RESUMO
In order to eliminate the intrinsic noise due to special structure of the wrist, a new curve fitting algorithm based on singular value decomposition (SVD) was developed to increase the measurement accuracy. This algorithm could be subdivided into SVD and curve fitting algorithm (SCFA). SVD was used to extract the dominant component of oscillation waves at wrist. Then oscillation amplitudes of dominant component and cuff pressure were used to determine arterial blood pressure (ABP) with curve fitting algorithm. To test the performance of SCFA, 45 subjects underwent the ABP measurement with different methods. The correlation coefficient between the pooled blood pressure measured by the auscultation and those by SCFA was 0.96. Comparison the results of SCFA with those of traditional curve fitting algorithm (TCFA), we found that the proposed SCFA could be used to reduce the partial intrinsic interference and efficiently improve the accuracy of the ABP at wrist.
Assuntos
Humanos , Algoritmos , Determinação da Pressão Arterial , Oscilometria , PunhoRESUMO
Several short range radio communication standards get involved in, including non-standard protocol radio, Bluetooth protocol, Zigbee protocol. The present situation, particularly the advantages and disadvantages of medical monitoring systems based on short range radio communication in China and other countries are discussed. New technology and standard in this field, and their effects on medical monitoring system are also available.
RESUMO
Short range radio communication based on non-standard protocol is suitable for transmission in short distance,for it's low cost,power consumption and easy-to-develop.So,an individual healthcare monitoring system is designed on the basis of non-standard wireless communication chip nRF24L01.When compared with that of standard wireless communication,the system is gifted with higher performance,lower power consumption,and better communication capability.