There is provided an apparatus (12) for use with a wearable cuff (14) in measuring blood pressure. The cuff (14) is inflatable to pressurize a measurement site (20) of a subject (18). The apparatus (12) is configured to estimate a size of the cuff (14) during a current inflation of the cuff (14) and compare the estimated size of the cuff (14) to a previous size of the cuff (14) estimated during an inflation of the cuff (14) that immediately preceded the current inflation of the cuff (14). The apparatus (12) is also configured to, if the estimated size of the cuff (14) differs from the previous size of the cuff (14) by more than a predefined amount, change a pressure up to which the cuff (14) is inflated before deflation of the cuff (14) starts.

An assembly for enabling a caregiver to secure a physiological monitoring device to an arm of a user can include the physiological monitoring device a cradle configured to removably secure to the physiological monitoring device and to the user’s arm. The physiological monitoring device can include a first connector port configured to electrically connect to a first cable and a first locking tab movable between an extended position and a retracted position. The cradle can include a base, first and second sidewalls, a back wall connected to the base and the first and second sidewalls. The cradle can further include a first opening in the back wall configured to receive the first connector port and a second opening in the first sidewall configured to receive the first locking tab when the physiological monitoring device is secured to the cradle and the first locking tab is in the extended position.

A blood pressure monitor configured to removably mount to a cuff in a substantially symmetrical position with respect to a width of the cuff can include a housing defining an interior, a first port, and a second port. The first port can: secure to a first prong of the cuff when the cuff is mounted in a first orientation; receive and secure to a second prong of the cuff when the cuff is mounted in a second orientation; and enable fluid communication between the interior and at least one of a first fluid passage within the first prong and a second fluid passage within the second prong. The second port can: secure to the second prong of the cuff when the cuff is mounted in the first orientation; and receive and secure to the first prong of the cuff when the cuff is mounted in the second orientation.

Various systems and methods for collecting patient data are discussed herein. According to some systems and methods, a timer may be started, and a blood pressure data collection system is actuated to obtain a blood pressure measurement of a patient upon the expiration of the timer. The timer may be incorporated into a patient data collection system or method to ensure the patient is relaxed and calm prior to taking a blood pressure measurement. An event may be sensed by an environmental sensor system and the timer may be started in response to sensing the event. A clinician leaving a room where the patient is disposed is one example of an event. An interruption may be sensed by the environmental sensor system and the timer may be terminated in response to sensing the interruption. The clinician entering the room where the patient is disposed in one example of an interruption.

A system or method for validating an unvalidated cardiovascular parameter monitor can include receiving a plurality of reference cardiovascular parameter datasets, each reference cardiovascular parameter dataset associated with a patient of a plurality of patients; receiving a plurality of test cardiovascular parameter measurements, each test cardiovascular parameter measurement includes a cardiovascular parameter measured for a patient of the plurality of patients; and validating the cardiovascular parameter monitor based on an analysis of the plurality of reference cardiovascular measurements and the plurality of test cardiovascular parameter measurement.

A system or method for validating an unvalidated cardiovascular parameter monitor can include receiving a plurality of reference cardiovascular parameter datasets, each reference cardiovascular parameter dataset associated with a patient of a plurality of patients; receiving a plurality of test cardiovascular parameter measurements, each test cardiovascular parameter measurement includes a cardiovascular parameter measured for a patient of the plurality of patients; and validating the cardiovascular parameter monitor based on an analysis of the plurality of reference cardiovascular measurements and the plurality of test cardiovascular parameter measurement.

An arterial-pressure estimation apparatus includes a control unit configured to acquire sensor data indicating, as a blood flow timing, a timing at which a blood flow generated at one or more locations of a blood vessel downstream of an aorta is detected for each heartbeat when the one or more locations is compressed while a pressure is gradually reduced, record a value of the pressure corresponding to each blood flow timing, correct the value of the pressure corresponding to the blood flow timing included in an inspiration period of a respiration cycle, and estimate a change in an arterial pressure over time by referring to the acquired sensor data and the recorded and corrected value of the pressure.

A system or method for validating an unvalidated cardiovascular parameter monitor can include receiving a plurality of reference cardiovascular parameter datasets, each reference cardiovascular parameter dataset associated with a patient of a plurality of patients; receiving a plurality of test cardiovascular parameter measurements, each test cardiovascular parameter measurement includes a cardiovascular parameter measured for a patient of the plurality of patients; and validating the cardiovascular parameter monitor based on an analysis of the plurality of reference cardiovascular measurements and the plurality of test cardiovascular parameter measurement.

Disclosed are a blood pressure measurement system for calculating a blood pressure value by using biometric signals measured at two different regions and a blood pressure measurement method using the same. The blood pressure measurement system includes a first sensor unit for detecting a hemorheological parameter at one region of a body; a second sensor unit for detecting a hemorheological parameter and arterial pressure at another region of the body; and a control unit including a blood pressure calculation unit for calculating a blood pressure value of a region at which a first hemorheological parameter is detected, from the first hemorheological parameter detected by the first sensor unit and a second hemorheological parameter and the arterial pressure detected by the second sensor unit. The present invention relates to a blood pressure measurement system for measuring blood pressure by using a change in vascular resistivity and a blood pressure parameter, and more specifically, to a sphygmomanometer for calculating blood pressure by using vascular resistivity obtained by a hemorheological parameter detected at one region of a body and arterial pressure and a hemorheological parameter detected at another region of the body. Accordingly, it is possible to more accurately measure blood pressure of a desired blood pressure acquisition region on the basis of a hemorheological parameter variance and vascular resistivity and greatly enhance reliability of a sphygmomanometer.

A camera sensitive to near infrared light is placed proximate to the skin of a user and the area illuminated by one or more infrared light sources. A set of images of one or more blood vessels is obtained at successive times. The images are processed to determine a change in size of the vessel(s) from one time to another, corresponding to expansion and contraction of the vessels responsive to contraction of the user's heart. This change may be used to determine pulse rate, elasticity of the vessel, blood pressure, or other data about the user's physiological status. The data may be used to assess health status at a particular time, determine health trends for the user, and so forth.