This article describes the turbidimetric methed of measuring sperm motility and its experimental apparatus. By this method, the sperm motilities of 10 rats have been measured. Its possible clinical applications are, mentioned

This article introduces a measurement circuit for Respiratory Mechanics Parameters which is based on differential pressure sensor. The circuit detects the flow and airway pressure signals from the sensors, then more than ten Respiratory Mechanics Parameters are identified. The system meets the clinical need of Respiratory Mechanics measurement, and improves the performance of domestic Patient Monitor.

In the bioelectric measurement, the electrode impedance detection is an important index to the signal quality evaluation and sensor electrode contact condition. In this paper, a method of accurately measuring the electrode impedance based on EEG measurement system was put forward, the method is based on the constant current source excitation signals which are added to the human body, by monitoring the human voltage to measure the electrode impedance. And different reference resistor calibration calculation in different sections was used to reduce the effect of constant current source on the precision of measurement results to improve the measurement accuracy.
Calibration ; Electric Impedance ; Electroencephalography

Anesthesia plays an essential role in clinical operations. Guiding anesthesia by EEG signals is one of the most promising methods at present and it has obtained good results. The analysis and process of the EEG signals in anesthesia can provide clean signal for further research. This paper used variance threshold method to remove the mutation fast and large interfering signals; and used notch filter to remove frequency interference, smoothing filter to remove baseline drift and Butterworth low-pass filter to remove high frequency noise at the same time. In addition to this, the translation invariant wavelet method to remove interference noise on the signals which was after the classical filter and retained non-stationary characteristics was used to evaluate parameter calculation. By comparing the calculated parameters from treated signal using this paper's methods and untreated signal and standard signal, the standard deviation and correlation has been improved, particularly the major parameters BetaR, which provides better signal for integration of multi-parameter to evaluate depth of anesthesia index for the latter.
Anesthesia ; methods ; Humans ; Signal Processing, Computer-Assisted

By studying of the pathology of human sleep and respiration disorder diseases, the method of sleep and respiration measurement, the evaluation index, a kind of micro sleep monitor and evaluation system was designed. Based on the methods of spectrum absorption and force changing, using high performance pulse oxygen saturation monitoring technology and respiration monitoring technology, developing a low-cost, high usability sleep monitor system which is convenience for family using. It can measure the signal of human oxygen saturation and chest respiration, can improve the quality of signal and reliable from arithmetic and sensor installing.
Humans ; Monitoring, Physiologic ; instrumentation ; methods ; Oximetry ; instrumentation ; methods ; Respiration ; Sleep ; physiology ; Software Design

Through the study of the pathology of sleep apnea-hypopnea syndrome, evaluation indexes, diagnosis requirements and so on, a portable sleep monitoring system was designed, which had the characteristics of convenience, wireless transmission and no disturbance. The system can be assessed by respiration monitoring and pulse oximetry, which is based on the pressure variation in miniature air-bag and spectral absorption method. It provides the value of the apnea-hypopnea index (AHI), which is used to evaluate OSAHS severity. The experiment of the system's stability and accuracy is done, which exhibits good performance, it can diagnose OSAHS effectively and provide convenience for home monitoring.
Humans ; Oximetry ; Polysomnography ; instrumentation ; Sleep Apnea, Obstructive ; diagnosis

Through various common domestic and foreign electronic sphygmomanometers to test blood pressure, we find that when measuring high blood pressure or low blood pressure, there is a mismatch between the maximum inflation pressure and the blood pressure measurement, which often results in repeatedly inflating and deflating as well as the problem of high inflation pressure. In order to solve these problems and find a suitable maximum inflation pressure, two intelligent pneumatic solutions based on identifying of pulse wave are suggested and 700 groups of blood pressure experiments are done, then the two solutions are verified by experiments. The experiment proved that these solutions proposed have good stability and accuracy, they can solve the problems appeared in measuring blood pressure effectively, at the same time, the second solution that estimate the maximum inflation pressure during inflation is considered as the best one.
Blood Pressure ; Blood Pressure Determination ; instrumentation ; Heart Rate ; Humans ; Hypertension ; Sphygmomanometers

This article introduces a method of thoracic impedance, evaluation indexes and evaluation method for the respiration monitoring, including the methods basing on lab testing and clinical database testing, it will provide a reference for improving the efficiency of respiration monitoring.
Databases, Factual ; Humans ; Monitoring, Physiologic ; instrumentation ; methods ; Respiration ; Respiratory Function Tests ; Respiratory Physiological Phenomena

The article introduces the clinical testing method for the product of patient monitor, the definition of direct measurement and indirect measurement method, and the different testing methods. The clinical testing methods for none invasive blood pressure, pulse oxygen saturation and ECG analysis have significant value, which are important solutions to test the safety and effectiveness of medical devices by using the equivalent analysis method. These methods above are also provided as reference for other medical devices' clinical testing.
Equipment Failure Analysis ; Equipment Safety ; Equipment and Supplies ; standards ; Humans

Cardiac output (CO) monitoring is a crucial part of the hemodynamic status monitoring. So far, thermodilution method, which is clinically recognized as the gold standard method to monitor cardiac output, still has irreplaceable advantages. This paper mainly introduces the use of platform for cardiac output measurement based on thermodilution method, mainly including three parts: the hardware platform, software design and algorithm process. A large amount of test data of this system has been got by CO simulator testing in the laboratory and preliminary clinical tests in the hospital. The testing result showed that using the proposed system can achieve good accuracy and repeatability.
Algorithms ; Cardiac Output ; Hemodynamics ; Humans ; Monitoring, Physiologic ; instrumentation ; methods ; Thermodilution