ARMINAS RAGAUSKAS PDF

Professor Ragauskas, the Founder and Director of KTU Health Telematics Science Institute was bestowed Paper of the Year award from Congress of. Arminas Ragauskas. Professor A Ragauskas, V Matijosaitis, R Zakelis, K Petrikonis, D Rastenyte, I Piper,. A Ragauskas, G Daubaris, V Ragaisis, V Petkus. List of computer science publications by Arminas Ragauskas.

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Arminas Ragauskas has filed for patents to aminas the following inventions. An apparatus and method for noninvasively measuring intracranial pressure of a subject using an ultrasound transducer. The transducer is used to ragauskae arterial wall movement of an intracranial segment and an extracranial segment of the subject’s ophthalmic artery as different external pressure forces are applied to the orbital area of the subject.

When the waveforms of arterial wall movement between the intracranial segment and the extracranial segment are similar the intracranial pressure can be determined. Jonathan Maltz, Arminas Ragauskas. Method and system for predicting of acute hypotensive episodes.

A method and system of predicting a hypotensive episode in a patient using one or more time varying hypotension specific biomarkers corresponding to physiological processes in the patient. Raaguskas derived from sensors or other measurement devices such as ECG sensors can be used to generate biomarkers.

The biomarkers can then be used to generate an acute hypotension prediction classifier, or monitored factor, derived from a three dimensional temporal representation of two or more biomarkers.

Arminas Ragauskas (Lithuania)

When the monitored factor exceeds a predetermined threshold the method and system trigger an alarm before an appearance of a hypotensive episode in the patient. Kaunas University of Technology. A head frame for use in non-invasively determining the absolute value of intracranial arminnas of a living body having a hard, flexible shield for covering the eye area of a patient. The shield has an inner surface and an outer transducer surface. An elastic film is sealed along its outer edge to the inner surface of the ragayskas forming an expandable chamber.

First and second connectors are located on the shield, permitting an ragauskxs and outflow of pressurized liquid to the chamber. The elastic film expands inward toward the patient with an inflow of pressurized liquid, imparting a pressure against the patient’s eye.

An adjustable strap is attached to the shield for securing the head frame to the head of the patient.

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Arminas Ragauskas: Ultrasound to Safely Measure Brain Pressure ()

Method and apparatus for continuously monitoring intracranial pressure. A method and apparatus for continuously measuring the absolute intracranial pressure in a non-invasive manner is described by using an ultrasonic Doppler device which detects the pulsatility indexes of the blood flow inside the eye artery for both intracranial and extracranial eye artery portions.

The eye in which the blood flow is monitored is subjected to a arkinas pressure, sufficient to equalize the pulsatility index measurements of the internal and external portions of the eye artery. The pressure at which such equalization rgauskas is used as a reference for autocalibration of the apparatus so that continuous absolute aeminas pressure measurements may be taken over a particular sampling period.

Method and apparatus for determining the absolute value of intracranial pressure. A method and apparatus for obtaining the absolute value of intracranial pressure in a non-invasive manner is described by using an ultrasonic Doppler measuring device which detects the intracranial and extracranial blood flow velocities of the intracranial and extracranial segments of the ophthalmic artery.

dblp: Arminas Ragauskas

The eye in which the blood flow is monitored is subjected to an external pressure, sufficient to equalize the intracranial and extracranial angle-independent blood flow factors calculated from the intracranial velocity signal and extracranial velocity signal. Apparatus and method for simulating arterial blood flow under various pressure conditions.

An apparatus and method for simulating human ophthalmic artery for testing of ultrasound devices is disclosed, whereby two chambers are provided and are capable of being independently pressurized, one representing the intra-cranial space and the other representing extra-cranial space, and whereby a tube running through both chambers is provided, simulating the course of the ophthalmic artery and capable of being pressurized to stimulate arterial pressure.

The apparatus is operated by pressuring both chambers, and pumping a blood-imitating fluid through the vessel in a pulsatile manner. Method and apparatus for non-invasive continuous monitoring of cerebrovascular autoregulation state. A non-invasive method for continuous real-time monitoring of cerebrovascular blood flow autoregulation state includes simultaneous non-invasive monitoring of intracranial blood volume respiratory waves and lung volume respiratory waves, real-time decomposition of intracranial blood volume respiratory waves and lung volume respiratory waves into narrowband sinewave first harmonic components, determination therefrom of the phase shift between intracranial blood volume respiratory wave and lung volume respiratory wave first harmonics’ and derivation of cerebrovascular autoregulation state from that phase shift value.

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Arminas Ragauskas, Gediminas Daubaris. Apparatus and method of non-invasive cerebrovascular autoregulation monitoring.

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A non-invasive method for monitoring of cerebrovascular blood flow autoregulation state includes sensing intracranial blood volume waves, filtering a slow wave, respiratory wave, and pulse wave informative components from said intracranial blood volume waves, filtering slow wave and respiratory wave reference components from the pulse wave envelope, calculating a first phase shift between said slow wave informative component and said slow wave reference component, calculating a second phase shift between said respiratory wave informative component and said respiratory wave reference component, and calculating the index of evaluation of the status of cerebral autoregulation state ICAS from said first phase shift and said second phase shift.

Ultrasonic method and apparatus for measuring intracranial contents volume change. An ultrasonic method for indicating a characteristic of intracranial components’ volume changes includes the transmission of broadband ultrasound from a transmitting transducer positioned on one side of a human head to a receiving transducer located on another side of the human head with decomposition of the received signal into narrowband components and determination therefrom of group delay, phase angle and attenuation as a basis for derivation of the characteristic of the intracranial media.

The absolute value of the intracranial pressure is identified as that external pressure at which such equalization occurs.

Method and apparatus for noninvasive determination of the absolute value of intracranial pressure.

A device for obtaining an indication of the intracranial pressure of a living body includes a positional sensor which determines an initial position of an elastic biological object when the intracranial pressure within the living body is zero and which determines a subsequent position of the elastic biological object when the intracranial pressure within the living body is unknown but greater than zero. A pressure generator applies an external pressure to the elastic biological object, and a comparator compares the initial position with the subsequent position so as to identify the unknown intracranial pressure of the living body as that external pressure which causes the subsequent position to be equal to the initial position.