A system for measuring cardiovascular data includes an elongate member having a channel, a first expandable member carried by the elongate member and movable between a collapsed state and an expanded state by adjustment initiated externally of a subject, a first sensor disposed on a surface of the elongate member, second and third sensors disposed on a surface of the first expandable, a first optical sensor located at a first location in relation to the distal end of the elongate member and configured for obtaining photoplethsmographic data, and wherein the first expandable member in its expanded state is configured to interface with the subject's larynx for delivery of at least oxygen gas into the respiratory system of the subject, and the second and third sensors are configured to contact tissue in proximity to the larynx when the first expandable member is in its expanded state.

A glove is described to simultaneously, non-invasively, and continuously, over a period of time, monitor physiological parameters (e.g., blood pressure, blood glucose, oxygen saturation level, electrical activity of the heart, and/or heart rate) of a patient. A computing server that is either communicatively coupled to the glove or is a part of the glove uses the monitored physiological parameters to determine whether the patient has a physiological condition (e.g., hypotension, hypertension, hypoglycemia, hyperglycemia, hypoxia, hyperoxia, arrhythmia, a strong form of tachycardia, a mild form of tachycardia, and/or bradycardia). Related apparatuses, systems, methods, techniques and articles are also described.

A low volume or narrower blood pressure cuff compared to commercial counterparts with similar medical approval accuracy is introduced. The present invention comprises an occlusion component configured to occlude the artery, and a pulse wave detection component to detect blood pressure oscillations. Blood pressure readings within medical approval accuracy are achieved by controlling and adjusting fluid amount in or fluid flowing into said pulse wave detection component.

A blood pressure monitoring device includes a body portion having a size and structure to extend around an appendage of a user during use, a fluid bladder at least one of attached to or integral with the body portion and arranged to be able to apply pressure to an adjacent artery or vein of the user during use, a pressure actuator fluidly connected to the fluid bladder, a controller configured to provide control signals to the pressure actuator to fill the fluid bladder to selected pressures, a signal processor configured to communicate with the controller to receive signals indicating the selected pressures to which the fluid bladder is filled, and a pressure sensor arranged in operative contact with the fluid bladder to measure blood pressure waveforms plus bladder fluid pressure to provide a pressure waveform signal containing information regarding a relationship between vessel distention and transmural pressure. The pressure sensor is further configured to communicate with the signal processor to provide the pressure waveform signal to the signal processor. The controller is configured to provide a plurality of selected pressures that are less than a mean arterial pressure of the user, and the signal processor is configured to calculate blood pressure parameters using pressure waveform signals produced during application of the plurality of selected pressures that are less than the mean arterial pressure of the user.

A blood circuit having a pressure measurement portion connected to a pressure measurement device includes: a first measurement portion provided downstream of a pumping segment; and a second measurement portion provided upstream of the pumping segment. The first measurement portion includes: a first housing having a tubular shape; and a first flexible membrane having a tubular shape and provided in the first housing. The second measurement portion includes: a second housing having a tubular shape; and a second flexible membrane having a tubular shape and provided in the second housing. A space between the first flexible membrane and the first housing is larger than a space between the second flexible membrane and the second housing in an initial state before permitting the blood to flow.

Novel tools and techniques for assessing, predicting and/or estimating effectiveness of fluid resuscitation of a patient and/or an amount of fluid needed for effective resuscitation of the patient, in some cases, noninvasively.

Novel tools and techniques are provided for assessing, predicting and/or estimating a physiological state of a patient, based on variance of the patient's compensatory reserve index (“CRI”) before, during, and/or after a physical perturbation. In some embodiments, the system might receive a first set of physiological data from one or more sensors at a first time relative to a physical perturbation of the patient, and might calculate a first set of CRI values of the patient. The system might receive a second set of physiological data at a second time relative to the physical perturbation, calculate a second set of CRI values, analyze the two sets of CRI values against a pre-existing model, estimate a physiological state (e.g., hydration, etc.) of the patient, and display the estimate on a display device. The system might also control an infusion device to infuse fluids into the patient based on estimated hydration state.

Indirect, oscillometric, digital blood pressure monitoring systems and methods enabling self-calibration to obtain absolute blood pressure values using algorithmic analysis of arterial pressure pulses to establish an oscillometric profile and compensate for intervening effects on digital arterial pressure. Proper algorithmic analysis is dependent upon proper positioning and maintained engagement of a digital cuff on the digit of a user and subsequent hydraulic coupling of the cuff to the arteries within the digit.

An apparatus for measuring bio-information in a non-invasive manner includes: a pulse wave sensor configured to measure a plurality of pulse wave signals having different wavelengths from an object; a contact pressure sensor configured to measure contact pressure of the object while the plurality of pulse wave signals are measured; and a processor configured to obtain an oscillometric waveform based on the contact pressure and the plurality of pulse wave signals having the different wavelengths, and obtain bio-information based on the oscillometric waveform.

Optical ankle-brachial index (ABI) and blood pressure measurement systems and methods are disclosed. The blood pressure measurement system includes a pressure cuff and an optical pulse detector placed on a finger or toe or a reflectance optical pulse detector attached to the skin distal to the inflation bladder of its respective cuff. The ABI measurement system includes a brachial artery pressure cuff, a first reflectance optical pulse detector attached to the brachial artery pressure cuff or a transmission or reflectance optical pulse detector attached to a finger, an ankle pressure cuff; and a second reflectance optical pulse detector attached to the ankle cuff or an optical pulse detector attached to a toe. A computer may also be included in the above systems and methods to detect optical pulses from the detectors and control the inflation and deflation of the cuffs in order to determine blood pressure and/or ABI.