Abstract: A cuff (200), having a blood shutting bag (210) and a detection bag (220), is attached to an upper arm of a patient and a main device unit (100) is made to operate. A CPU (130) performs the measurement operation in accordance with a program inside a memory (160). First, the air pump (140) is started to deliver air to the respective bags, the cuff pressure is set higher than the systolic pressure, and after the blood flow at the upper arm has been stopped completely, a leak valve (150) is gradually opened to lower the cuff pressure. During the lowering of pressure, the Korotkoff sound that is generated at the detection bag (220) is detected by a sound wave sensor (110) and is taken as digital data into the memory (160). This Korotkoff sound is Fourier transformed and the result thereof is displayed as a spectral waveform on a display device (170) and printed out by means of a printer (180).

Abstract: A cuff (200; 500) is put around an upper arm, and the blood flow of the upper arm is shut by a blood flow shutting bag (210; 520). A sound wave sensor (110) and a pressure sensor (120) are disposed in a rear detecting bags (230; 530) downstream of the blood flow shutting bag to detect pulse waves and Korotkoff sounds. The reference internal pressure in the cuff is controlled by an air pump and a leak valve controlled by a CPU (130; 430; 640). By monitoring the Korotkoff sounds or the pulse waves, the reference internal pressure of the cuff can be maintained at a diastolic pressure DP. A pulse wave obtained at this pressure on an upper arm is approximate to an aortic wave. This approximate aortic wave is displayed together with the Korotkoff sounds and its envelope, and an output indicative of blood circulation trouble information of the circulation system is obtained.

Abstract: A cuff (200; 500) is put around an upper arm, and the blood flow of the upper arm is shut by a blood flow shutting bag (210; 520). A sound wave sensor (110) and a pressure sensor (120) are disposed in a rear detecting bags (230; 530) downstream of the blood flow shutting bag to detect pulse waves and Korotkoff sounds. The reference internal pressure in the cuff is controlled by an air pump and a leak valve controlled by a CPU (130; 430; 640). By monitoring the Korotkoff sounds or the pulse waves, the reference internal pressure of the cuff can be maintained at a diastolic pressure DP. A pulse wave obtained at this pressure on an upper arm is approximate to an aortic wave. This approximate aortic wave is displayed together with the Korotkoff sounds and its envelope, and an output indicative of blood circulation trouble information of the circulation system is obtained.

Abstract: A cuff (200; 500) is put around an upper arm, and the blood flow of the upper arm is shut by a blood flow shutting bag (210; 520). A sound wave sensor (110) and a pressure sensor (120) are disposed in a rear detecting bags (230; 530) downstream of the blood flow shutting bag to detect pulse waves and Korotkoff sounds. The reference internal pressure in the cuff is controlled by an air pump and a leak valve controlled by a CPU (130; 430; 640). By monitoring the Korotkoff sounds or the pulse waves, the reference internal pressure of the cuff can be maintained at a diastolic pressure DP. A pulse wave obtained at this pressure on an upper arm is approximate to an aortic wave. This approximate aortic wave is displayed together with the Korotkoff sounds and its envelope, and an output indicative of blood circulation trouble information of the circulation system is obtained.

Abstract: A cuff (200; 500) is put around an upper arm, and the blood flow of the upper arm is shut by a blood flow shutting bag (210; 520). A sound wave sensor (110) and a pressure sensor (120) are disposed in a rear detecting bags (230; 530) downstream of the blood flow shutting bag to detect pulse waves and Korotkoff sounds. The reference internal pressure in the cuff is controlled by an air pump and a leak valve controlled by a CPU (130; 430; 640). By monitoring the Korotkoff sounds or the pulse waves, the reference internal pressure of the cuff can be maintained at a diastolic pressure DP. A pulse wave obtained at this pressure on an upper arm is approximate to an aortic wave. This approximate aortic wave is displayed together with the Korotkoff sounds and its envelope, and an output indicative of blood circulation trouble information of the circulation system is obtained.

Abstract: A cuff (200; 500) is put around an upper arm, and the blood flow of the upper arm is shut by a blood flow shutting bag (210; 520). A sound wave sensor (110) and a pressure sensor (120) are disposed in a rear detecting bags (230; 530) downstream of the blood flow shutting bag to detect pulse waves and Korotkoff sounds. The reference internal pressure in the cuff is controlled by an air pump and a leak valve controlled by a CPU (130; 430; 640). By monitoring the Korotkoff sounds or the pulse waves, the reference internal pressure of the cuff can be maintained at a diastolic pressure DP. A pulse wave obtained at this pressure on an upper arm is approximate to an aortic wave. This approximate aortic wave is displayed together with the Korotkoff sounds and its envelope, and an output indicative of blood circulation trouble information of the circulation system is obtained.

Abstract: A cuff (200) is put around an upper arm and a blood flow shutting bag (220) thereof shuts the blood flow at the upper arm. A forward detection bag (210) is disposed upstream and a rear detection bag (230) is disposed downstream of the blood flow shutting bag. A forward sensor (110) and a rear sensor (120) are provided to detect pressures in these bags. The sensors respectively detect a forward pulse wave (Wf) and a rear pulse wave (Wb). A reference internal pressure of the cuff is controlled by an air pump (140) and a leak valve (150) controlled by a CPU (130). The pulse waves are monitored to retain the reference internal pressure at a systolic pressure SP and a diastolic pressure DP. A propagation velocity of a pulse wave clearing the cuff retained at the systolic pressure SP can be given based on a delay time SPdt of the rear pulse wave with respect to the forward pulse wave. This propagation velocity is approximate to a blood flow velocity VH of the aorta in a high pressure period.

Abstract: An arterial distensibility can be measured by putting a cuff with a blood flow shutting bag on an upper arm. The arterial distensibility E can be measured by measuring a shut blood flow critical pressure Pc, a diastolic pressure Pf at the upper arm and a crest value h of a pulse wave transmitted to the upper arm by the expression E-h/(Pc-Pf). The cuff has a forward bag, a central bag and a rear bag. The forward bag functions as a blood flow shutting bag. A pressure change in the forward bag is detected by a forward sensor, and a pressure change in the rear bag is detected by a rear sensor. Based on these detected values, the shut blood flow critical pressure Pc, diastolic pressure Pf and the crest h are given.