Other

Thornhill Scientific Inc.

Fisher, Joseph

Iscoe, Steve

Somogyi, Ron

Vesely, Alex

Azami, Takafumi

Preiss, David

Nayot, Dan

Prisman, Eitan

Adams, Tehilla

Eitan Prisman

Joseph A Fisher

Alex Vesely

David Preiss

Takafumi Azami

Steve Iscoe

Ron Somogyi

Tehilla Adams

Marat Slessarev

Dan Nayot

Joe Fisher

George Volgyesi

David Mikulus

Chris Hudson

Cliff Ansel

Joseph Fisher

A method of identifying alveolar ventilation (V) in a subject, the method comprising: (1) using a breathing circuit which, at exhalation, keeps exhaled gas separate from inhaled gas and at inhalation, when a first gas set (FGS) flow is less than the subject's minute ventilation (V), results in a subject inhaling FGS first and then a second gas set (SGS), for the balance of inhalation; (2) setting the FGS flow at a rate greater that V; (3) measuring an end tidal COconcentration at a steady state; (4) progressively lowering the FGS flow until a time equal to a recirculation time of COin the subject; and (5) deriving Vas the rate of FGS flow at the intersection between an average PETCOin a steady state and a line fit to the PETCOvalues after the rise in PETCOvalues begins until the recirculation time.

Method of measuring cardiac related parameters non-invasively via the lung during spontaneous and controlled ventilation

A breathing circuit for sequential gas delivery of a first gas set (FGS) and a second gas set (SGS) employs an arrangement of conduits and active or passive valves to prevent mixing of the FGS and SGS including a valve triggered by depletion of FGS that makes the SGS available for inspiration after the FGS is depleted.

Breathing circuits to facilitate the measurement of cardiac output during controlled and spontaneous ventilation

In a first aspect, the invention relates to an apparatus for inducing or maintaining a target end tidal concentration of a gas in a subject comprising a breathing circuit, a source of gas flow into the circuit, means for controlling the rate of the source of gas flow into the circuit and means for controlling the concentration of gases in the source gas flow independently from each other. In another aspect, the invention relates to a method of preparing an apparatus for inducing or maintaining a target end tidal concentration of a gas X in a subject comprising selecting a rate of a source gas flow into a breathing circuit, selecting the concentration of at least one constituent gas of a component gas making up the source gas to a level corresponding to the end tidal concentration of the gas X, whereby the apparatus is adapted to administer a source gas having a first gas composition.

Method and apparatus to attain and maintain target end tidal gas concentrations

A method of calculating the flux of any gas (x) in a CBC circuit for a ventilated or a spontaneous breathing subject, for example said gas(x) being; a) an anesthetic such as but limited to; i)NO; ii) sevoflurane; iii) isoflurane; iv) halothane; v) desflurame; or the like b) Oxygen; c) Carbon dioxide; or the like utilizing the following relationships; Flux of gas(x)=SGF (F&#x2212;F) wherein SGF=Source of gas flow into the breathing circuit (CBC circuit) in liters/minute as read from the gas flow meter as set by the anesthesiologist; F=Fractional concentration of gas X in the source gas (which is set by the anesthesiologist); F=Fractional concentration of gas X in the end expired gas as determined by a portable gas analyzer, or the like.

Method for continuous measurement of flux of gases in the lungs during breathing

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Toronto, Canada

Eitan Prisman