Objective:To develop a method for the simultaneous determination of vinyl chloride and vinylidenechloride in drug packaging materials containing polyvinyl chloride /polyvinylidene chloride by HS-GC.Methods: A Stabilwax (30.0 m ×0.25 mm, 0.25 μm) capillary column and an FID detector were adopted .The headspace equivalent temperature was 80℃for 30 min and the col-umn temperature was 40℃.The inlet temperature was 190℃and the detector temperature was 210℃.N2 was used as the carrier gas . The flow rate was 1.0 ml · min-1 .Results: Vinyl chloride had a good linear relationship within the range of 0.5-2.5 μg ( r =0.996 7), and the average recovery was 90.4%(RSD=0.9%, n=9).Vinylidenechloride had a good linear relationship within the range of 1.0-5.0 μg (r=0.999 0), and the average recovery was 90.0%(RSD=0.6%, n=9).Conclusion: The method is fast and accurate in the simultaneous determination of vinyl chloride and vinylidenechloride in drug packaging materials containing polyvinyl chloride/polyvinylidene chloride .

Based on the reality of Anhui Medical University,the paper analyzes the adverse factors of carrying out combination with teaching for the literature retrieval course from the perspectives of emphasis,professional knowledge structure and teachers of professional courses,and puts forward corresponding countermeasures from implementation of teaching and teaching effect,in order to provide reference for medical colleges to carry out literature retrieval course effectively.

Objective To compare effects between laparoscopy and laparotomy for the treament of ovarian endometriosis cysts and to investigate the value of laparoscopy in the treatment of ovarian endometriosis cysts. Methods We retrospectively analyzed 144 cases of ovarian endometriosis cysts,92 of which underwent laparoscopic operations(Laparoscopic Group) and 52 of which received open operations(Open Group).All the cases were followed for 4 months ~ 5 years.Results The operation time,postoperative hospital stay,and intraoperative blood loss were 69?41.8 min,3.5?1.0 d,and 55?12.0 ml in the Laparoscopic Group,respectively,and 137?54.3 min,8.7?3.5 d,and 178?105.9 ml in the Open Group,respectively,with significant differences between the two groups(t=-8.402,-11.048,and-13.350;P=0.000).There was no significant difference in the rate of abdominal pain relief between the Laparoscopic Group(66.0%,35/53) and the Open Group(52.8%,19/36)(?~2=1.580,(P=0.209)).The recurrent rate was 19.6%(18/92) in the Laparoscopic Group and 19.2%(10/52) in the Open Group,without significant difference between the two groups(?~2=0.002,P=0.961). Conclusions Laparoscopic surgery gives similar efficacy to open surgery in the treatment of ovarian endometriosis cysts.Laparoscopic surgery can be used as the first choice in treating ovarian endometriosis cysts because of its minimally invasive characteristics.

Objective:To discuss the appropriate thyroid operation for the treatment of bilateral multinodular goiter.Methods: 328 bilateral multinodular goiter patients undergoing surgery in the department of general surgery of Capital Medical University Beijing Tongren Hospital from June 2012 to June 2016. were retrospectively analyzed. Of these patients, 85 underwent hemithyroidectomy combined with contralateral nodule resection or subtotal resection and 243 underwent bilateral subtotal thyroidectomy. The rate of postoperative complications and recurrence between hemithyroidectomy combined with contralateral nodule resection or subtotal resection and bilateral subtotal thyroidectomy were compared.Results: The follow-up time was 1 month to 48 months after operations. In hemithyroidectomy combined with contralateral nodule resection or subtotal resection group 1 patient developed recurrent laryngeal nerve palsy, 2 patients had transient hypoparathyroidism and 1 patient had hematoma in the operative cavity. In bilateral subtotal thyroidectomy group, 2 patients developed recurrent laryngeal nerve palsy and 2 patients had subcutaneous hematoma. The rate of recurrent disease was 2.35%(2 patients) in hemithyroidectomy combined with contralateral nodule resection or subtotal resection group and 7%(17 patients) in bilateral subtotal thyroidectomy group. There was no patient in both groups needed reoperation.Conclusions:Hemithyroidectomy combined with contralateral nodule resection or subtotal resection had similar complication rate compared with bilateral subtotal thyroidectomy, but it had a significantly lower risk of recurrence than bilateral subtotal thyroidectomy, Furthermore, the rest one lobe could be resected for many times which would not cause severe complications. Hemithyroidectomy combined with contralateral nodule resection or subtotal resection is worthed to be recommended.

Adolescent ; Atherosclerosis ; drug therapy ; etiology ; prevention & control ; therapy ; Child ; Humans ; Hyperlipidemias ; complications ; prevention & control ; therapy ; Hypolipidemic Agents ; therapeutic use ; Life Style ; Obesity ; complications ; prevention & control ; Primary Prevention ; Risk Factors

Objective To study the effect of nonsteroidal anti-inflammatory drugs (NSAIDs) ,cy-clooxygenase-2 ( COX-2 ) inhibitor Piroxicam on the growth of colorectal cancer cells and to evaluate the preventive significance from COX-2 expression and apoptosis. Methods The cell growth of colorectal adenocar-cinoma cell line SW1116 was measured by MTT (3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyl tetrazolium bromide) assay, and COX-2 protein expression by Immunohistochemistry and Western Blot. Apoptosis was characterized by DNA fragmentation. Results The results showed that COX-2 inhibitor Piroxicam could restrain the proliferation of SW1116, which had positively related to its concentration. Concentration higher than 1. 0mmol/L showed cytotoxic effects. The inhibition of COX-2 by Piroxicam appeared within 12 hours, but COX-2 protein level recovered within 24 hours, its expression had negatively related to the concentration of Piroxicam. Apoptosis was induced in SW1116 culture with Piroxicam higher than 0. 1mmol/L. Conclusion It can be concluded that cell inhibition effect is associated with Piroxicam-mediated cell apoptosis and inhibition of COX-2 protein expression in SW1116 cell, because the effects of Piroxicam have the concentration and time dependence, in further clinical research its dosage and time of medication should be considered in preventing or treating colorectal cancer.

Right-sided cardiac valvular diseases have traditionally been considered less important than disease of mitral or aortic valve. However, severe tricuspid regurgitation could lead to right ventricle dysfunction and reduce patients' survival rate. In clinic setting, tricuspid valve disease should be paid more attention for patients with secondary tricuspid regurgitation caused by left-sided valvular surgery combined with irreversible annular dilatation increasing the risk of reoperation. In this review, we summarize the epidemiology, anatomy, pathology, diagnosis, ultrasound and cardiac magnetic resonance imaging findings in patients with tricuspid regurgitation.
Echocardiography ; Heart ; Heart Valve Diseases ; diagnosis ; Heart Ventricles ; diagnostic imaging ; pathology ; Humans ; Magnetic Resonance Imaging

OBJECTIVETo observe the efficacy of the treatment of refractory wound by VSD combined with platelet-rich plasma.

METHODSFrom April 2010 to June 2012,15 patients with refractory wound were treated including 11 males and 4 females with an average age of 35.2 years old ranging from 18 to 45 years old. The formation time of wound was from 6 to 24 months, which was unhealed after long-term medication or repeated treatment. The VSD combined with autologous platelet-rich plasma was applied to treat the wound. The wound healing was an indicator and treatment and clinical features were summarized.

RESULTSAll the patients were followed up for 3 to 8 months (means 5 months). The wound of all patients were healed without recurrence.

CONCLUSIONThe curative effect of VSD combined with platelet rich plasma for treatment of refractory wounds is obvious. It could reduce the treatment course and the treatment cost.

Adolescent ; Adult ; Drainage ; methods ; Female ; Humans ; Male ; Middle Aged ; Negative-Pressure Wound Therapy ; methods ; Platelet-Rich Plasma ; metabolism ; Wound Healing ; Wounds and Injuries ; metabolism ; physiopathology ; therapy ; Young Adult

Objective The activity and cyclooxygenase (COX-2) protein expression of colorectal adenoc arcinoma cell treated by deoxycholic acids (DCA) were examined in order to find out the carcinogenesis mechanism of DCA. Methods The proliferation of colorectal cancer cells (SW 1116) was detected by MTT metho d . COX-2 protein expression was measured by immunohistochemistry and Western blo t. Results DCA lower than 100 ?mol/L concentration can stimulate the growth of the adenoca rcinoma cells with effect reversible, while higher concentration shows the long -acting effect of inhibition. DCA of 10,50 and 100 ?mol/L concentration can up -regulate the expression of COX-2 in cells, while only 10 ?mol/L can maintain this effect long than 72 hours. The level of COX-2 protein treated by the late r two concentration descends after 48 hours. Conclusion DCA affects the proliferation of SW1116 in two sides. D CA concentration lower than 100 ?mol/L can promote COX-2 protein expression, w hich may be the mechanism of its carcinogenesis.

0.05). Conclusions The distribution of the RMSh was widely ranged among hyperopic children,and some children expressed higher value of RMSh. As the pupil diameter got larger,the RMS value of HOA significantly increased. Vertical coma was more frequent dominating type of HOA among hyperopic children. (Ophthalmol CHN ,2006,15: 187-190)