Uab Vittamed

Rolandas Zakelis

Arminas Ragauskas

Gediminas Daubaris

Eugene A Saxon

Mark A Moehring

Vytautas Petkus

Renaldas Raisutis

Arne H Voie

Timothy Myers

Romanas Chomskis

Robert Giansiracusa

Steve Swedenburg

Mailee Hess

Marc McDaniel

Daubaris Gediminas

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

Method and apparatus for determining the absolute value of intracranial pressure

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.

Apparatus and method for simulating arterial blood flow under various pressure conditions

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Vilkaviskis, Lithuania

Rolandas Zakelis