DIU de levonorgestrel como método anticonceptivo: aceptación,continuidad y asesoramiento en España

Objective

To evaluate acceptability and continuity of use of the levonorgestrel intrauterine device (LNG-IUD, Mirena®) as a contraceptive method among Spanish women choosing intrauterine contraception, with special attention paid to counselling.

Methods

Women requesting contraception were informed of the available choices, including the LNG-IUD. Variables involved in the choice of method, including counselling, were evaluated. Women who chose Mirena® were followed-up for 1 year.

Results

Of the 944 women included in this study, 542 chose the LNG-IUD. We observed a significant and progressive decrease in bleeding and in the number of bleeding days and sanitary pads used (from 21.00 ± 14.22 sanitary pads at insertion to 3.59 ± 4.86 after 1 year). Adverse effects were reported by 21.75%, 16.03% and 13.67% of women at visits 2, 3 and 4 respectively. In general, Mirena® was well tolerated, producing no major adverse effects. No pregnancies or major complications were observed. Alter 1 year of use, satisfaction was good-very good in 93% of users and the continuation rate was over 90%.Conclusions The LNG-IUD is a suitable contraceptive method for Spanish women interested in intrauterine contraception, especially those with heavy menstrual bleeding. Satisfaction and continuation rates are high. Adverse effects are minor, generally well tolerated, and can last for the first year. Careful counselling produces high acceptability and continuation rates with this method.     

Natural IVF cycles may be desirable for women with repeated failures by stimulated IVF cycles

Purpose Although many reports support stimulated in vitro fertilization, several patients do not respond to it well. Furthermore, stimulated treatment could be associated with reduced ovarian response. We describe three successful cases involving patients of advanced age from whom dominant follicles were retrieved during the natural cycle. Materials and methods All patients had failed to bear children through stimulated in vitro fertilization. In case 1, a follicle was retrieved after a gonadotropin-releasing hormone agonist was used to induce luteinizing hormone surge. In cases 2 and 3, pregnancy was achieved via completely natural cycles. Results One embryo was transferred every 16 cycles. Ongoing pregnancy—defined as pregnancy progressing beyond gestation week 9—was established in three cycles. The patients successfully delivered and had uneventful neonatal courses. Conclusion Mature oocyte retrieval followed by natural rather than stimulated in vitro fertilization might be a potential treatment for patients of advanced age when stimulated in vitro fertilization has been repeatedly unsuccessful. Capsule We describe three successful pregnancies and deliveries achieved via natural IVF cycles: the patients were older than 37 years with repeated failures by stimulated IVF.     

富血小板血浆对体外培养条件下人真皮成纤维细胞增殖能力的影响

目的:探讨富血小板血浆(PRP)对人真皮成纤维细胞(hDFbs)在体外培养条件下增殖能力的影响,探讨PRP促进皮肤、黏膜伤口愈合的机制.方法:PRP和hDFbs来源于健康成年人,两次离心法制备PRP,倒置相差显微镜观察0、12.5%、25.0%、50.0%和100.0%PRP浓度作用下 hDFbs的增殖;免疫细胞化学检...     

鼻咽癌细胞中大蒜素抑制MAPK信号通路的作用机制研究

目的:探讨大蒜素导致鼻咽癌细胞G1/S期阻滞的分子机制。方法:采用MTT法测定细胞增殖活性;激酶活性分析测定MAPK激酶的活性;报道基因分析检测转录因子AP-1的转录活性;Western blot法检测细胞周期蛋白CyclinD1的表达水平。结果:大蒜素呈浓度依赖性抑制鼻咽癌细胞增殖,细胞的存活率从100%降为52.8%(50μg/mL),P=0.0068;检测50μg/mL大蒜素处理时MAPK激酶的活性,发现其活性仅为未处理组的42.92%,说明大蒜素抑制了MAPK激酶活性;基因分析显示在大蒜素作用下,转录因子AP-1的转录活性也呈浓度依赖性的降低,从6.3×103U降低到3.8×103U(50μg/mL),P=0.0089,受AP-1调节的G1/S期调节蛋白CyclinD1的相对表达水平也从100%下降为32.2%。结论:大蒜素通过抑制MAPK信号通路而抑制转录因子AP-1的活性,从而下调CyclinD1表达,导致细胞G1/S期阻滞。     

Analysis of Mechanical Properties Related to Fiber Length of Closed-Loop-Recycled Offcuts of a Thermoplastic Fiber Composites (Organo Sheets)

Increasing demand for energy-efficient means of transport has steadily intensified the trend towards lightweight components. Thermoplastic glass fiber composites (organo sheets) play a major role in the production of functional automotive components. Organo sheets are cut, shaped and functionalized by injection molding to produce hybrid components, such as those used in car door modules. The cutting process produces a considerable amount of production waste, which has thus far been thermally recycled. This study develops a closed mechanical recycling process and analyzes the different steps of the process. The offcuts were shredded using two shredding methods and implemented directly in the injection-molding process. Using tensile tests and impact bending tests, the material properties of the recycled materials were compared with the virgin material. In addition, fiber length degradation via the injection-molding process and the influence of the waterjet-cutting process on the mechanical properties are investigated. Recycled offcuts are both comparable to new material in terms of mechanical properties and usability, and are also economically and ecologically advantageous. Recycling polypropylene waste with glass fiber reinforcement in a closed loop is an effective way to reduce industrial waste in a sustainable and economical production process.