Simple oxygenation respirator is mainly used for respiratory failure patients who are failed in being treated with open positive pressure.It can markedly improve the oxygenation concentration and ventilation.Most respiratory failure patients can avoid using mechanical respirator if it is used adequately.Respiratory model Ⅰ,Ⅱ,Ⅲ can be applied according to different type of respiratory failure respectively.It is also very effective to cerebral vascular diseases.The structure of respirator is fit for human physiology without interfering cardiac and pulmonary functions.It has no contraindications and side effect.It is simple,cheap and practical.

Objective: To investigate the application of one stage otoptasty for congenital atresia of the external acoustic canal and malformations of the middle ear and the auricle. Method: patients with the ear malformations were given surgical reconstruction of one stage otoplasty. The auricle was reconstructed with the rib which was encapsuled with the superthin temporal flap. According to the malformations of the middle ear in patients, Ⅰ style tympanoplasty and Ⅲ style tympanoplasty were carried out respectively. All patients were performed myringoplasty with temporal fascia and reconstructed the external acoustic canal with full thickness skin-grafting. Result:A long term follow-up (4～6 years)demonstrated that 11 ears were survival of which 8 ears figuration were ideal. The hearing improvement was observed in all patients. Conclusion:one stage otoplasty is effective for treatment of the congenital malformations of the external and middle ear.

Objective To explore effect of integrated health education on hospitalized patients with Parkinson disease.Methods A total of 80 patients with Parkinson's disease were randomly divided into two groups.The control group was given traditional health education model and the experimental group received integrated health education model.Emotional problems,compliance,knowledge awareness and disease response attitude before and after intervention were compared.Results Compared with the control group,the SAS and SDS scores in the experimental group were significantly lower,and the compliance was significantly better than the in the control group (P ＜ 0.05).Awareness rate of disease concept,clinical symptom,treatment time,risk factors,treatment measures,treatment and prevention was significantly higher than that of the control group (P ＜ 0.05),the attitude to disease treatment,social participation,risk factors and emergency treatment were significantly higher than that of the control group (P ＜ 0.05).Conclusion The integrated health education model has significant effect in Parkinson's disease patients.

Objective To explore effect of integrated health education on hospitalized patients with Parkinson disease.Methods A total of 80 patients with Parkinson's disease were randomly divided into two groups.The control group was given traditional health education model and the experimental group received integrated health education model.Emotional problems,compliance,knowledge awareness and disease response attitude before and after intervention were compared.Results Compared with the control group,the SAS and SDS scores in the experimental group were significantly lower,and the compliance was significantly better than the in the control group (P ＜ 0.05).Awareness rate of disease concept,clinical symptom,treatment time,risk factors,treatment measures,treatment and prevention was significantly higher than that of the control group (P ＜ 0.05),the attitude to disease treatment,social participation,risk factors and emergency treatment were significantly higher than that of the control group (P ＜ 0.05).Conclusion The integrated health education model has significant effect in Parkinson's disease patients.

Objective To compare and analyze the relationship between geometric parameters of the needle of different insulin pens and their puncture force, flow rate, and pressing force. Methods The human skin tissue model and needle model were established, and the finite element simulation analysis of needle puncture was performed. Using a test platform, 25 kinds of needles with different geometric parameters were tested for the puncture force, pushing pressure, flow rate and other parameters. The influence of geometric parameters on the performance of the needles were analyzed. Results The puncture force of the needle was closely related to its section design. Compared with the three-section needle, the five-section needle increases the secondary inclination angle and the condyle angle, increases the contact area between the needle and the tissue, and make the change of the contact angle more smoothly, which reduce the needle penetration force. The smaller the outer diameter of the needle, the smaller the penetrating power. The larger the inner diameter of the needle, the greater the fluid flow rate, the smaller the pushing pressure, and the higher the injection accuracy. Conclusions Five-section, ultra-thin-walled or ultra-thin-walled needles have more excellent performance. On the basis of ensuring the strength of the needle, the needle's geometry can be optimized to reduce the puncture force. The results of this study can provide theoretical basis and experimental basis for the design of needles for insulin pens.

Objective　To analyze the efficacy,safety and pharmacological mechanism of butylphthalide in patients with rt-PA intravenous thrombolytic stroke.Methods　Patients were divided into rt-PA+butylphthalide injection treatment group (n=124) and rt-PA+0.9% normal saline control group (n=75).We compared the baseline and clinical parameters such as the National Institute of Health stroke scale (NIHSS) score,Transcranial Dopple monitor mean flow velocity (Vm) and Pulse Index (PI) of the middle cerebral artery and serum levels of Matrix metalloprotein-9 (MMP-9) at 24 hours,7 days,and 14 days after treatment between the two groups.Modified Rankin Scale (mRS) scores were compared between the two groups after ninety-days of treatment.Results　The NIHSS score and MMP-9 in the treatment group were significantly lower than those in the control group (P<0.05);the Vm and PI of the middle cerebral artery in the treatment group were significantly higher than those in the control group (P<0.05).The mRS score in the treatment group was 93.0%,and the difference was statistically significant (P<0.05).Conclusion　Butyphthalide combined with alteplase helps to improve the clinical efficacy and prognosis of patients without increasing the incidence and mortality of adverse reactions and its mechanism may be related to the reduction of MMP-9 level in serum.

Objective To establish the pushing transmission model of tendon-sheath system (TSS) for endoscopic flexible instrument, and study the key influencing factors of transmission efficiency. Methods The force and displacement transmission models of TSS in pushing configuration were built and simulated. The tendon-sheath transmission testing platform was designed to validate the model. The influencing factors, such as transmission velocity, tendon-sheath diameter ratio, curvature radius, were explored using this setup. Results There were obvious nonlinear phenomenon in force and displacement transmission. The model simulation results accorded quite well with the experiment results. Transmission velocity, tendon-sheath diameter ratio, curvature radius all had great effects on pushing force transmission of endoscopic flexible instrument, while they had a smaller effect on displacement transmission. Conclusions The proposed model can be used for calculating pushing force transmission of tendon-sheath system for endoscopic flexible instrument, so as to provide the doctors with force feedback at the tip of the end effector, and ensure the safe operation and improve the surgical effects. For better design and control of endoscopic flexible instrument, the transmission velocity, tendon-sheath diameter ratio, curvature radius must be comprehensively considered.

Objective To develop a new type of electric stapler, so as to solve the problems of insufficient rotation angle, inconvenient operation and difficulty in controlling the pressing strength of existing products. Methods An electric stapler was designed and manufactured. The motion trajectory curve of the prototype was measured by using the three-coordinate imaging instrument to build functional test platform of the prototype, and the goodness of fit was used to evaluate consistency between the theoretical curve and the measured curve. The small intestine tissues of fresh pig were anastomosed at different bending angles of the front end, and the forming rate of the anastomotic stoma was measured. Results The goodness of fit between the test curve and the theoretical curve for both turning motion and shooting motion was ideal, while the goodness of fit between the test curve and the theoretical curve for pressing motion was not ideal when the turning joint was bent at 0°-30°, and was ideal when it was bent at 45°-60°. In performance test, the deformity rate of the nail was smaller than 1.14%, indicating that the bending angle had no significant impacts on the anastomotic effect. Conclusions The kinematics curves of shooting motion and turning motion are consistent with the theoretical curves. The pressing motion curves fluctuate at different bending angles, which will not affect the anastomotic effect, and the effect of the electric stapler meets the clinical requirements.

Objective To design a notched flexible articulation applied to electric stapler and study its turning performance. Methods The notched flexible articulation was designed and modeled. The kinematics and statics models of the articulation were established for simulation calculations. The stress, deflection angle, top displacement and driving force of the articulation with 3 different turning structures were studied under equal and variable stiffness of symmetrical notches by using finite element simulation. An experimental platform for performance test of the turning structure was built to verify the simulation results and the model. Results The theoretical model of the turning structure in bending process was basically consistent with the experimental results. With the optimization of symmetrical notch stiffness, the maximum stress of the articulation with variable stiffness was reduced by 20.64% and 39.20%, respectively. The articulation with variable stiffness required the smallest tensile force during bending, which was 33.41% lower than that of the articulation with equal stiffness, and the tip displacement (30.8 mm) along the bending plane was the smallest. The maximum deflection angle for the articulation with 3 different turning structures all could reach 90°. Conclusions The kinematics and statics models of the articulation can be used for the calculation of its tensile force and position changes. The turning performance of the articulation with variable stiffness using symmetrical notch is better than that with equal stiffness. The notched flexible articulation meets the design requirements and the turning needs of electric stapler.