The traditional cuff - based bp meters provide only a snapshot of the bp at a particular point in time , while this cuffless device measures accurate bp reading for each beat so that a continuous stream of bp and its variability can be obtained 传统的血压仪只能量度某一点特定时间的血压，而无袖带设计则能长时间连续量度血压，故能得出一段时间里的不同读数，并且从中能够观察血压的变化。
