Objective To systematically evaluate the efficacy of home noninvasive positive pressure ventilation (HNPPV) on patients with severe stable chronic obstructive pulmonary disease in China. Methods Systematic literature search was performed in Chinese BioMedical Literature Database, WanFang Data, VIP Database, Chinese National knowledge Infrastructure databases from inception to January 2018. All randomized controlled trials (RCTs) that reported comparison of the efficacy of HNPPV on patients with severe stable chronic obstructive pulmonary disease were included. All related data were extracted. Meta-analysis was conducted using the statistical software RevMan 5.3 on the basis of strict quality evaluation. Results A total of 767 patients from 14 studies were included in this meta-analysis. The combined results showed that, compared with the control group, HNPPV could significantly reduce the mortality (relative risk 0.51, 95%CI 0.33 – 0.78, P=0.002) and PaCO2 ［weighted mean difference (MD) –10.78, 95%CI –13.17 – –8.39, P<0.000 01］ of patients, improve the levels of PaO2 (MD 7.84, 95%CI 5.81 – 9.87, P<0.000 01), FEV1 (MD 0.13, 95%CI 0.08 – 0.18, P<0.000 01), and the quality of life (MD –6.27, 95% CI –9.04 – –3.51, P<0.000 01). Conclusion HNPPV can reduce the mortality of patients, improve the gas exchange, pulmonary function and the quality of life, but more large sample, high-quality, and multicenter RCT studies are needed.
Objective To systematically review the association between menstrual condition and the risk of breast cancer. Methods We searched The Cochrane Library (Issue 4, 2016), PubMed, EMbase, CNKI, WanFang Data, VIP and ScienceDirect databases from inception to June 1st 2016 to collect case-control studies about the association between menstrual condition and breast cancer. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies. Then, meta-analysis was performed using Stata12.0 software. Results Eighty-three studies involving 48 811 breast cancer patients and 57 268 controls were finally included. The results of meta-analysis showed that breast cancer was associated with age at menarche≤13 years old (OR=1.17, 95%CI 1.12 to 1.24) and irregular menstruation (OR=1.98, 95%CI 1.62 to 2.41), but was not associated with history of dysmenorrhea, cycle time≥30 days and period of time>7 days. Further subgroup analysis showed that the sample size was one of the main source of heterogeneity for history of dysmenorrheal analysis, and breast cancer was associated with the history of dysmenorrhea after removing small-sampled studies (OR=1.47, 95%CI 1.36 to 1.59). The association between breast cancer and age at menarche≤13 years old, irregular menstruation was statistically significant in community control, but not in hospital control. The association between breast cancer and age at menarche≤13 years old, irregular menstruation were statistically significant both in Chinese and foreign population. Conclusion Early age at menarche, irregular menstruation and history of dysmenorrhea may be risk factors of breast cancer. Due to the limitation of quality and quanity of included studies, the above conclusions need more researches to verify.
Objective To explore the effectiveness of hairpin shaped incision combined with cover-lifting flap in plastic surgery of huge fat pad on nape and back. Methods Between March 2019 and March 2023, 10 patients with huge fat pad on the nape and back were treated. There was 1 male and 9 females with an average age of 52 years (range, 39-57 years). All patients had soft tissue bulge on the nape and back. Preoperative MRI showed the subcutaneous fat thickening. The length of the longitudinal axis of the fat pad ranged from 10.0 to 25.0 cm (mean, 14.1 cm), the length of the transverse axis ranged from 6.0 to 15.0 cm (mean, 10.8 cm); the thickness of the fat pad ranged from 2.5 to 5.1 cm (mean, 3.9 cm). Under general anesthesia, the patient was placed in a prone position and a hairpin shaped incision was made. The flap was lifted to remove the fat pad according to the marked area. The dressing was changed every 2 days after operation. ResultsThe operation time was 35-110 minutes (mean, 72 minutes). The intraoperative blood loss was 35-80 mL (mean, 49.5 mL). The drainage tube was removed at 2-5 days after operation (mean, 3.4 days). All incisions healed by first intention without incision dehiscence, infection, subcutaneous bruising, hematoma, or other related complications. All patients were followed up 2-24 months (mean, 12 months). All patients had a good shape of the nape and back and no noticeable scar on the incision. According to the Vancouver Scar Scale evaluation criteria, the incision scar score was 3-5 (mean, 3.7) at 2 months after operation. Patients had good neck movement with no recurrence. ConclusionFor the huge fat pad on the nape and back, the plastic surgery using hairpin shaped incision and cover-lifting flap has the advantages of fully exposing the fat pad, concealed incision, simple operation, and natural shape of the nape and back after operation.