Abstract: A system for sampling exhaled breath and for supply of a gas, the system comprising: a gas delivery cannula comprising at least one nasal prong for insertion into a nostril, the nasal prong comprising a distal end; an exhaled breath sampling cannula for insertion into the nostril, the exhaled breath sampling cannula comprising a distal end; and a connector for coupling the gas delivery cannula to the exhaled breath sampling cannula, such that the distal end of the exhaled breath sampling cannula is disposed deeper in the nostril than the distal end of the nasal prong, to reduce dilution of sampled exhaled breath by delivered gas. The connected is configured to facilitate adjustability of an insertion depth of the exhaled breath sampling cannula into said nostril.

Abstract: There is provided herein, a bite block (100) comprising an insertion channel (134) and an airway channel (132) wherein the airway channel is adapted to receive exhaled breath and wherein the first insert channel is adapted to pass a medical instrument. There is provided herein, a bite block comprising an oral insert channel, wherein a portion of said channel opens into a cavity (142) adapted to slidably receive an oral prong (270) the oral insert channel is adapted to receive exhaled breath.

Abstract: There is provided an airway tube for breath sampling, comprising a breath sampling port comprising two or more inlets adapted to sample breath from the airway tube. The inlets are connected to each other through a junction located outside of the air passageway of the airway tube.

Abstract: An endoscopic bite block comprising a tubular body having an upper outer surface and a lower outer surface; a front plate having an upper section and a lower section, said upper section being disposed outwardly relative to said lower section, to enable appropriate lip fitting; a teeth positioning region on at least one of said upper and lower outer surfaces; and a nasal gas channel selected from the group consisting of: a breath sampling prong and a gas delivery channel, wherein said teeth positioning region and the disposition of said sections of the front plate are configured to maintain said endoscopic bite block in a predetermined, upright position within a mouth of a subject, to enable a correct position of said nasal gas channel in relation to a nose of the subject.

Abstract: A diaphragm pump and a method for aligning thereof, the pump including an electric motor, a motor shaft, driven by the electric motor for rotation about an electric motor shaft axis, an eccentric drive, driven by the electric motor, via the motor shaft, to provide reciprocal driving along a pump driving axis, the eccentric drive including an eccentric drive shaft rotating about an eccentric drive shaft axis, the eccentric drive shaft axis being coaxial with the electric motor shaft axis, a non-rigid coupling interconnecting the motor shaft and the eccentric drive shaft and a diaphragm pumping assembly having a fluid inlet and a fluid outlet communicating with a pumping chamber, the pumping chamber having a diaphragm arranged to be reciprocally driven about the pump driving axis.

Abstract: There is provided a breath sampling tube comprising a deflector adapted to reduce liquid intake into a sampling inlet. There is also provided a breath sampling tube including a deflector adapted to deflect liquid droplets present in breath to reduce liquid at the sampling inlet. There is also provide d a breath sampling system including a gas analyzer and a breath sampling tube comprising a deflector adapted to deflect breath to reduce liquid at the sampling inlet. There is also provided a breath sampling system including a gas analyzer and a breath sampling tube comprising a deflector adapted to deflect liquid droplets present in breath to reduce liquid at the sampling inlet.

Abstract: This invention is a neonatal airway adapter (10) with a sliding internal passage (54), which virtually eliminates void volumes (112) within the bore (76) of the airways, such that mixing of the exhales pages with void gases is reduced, and the waveform of the breath is maintained without undue distortion. Furthermore, the virtual elimination of void volumes reduces the level of re-breathing. The neonatal airway adapter connects to endotracheal tube adapters is such a way as to nullify the effect of the differing internal diameters (20) and internal lengths which are used in ET adapters currently available. The cross section of the internal bore of the airway through which the breath flows from the ET adapter to the connector of the ventilator is maintained almost constant, especially in the region of the gas sampling point (66), to ensure that reasonable conditions of laminar flow, and accurate sampling are maintained.

Abstract: Breath test methods and apparatus for increasing accuracy and reducing the time taken to achieve diagnostically useful results. In order to determine when an increase in isotopic ratio of the exhaled breath is clinically significant, methods are described for the use of a variable and multiple threshold level; for reducing the time taken to determine an accurate baseline level; and for avoiding the effects of oral activity when making measurements. To increase measurement accuracy, methods are described, using the results of the breath tests themselves, of continuous and automatic self-calibration to correct for drifts in the gas spectrometer absorption curves. A method for increasing the spectral stability of cold cathode discharge infra-red light sources for use in breath test instrumentation is described. Calibration checking devices and methods of mandating their use at regular time intervals are described, to ensure maintenance of the accuracy of breath tests.

Abstract: A diaphragm pump and a method for aligning thereof, the pump including an electric motor, a motor shaft, driven by the electric motor for rotation about an electric motor shaft axis, an eccentric drive, driven by the electric motor, via the motor shaft, to provide reciprocal driving along a pump driving axis, the eccentric drive including an eccentric drive shaft rotating about an eccentric drive shaft axis, the eccentric drive shaft axis being coaxial with the electric motor shaft axis, a non-rigid coupling interconnecting the motor shaft and the eccentric drive shaft and a diaphragm pumping assembly having a fluid inlet and a fluid outlet communicating with a pumping chamber, the pumping chamber having a diaphragm arranged to be reciprocally driven about the pump driving axis.

Abstract: There is provided an oral nasal cannula for sampling breath of a subject, including a main body portion, having formed therein a suction port which is adapted to be connected to a suction device for side sampling of exhaled breath of the subject, at least one nasal prong integrally formed with the main body portion and adapted to collect nasally exhaled breath of the subject and an oral scoop, integrally formed with the main body portion and adapted to collect orally exhaled breath of the subject.

Abstract: There is provided a cannula which may include a spacer adapted to maintain a minimum distance between at least a portion of an oral cavity and at least a portion of an oral breath collector and at least one nasal breath collector. There is also provided a method for sampling exhaled breath including positioning a cannula on a face of a subject, wherein the cannula may include a spacer adapted to maintain a minimum distance between at least a portion of an oral cavity and at least a portion of an oral breath collector and at least one nasal breath collector.

Abstract: A diaphragm pump and a method for aligning thereof, the pump including an electric motor, a motor shaft, driven by the electric motor for rotation about an electric motor shaft axis, an eccentric drive, driven by the electric motor, via the motor shaft, to provide reciprocal driving along a pump driving axis, the eccentric drive including an eccentric drive shaft rotating about an eccentric drive shaft axis, the eccentric drive shaft axis being coaxial with the electric motor shaft axis, a non-rigid coupling interconnecting the motor shaft and the eccentric drive shaft and a diaphragm pumping assembly having a fluid inlet and a fluid outlet communicating with a pumping chamber, the pumping chamber having a diaphragm arranged to be reciprocally driven about the pump driving axis.

Abstract: There is provided an oral nasal cannula for sampling breath of a subject, including a main body portion, having formed therein a suction port which is adapted to be connected to a suction device for side sampling of exhaled breath of the subject, at least one nasal prong integrally formed with the main body portion and adapted to collect nasally exhaled breath of the subject and an oral scoop, integrally formed with the main body portion and adapted to collect orally exhaled breath of the subject.

Abstract: A capnograph which performs an analysis of the breath waveforms measured by the carbon dioxide sensor, interprets the results of this analysis, and outputs to the operator diagnostic information about the respiratory status of the patient, or about the adequacy of the breathing support provided to the patient. The instrument compares a number of parameters characteristic of the waveforms of the patient's breath with an internal library of the values of those parameters expected from normal waveforms stored in its memory. These parameters may either relate to specific features of the waveform in the time domain, or may characterize spectral components of the waveform in the frequency domain. The capnographic waveform analysis may be combined with further non-invasive measurements in order to provide an indication of the deviation of the value of EtCO2 from PaCO2.

Abstract: This invention is a neonatal airway adapter (10) with a sliding internal passage (54), which virtually eliminates void volumes (112) within the bore (76) of the airways, such that mixing of the exhales pages with void gases is reduced, and the waveform of the breath is maintained without undue distortion. Furthermore, the virtual elimination of void volumes reduces the level of re-breathing. The neonatal airway adapter connects to endotracheal tube adapters is such a way as to nullify the effect of the differing internal diameters (20) and internal lengths which are used in ET adapters currently available. The cross section of the internal bore of the airway through which the breath flows from the ET adapter to the connector of the ventilator is maintained almost constant, especially in the region of the gas sampling point (66), to ensure that reasonable conditions of laminar flow, and accurate sampling are maintained.

Abstract: This invention is a neonatal airway adapter (10) with a sliding internal passage (54), which virtually eliminates void volumes (112) within the bore (76) of the airways, such that mixing of the exhaled gases with void gases is reduced, and the waveform of the breath is maintained without undue distortion. Furthermore, the virtual elimination of void volumes reduces the level of re-breathing. The neonatal airway adapter connects to endotracheal tube adapters in such a way as to nullify the effect of the differing internal diameters (20) and internal lengths which are used in ET adapters currently available. The cross section of the internal bore of the airway through which the breath flows from the ET adapter to the connector of the ventilator is maintained almost constant, especially in the region of the gas sampling point (66), to ensure that reasonable conditions of laminar flow, and accurate sampling are maintained.

Abstract: A breath test analyzer, which analyzes exhaled breaths of a patient for isotope labeled products generated in the patient's body after ingestion by the patient of an isotope labeled substance, where the presence of these isotope labeled products provide an indication of a medical condition in the patient. The analyzer uses a very sensitive infra-red spectrophotometer, which enables it to continuously collect and analyze multiple samples of the patient's breath, and process the outputs in real time, while the patient is still connected to the analyzer, such that a definitive result is obtained within a short time, such as the order of a few minutes. The breath test analyzer is sufficiently small that it can be easily accomodated in the office of a physician. The breath test analyzer can be utilized for a number of diagnostic breath tests, according to the isotope labeled substance ingested by the patient and the gases detected in the patient's breath.

Abstract: Apparatus for analyzing fluid supplied to it through a tube, comprising an analyzing instrument within an enclosure, a first connector attached to the tube and having an end face, a second connector, mating with the first connector and attached to the enclosure, a pair of optical fibers disposed inside the enclosure, a first end of each of the fibers is mounted in the second connector, there is a clear optical path between the end face of each of the first ends of the fibers and at least one common point on the end face. A light source is optically coupled to the second end of a first one of the pair of fibers, and a light detector optically coupled to the second end of the second one of the pair of fibers.

Abstract: A capnograph which performs an analysis of the breath waveforms measured by the carbon dioxide sensor, interprets the results of this analysis, and outputs to the operator diagnostic information about the respiratory status of the patient, or about the adequacy of the breathing support provided to the patient. The instrument compares a number of parameters characteristic of the waveforms of the patient's breath with an internal library of the values of those parameters expected from normal waveforms stored in its memory. These parameters may either relate to specific features of the waveform in the time domain, or may characterize spectral components of the waveform in the frequency domain. The capnographic waveform analysis may be combined with further non-invasive measurements in order to provide an indication of the deviation of the value of EtCO2 from PaCO2.

Abstract: A breath test analyzer, which analyzes exhaled breadths of a patient for isotope labeled products generated in the patient's body after ingestion by the patient of an isotope labeled substance, where the presence of these isotope labeled products provide an indication of a medical condition in the patient. The analyzer uses a very sensitive infra-red spectrophotometer, which enables it to continuously collect and analyze multiple samples of the patient's breath, and process the outputs in real time, while the patient is still connected to the analyzer, such that a definitive result is obtained within a short time, such as the order of a few minutes. The breath test analyzer is sufficiently small in that it can be easily accommodated in the office of a physician. The breath test analyzer can be utilized for a number of diagnostic breath tests, according to the isotope labeled substance ingested by the patient and the gases detected in the patient's breath.