A measurement device includes a light emitter, a light receiver, an extractor, and a processor. The light emitter illuminates an illumination target having an internal space through which a fluid flows. The light receiver receives coherent light including light scattered by the illumination target and outputs a signal corresponding to intensity of the coherent light. The extractor extracts a direct-current component from the signal output from the light receiver at a temporal change in strength of the signal. The processor calculates a calculation value for a flow state of the fluid by performing a process on the signal output from the light receiver. The process includes correction using a value of signal strength of the direct-current component and calculation of a frequency spectrum for the signal at the temporal change in the signal strength.

An apparatus and method to enable clinicians to verify needle or catheter location within an anatomic site by relying upon combined sensing of two signals, such as a pressure signal and a heart rate pulse signal, in which the detection of a correlation between both signals is identified to confirm location of the needle or catheter.

Systems and apparatus are included that are configured to determine the effectiveness of apparatus and methods used to diagnose and unblock microvascular obstruction (MVO). An infusion system blocks antegrade flow for a short time and measures vascular pressure response as an infusate is infused in stepwise fashion at increasingly higher flowrates. During the antegrade flow occlusion, calculations of the real-time vascular resistance can be obtained using the formula R(t)=P(t)/Q.sub.mean(t) where: Q.sub.mean(t) is the flow mean values generated by the infusion system; P(t) is the distal pressure response in the vessel generated from the flow infusion; and R(t) is the calculated vascular resistance using the two other known parameters.

Systems and apparatus are included that are configured to determine the effectiveness of apparatus and methods used to diagnose and unblock microvascular obstruction (MVO). An infusion system blocks antegrade flow for a short time and measures vascular pressure response as an infusate is infused in stepwise fashion at increasingly higher flowrates. During the antegrade flow occlusion, calculations of the real-time vascular resistance can be obtained using the formula R(t)=P(t)/Q.sub.mean(t) where: Q.sub.mean(t) is the flow mean values generated by the infusion system; P(t) is the distal pressure response in the vessel generated from the flow infusion; and R(t) is the calculated vascular resistance using the two other known parameters.

The present invention relates to the field of medical monitoring, and in particular non-contact monitoring of one or more physiological parameters in a region of a patient during surgery. Systems, methods, and computer readable media are described for generating a pulsation field and/or a pulsation strength field of a region of interest (ROI) in a patient across a field of view of an image capture device, such as a video camera. The pulsation field and/or the pulsation strength field can be generated from changes in light intensities and/or colors of pixels in a video sequence captured by the image capture device. The pulsation field and/or the pulsation strength field can be combined with indocyanine green (ICG) information regarding ICG dye injected into the patient to identify sites where blood flow has decreased and/or ceased and that are at risk of hypoxia.

Disclosed herein are in vivo non-invasive methods and devices for the measurement of the hemodynamic parameters and aortic valve conformance and compliance in a subject. The method requires measuring the peripheral pulse volume waveform (PVW), the peripheral pulse pressure waveform (PPW), and the peripheral pulse velocity waveform (PUW) from the same artery using a non-invasive device. The waveforms PPW and PUW are used to calculate the waveform dPdU which is used to determine aortic valve ejection volume, closure volume, and quality factor, as well as stroke volume and cardiac output. The disclosed methods and devices are useful in the diagnosis and treatment of aortic valve disease, disorders, and dysfunction.

A probe with a blood circulation sensor and a force or pressure sensor is placed against a patient. One part of the probe applies a force to another part of the probe which is pressed against the patient at one or more locations. The variation of a measure of blood circulation is recorded as a function of the applied pressure, thereby giving the operator a specific knowledge of the Tissue Perfusion Pressure (TPP), a measure of circulatory health, at each location.

A blood flow occlusion system includes an inflator and a pressure regulator coupled to a pressure cuff and a computing device coupled to the inflator and the regulator. The computing device comprises a memory coupled to the processor which is configured to be capable of executing programmed instructions stored in the memory to: determine brachial occlusion data based on calculating the brachial occlusion data with an occlusion regression equation using one or more input diagnostic parameters associated with a client; generate treatment parameters of a treatment program to treat the condition of the client based on the optimized brachial occlusion data and an obtained stage of the condition; generate programmed instructions of control commands to manage operation of the pressure cuff, inflator, and pressure regulator based on the treatment parameters; and initiate execution of the programmed instructions for the treatment program for treating the condition of the client when engaged.

A blood flow occlusion system includes an inflator and a pressure regulator coupled to a pressure cuff and a computing device coupled to the inflator and the regulator. The computing device comprises a memory coupled to the processor which is configured to be capable of executing programmed instructions stored in the memory to: determine brachial occlusion data based on calculating the brachial occlusion data with an occlusion regression equation using one or more input diagnostic parameters associated with a client; generate treatment parameters of a treatment program to treat the condition of the client based on the optimized brachial occlusion data and an obtained stage of the condition; generate programmed instructions of control commands to manage operation of the pressure cuff, inflator, and pressure regulator based on the treatment parameters; and initiate execution of the programmed instructions for the treatment program for treating the condition of the client when engaged.

An information display and control system that enables a fast and easy understanding and management of the status of the patient's dialysis is disclosed. Also disclosed is an information display and control system that enables a fast and easy understanding and management of the status of the patient's cardiovascular and ventilation systems. The system can control management of a patient's dialysis, as well as administration and management of a patient's medication and fluids. The display is organized by goals related to management of patient's dialysis machine, blood flow, dialyzer flow, and patient's body weight. The display is also organized by goals related to management of patient's cardiovascular system, ventilation system, and medications and fluids administration and management. Such goals include urea reduction rate, urea reduction ratio, fractional urea clearance, total urea reduction, dialysis treatment duration, hemodynamics, oxygenation, CO.sub.2 removal, medication status, and fluids status.