there were no complications of drainage happened. The anastomotic stenosis occurred in three patients (7. 7% ) within 6 months after operation. In control group, 11.9% patients (5/42) had anastomosis leakage and they treated with drainage for 18.2 days in average to get the leakage healed, and 35. 7% patients (15/42) had stoma complications, and anastomotic stenosis happened in 28.6% patients (12/42) within 6 months after operation, and 7. 1% patients need another operation because of severe anastomosis stenosis. There were no significant differences in rate of anastomosis leakage between tow groups ( P > 0. 05), but there were significant differences in drainage days after anstomosis leakage happened and 6 - months anastomosis stenosis between two groups (P<0.05). Conclusions In the anus -preserving operation for acute intestinal obstruction at low and middle portions of rectum caused by cancer , the intracolonic shunt procedure is convenient and safty, and reduces the hazard incurred by anastomosis leakage and anastomosis stenosis compared with classic stoma operation.

Objective To analyze the monitoring status of occupational hazard factors in key industry workplaces in a city of the Pearl River Delta area from 2019 to 2023. Methods A total of 1 548 enterprises in 12 key industries of the city were selected as the research subjects using the judgmental sampling method. Their monitoring data for dust, chemical factors, and noise, along with the occupational health management status of the enterprises were analyzed. Results Among the 1 548 enterprises, large and medium-sized enterprises accounted for 2.7% and 13.4%, while small and micro enterprises accounted for 83.9%. A total of 474 enterprises exceeded the national limit in the detection of occupational hazard factors, with an exceedance rate of 30.6%. The rates of workers exposed to occupational hazard factors, dust, chemical factors, and noise were 29.4%, 6.9%, 21.0%, and 13.0%, respectively, all showing a downward trend year by year (all P<0.05). The training rates for occupational health among enterprise managers, responsible persons, and workers were 84.1%, 84.2%, and 91.2%, respectively. The detection rates for abnormal occupational health examinations among workers exposed to dust, chemical factors, and noise were 0.2%, 0.3%, and 0.5%, respectively. The setting rates of warning signs and warning instructions among enterprises for dust, chemical toxins, and noise were 87.3%, 91.1%, and 89.5%, respectively. The setting rates for dust, toxic chemical, and noise control facilities were 72.4%, 75.4%, and 46.0%, with effectiveness rates of 70.5%, 56.6%, and 55.2%, respectively. The distribution rates of personal protective dust masks, gas masks, and noise earplugs/earmuffs were 91.9%, 83.8%, and 86.4%, with wearing rates of 80.8%, 70.5%, and 76.4%, respectively. The detection rates of exceeding national limits for dust, chemical factors, and noise in the work site of occupational hazard factors were15.2%, 1.0%, and 21.6%, respectively. The detection rates of exceeding national limits for dust, chemical factors, and noise in the workplace of occupational hazard factors were 2.4%, 2.5%, and 12.3%, respectively. The exceedance rate for noise in work site showed an upward trend year by year (P<0.01). Conclusion Occupational disease prevention and control work in the key industries of this city needs strengthening. It is essential to further enhance the regular monitoring and preventive measures of occupational hazard factors in enterprises, improve protective measures, strengthen the use of personal protective equipment, and enhance occupational health training and supervision, to effectively reduce the risk of occupational diseases and protect workers' occupational health rights.

Objective To investigate the clinical efficacy of cyclosporine injection in subclinical or critical treatment of renal transplant patients，and to establish an individualized dosage regimen of cyclosporine injection by studying the effects of nine single nucleotide polymorphisms related to the pharmacokinetics of cyclosporine on the dose-adjusted trough concentration (C₀/D′) of cyclosporine injection. Methods Blood samples and clinical data of 144 adult renal transplant patients who used cyclosporine injection were collected and recorded, then, their genotypes of CYP3A4*18B, CYP3A5*3, ABCB1 (C1236T, G2677T/A, C3435T), POR*28, PXR (C5705T, C39823T) and NFKB1-94 ins/del ATTG were determined by Sequenom MassARRAY^® SNP methods. Then, the discrepancies of cyclosporine injection’s C₀/D′ among the patients with different genotypes was compared and an individualized dosage regimen based on gene polymorphism of cyclosporine injection was established by using multivariate regression analysis. Results Cyclosporine injection improved serum creatinine level by 68.8% in renal transplant patients with subclinical or critical rejection, and the steady-state plasma concentration was (189.50±38.56) ng/ml. The CYP3A4*18B gene polymorphism was significantly correlated to C₀/D' of cyclosporine injection, and the C₀/D' of patients with *1/*1 genotype was significantly higher than patients of *18B/*18B genotype; but CYP3A5*3, ABCB1(C1236T, G2677T/A, C3435T), PXR C5705T, PXR C39823T, NFKB1-94 ins/del ATTG and POR*28 gene polymorphisms were not significantly correlated to C₀/D' of cyclosporine injection. In the final regression model, hemoglobin and CYP3A4*18B gene polymorphisms were significantly correlated to C₀/D' of cyclosporine injection. Conclusion Cyclosporine injection can effectively improve the serum creatinine level in patients with subclinical or critical rejection; CYP3A4*18B gene polymorphism is significantly correlated to C₀/D' of cyclosporine injection.

OBJECTIVE： To investigate the relationship between ATP-binding cassette subfamily B member 1 （ABCB1） polymorphism and tacrolimus-related adverse drug reactions in renal transplant patients during perioperative period. METHODS： Totally 170 patients who underwent renal transplantation from Nov. 2014 to Mar. 2018 in our hospital as well as were tested for their ABCB1 C1236T （rs1128503）， ABCB1 G2677T/A （rs2032582） and ABCB1 C3435T （rs1045642） genotype were selected in this study. χ2 test was used to compare the incidence of tacrolimus-related ADR among patients with different genotypes. The related adverse reactions included digestive tract reaction， pulmonary infection， renal dysfunction， abnormal liver function， elevated blood sugar， elevated blood lipid and decreased white blood cells. Logistic regression model was used to analyze the unit point risk. The main haplotypes of the above genes were analyzed by PHASE software， and their correlation with tacrolimus-induced ADR was analyzed. RESULTS： Among 170 patients， 21 cases （12.3％） of CC type， 78 cases （45.9％） of CT type and 71 cases （41.8％） of TT type were detected by ABCB1 C1236T （rs1128503）. ABCB1 G2677T/A （rs2032582） test showed that 25 cases （14.7％） were GG type， 95 cases （55.9％） were GA+GT type and 50 cases （29.4％） were AA+AT+TT type. ABCB1 C3435T （rs1045642） test showed that 57 cases （33.5％） were CC type， 82 cases （48.2％） were CT type and 31 cases （18.3％） were TT type. There was no significant difference in the incidence of digestive tract reaction， pulmonary infection， renal dysfunction， elevated blood sugar， elevated blood lipid and decreased white blood cells among patients with different ABCB1 genotypes （P＞0.05）. However， there was significant difference in the incidence of abnormal liver function between ABCB1 C1236T （rs1128503） and ABCB1 C3435T （rs1045642） genotypes （P＜0.05）. There was no significant difference in the incidence of abnormal liver function among ABCB1 G2677T/A （rs2032582） genotypes （P＝0.069）， but P was lower than 0.1. Logistic regression analysis showed that ABCB1 C1236T （rs1128503） CC genotype [OR＝4.959， 95％CI （1.700， 14.468）， P＝0.003]， ABCB1 G2677T/A （rs2032582） GG genotype [OR＝3.500， 95％CI （1.164， 10.524）， P＝0.026] and ABCB1 C3435T （rs1045642） CC genotype [OR＝3.033， 95％CI （1.012， 9.095）， P＝0.048] were risk factors for tacrolimus-related abnormal liver function. ABCB1 CGC haplotype was the main haplotype. There was significant difference in the incidence of abnormal liver function caused by tacrolimus between ABCB1 CGC haplotype and non-ABCB1 CGC haplotype （P＝0.002）， and it was also a risk factor for tacrolimus-related liver dysfunction [OR＝3.173， 95％CI（1.512， 6.656）， P＝0.002]. CONCLUSIONS： The abnormal liver function of ABCB1 CGC haplotype kidney transplantation patients is more likely to occur when tacrolimus is administered during the perioperative period.