Objective To compare the effects of mammaplasty, non mammaplasty and prosthesis reconstruction in the treatment of quadrant or massive mastectomy. Methods One hundred and twenty patients with segmental or quadrant mastectomy in the First People′s Hospital of Huizhou from February 2015 to December 2016 were selected for the study. The patients were divided into three groups:the mammaplasty group (48 cases),the non mammaplasty group (40 cases),and the prosthesis reconstruction group (32 cases). The patients in the mammaplasty group were treated with quadrant or massive mastectomy, patients in the non mammaplasty group were treated with chest wall fat fascia flap and the prosthesis reconstruction group was treated with the application of the skin flap of the lateral chest wall. The general operation situation of the three groups were recorded,including operation time,indwelling time of drainage tube,hospitalization time and postoperative hospitalization time. The satisfaction and complications of breast reconstruction were compared among the three groups. Results The operation time of the mammaplasty group, non mammaplasty group and prosthesis reconstruction group were (71. 5±18. 4) min,(55. 9±14. 3) min and (89. 7±21. 3) min respectively,there was significant difference among the three groups (F=31.32,P<0.01).The operation time of the mammaplasty group was longer than that of the non mammaplasty group, but less than that of the prosthetic reconstruction group, the difference was statistically significant ( P< 0. 05 ) . The hospitalization time and postoperative hospitalization time in the prosthesis reconstruction group were ( 13. 7 ± 3. 4 ) d and ( 10. 9 ± 2. 6 ) d, mammaplasty group (11. 4±2. 2) d and (8. 6±1. 9) d respectively,non mammaplasty group (11. 3±2) d and (8±1. 8) d respectively. The differences among the 3 groups were statistically significant (F=10. 20,18. 88,P <0. 01) . The postoperative hospitalization time of the prosthesis group was significantly longer than those in the other two groups ( P<0. 05) . The indwelling time of the drainage tube was close in the 3 groups. The overall satisfaction of breast reconstruction in the mammaplasty group, non mammaplasty group and the prosthesis reconstruction group were respectively ( 9. 2 ± 0. 8 ) points, ( 9. 1 ± 0. 6 ) points, ( 7. 9 ± 1. 3 ) points, and the difference was statistically significant ( F=23. 22,P<0. 01) . The satisfaction degrees of breast reconstruction in the mammaplasty group and the prosthesis reconstruction group were equal, higher than that in the non mammaplasty group,the differences were statistically significant ( P<0. 05) . The incidence of wound infection in the mammaplasty group, non mammaplasty group and prosthesis reconstruction group were 10. 4% ( 5/48 ) , 10. 0% (4/40) and 6. 3% (2/32),respectively,the difference was not statistically significant (χ2=1. 29,P=0. 08) . Conclusion In quadrant or massive mastectomy,lateral chest wall fat fascia flap has simple operation and high safety,and the restoration effect is good,which can be widely used in clinical practice.

Objective To study the disinfection effect of ozone on the natural bacteria in indoor air and the central air condition ductwork. Methods Ozonizer was installed on the outlet of central air condition main pipeline and when it began to send breeze, ozone was taken to each branch piping and each room. Then, at the vents of pipeline and in the rooms, the quantity of the natural germs was examined before and after disinfection respectively. The death rate was calculated. Results After 60 minutes of ozone disinfection, the death rate of the natural germs at the vents of central air condition was 60%-90%, that of indoor air was -40.00%-71.43%. Conclusion Ozone can effectively kill the natural germs in ductwork of central air condition, but when the concentration of ozone is lower and there are people in the room, the efficiency will decrease.

OBJECTIVE: To improve the dissolution rate of nitrendipine in vitro using co-grinding method.METHODS: Single-factor test was adopted to detect effect of phases of co-grinding,category of excipients (MCC,PVPk30,HPC,HPMC),time (0,10,20,30,40,50,60 min) of co-grinding and ratio of principal component to excipients (1 ∶ 1,1 ∶ 2,1 ∶ 3,1 ∶ 4,1 ∶ 5,1 ∶ 6,1 ∶ 7,1 ∶ 8,1 ∶ 9) on in vitro dissolution of nitrendipine power and tablet.RESULTS: The condition of co-grinding method was as follows: dual co-grinding phase,HPC or MCC as excipients,co-grinding time of 40 min,ratio of principal component to excipients was 1 ∶ 4.Accumulative dissolution rate of nitrendipine powder was more than 80% within 10 min and that of nitrendipine tablet was more than 80% within 40 min.CONCLUSION: Co-grinding method can improve the dissolution rate of poorly water-soluble nitrendipine in vitro under suitable condition.

The anterior cruciate ligament (ACL) injury is a common sports injury that has a significant impact on knee function and patients′ mobility. With the popularity of national fitness campaign in China, the incidence of ACL injury is increasing year by year. Currently, there still lacks clinical standards or guidelines on how to choose appropriate treatment methods, surgical plans and rehabilitation protocols for ACL injury. In order to timely reflect the new treatment concept of ACL injury, standardize its diagnosis and treatment and improve the curative effect, the Sports Medicine Society of Chinese Research Hospital Association and the Editorial Board of Chinese Journal of Trauma organized domestic orthopedic and sports medicine experts to formulate the "clinical evidence-based guideline for the diagnosis and treatment of anterior cruciate ligament injury (2022 version)" based on the level of evidence-based medicine and in compliance with the principle of scientificity, practicability and advancement. The present guideline includes 12 recommendations for the diagnosis, treatment and rehabilitation of ACL injury in order to provide guidance and assistance for the clinical diagnosis and treatment of ACL injury in China.

ObjectiveTo explore the intervention effect and mechanism of Buzhong Yiqiwan （BZYQ） on colitis mice. MethodSixty-four C57BL/6 mice were randomly divided into 2 weeks blank group， 2 weeks model group， 2 weeks high-dose BZYQ （12 g·kg^-1） group， 2 weeks low-dose BZYQ （6 g·kg^-1） group， 4 weeks blank group， 4 weeks model group， 4 weeks high-dose BZYQ （12 g·kg^-1） group， and 4 weeks low-dose BZYQ （6 g·kg^-1） group. The colitis model was induced in mice by feeding 3% dextran sodium sulfate （DSS） for 7 days. The mice received BZYQ （12 and 6 g·kg^-1） by gavage on the 8^th day after modeling， once per day， and sacrificed on the 2^nd and 4^th weeks， correspondingly. The colon length and weight of mice in each group were measured. Hematoxylin-eosin （HE） staining was used for pathological observation and colonic mucosal inflammation was scored. The mRNA and protein expression of NOD-like receptor thermoprotein domain 3 （NLRP3）， apoptosis-associated speck-like protein containing a CARD （ASC）， and cysteinyl aspartate-specific protease-1 （Caspase-1） was detected by real-time quantitative polymerase chain reaction （Real-time PCR） and Western blot， respectively. Enzyme-linked immunosorbent assay （ELISA） was used to detect the content of inflammatory cytokines， such as interleukin （IL）-1β， IL-18， and IL-33 in colonic tissues. ResultCompared with the 2 weeks blank group， the 2 weeks model group showed shortened colon length， increased colon weight （P<0.05）， loss of epithelial cells， destruction of gland structure， infiltration of a large number of inflammatory cells in mucosa and submucosa， local crypt abscess， and increase in mucosal inflammation score （P<0.01） as revealed by light microscopy， elevated levels of IL-1β， IL-18， and IL-33 in colonic tissues （P<0.05）， and increased mRNA and protein expression of NLRP3， ASC， and Caspase-1 （P<0.05）. The intervention of BZYQ （12 g·kg^-1） restored colon length， alleviated mucosal injury （P<0.05）， down-regulated the content of IL-18 （P<0.05）， reduced the mRNA expression of NLRP3 and ASC as well as the protein expression of ASC and Caspase-1 compared with the conditions in the 2 weeks model group. Compared with the 4 weeks blank group， the 4 weeks model group showed decreased colon length， increased colon weight （P<0.05）， decreased glands in the mucosal layer， expansion of glandular cavity， atrophy of crypt， local connective tissue hyperplasia and lymphocyte infiltration， increased inflammation score （P<0.01） as revealed by the light microscopy， increased expression of IL-1β， IL-18， and IL-33 （P<0.05）， and elevated mRNA and expression of NLRP3 inflammasome complex （P<0.05）. Compared with the conditions in the 4 weeks model group， the intervention of BZYQ （12 and 6 g·kg^-1） could improve colon length and weight （P<0.05）， and the intervention of BZYQ （12 g·kg^-1） could also improve the inflammation score of the colon （P<0.05）. Different from the acute stage， the intervention of BZYQ （12 and 6 g·kg^-1） increased the content of IL-33 in the intestinal mucosa and up-regulated the mRNA and protein expression of NLRP3 inflammasome complexes ASC and Caspase-1 （P<0.05）. ConclusionBZYQ can relieve the injury of colitis induced by DSS in mice. The mechanism is related to the regulation of intestinal immune response mediated by NLRP3 inflammasome， and it has different regulatory effects in acute and chronic inflammation stages.