Objective To develop an electronic infusion alarm system with low cost and high safety and reliability.Methods The system was composed of modules of sensor, control, alarm and DC power supply. The integrated operational amplifier was used to amplify the voltage signals from the cantilever sensor, and NE555 timer controlled the system give out alarm when 10% liquid remained in the bottle.Results The system could alarm when 10% liquid remained in the bottle, and three gears were designed for the common infusion bottles in the market.Conclusion The system is easy to operate and maintain, and thus can be popularized in all hospitals and clinics.

Objective To characterize social-perceptual component and social-cognitive component of theory of mind(TOM) in patients with Parkinson's disease.Methods A total of 19 patients with idiopathic PD and 20 demographic-matched health subjects were included in this study.They were assessed by using Reading the Mind in the Eyes and Faux Pas task involving ToM socialperceptual component and social-cognitive component.The severity of PD was assessed by the Hoehn and Yahr scale.Results Significant difference was found between PD group and health controls in task involving ToM social-perceptual component (mind Reading:17.1 ± 3.1 vs.30.4 ± 1.7,F =278.756,P＜ 0.001),test involving social-cognitive component (Faux Pas Questions:29.0 ± 4.0 vs.41.2±4.4,F=81.647,P＜0.001).While the ability to identify sex and control questions of the Faux Pas showed no significant difference as compared to health controls group (F=3.508,P=0.069;F=1.063,P =0.309).Conclusions The ToM social-perceptual component and social-cognitive component are both impaired in patients with Parkinson's disease.

Objective To investigate the characteristics of the executive function and working memory in patients with mild cognitive impairment (MCI), and the relations between working memory and executive function and the effects of working memory on patient' s daily functioning.Methods Thirty patients with MCI and 30 healthy elderly subjects were tested with a wide neuropsychoingical battery of tests including those of executive function, working memory and other cognition domain tests.Executive function was evaluated by using the verbal fluency test (VFT), color trail test (CTT), digital span (DS).Results The results showed the presence of significant executive function and working memory impairment in MCI patients as compared with the healthy controls.The scores of executive function test in MCI patients were decreased significantly in CTT (130.8±58.2 vs 52.0±13.5), CTT-B (210.2±81.8 vs 121.0±33.4),DS (3.4±0.9 vs 4.2±1.1), VFT (8.9±5.4 vs 16.4±5.4) and visuo-objective working memory (0.73±0.12 vs 0.85±9.18) respectively (t = 7.108, 5.159,-2.544,-4.879, and-4.351, all P <0.01 or P < 0.05) .In the stepwise liner regression analysis objective working memory test made a significant independent contribution to ADL (β =-0.720, t =-3.571, P < 0.01).Conclusion The patients with MCI have the deficit in executive function and working memory.Visuo-objective working memory is closely correlated with general cognitive function such as daily function, resulting in daily function decline.

Objective To characterize social-perceptual component and social-cognitive component of theory of mind in patients with Parkinson's disease.Methods A total of 19 patients with idiopathic PD and 20 demographic-matched health subjects were included in this study.They were assessed using Reading the Mind in the Eyes and faux pas task involving ToM social-perceptual component and social-cognitive component.The severity of PD was assessed on the Hoehn and Yahr scale.Results Significant difference was found between PD group and health controls on task involving ToM social-perceptual component (mind Reading:17.1 ± 3.1 vs.30.4 ± 1.7,F=278.756,P ＜0.001),test involving social-cognitive component (Faux pas Questions:29.0± 4.0 vs.41.2 ± 4.4,F =81.647,P＜0.001).While the ability to identify sex and control questions of the faux pas showed no significant difference compared to health controls group (F =3.508,P =0.069 ; F =1.063,P =0.309).Conclusions The ToM social-perceptual component and social-cognitive component are both impaired in patients with Parkinson's disease.

Objective To study the expression of KAI1 and CD40 in gastric cancer and their correlation with clinicopathologic features and prognosis.Methods The expression of KAI1 and CD40 of 64 gastric cancer tissues was examinated by S-P immunohistochemieal methods.Results The overall positive rate of KAI1 was 22% in gastric cancer.Expression of KAI1 was positively related to the degree of tumor differentiation,it was negatively related to invasion depth and lymph node metastasis and the tumor clinical stage.The 5-year survival rate of cases with positive expression of KAII was significantly higher than that of cases with negative expression(X~2=42.426,P=0.000).The expression rate of CD40 in gastric cancer tissue was 34%.The expression of CD40 was significantly correlated with metastasis and clinical stage of gastric cancer.The 5-year survival rate of cases with positive expression of CD40 was significantly lower than that of cases with negative expression(X~2=4.841,P=0.028).There is no relationship between KAI1 and CD40 expression in gastric cancer.Conclusion KAI1 is associated with gastric cancer differentiation,invasion and metastasis.CD40 status helps to evaluate metastasis,and predict prognosis of gastric cancer.

Acute Disease ; Humans ; Lumbar Vertebrae ; Male ; Middle Aged ; Osteochondroma ; diagnosis ; pathology ; therapy ; Spinal Neoplasms ; diagnosis ; pathology ; therapy

With the continuous development of bone tissue engineering, a variety of emerging bone graft materials provided various methods for repairing bone defects. Early and rapid accomplishment of revascularization of materials interior after implantation of bone transplantation materials is a difficulty faced to bone tissue engineering. Blood vessels ingrowth provides the requisite netritional support for the regeneration reconstruction of bone tissue, for this reason, vascularization plays a significant role in bone tissue engineering. However,there is not a golden standard strategy of vascularization at present. Scaffold materials, cells and growth factors still are three indispensable elements in tissue engineering, and are cardinal points of the promoting vascularization strategies. Multiple growth factors or multiple cells combined with scaffolds, which are hot spots, have obtained excellent vascularization. This review focused on the comprehensive strategies for promoting the successful vascularization of tissue engineered scaffolds.
Bone and Bones ; blood supply ; Humans ; Neovascularization, Physiologic ; Tissue Engineering ; methods ; Tissue Scaffolds

Background How to control progression of myopia is a central issue in clinical optometry.Some clinical trials showed that wearing base-in (BI) prism can slow down progression of myopia to certain degree.However,whether BI prism or base-out (BO) prism should be used is worth discussing.Objective This study was to investigate the influences of different prisms on accommodative response and microfluctuation in emmetropias.Methods This clinical trail was approved by Ethic Committee of Peking University People's Hospital.During July in 2014,twenty-two emmetropias of 22 normal volunteers aged 21-27 years were recruited from Peking University People's Hospital under the written informed consent.An open-field infrared refractometer was used to monitor and record pupil diameter and accommodative response under three conditions including non-prism,3△ BI prism,and 3△ BO prism.The accommodative response value was calculated as the difference between reading value and-3.0 D,and root mean square (RMS) of accommodative response value served as amplitude of accommodative microfluctuation.Spectrum of accommodative response was analyzed by one dimension discrete Fourier transformation.The differences of accommodative response value,amplitude of accommodative microfluctuation and pupil diameter among three conditions were compared using repeated one-way ANOVA.Results The accommodative response values were (+0.31±0.78),(+0.51±0.75) and (+0.18±0.72) D under the non-prism,3△BI prism and 3△BO prismconditions,respectively,with a significant difference among them (F =28.078,P =0.000),and compared with the non-prism condition,the accommodative lag of 3△BI prism condition was increased and that of 3△BO prism condition was reduced (P =0.000,0.012).No significant difference was found in the amplitude of accommodative microfluctuation among the three conditions (F=0.062,P =0.879).The percentages of low frequency signal power (0-0.5 Hz)/total power (0-2.5 Hz) was 97.5％,98.3％ and 91.4％ under the non-prism,3△BI prism and 3△BO prism condition,respectively.The pupil diameter was (5.37-±0.69) mm under the 3 △ BI prism condition,which was larger than (5.07±0.66) mm under the non-prism condition and (5.01 ±0.69) mm under the 3△ BO prism condition (both at P =0.000).Conclusions Compared with wearing 3△ BI prism,wearing 3△ BO prism lessens the accommodative lag,decreases the pupil diameter and reduces the power of low frequency component in accommodative response.

The intracellular trafficking and subcellular distribution of exogenous gene is very important for gene delivery. A successful gene vehicle should overcome various barriers including endosomal membrane barriers to delivery gene to the target organelle. Traditional nonviral vehicle is unable to avoid endosomal pathway efficiently, so the efficiency of gene delivery is low and the application of gene drugs is limited. In order to achieve efficient nonviral gene delivery, a lot of researches based on endosomal escape have been carried out and some agents with the function of endsomal escape have been found. These agents facilitate the endsomal escape via various mechanisms, such as fusion into the lipid bilayer of endosomes, pore formation in the endosomal membrane, proton sponge effect and photochemical methods to rupture the endosomal membrane. In this review, various reported strategies for endsomal escape are described according to the escape mechanisms, and their applications in intracellular gene delivery are also discussed.
Cell Membrane ; metabolism ; Endosomes ; metabolism ; Gene Transfer Techniques ; Genetic Therapy ; Genetic Vectors ; Humans

Objective: To investigate the short term clinical efifcacy of endovascular repair for complicated acute type Stanford B aortic dissection.
Methods: To retrospectively analyze the clinical data of 36 patients with complicated acute type Stanford B aortic dissection who received endovascular repair in our hospital from 2010-01 to 2014-06 including operational procedure and post-operative follow-up of CT angiography. There were 27 male and 9 female patients with the average age of 43.7 years (41-62) years.
Results: Successful operations were conducted in all 36 patients. 22 patients received endovascular repair combined with covering left subclavian artery (LSA),10 received endovascular repair combined with chimney technique, 2 received endovascular repair combined with vascular prosthesis bypass from left common carotid artery to LSA, 2 received endovascular repair combined with vascular prosthesis bypass from right common carotid artery to left common carotid artery, whose proximal parts were ligated. Viscera artery and lower extremity artery supply were restored gradually. No complication of endoleak occurred. There 30/36 (83.33%) patients were followed-up for 1 year, and 10 patients developed thrombus in full false lumen and 20 developed thrombus in partial false lumen after 1 year. Compared with pre-operative values, thoracic aortic true lumen volume increased in either thrombus in full false lumen (190 ± 68.7) ml vs, (125.3 ± 63.4) ml and thrombus in partial false lumen (166.2 ± 71.8) ml vs (110.1 ± 62.7) ml,P<0.001; thoracic aortic false lumen volume decreased (65.0 ± 67.4) ml vs (185.3 ± 66.6) ml and (132.3 ± 62.6) ml vs (224.5 ± 72.3) ml,P<0.001. Compared with pre-operative values, for patients with thrombus in full false lumen, the abdominal aortic true lumen volume increased (55.5 ± 12.4) ml vs (48.6 ± 12.2) ml,P<0.01; for patients with thrombus in partial false lumen, the abdominal aortic false lumen volume also increased (58.2 ± 21.5) ml vs (42.5 ± 18.5) ml,P<0.01.
Conclusion: For endovascular repair of complicated aortic dissection, covering LSA with chimney technique and hybrid operation of small incision could extend anchor zone and expand the range of endovascular repair which may improve the effect and reduce the complication for good short term effect.