Patent ID: 11903684
Assignee: NIHON KOHDEN CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A blood pressure measuring apparatus comprising:
a cuff that is mountable to a region of a living body in which a vein and an artery exist, a pressure control unit that controls an applied pressure applied to the region by the cuff mounted to the region;
a detection unit that detects pressure waveforms in which pulse wave components from the region overlap with the applied pressure, the pulse wave components comprise at least one from among pulse wave components of the artery and pulse wave components of the vein;
an analysis unit configured to obtain:
(i) an arterial pressure, a respiratory variation on a waveform of the artery, and a venous pressure, based on the pressure waveforms detected by the detection unit through onetime blood pressure measurement,
(ii) the arterial pressure including at least a diastolic blood pressure and a systolic blood pressure based on data of a third pressure waveform of the pressure waveforms in a third process in which the applied pressure is increased by the pressure control unit from a first time point to a second time point at which the obtaining of the systolic blood pressure is completed,
(iii) the respiratory variation on the waveform of the artery based on data of a first pressure waveform of the pressure waveforms in a first process, in which the applied pressure is reduced from a value at which the obtaining of the systolic blood pressure is completed at the second time point to a value equal to or lower than the diastolic blood pressure and is kept constant by the pressure control unit until a first predetermined time period elapses at a third time point, and
(iv) the venous pressure based on (a) data of a second pressure waveform of the pressure waveforms in a second process in which the applied pressure is decreased by the pressure control unit from the third time point until a second predetermined time period measured from the first time point elapses and (b) either the data of the third pressure waveform in the third process or the data of the first pressure waveform in the first process, the second predetermined time period corresponding to a term of obtaining the arterial pressure, the respiratory variation, and the venous pressure within 140 seconds; and
a determination unit configured to:
determine that the first predetermined time period measured from the second time point has elapsed; and
cause the pressure control unit to decrease or increase the applied pressure in the second process based on the determining that the first predetermined time period has elapsed.