The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2005
Filed:
Jun. 02, 2000
Kazuhiko Amano, Suwa, JP;
Kazuo Uebaba, Yokohama, JP;
Hitoshi Ishiyama, Toride, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The present invention relates to a device for diagnosing physiological state based on blood pulse waves detected in the body. It is the objective of the present invention to provide a device which correctly diagnoses the current physiological state based on changes in physiological state measured over a specified period of time in the past while taking into consideration the cyclical variation exhibited in physiological state. In order to realize this objective, the device according to the present invention has as its main components: blood pulse wave detectorand stroke-volume-per-beat measurerwhich respectively detect blood pulse wave and stroke volume in the body; blood pulse wave extraction memorywhich extracts characteristic information from the detected blood pulse wave; memoryin which the physiological state calculated from the stroke volume and this characteristic information is stored; output portionwhich outputs an alarm; and microcomputerwhich controls each part inside the device. The microcomputer calculates the circulatory parameters based on characteristic information obtained from the waveform extraction memory, and stores the parameters in memory at specified time intervals. At these times, microcomputercalculates the circulatory parameters from the stroke volume per beat and the characteristic information of the blood pulse wave at specified time intervals, and stores the parameters in memory. Further, microcomputerreads out from memorythe circulatory parameters from a specified time interval in the past, and calculates the average value and standard deviation. Microcomputerthen determines whether or not the current circulatory parameters are within a specified range determined by their average value and standard deviation. When the circulatory parameters are determined to be outside this range, microcomputercontrols output portionto sound an alarm.