Kuo C.-H.Wu C.-J.Chou H.-C.Chen G.-T.Kuo Y.-C.CHUNG-HSIEN KUO2022-05-242022-05-24201720402295https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031898113&doi=10.1155%2f2017%2f9128745&partnerID=40&md5=67eab5717212c335d8871c229e5aa775https://scholars.lib.ntu.edu.tw/handle/123456789/611565This paper presents an oscillometric blood pressure (BP) measurement approach based on the active control schemes of cuff pressure. Compared with conventional electronic BP instruments, the novelty of the proposed BP measurement approach is to utilize a variable volume chamber which actively and stably alters the cuff pressure during inflating or deflating cycles. The variable volume chamber is operated with a closed-loop pressure control scheme, and it is activated by controlling the piston position of a single-Acting cylinder driven by a screw motor. Therefore, the variable volume chamber could significantly eliminate the air turbulence disturbance during the air injection stage when compared to an air pump mechanism. Furthermore, the proposed active BP measurement approach is capable of measuring BP characteristics, including systolic blood pressure (SBP) and diastolic blood pressure (DBP), during the inflating cycle. Two modes of air injection measurement (AIM) and accurate dual-way measurement (ADM) were proposed. According to the healthy subject experiment results, AIM reduced 34.21% and ADM reduced 15.78% of the measurement time when compared to a commercial BP monitor. Furthermore, the ADM performed much consistently (i.e., less standard deviation) in the measurements when compared to a commercial BP monitor. ? 2017 Chung-Hsien Kuo et al.Pressure controlActive control schemesAir turbulenceDiastolic blood pressuresHealthy subjectsMeasurement timeStandard deviationSystolic blood pressure(SBP)Variable volumeBlood pressureaccurate dual way measurementair injection measurementArticleblood pressure measurementblood pressure monitoringcomparative effectivenesscomparative studydiagnostic accuracydiastolic blood pressurefeedback systemhumanmean arterial pressureoscillometrysignal noise ratiosignal processingsystolic blood pressureadultalgorithmblood pressuredevicesdiastoleequipment designnormal humanproceduresreproducibilitysphygmomanometersystoleAdultAlgorithmsBlood PressureBlood Pressure DeterminationDiastoleEquipment DesignHealthy VolunteersHumansOscillometryReproducibility of ResultsSignal Processing, Computer-AssistedSphygmomanometersSystole[SDGs]SDG3journal article10.1155/2017/91287452-s2.0-85031898113