Abstract: This invention relates to an apparatus for determining a given substance content of a fluid comprising a means for monitoring the fluid volume passing through the tube, and a heat sensitive indicator for indicating that the reactant mass has reached a critical heating temperature corresponding to a fluid volume flowing through the mass equal to a predetermined calibrated volume.

Abstract: An end tidal carbon dioxide addition device coupling to a nasal cannula used on patients under general anesthesia or sedated, to continuously measure the carbon dioxide content of the expired breath. A first embodiment device has a body a pair of nasal ducts with clips to attach to a nasal cannula. A pair of oral ducts collects exhaled oral gases which are combined with the nasal gasses to be analyzed for tidal carbon dioxide content. A pair of posts adjacent the oral ducts stabilize the device on a sedated patient. A second embodiment integrates a nasal cannula with the body to provide an economical disposable device and substitutes a flattened region with an array of apertures for the oral ducts.

Abstract: A transparent sheet 11 for transmitting an infrared ray therethrough is formed by laminating a PET sheet 5 on which a anti-fogging layer 4 can be formed easily and a PP sheet 12 with good infrared ray transmission property, thereby to make the thickness of the transparent window larger.

Abstract: The present invention features test systems and methods for detecting a hepatic disorder in a mammal and especially a primate. Preferred use of the invention involves staging the hepatic disorder in a human patient.

Abstract: The present invention provides a device for detecting the presence of an analyte, wherein said analyte is a microorganism marker gas. The device comprises a sample chamber having a fluid inlet port for the influx of the microorganism marker gas; a fluid concentrator in flow communication with the sample chamber, wherein the fluid concentrator has an absorbent material capable of absorbing the microorganism marker gas and thereafter releasing a concentrated microorganism marker gas; and an array of sensors in fluid communication with the concentrated microorganism marker gas. The sensor array detects and identifies the marker gas upon its release from fluid concentrate.

Abstract: A combined time clock breathalyzer is provided including a clock for tracking a current time, an inlet port, an alcohol sensor connected to the inlet port for determining an amount of alcohol in an air flow, and a printer. Also included is a controller adapted to calculate an alcohol percentage amount within a user from the amount of alcohol detected by the alcohol sensor. The controller is further adapted to provide an indication upon the alcohol percentage amount being greater than a predetermined amount.

Abstract: The invention is directed to a disposable airway adapter which includes two optical windows and a reflector, positioned such that radiation transmitted through the first optical window into the airway passage will be reflected by the reflector and be transmitted through the second optical window and out of the airway passage. the disposable airway adapter is for use in connection with a carbon dioxide detector for determining the concentration of carbon dioxide present in the mixture of gases present in the airway passage.

Abstract: A breath test for determining the rate of metabolism of a drug is described. First, a safe and effective amount of the drug, preferably appropriately labelled and most preferably isotopically-labelled, is administered to a subject. After a suitable time period, the exhaled breath of the subject is analyzed to determine the concentration of a metabolite. The concentration of the metabolite is then used to determine the rate of metabolism of the drug. A breath test kit is also described. Such a breath test kit would include an item or items necessary for performing at least one of the methods of determining the rate of metabolism of a drug in a subject. For example, such a breath test kit could include an isotopically-labelled drug to be administered to the subject.

Abstract: A dispensable alcohol breath analyzer system including a rectilinear box with an analyzer on one face and an extendable tube on another face. The system also includes a plurality of units located within the box to be dispensed, each unit containing an analyzer and a sanitary wrapper therearound. The indicator includes a cylindrical alcohol indicator and an associated rotatable indicator arrow. A gauge is provided whereby the increased content of alcohol permeates through the indicator to rotate the arrow to an extent corresponding to the percent of alcohol within the breath detected. The second indicator includes a diaphragm through which the user's breath may flow to exterior of the device and an associated color gauge thereadjacent whereby the diaphragm will change colors as a function of the percent of alcohol in the breath of the user for being compared with the color on the gauge.

Abstract: An apparatus and method for determining the concentration of alcohol present in a gaseous mixture wherein an electronic device employing a fuel cell determines the concentration of alcohol present in the gaseous mixture is disclosed. In particular, the device may be used to determine a person's sobriety by determining the alcohol concentration in a breath sample. To determine the alcohol concentration, the device must be able to accurately determine the volume of breath in the breath sample. The device controls the volume of the breath sample by measuring the pressure of the breath flow through the device and, in response to the pressure, electronically controlling a valve diverting a portion of the breath flow into the fuel cell. One application of the invention is a sobriety interlock for a machine where the machine remains disabled unless the operator is first determined to have an alcohol concentration below a predetermined level.