This article introduces a method of practical noninvasive blood pressure measurement techniques and its key technical points from the view of products , and it gives detailed requirements for us to evaluate the efficiency of these techniques, The evaluation results are presented here by the testing examples guiding us to a correct evaluation of noninvasive blood pressure measurement techniques.
Blood Pressure Determination ; instrumentation ; methods

The circuit of a monitoring system for respiratory mechanical parameters is designed based on the detection of respiratory flow and pressure. Breaking through the restrictions of traditional methods that can only monitor respiratory rate, this design is able to monitor more than 10 respiratory parameters simultaneously and thus provides a good technical support for improving the properties of homemade monitors.
Airway Resistance ; Computer Simulation ; Computers ; Equipment Design ; Humans ; Monitoring, Physiologic ; instrumentation ; methods ; Respiratory Mechanics ; Software Design ; Therapy, Computer-Assisted ; instrumentation ; methods ; Transducers

This article introduces a measuring method for invasive blood pressure based on SecWave technology and a testing method of effectiveness based on IBP database and simulator. Besides, quantified indexes are set out for the accuracy evaluation, such as static pressure accuracy, accuracy of dynamic pressure pulse wave recognition, pulse rate and the response time, so as to provide an important reference method of effectively objective evaluation for invasive blood pressure measurements.
Algorithms ; Automatic Data Processing ; methods ; Blood Pressure Determination ; instrumentation ; methods ; Humans

OBJECTIVETo study the hypoglycemic effect of the extract of B. polyandra (SHG).

METHODThe diabetic mice were induced by alloxan in ICR mice. The blood glucose concentration was measured by glucose oxidase method. The serum insulin level was determined by 125I-insulin radioimmunoassay kit. The hypoglycemic effect was evaluated by the levels of both fasting and no-fasting blood glucose. The effect on serum insulin level was estimated by the values of the blood insulin and the changes of the blood glucose induced by the glucose intraperitoneal injection. The effect on the glucose absorption was investigated by the oral sucrose or starch tolerance test.

RESULTBoth of the fasting and no-fasting blood glucose levels were decreased significantly by the treatment of 20 or 30 g raw materials crude drug x kg (-1) SHG orally for 7-10 d in ICR mice or in alloxan diabetic mice. In the oral sucrose tolerance test or oral starch tolerance test, the administration of SHG reduced significantly the peak value of the blood glucose and the area under the blood glucose-time curve (AUC) in normal or alloxan diabetic mice, respectively. These effects of SHG were similar to those of acarbose, a kind of alpha-glucosidase inhibitors. In the oral glucose tolerance test in normal and alloxan diabetic mice, SHG decreased both the blood glucose peak and the AUC induced by the glucose loading. But in the intraperitoneal injection glucose tolerance test the levels of insulin in both SHG and control mice were similar, however, the changes of the blood glucose level after the glucose-loading for 30 min in SHG mice was much lower than that in control mice.

CONCLUSIONWith the treatment of SHG, the fasting and no-fasting blood glucose concentrations were decreased and the glucose tolerance improved significantly in both normal and alloxan diabetic mice, and the inhibition of a-glucosidase might be one of its major mechanisms.

Administration, Oral ; Alloxan ; Animals ; Area Under Curve ; Blood Glucose ; analysis ; Diabetes Mellitus, Experimental ; blood ; chemically induced ; Drugs, Chinese Herbal ; administration & dosage ; isolation & purification ; pharmacology ; Glucose ; administration & dosage ; pharmacokinetics ; Glucose Tolerance Test ; Hypoglycemic Agents ; administration & dosage ; isolation & purification ; pharmacology ; Injections, Intraperitoneal ; Insulin ; blood ; Male ; Mice ; Mice, Inbred ICR ; Phytotherapy ; Plants, Medicinal ; chemistry ; Random Allocation ; alpha-Glucosidases ; metabolism

OBJECTIVETo evaluate the efficacy and safety of oxymatrine in the treatment of chronic hepatitis B.

METHODSA multicenter randomized double-blind placebo-controlled trial was conducted. A total of 144 patients with chronic hepatitis B entered the study for 52 weeks; of them 72 received oxymatrine, and 72 received a placebo. Before and after the treatment, clinical symptoms, liver function, serum hepatitis B virus markers, and adverse drug reactions were observed.

RESULTSIn 144 patients, 14 were dropped and excluded due to inconsistencies in the included standard. Therefore, the efficacy and safety of 130 patients were analyzed. After being treated for 52 weeks, 70.77% of the patients in the study group had a normal ALT level, and in 43.08% and 33.33% their HBV DNA and HBeAg became negative. In the placebo group, 39.68% had normal ALT level, and 12.31% and 3.33% had their HBV DNA and HBeAg become negative. The rates of complete response and partial response in the oxymatrine group were 23.08% and 58.46%, and in the placebo group they were 3.08% and 44.62%. They were significantly higher in the oxymatrine group than in the placebo group. In the oxymatrine treated patients, 12 weeks after its withdrawal, 60.00% had a normal ALT level, 41.54% and 23.33% had both HBV DNA and HBeAg negative. In the placebo group, 31.75% had a normal ALT level, 3.08% and 1.67% had both HBV DNA and HBeAg negative. The rates of complete response and partial response in the oxymatrine group were 21.54% and 47.69%, and in the placebo group they were 0 and 41.54%. They were significantly higher in the study group than in the placebo group. The adverse reaction rates of oxymatrine in the study and the placebo group were 7.69% and 6.15%, respectively, but there was no statistical significant difference between them.

CONCLUSIONOxymatrine is an effective and safe agent for the treatment of chronic hepatitis B.

Adolescent ; Adult ; Aged ; Alkaloids ; adverse effects ; therapeutic use ; Antiviral Agents ; adverse effects ; therapeutic use ; Double-Blind Method ; Female ; Hepatitis B, Chronic ; drug therapy ; Humans ; Male ; Middle Aged ; Quinolizines

Mercury sphygmomanometer based on traditional auscultation method is widely used in primary medical institutions in China, but a large amount of blood pressure data can not be directly recorded and applied in scientific research analysis, meanwhile auscultation data is the clinical standard to verify the accuracy of non-invasive electronic sphygmomanometer. Focusing on this, we designed a miniature non-invasive blood pressure measurement and verification system, which can assist doctors to record blood pressure data automatically during the process of auscultation. Through the data playback function,the software of this system can evaluate and verify the blood pressure algorithm of oscillographic method, and then continuously modify the algorithm to improve the measurement accuracy. This study introduces the hardware selection and software design process in detail. The test results show that the system meets the requirements of relevant standards and has a good application prospect.
Auscultation ; Blood Pressure/physiology* ; Blood Pressure Determination ; Oscillometry ; Sphygmomanometers

Hyperbaric oxygen therapy is a method of breathing pure oxygen or high-concentration oxygen in a highpressure environment to treat hypoxic diseases and related diseases. According to clinical verification, this therapy has an irreplaceable effect on certain diseases and has gradually become a comprehensive clinical treatment. One of the main methods of certain diseases is widely recognized by the medical field at home and abroad. The development history, treatment principles, key technologies, and future development trends of hyperbaric oxygen are discussed in detail, provide a research direction for the development of hyperbaric oxygen therapy in the future, and at the same time, it has also improved physicians' awareness of hyperbaric oxygen therapy, so as to improving Industry influence.
Hyperbaric Oxygenation ; Oxygen/therapeutic use* ; Research Design

To solve the problem of real-time detection and removal of EEG signal noise in anesthesia depth monitoring, we proposed an adaptive EEG signal noise detection and removal method. This method uses discrete wavelet transform to extract the low-frequency energy and high-frequency energy of a segment of EEG signals, and sets two sets of thresholds for the low-frequency band and high-frequency band of the EEG signal. These two sets of thresholds can be updated adaptively according to the energy situation of the most recent EEG signal. Finally, we judge the level of signal interference according to the range of low-frequency energy and high-frequency energy, and perform corresponding denoising processing. The results show that the method can more accurately detect and remove the noise interference in the EEG signal, and improve the stability of the calculated characteristic parameters.
Algorithms ; Electroencephalography ; Signal Processing, Computer-Assisted ; Signal-To-Noise Ratio ; Wavelet Analysis