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

A novel blood pressure measurement system was designed which based on auscultatory method. And the electret sensor that embedded into the internal instrument can detect the Korotkoff-sound signal directly which is coupled by the cuff and transmitted in the cross connection. The BP values identification algorithm is based on combined detection of Korotkoff-sound and pulse signal, and the products of amplitudes and energies are calculated as the characteristic values of Korotkoff-sound, and the Korotkoff-sound phases are classified and detected by means of clustering of characteristic values, and then BP parameters are determined. The contrast test and statistical analysis showed good consistency and accuracy between the new BP detection method and conventional mercury sphygmomanometer.
Blood Pressure ; Blood Pressure Determination ; instrumentation ; methods ; Equipment Design

In this study, a platform for long-term and non-invasive blood pressure monitoring is proposed, Its software system and the functions of different program modules in the software system are introduced together with the development methods of the main modules.
Blood Pressure Determination ; instrumentation ; methods ; Blood Pressure Monitors ; Software Design

This paper briefly introduces the basic principle of non-invasive automated sphygmomanometers, discusses its accuracy and influence factors and analyzes the Calibration test methods and its Inadequacies in application process as well.
Automation ; instrumentation ; methods ; Blood Pressure Determination ; instrumentation ; methods ; Sphygmomanometers

The development of the integrated blood pressure system with bluetooth communication function is introduced. Experimental results show that the system can complete blood pressure measurement and data transmission wireless effectively, which can be used in m-Health in future.
Blood Pressure Determination ; instrumentation ; methods ; Humans ; Telemetry ; instrumentation

This paper presents a method of noninvasive and continuous measurement of blood pressure by pulse wave. The method is realized by extracting the characteristic parameters of human brachial artery pulse wave and developing the stepwise regression equation. The experiment results showed that blood pressure measured by this method was well correlated with which measured by mercury sphygmomanometer. The mean difference of blood pressure was smaller than 3 mmHg, and the standard deviation was smaller than 5 mmHg.
Blood Pressure ; physiology ; Blood Pressure Determination ; methods ; Blood Pressure Monitors ; Humans ; Pulse

OBJECTIVESTo explore the significance of noninvasive central blood pressure detection in blood pressure management and vessel function assessment of hypertension.

METHODSA total of 348 subjects were recruited in the study and A-pulse CASP software were derived to measure the parameters of CASP and vessel function. The recruited subjects were divided into different groups for analysis according to age and disease.

RESULTS(1) CASP in hypertension group were both higher than those in normal group, while RAI and PRT lower. (2) Hypertensive patients of which brachial blood pressure were controlled have lower CASP and RAI than those above the level. (3) Hypertensive patients whose brachial blood pressure were controlled have significantly higher CASP than normal subjects.

CONCLUSIONSCentral blood pressure is more reflective of actural blood pressure and vessel function. Enhanced control of CASP in hypertensive patients contributes to improving vessel compliance.

Physiology parameters measurement based on volume pulse wave is suitable for the monitoring blood pressure continuously. This paper described that the systolic blood pressure (SBP) and diastolic blood pressure (DBP) can be calibrated by measuring the pulse propagation time, just on one point of finger tip. The volume pulse wave was acquired by lighting the red and infrared LED alternately, and after signal processing, an accelerated pulse wave was obtained. Then by measuring the pulse wave propagation time between the progressive wave and reflected wave, we can find the relationship of the time and the blood pressure, and establish the related systolic blood pressure measurement equation. At the same time, based on the relationship between alternating current and direct current components in the volume pulse waveforms and through regression analysising, the relevant diastolic blood pressure measurement equation can be established. 33 clinical experimentation cases have been worked by dividing them into two groups: training group (18 cases) and control group (15 cases), by comparing with the measuring results of the OMRON electronic sphygmomanometer. The results indicated that the two methods had good coherence. The measurement described is simple and reliable, and may be served as a new method for noninvasively and continuously measurement of blood pressure.
Blood Pressure ; physiology ; Blood Pressure Determination ; instrumentation ; methods ; Humans ; Pulse ; Sphygmomanometers

To address the accuracy problem of the oscillometric method in electronic blood pressure monitor, this paper introduces a more accurate new blood pressure measurement model, which based on ANN. And simulation checking method is put forward.
Blood Pressure Determination ; instrumentation ; methods ; Blood Pressure Monitors ; Models, Theoretical ; Neural Networks (Computer)

Based on Moens-Korteweg model & hydrostatic principle, a simple calibration method by changing vertical distance between heart and radial artery is proposed in this paper. Using hydrostatic pressure to change arterial pressure and pulse wave transmit time, consequently obtain several sets of cardiovascular parameters and finally build up relationship between blood pressure and pulse wave transmit time. Clinical tests have been carried with different age and gender for long and short time monitoring. The comparison results with Sphygmomanometer OMRON EW3152 show its promising accuracy and coincidence feature in blood pressure measurement.
Blood Pressure Determination ; instrumentation ; methods ; Blood Pressure Monitors ; Calibration ; Equipment Design