An air circuit structure comprises the air circuit box, an air charging pump, a cuff air nozzle, air discharging valves and an air pressure examination sensor. The air circuit box comprises a shell with a cavity formed inside. The shell is provided with an access port, an air charging port and an air inlet port spaced apart, and the access port, the air charging port and the air inlet port are all connected to the cavity.

A device for obtaining physiological information including plethysmographs of a medical patient and detecting a condition of pneumonia. The portable pneumonia screening device may include one or more sensors configured to obtain physiological information. The pneumonia screener may provide for methods of selecting and interfaces to assist selecting a patient's age group. The screener may match a selected age group from a set of programmed threshold level of oxygen saturation, respiratory, pulse rate, or other physiological parameters to assist pneumonia diagnosis. The pneumonia screener may provide one or more visual and/or audio stimuli, such as an animation, sound or music. The visual and/or audio stimuli may indicate initialization, diagnostic in progress, completion, or other events or progress of events. In some embodiments, the visual and/or auditory stimuli may be used to soothe or intrigue the patient such that patient agitation is reduced during the screening process.

Embodiments of the present disclosure disclose a method for detecting an effective pulse wave and provide a sphygmomanometer and a method for controlling the sphygmomanometer. The method for detecting the effective pulse wave may include: selecting a pulse wave controlling parameter; setting an initial pulse wave controlling parameter; determining at least one pulse wave based on the initial pulse wave controlling parameter, determining a corrected initial pulse control parameter by correcting the initial pulse wave controlling parameter based on at least one pulse wave controlling parameter of the at least one pulse wave; determining at least one subsequent pulse wave based on the corrected initial pulse wave controlling parameter, and further correcting the corrected pulse wave controlling parameter based on at least one pulse wave controlling parameter of the at least one subsequent pulse wave; and repeating above iterative process and continuously correcting the initial pulse wave controlling parameter, and extracting at least one effective pulse wave based on the pulse wave controlling parameter after the correction. The present disclosure may be closer to an actual situation of a measured subject by correcting the initial pulse wave controlling parameter continuously, thereby filtering out a detected invalid pulse wave and avoiding missing detection of the effective pulse wave.

Embodiments of the present disclosure disclose a method for detecting an effective pulse wave and provide a sphygmomanometer and a method for controlling the sphygmomanometer. The method for detecting the effective pulse wave may include: selecting a pulse wave controlling parameter; setting an initial pulse wave controlling parameter; determining at least one pulse wave based on the initial pulse wave controlling parameter, determining a corrected initial pulse control parameter by correcting the initial pulse wave controlling parameter based on at least one pulse wave controlling parameter of the at least one pulse wave; determining at least one subsequent pulse wave based on the corrected initial pulse wave controlling parameter, and further correcting the corrected pulse wave controlling parameter based on at least one pulse wave controlling parameter of the at least one subsequent pulse wave; and repeating above iterative process and continuously correcting the initial pulse wave controlling parameter, and extracting at least one effective pulse wave based on the pulse wave controlling parameter after the correction. The present disclosure may be closer to an actual situation of a measured subject by correcting the initial pulse wave controlling parameter continuously, thereby filtering out a detected invalid pulse wave and avoiding missing detection of the effective pulse wave.

The invention relates to a method of operating a long-term blood pressure measurement device having a measurement sensor for detecting a pulse wave signal, having a measurement sensor for body current signals, having a pressure cuff for a non-invasive determination of the blood pressure, having a control and evaluation unit for determining blood pressure values, on the one hand from signals acquired by means of the pressure cuff (pressure cuff signals), and, on the other hand from a pulse wave transit time that is derived from body current signals and pulse wave signals, and having a memory for storing blood pressure values.

A system and method prevents and diagnoses deep vein thrombosis in a body limb by providing a pressure sleeve having a plurality of individually fillable cells, the pressure sleeve being configurable to be placed around a body limb. A source fills each fillable cell individually, and a pressure sensor measures a pressure in a fillable cell. A controller establishes a fill sequence of each individually fillable cell and a fill time for each individually fillable cell. The controller causes a first individually fillable cell of the pressure sleeve to be filled to a predetermined pressure and causes the pressure of first individually fillable cell of the pressure sleeve to be measured while a second individually fillable cell of the pressure sleeve is filled. The controller determines a presence of deep vein thrombosis in a body limb having the pressure sleeve therearound based upon a measured pressure change in the first individually fillable cell of the pressure sleeve.

A method for measuring reactive hyperemia in a subject is disclosed. The method includes performing a first segmental cuff plethysmography to generate a baseline arterial compliance curve and/or a baseline pressure-area (P-A) curve, performing a second segmental cuff plethysmography to generate a hyperemic arterial compliance curve and/or a hyperemic P-A curve, and calculating an area between the baseline and the hyperemic curves. The size of the area can be used as an indication of endothelial dysfunction (ED) and ED-related diseases.

Provided is a blood pressure measuring apparatus including: a pressurizing unit applying pressure to a blood vessel according to a first condition or a second condition; a pressure sensor sensing a sphygmus wave and a pressure of the blood vessel from the blood vessel under the first condition or the second condition; a standard blood pressure calculating unit for calculating a systolic standard blood pressure and a diastolic standard blood pressure; a continuous blood pressure calculating unit for calculating continuous blood pressure; and a repressurizing determining unit for determining whether pressure is applied to the blood vessel under the second condition during measuring of continuous blood pressure.

Provided is a blood pressure measuring apparatus including: a pressurizing unit applying pressure to a blood vessel according to a first condition or a second condition; a pressure sensor sensing a sphygmus wave and a pressure of the blood vessel from the blood vessel under the first condition or the second condition; a standard blood pressure calculating unit for calculating a systolic standard blood pressure and a diastolic standard blood pressure; a continuous blood pressure calculating unit for calculating continuous blood pressure; and a repressurizing determining unit for determining whether pressure is applied to the blood vessel under the second condition during measuring of continuous blood pressure.

In the present invention, a pump driving circuit includes a step-up unit that steps up a first DC voltage from a power supply and outputs it as a second DC voltage, and an H bridge unit that has first and second series circuits that each include two switching elements connected in series between a high potential corresponding to the second DC voltage and a reference potential. According to a control signal from the control unit, the two switching elements of the first series circuit and the two switching elements of the second series circuit are switched on and off. A voltage generated between a first contact point between the two switching elements of the first series circuit, and a second contact point between the two switching elements of the second series circuit is used as a driving voltage for driving a pump.