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find Keyword "测试" 37 results
  • Research progress of optical coherence tomography combined with microperimetry in diabetic macular edema

    Diabetic macular edema is the major cause of vision impairment in patients with non-proliferative diabetic retinopathy. Thickness and pathological alterations in each retina layer of diabetic macular edema (DME) patients can be performed by optical coherence tomography (OCT) device. And retinal light sensitivity at specific retinal point and fixation state can be detected by microperimetry qualitatively and quantitatively. Moreover, OCT can discover pathological anatomical changes in the retina of DME patients, thus facilitating the interpretation of the structure-function relationship in DME with combination of microperimetry results. At present, there are various therapies for DME patients, and the primary method in evaluating therapeutic efficacy is to compare the pathological changes in the retina before and after treatment by OCT. Besides, microperimetry can provide information in visual function restoration. The combined application of OCT and microperimetry has broad prospects in the diagnosis and treatment of DME patients.

    Release date:2018-07-23 04:02 Export PDF Favorites Scan
  • Current situation and influencing factors of anxiety and depression in patients with acute exacerbation of chronic obstructive pulmonary disease

    Objective To investigate the current situation of anxiety and depression in patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD) and analyze the related influencing factors. Methods A questionnaire survey was conducted among AECOPD patients admitted to the Department of Respiratory and Critical Care Medicine, the Second Affiliated Hospital of Anhui Medical University from August 2022 to October 2023. The survey included basic demographic information, anxiety and depression scores, quality of life and dyspnea symptoms in the AECOPD patients. The clinical data of patients in the electronic medical record system were also collected. According to the anxiety score or depression score, the patients were divided into an anxiety group and a non-anxiety group, or a depression group and a non-depression group. The indicators between two groups were compared and the influencing factors were analyzed. Results Among the 164 patients with AECOPD, 123 patients (75.0%) were complicated with anxiety, 125 patients (76.2%) were complicated with depression, and 105 patients (64.0%) were complicated with anxiety and depression. Education level, place of residence, monthly income, smoking index, and chronic obstructive pulmonary disease assessment test (CAT) score were associated with AECOPD and anxiety (P<0.05). Higher CAT score was an independent risk factor for anxiety in the patients with AECOPD. Residence, monthly income, smoking index, CAT score, modified British Medical Research Council (mMRC) dyspnea questionnaire rating, actual bicarbonate, neutrophilic granulocyte percentage (NEU%), lymphocyte percentage (LYM%), basophile percentage (BASO%), alkaline phosphatase, total carbon dioxide concentration, neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR) were associated with AECOPD and depression (P<0.05). Among them, higher CAT score and PLR value were independent risk factors of AECOPD and depression. Conclusion Anxiety and depression have higher prevalence in AECOPD patients, and the influencing factors include quality of life, dyspnea symptoms, education level, place of residence, monthly income, smoking index, acid base balance, NEU%, LYM%, BASO%, NLR和PLR, etc.

    Release date:2024-07-29 01:12 Export PDF Favorites Scan
  • 等速肌力测试和训练技术在我国康复医学领域应用现状

    【摘要】等速肌力测试与训练技术是目前国际上最先进的肌力测试、训练方法,在国际康复医学领域已有相当广泛的运用,并日益受到重视,但在国内的相关研究较少,查阅近年来国内有关等速技术的文章,总结分析等速技术在我国目前的应用现状。

    Release date:2016-08-26 02:21 Export PDF Favorites Scan
  • Testing System Design and Analysis for the Execution Units of Anti-thrombotic Device

    In an anti-thrombotic pressure circulatory device, relays and solenoid valves serve as core execution units. Thus the therapeutic efficacy and patient safety of the device will directly depend on their performance. A new type of testing system for relays and solenoid valves used in the anti-thrombotic device has been developed, which can test action response time and fatigue performance of relay and solenoid valve. PC, data acquisition card and test platform are used in this testing system based on human-computer interaction testing modules. The testing objectives are realized by using the virtual instrument technology, the high-speed data acquisition technology and reasonable software design. The two sets of the system made by relay and solenoid valve are tested. The results proved the universality and reliability of the testing system so that these relays and solenoid valves could be accurately used in the anti-thrombotic pressure circulatory equipment. The newly-developed testing system has a bright future in the aspects of promotion and application prospect.

    Release date:2021-06-24 10:16 Export PDF Favorites Scan
  • In vitro hydrodynamic performance testing of heart valve prosthesis and its clinical application

    The heart valve prosthesis must have excellent hydrodynamic performance which is usually tested in vitro, not in vivo. This paper comprehensively introduced the principles and methods of hydrodynamic performance in vitro testing, helping clinicians to understand valve performance parameters, evaluate valve applicability, and reduce clinical risk of the valve prosthesis. In vitro testing not only serves as the "gold standard" for valve prosthesis assessment, but also provides detailed data for design and optimization of the prosthesis. ISO 5840 defines the items and methods for valve in vitro testing, which consists of three parts: (1) pulsatile flow testing, which reproduces the pulsating flow of the valve prosthesis after implantation in the human body; (2) steady flow testing, which assesses valve forward flow resistance; (3) durability testing, which evaluates the durability of the valve prosthesis and determines the expected failure mode. In addition, the paper presented the differences between atrioventricular and aortic valve testing, the method of mitral valve testing, the differences between transcatheter and surgical valve testing, and the method of valve flow visualization.

    Release date:2022-03-18 02:44 Export PDF Favorites Scan
  • 护理干预对慢性阻塞性肺疾病患者生活质量的影响

    目的 探讨积极护理干预对慢性阻塞性肺疾病(COPD)患者生活质量的影响。 方法 将2010年6月-2011年12月收治的102例COPD患者随机分成两组,对照组进行常规的护理干预,试验组在常规护理干预的基础上进行系统、强化的护理干预,比较两组患者在干预后的咳嗽、咯痰、气短症状,肺功能、6 min步行距离(6MWD)及1年重复住院次数的变化情况。 结果 试验组较对照组患者的咳嗽、咯痰、气短症状减轻,痰量减少,肺功能、6MWD有显著性提高(P<0.05),1年重复住院次数减少(P<0.05)。 结论 全面系统的护理干预能够明显改善COPD患者的临床症状,减少住院次数,提高生活质量。

    Release date:2016-08-26 02:09 Export PDF Favorites Scan
  • Development of Muscle Strength Evaluating System Based on Mobile Platform

    The development of muscle strength evaluating system based on Android system was developed in this research. The system consists of a lower unit and an intelligent mobile terminal. The pressure sensor of the lower unit was used to collect muscle strength parameters. And the parameters were sent to the Android device through the wireless Bluetooth serial port. Then the Android device would send the parameters to the doctor monitored platform through the Internet. The system realized analyzing the muscle strength parameters and real-time displaying them. After it ran on the Android mobile phones, it showed an effective result which proved that the system combined with mobile platform could make more convenient for the patients to assess their own muscle strength. It also provided reliable data references for doctors to know the patients' rehabilitation condition and to make the next rehabilitation plan.

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  • Study on gait symmetry based on simulation and evaluation system of prosthesis gait

    A software and hardware platform for gait simulation and system evaluation for lower limb intelligent prosthesis is proposed and designed, in order that the wearable symmetry effect of the intelligent knee prosthesis can be quantitatively analyzed by machine test instead of human wear test. The whole-body three-dimensional gait and motion analysis system instrument, a device to collect gait data such as joint angle and stride of adults, was used for extracting simulated gait characteristic curve. Then, the gait curve was fitted based on the corresponding joint to verify the feasibility of the test platform in the experiment. Finally, the developed artificial knee prosthesis was worn on the prosthetic evaluation system to quantitatively analyze the gait symmetry effect. The results showed that there was no significant difference in gait symmetry between the developed knee joints at different speeds, which could reach more than 88%. The simulation and evaluation of the prosthetic gait have good effects on the functional simulation and evaluation of the lower limb intelligent prosthesis.

    Release date:2020-02-18 09:21 Export PDF Favorites Scan
  • Quantitative Evaluation of Regularity of Finger Tapping Movement for Patients with Parkinson's disease

    Finger tapping test is a common testing item for patients with Parkinson's disease (PD) in clinical neurology. It mainly evaluates the fine motor function of patient's hand in three aspects:amplitude, speed and regularity of the movement. This paper focused on the quantitative assessment of regularity of finger tapping movement for PD patients. The movement signals of thumb and index finger were recorded by using inertial sensor unit in the process of tapping test. Two nonlinear dynamic indexes, approximate entropy (ApEn) and sample entropy (SampEn), were calculated, and then the values were statistically analyzed. The experimental results indicated that both indexes had significant differences between patient group and control group. Moreover, the indexes had relatively high correlation with the scores of corresponding unified Parkinson's disease rating scale (UPDRS) item rated by clinical clinician, which illustrated that these two indexes could reflect the injury level of the repetitive finger movement. So, as a reliable method, it can be provided to the clinical evaluation of hand movement function for PD patients.

    Release date:2016-10-24 01:24 Export PDF Favorites Scan
  • Research of the training methods and structure design of intelligent knee prosthesis based on physiological gait

    The performance of intelligent prosthetic knee has an important effect on the realization of physiological gait of transfemoral amputees. A new type of single axis hydraulic damping knee prosthesis was designed based on the analysis of physiological gait. The training methods of the stance and swing phase were proposed. Knee prosthesis test was done through simulation and measurement device. The control target of peak flexion angle during swing of knee prosthesis is chosen to be 60–70°. When the damper valve closure was 0%, maximum swing-phase knee flexion angle of knee prosthesis were (86±2)°, (91±3)° and (97±3)° with the speed of 0.8 m/s, 1.2 m/s and 1.8 m/s, respectively. Once the valve closure was changed, maximum swing-phase knee flexion angle with different speeds could be adjusted between 60° and 70° and the required valve closure percentage were separately 25%, 40% and 70%. The damping adjustment law of intelligent knee prosthesis to achieve physiological gait was revealed.

    Release date:2018-10-19 03:21 Export PDF Favorites Scan
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