Various patient monitoring systems, devices, and methods are disclosed for monitoring physiological parameters of a patient. A noninvasive blood pressure monitor can include an inflatable cuff, a pressure transducer, an air pump, and a plurality of air paths connecting the inflatable cuff, the pressure transducer, and the air pump. The monitor can also include an acoustic filter provided along at least one of the air paths. In some cases, the monitor can include first and second air pumps, as well as a processor to independently control operating characteristics of the air pumps. The processor can also control the air pumps so as to provide a first inflation rate for the inflatable cuff during a non-measurement portion of an inflation phase and a second, higher inflation rate during a measurement portion of the inflation phase.

An electrode is provided. The electrode includes a contact pad composed of boron-doped polycrystalline diamond (BDD); a fiber core composed of BDD extending longitudinally from the contact pad from a first end that is in direct contact with the contact pad to an opposing second end; and a polycrystalline diamond (PCD) cladding that coats and hermetically seals the contact pad and the fiber core. A first portion of the contact pad and a second portion at or near the second end of the fiber core are not coated and hermetically scaled by the PCD cladding. A method of fabricating the electrode is also provided.

The disclosure relates to techniques for transferring a pulse pressure waveform signal of a peripheral vascular site to a central vascular site. In some implementations, a method includes: obtaining a time-domain representation of a first pulse pressure waveform signal of a brachial artery of a subject; converting the time-domain representation of the first pulse pressure waveform signal to a frequency-domain representation of the first pulse pressure waveform signal; selecting a first plurality of frequency components of the frequency-domain representation of the first pulse pressure waveform signal; predicting, using a non-linear mapping, based on the first plurality of frequency components, a second plurality of frequency components of a frequency-domain representation of a second pulse pressure waveform signal of an ascending aorta or left ventricle of the subject; and converting the frequency-domain representation of the second pulse pressure waveform signal to a time-domain representation of the second pulse pressure waveform signal.

The disclosure relates to techniques for transferring a pulse pressure waveform signal of a peripheral vascular site to a central vascular site. In some implementations, a method includes: obtaining a time-domain representation of a first pulse pressure waveform signal of a brachial artery of a subject; converting the time-domain representation of the first pulse pressure waveform signal to a frequency-domain representation of the first pulse pressure waveform signal; selecting a first plurality of frequency components of the frequency-domain representation of the first pulse pressure waveform signal; predicting, using a non-linear mapping, based on the first plurality of frequency components, a second plurality of frequency components of a frequency-domain representation of a second pulse pressure waveform signal of an ascending aorta or left ventricle of the subject; and converting the frequency-domain representation of the second pulse pressure waveform signal to a time-domain representation of the second pulse pressure waveform signal.

A sphygmomanometer configured to measure a blood pressure by compressing a part of a user to be measured with a cuff includes a blood pressure measurement unit configured to measure the user's blood pressure based on a pulse wave signal in a pressurization process of pressurizing a cuff pressure indicating an inner pressure of the cuff, a determination unit configured to determine whether an arrhythmia occurs in the user based on the pulse wave signal during the pressurization process, and a mode setting unit configured to set one of a first mode for executing the determining of the arrhythmia and a second mode for not executing the determining of the arrhythmia. The blood pressure measurement unit sets a first pressurization speed of the cuff pressure when the first mode is set to be lower than a second pressurization speed of the cuff pressure when the second mode is set.

A sphygmomanometer configured to measure a blood pressure by compressing a part of a user to be measured with a cuff includes a blood pressure measurement unit configured to measure the user's blood pressure based on a pulse wave signal in a pressurization process of pressurizing a cuff pressure indicating an inner pressure of the cuff, a determination unit configured to determine whether an arrhythmia occurs in the user based on the pulse wave signal during the pressurization process, and a mode setting unit configured to set one of a first mode for executing the determining of the arrhythmia and a second mode for not executing the determining of the arrhythmia. The blood pressure measurement unit sets a first pressurization speed of the cuff pressure when the first mode is set to be lower than a second pressurization speed of the cuff pressure when the second mode is set.

A sphygmomanometer includes a blood pressure measurement unit configured to measure a user's blood pressure based on a pulse wave signal in a pressurization process of pressurizing a cuff pressure indicating an inner pressure of a cuff worn on a part of the user to be measured. The blood pressure measurement unit sets a pressurization speed in a predetermined period of a pressurization process to be slower than a pressurization speed in a period other than the predetermined period in the pressurization process. The predetermined period is set based on a timing at which the amplitude of the pulse wave signal during the pressurization process is maximum or the timing at which the cuff pressure during the pressurization process is an average blood pressure of the user. The sphygmomanometer further includes a determination unit that determines arrhythmia of the user based on the pulse wave signal in the pressurization process.

A sphygmomanometer includes a blood pressure measurement unit configured to measure a user's blood pressure based on a pulse wave signal in a pressurization process of pressurizing a cuff pressure indicating an inner pressure of a cuff worn on a part of the user to be measured. The blood pressure measurement unit sets a pressurization speed in a predetermined period of a pressurization process to be slower than a pressurization speed in a period other than the predetermined period in the pressurization process. The predetermined period is set based on a timing at which the amplitude of the pulse wave signal during the pressurization process is maximum or the timing at which the cuff pressure during the pressurization process is an average blood pressure of the user. The sphygmomanometer further includes a determination unit that determines arrhythmia of the user based on the pulse wave signal in the pressurization process.

A sphygmomanometer configured to measure a blood pressure by compressing a part of a user to be measured with a cuff, the sphygmomanometer including a blood pressure measurement unit configured to, after a pressurization process of pressurizing a cuff pressure indicating an inner pressure of the cuff to a pressure greater than a specified pressure, measure the blood pressure of the user based on a pulse wave signal in a depressurization process of depressurizing the cuff pressure, a determination unit configured to determine whether or not an arrhythmia occurs in the user based on the pulse wave signal in the depressurization process, and a mode setting unit configured to set one of a first mode for executing the determining of the arrhythmia and a second mode for not executing the determining of the arrhythmia.

A sphygmomanometer configured to measure a blood pressure by compressing a part of a user to be measured with a cuff, the sphygmomanometer including a blood pressure measurement unit configured to, after a pressurization process of pressurizing a cuff pressure indicating an inner pressure of the cuff to a pressure greater than a specified pressure, measure the blood pressure of the user based on a pulse wave signal in a depressurization process of depressurizing the cuff pressure, a determination unit configured to determine whether or not an arrhythmia occurs in the user based on the pulse wave signal in the depressurization process, and a mode setting unit configured to set one of a first mode for executing the determining of the arrhythmia and a second mode for not executing the determining of the arrhythmia.