AIM: To evaluate the safety and tolerance of ibandronate in Chinese healthy volunteers. METHODS: The trial protocol was designed according to the Good Clinical Practice(GCP). After physical examination and laboratory tests were performed, 36 healthy volunteers were divided randomly into 6 dose groups, including 1 mg , 2 mg , 3 mg , 4 mg , 5 mg and 6 mg , with 6 subjects in each group(3 male and 3 female). Clinical symptoms, vital signs, routine blood tests, routine urine tests, hepatic function, renal function, blood electrolytes, electrocardiogram, and electroencephalogram were observed or examined before and after a single intravenous infusion of ibandronate. RESULTS: After single intravenous infusion doses of 1- 6 mg , the vital signs, clinical symptoms and laboratory tests were all in the normal range, but there were some slight ADRs concerned with the drug, such as hypophosphataemia, increased body temperature, perspiring,pain of bone or muscle and hypocalcaemia. But the ADRs were found vanishing in one or two weeks. CONCLUSION: Single intravenous infusion (up to 6 mg ) of domestic ibandronate in 36 chinese healthy volunteers is safe and tolerable.

Objective To study the application of walking combined with Buerger exercise in the treatment of grade 0 diabetic foot.Methods Eighty patients with grade 0 diabetic foot were randomly divided into observation group and control group.The control group was trained by walking exercise .The observation group was trained by walking combined with Buerger exercise through 12 months of training.The changes of self-sensory symptoms,ABI and DAWV were observed.Results The self-sensory symptoms of the two groups were significantly decreased (observation group: markedly effective 15 cases,effective 19 cases;control group: markedly effective 5 cases,effective 23 cases).The effective rate of the observation group was higher than that of the control group (85% vs.70%,χ2 =7.831,P <0.05).The ABI ratio of the two groups were higher than those before treatment ,and the ABI ratio of the observation group was higher than that of the control group [(0.889 ±0.113) vs.(0.842 ±0.124),t =1.772 P <0.05].The ratio of DAWV in the observation group was higher than that in the control group [(6.772 ±0.435)cm/s vs.(6.543 ±0.552)cm/s,t =2.061,P <0.05].Conclusion Walking combined with Buerger exercise can improve the blood flow velocity and blood flow of the collateral circulation of the lower limbs of patients with grade 0 diabetic foot,and improve the self-sensory symptoms of peripheral neuropathy .

Objective: To understand the infectious disease prevention and control among primary and secondary schools in Hebei Province from 2019 to 2021 and to provide a scientific basis for promoting epidemic prevention and control in schools. Methods: Relevant indicators of infectious disease prevention and control in primary and secondary schools were collected and screened from the on site supervision and inspection data uploaded from various places, and analyzed with SPSS 22.0 software. Results: The qualified rates of infectious disease prevention and control in primary and secondary schools in Hebei Province from 2019 to 2021 were 77.11%, 89.74% and 96.24%, respectively, the difference was statistically significant( χ 2=455.45, P <0.01). The qualified rates of infectious disease prevention and control in primary schools, middle schools and high schools from 2019 to 2021 increased by year, the difference was statistically significant( χ 2=319.49, 118.74, 25.73, P <0.05). The qualified rates of six infectious disease prevention and control indicators such as morning inspection record, special person responsible for epidemic report, registration record of absence due to illness increased by year, the difference was statistically significant( χ 2=140.34, 9.10, 113.55 , 163.71 , 286.74, 329.18, P <0.05). Conclusion Steady improvement in school infectious disease prevention and control has been observed, while qualification rate in primary school and rural area still need to be improved, with missing or late report. Government support and talent policy, hardware and sofeware construction, as management level should be strengthened.

Objective To investigate the effect of the typical task teaching method on nursing education in the department of cardiology .Methods Eighty-seven nurse interns in 2012 and ninety nurse interns in 2013 were selected and divided into the control group and the observation group .The control group was given the traditional teaching method and the observation group was given the typical task teaching method .According to the specialized subjects characteristic , the acute myocardial infarction , acute left heart failure , arrhythmia diseases combined with ECG monitoring , cardiopulmonary resuscitation and oxygen inhalation technique were identified as the typical work tasks for the department of cardiology .The “clinical ability of nursing students evaluation questionnaire” was used to analyze and compared the teaching effects of the two groups of nursing students.Results The scores of practice ability, communication ability, health education, nursing management, nursing scientific research and the total score in the observation group were (52.38 ±10.64), (42.52 ±8.54), (20.45 ±4.28), (35.22 ±8.35), (17.48 ±5.44) and (195.08 ±43.68), respectively, which were significantly higher than (41.57 ±10.50), (35.12 ±8.02), (14.49 ±3.36), (28.45 ±8.67), (12.16 ±3.84) and (156.02 ±39.42) in the control group ( t=6.801, 5.938, 10.336, 5.292, 7.493, 6.239, respectively;P<0.05).Conclusions The typical task teaching method can effectively improve the clinical ability of nursing students in the department of cardiology .It is necessary to be promoted in the nursing education .

Objective To explore the key points of preoperative emergency nursing in the patients with mechanical pros thetic valve dysfunction .Methods The clinical data from five patients with mechanical prosthetic valve dysfunction from March 2010 to November 2012 were retrospectively analyzed , and the key points of preoperative emergency nursing were summarized in the course of the disease .Results Four patients were recovered and discharged after they got the positive and effective rescue and accepted the valve replacement operation;one patient gave up further treatment because of serious condition .Conclusions The mechanical prosthetic valve dysfunction can lead to acute hemodynamic instability and eventually cause death of patients , and the valve replacement operation as the effective treatment should be carried out as early as possible .The preoperative intensive monitor and targeted emergency nursing can help patients to win the operative time and increase the chance of survival .

Objective To investigate the application of resistive exercise combined with Buerger exercise in lower extremity vascular disease of type 2 diabetes mellitus .Methods According to the order of admission ,120 type 2 diabetes mellitus patients with lower extremity vascular disease were randomly divided into resistance exercise group ,Buerger exercise group and combined exercise group ,with 40 cases in each group .The resistance exercise group was given resistance exercise ,the Buerger exercise group was given Buerger exercise ,and the combined exercise group was given resistance exercise combined with Buerger movement .The changes of self -inductance ,ABI and DAWV of the three groups were observed .Results The clinical symptoms of the three groups were significantly reduced ( the resistance exercise group:markedly effective in 10 cases,effective in 14 cases;the Burger exercise group:markedly effective in 15 cases,effective in 17 cases;the combined exercise group: markedly effective in 22 cases,effective in 13 cases),the effective rate of the combined exercise group was higher than that of the resistance exercise group and Buerger exercise group ( the resistance exercise group:60.0％;the Burger exercise group:80.0％;the combined exercise group:87.5％,χ2 =11.333,P <0.05).The ABI of the three groups were higher than those before treatment,and the ABI ratio of the combined exercise group [(0.933 ±0.113)]was higher than that of the resistance exercise group[(0.866 ±0.112)] and the Buerger exercise group[(0.888 ±0.111)](t=1.796,2.663,all P<0.05 ) .The DAWV of the three groups increased compared with those before treatment , and the DAWV of the combined exercise group[(7.023 ±0.535)cm/s]was higher than that of the resistance exercise group [(6.633 ± 0.552)cm/s] and the Buerger exercise group [(6.772 ±0.435) cm/s] (t =2.302,3.209,all P <0.05). Conclusion Resistant exercise combined with Buerger exercise is helpful to improve the blood flow velocity and blood flow in the lower extremity vessel of patients with diabetic lower limb vascular disease , and can improve the self-sensitization symptoms of peripheral neuropathy in patients .

Most α2-AR agonists derived from dexme-detomidine have few structure differences between them and have no selectivity for α2A/2B-AR or Gi/Gs,that can lead to the side effect of drugs.To get novel and potent α2A-AR agonists,we built the homology model for human α 2A-AR and α2B-AR to find α2A-AR agonists with higher selectivity.Compound P300-2342 and its 3 analogs sig-nificantly decreased the locomotor activity of mice(P＜0.05).Furthermore,P300-2342 and its 3 analogs inhibited the binding of[3H]rauwolscine to α 2A-AR and α 2B-AR respectively.In α2A-AR-HEK293 cells,P300-2342 decre-ased forskolinstimulatedcAMPpruductionwithoutincreas-ing cAMP pruduction,that indicated the P300-2342 acti-vating α2A-AR coupling with Gαi/o pathway without Gαs coupling.P300-2342 had no agonistic and antagonistic activities on α 2B-AR.Similar results were shown in 3 analogs of P300-2342.The docking results showed that P300-2342 formed the π-hydrogen bonds with Y394,V114 of α2A-AR,and with V93 of α2B-AR.3 analogs of P300-2342 formed several π-hydrogen bonds with V114,Y196,F390 of α 2A-AR and with V93 of α 2B-AR.We believe that these molecules can serve as leads for fur-ther optimization of α2A-AR agonists with potentially few side effects.

Objective To explore the impact of intensive follow-up visit in patients with nonvalvular atrial fibrillation taking Warfarin in process of anticoagulant therapy. Methods A total of 100 patients with persistent nonvalvular atrial fibrillation were randomly divided them into intensive follow-up group and regular follow-up group on average. We compared the treatment compliance, INR value, embolism and hemorrhage between two groups. Results The INR qualified rate was 86. 0% after 6 months taking medication in the intensive follow-up group and 72. 0% in the regular follow-up group (χ2 =4. 570,P<0. 05). The incidence rate of hemorrhage was 12% in the intensive follow-up group and 28% in the regular follow-up group (χ2 =4. 000,P<0. 05). Conclusions With the function of propaganda, education, supervision, promotion and attention on patients, follow-up visit makes patients taking Warfarin receive normative, effective anticoagulant treatment and improves the safety of medicine use, thus the effect of preventing stroke can be achieved.