Arteriostenosis inspecting apparatus and ankle-blood-pressure measuring apparatus

An arteriostenosis inspecting apparatus, comprising:

• an inflatable cuff which is adapted to be worn on an ankle of a living subject;
• a cuff-pressure changing device which decreases a pressure in the cuff from a pressure higher than a systolic blood pressure of the ankle;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• an increasing-point detecting means for detecting at least one increasing point where a magnitude of the distal pulse wave continuously detected by the distal-pulse-wave detecting device when the pressure of the cuff is decreased by the cuff-pressure changing device, significantly increases;
• and
• an arteriostenosis judging means for judging that the subject has arteriostenosis, based on a fact that the increasing-point detecting means detects the second increasing point.

An arteriostenosis inspecting apparatus, comprising:

• an inflatable cuff which is adapted to be worn on an ankle of a living subject;
• a cuff-pressure changing device which decreases a pressure in the cuff from a pressure higher than a systolic blood pressure of the ankle;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• and
• a display device which displays the distal pulse wave continuously detected by the distal-pulse-wave detecting device when the pressure of the cuff is decreased by the cuff-pressure changing device.

An arteriostenosis inspecting apparatus, comprising:

• an inflatable cuff which is adapted to be worn on an ankle of a living subject;
• a cuff-pressure changing device which changes a pressure in the cuff;
• an ankle-pulse-wave detecting device which detects an ankle pulse wave produced from the ankle and transmitted to the cuff;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• an amplitude-difference-value determining means for determining an amplitude difference value indicating a degree of difference between respective amplitudes of respective heartbeat-synchronous pulses of the ankle pulse wave and the distal pulse wave that are detected by the ankle-pulse-wave detecting device and the distal-pulse-wave detecting device, respectively, in a state in which the pressure of the cuff is made lower than a systolic blood pressure of the ankle by the cuff-pressure changing device;
• and
• an arteriostenosis judging means for judging that the subject has arteriostenosis, based on a fact that the amplitude difference value determined by the amplitude difference-value determining means is greater than a reference value.

An arteriostenosis inspecting apparatus, comprising:

• an inflatable cuff which is adapted to be worn on an ankle of a living subject;
• a cuff-pressure changing device which changes a pressure in the cuff;
• an ankle-pulse-wave detecting device which detects an ankle pulse wave produced from the ankle and transmitted to the cuff;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• a phase-difference determining means for determining a difference of respective phases of respective heartbeat-synchronous pulses of the ankle pulse wave and the distal pulse wave that are detected by the ankle-pulse-wave detecting device and the distal-pulse-wave detecting device, respectively, in a state in which the pressure of the cuff is made lower than a systolic blood pressure of the ankle by the cuff-pressure changing device;
• and
• an arteriostenosis judging means for judging that the subject has arteriostenosis, based on a fact that the phase difference determined by the phase-difference determining means is greater than a reference value.

An ankle-blood-pressure measuring apparatus for measuring a blood pressure of an ankle of a living subject, comprising:

• an inflatable cuff which is adapted to be worn on the ankle of the subject;
• a cuff-pressure changing device which decreases a pressure in the cuff from a pressure higher than a systolic blood pressure of the ankle;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• an increasing-point detecting device which detects at least one increasing point where a magnitude of the distal pulse wave continuously detected by the distal-pulse-wave detecting device when the pressure of the cuff is decreased by the cuff-pressure changing device, significantly increases;
• and
• an ankle-blood-pressure determining device which determines a pressure of the cuff when the increasing-point detecting device detects the second increasing point, as a systolic blood pressure of one of a plurality of tibial arteries of the ankle of the subject that has stenosis.

An arteriostenosis inspecting apparatus, comprising:

• an inflatable cuff which is adapted to be worn on an ankle of a living subject;
• a cuff-pressure changing device which decreases a pressure in the cuff from a pressure higher than a systolic blood pressure of the ankle;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• an increasing-point detecting device which detects at least one increasing point where a magnitude of the distal pulse wave continuously detected by the distal-pulse-wave detecting device when the pressure of the cuff is decreased by the cuff-pressure changing device, significantly increases;
• and
• an arteriostenosis judging device which judges that the subject has arteriostenosis, based on a fact that the increasing-point detecting device detects the second increasing point.

An arteriostenosis inspecting apparatus, comprising:

• an inflatable cuff which is adapted to be worn on an ankle of a living subject;
• a cuff-pressure changing device which changes a pressure in the cuff;
• an ankle-pulse-wave detecting device which detects an ankle pulse wave produced from the ankle and transmitted to the cuff;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• an amplitude-difference-value determining device which determines an amplitude difference value indicating a degree of difference between respective amplitudes of respective heartbeat-synchronous pulses of the ankle pulse wave and the distal pulse wave that are detected by the ankle-pulse-wave detecting device and the distal-pulse-wave detecting device, respectively, in a state in which the pressure of the cuff is made lower than a systolic blood pressure of the ankle by the cuff-pressure changing device;
• and
• an arteriostenosis judging device which judges that the subject has arteriostenosis, based on a fact that the amplitude difference value determined by the amplitude-difference-value determining device is greater than a reference value.

An arteriostenosis inspecting apparatus, comprising:

• an inflatable cuff which is adapted to be worn on an ankle of a living subject;
• a cuff-pressure changing device which changes a pressure in the cuff;
• an ankle-pulse-wave detecting device which detects an ankle pulse wave produced from the ankle and transmitted to the cuff;
• a distal-pulse-wave detecting device which is adapted to be worn on a distal portion of the subject that is located on a distal side of the ankle and detects a distal pulse wave produced from the distal portion;
• a phase-difference determining device which determines a difference of respective phases of respective heartbeat-synchronous pulses of the ankle pulse wave and the distal pulse wave that are detected by the ankle-pulse-wave detecting device and the distal-pulse-wave detecting device, respectively, in a state in which the pressure of the cuff is made lower than a systolic blood pressure of the ankle by the cuff-pressure changing device;
• and
• an arteriostenosis judging device which judges that the subject has arteriostenosis, based on a fact that the phase difference determined by the phase-difference determining device is greater than a reference value.