US 5,178,152 A · Electronic sphygmomanometer

Abstract

An electronic sphygmomanometer includes CPU-controlled peripheral elements such as a pump, an amplifier, an A/D converter and a printer. During measurement of blood pressure, power consumption is reduced by supplying power to these peripheral elements only when they are driven or operated. When a blood pressure measurement or a print-out of measured values ends, the CPU acts to cut off its own power to reduce power consumption further. The sphygmomanometer further includes a timer constantly supplied with power for the purpose of preserving time information. Operating power is supplied to the CPU in synchronism with a pulse signal outputted by the timer every minute. When the pulse signal arrives, the CPU reads in time information from the timer, causes the time information to be displayed by a display device, then cuts off its own power and waits for the next pulse signal. By repeating such processing, time is displayed while power consumption is minimized.

Claims12

Dependent claims

An electronic sphygmomanometer for measuring blood pressure of a patient, comprising:

a power source;
a cuff for wrapping around an arm of the patient;
amplifying circuit means for supplying an analog signal corresponding to pressure inside said cuff;
converting circuit means for converting the analog signal supplied by said amplifying circuit means into a digital signal;
pump means for increasing air pressure inside said cuff;
printer means for printing out the blood pressure information;
connecting means for connecting said power source with said amplifying circuit means, said converting circuit means, said pump means and said printer means, selectively and independently;
and
processing means for controlling said electronic sphygmomanometer to perform the blood pressure measurement and for controlling said connecting means to connect said power source to said amplifying circuit means, said converting circuit means and said pump means while measuring blood pressure and to connect said power source to said printer means while printing measured blood pressure.

6 more elements

An electronic sphygmomanometer comprising:

timekeeping means, supplied with power at all times, for outputting a pulse signal of a predetermined duration at fixed intervals determined by a minimum time unit to be displayed and for holding time information;
display means for displaying the time information and measured blood pressure information;
cover means for covering at least said display means;
first power supply means for supplying said display means with power to produce a display enable state in response to detecting that said cover means is open;
second power supply means for supplying power at least during the predetermined duration of the pulse signal output by said timekeeping means, when said display means is placed in the display enable state;
and
processing means for controlling blood pressure measurement performed by said electronic sphygmomanometer, said processing means including
power receiving means for receiving power from said second power supply means to power said processing means;
first signal output means for outputting an inhibit signal to said second power supply means to inhibit any interruptions in the power supplied therefrom, when said pulse signal is output by said timekeeping means;
read-in means for reading in the time information from said timekeeping means after the inhibit signal is output by said first signal output means;
output means for outputting the time information, read in by said read-in means, to said display means;
and
second signal output means for outputting a signal to said second power supply means to permit interruptions after the time information is subsequently output by said output means.

10 more elements

Dependencies are inferred from the claim text.

Electronic sphygmomanometer

Life of this patent

Electronic sphygmomanometer

Life of this patent

Abstract

Claims12