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    Headband with tension indicator
    32.
    发明专利
    Headband with tension indicator 未知

    公开(公告)号：AU2005215518A1

    公开(公告)日：2005-09-01

    申请号：AU2005215518

    申请日：2005-02-11

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： HANNULA DON ,  COAKLEY JOSEPH ,  MANNHEIMER PAUL D

    IPC: A61B5/00 ,  A41D20/00

    Abstract: A headband having a low stretch segment sized to fit around a wearer's head, and an elastic segment being smaller than the low stretch segment, and having a free end and an attached end, where the elastic segment is attached at its attached end with the low stretch segment. The headband also includes a tab portion having a first end and a second end, the first end of the tab portion being connected with the free end of the elastic portion, the second end of the tab portion configured to form a closed loop with the low stretch segment, around the wearer's head. The headband also includes visual indicator configured for monitoring the extended position of elastic segment and optionally a stop portion that is configured to engage against the elastic segment to limit its stretch. When having a stop portion, the tab portion also includes an indicator portion between its first end and the stop portion such that the indicator portion when visible indicates that the headband needs re-tightening; and when the indicator portion is not visible it indicates an adequate level of tension corresponding with delivering a pressure in the range higher than the venous pressure and lower than the capillary pressure to the forehead of the wearer.

    System and method for disconnection and occlusion detection in a patient ventilator
    34.
    发明专利
    System and method for disconnection and occlusion detection in a patient ventilator 未知

    公开(公告)号：AU6668998A

    公开(公告)日：1998-10-12

    申请号：AU6668998

    申请日：1998-02-24

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： ISAZA FERNANDO J

    IPC: A61M16/00 ,  A61M39/10

    Abstract: The system and method for detecting disconnection and occlusion of a tubing system of a patient ventilator detects disconnection of the tubing system, opens the exhalation valve, delivers an idle flow of breathing gas to the tubing system, disables breath triggering, and generates an alarm. A reconnection of the tubing system can also be detected, to initiate resumption of pressure supported inspiration. For occlusion detection, the pressure drop in the tubing system is determined by pressure sensors in the inspiratory and expiratory airways of the tubing system. The two pressure drop values are compared, and once occlusion is detected, an alarm is generated, and the ventilator responds to protect the patient from over distension. Abatement of the occlusion can also be monitored in a pressure based occlusion status cycling mode, and the ventilator can revert back to normal ventilation when the circuit occlusion or exhaust port occlusion are not detected.

    Patient monitoring system
    36.
    发明专利
    Patient monitoring system 未知

    公开(公告)号：AU3975497A

    公开(公告)日：1998-03-06

    申请号：AU3975497

    申请日：1997-08-08

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： SCHAAF LARRY A VANDER

    IPC: A61B5/0205 ,  A61B5/087

    Abstract: A method and apparatus for performing scoring analysis of the pathological sleep events of apnea, hypopnea and desaturation of a patient from a sampled data set of only three sensor signals, namely, airflow, heart rate and oxygen saturation. The data source is either currently sensed data or previously recorded data. A microprocessor provides the display, printing, input and output channels, operator interface and computation capability for the system. Specialized programs direct the analysis and operation thereof.

    Pulse oximeter and sensor optimized for low saturation
    37.
    发明专利
    Pulse oximeter and sensor optimized for low saturation 未知

    公开(公告)号：AU2236095A

    公开(公告)日：1995-10-23

    申请号：AU2236095

    申请日：1995-03-31

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： CASCIANI JAMES R ,  MANNHEIMER PAUL D ,  NIERLICH STEVE L ,  RUSKEWICZ STEPHEN J

    IPC: A61B5/145 ,  A61B5/00 ,  A61B5/1455 ,  A61B5/1464

    Abstract: A pulse oximeter sensor (410) with a light source optimized for low oxygen saturation ranges and for maximizing the immunity to perturbation induced artifact. Preferably, a red (112) and an infrared light source (114) are used, with the red light source (112) having a mean wavelength between 700-790 nm. The infrared light source (114) can have a mean wavelength as in prior art devices used on patients with high saturation. The sensor of the present invention is further optimized by arranging the spacing between the light emitter (112,114) and light detectors (116) to minimize the sensitivity to perturbation induced artifact. The present invention optimizes the chosen wavelengths to achieve a closer matching of the absorption and scattering coefficient products for the red and IR light sources. This optimization gives robust readings in the presence of perturbation artifacts including force variations, tissue variations and variations in the oxygen saturation itself.

    Photoplethysmography with a spatially homogenous multi-color source
    39.
    发明专利
    Photoplethysmography with a spatially homogenous multi-color source 未知

    公开(公告)号：AU2005232600A1

    公开(公告)日：2005-10-27

    申请号：AU2005232600

    申请日：2005-04-06

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： DEBRECZENY MARTIN

    IPC: A61B5/00 ,  A61B5/024 ,  F21V8/00 ,  G02B6/04

    Abstract: An apparatus for spatially homogenizing electromagnetic energy transmitted from different sources for measuring a physiological parameter. The apparatus includes a first inlet for receiving electromagnetic energy transmitted from a first source; a second inlet for receiving electromagnetic energy transmitted from a second source; a structure for spatially homogenizing the electromagnetic energy transmitted from the first source with the electromagnetic energy transmitted from the second source to form a spatially-homogenized multi-source electromagnetic energy; and an outlet for delivering the spatially-homogenized multi-source electromagnetic energy to a tissue location for measuring the physiological parameter. The structure for spatially homogenizing includes a first bundle of optical fibers having a first proximal end originating at the first inlet and a first distal end terminating at the outlet; a second bundle of optical fibers having a second proximal end originating at the second inlet and a second distal end terminating at the outlet; wherein at the outlet each first distal end of each fiber of the fibers of the first bundle is spatially mixed with each second distal end of each fiber of the fibers of the second bundle, so as to form a spatially-homogenized multi-source electromagnetic energy received from the first and the second inlets.

    Oximeter ambient light cancellation
    40.
    发明专利
    Oximeter ambient light cancellation 未知

    公开(公告)号：AU2005216985A1

    公开(公告)日：2005-09-09

    申请号：AU2005216985

    申请日：2005-02-24

    Applicant: NELLCOR PURITAN BENNETT INCORPORATED

    Inventor： SHEA WILLIAM ,  PETERSEN ETHAN ,  CHEW BRADFORD B

    IPC: A61B5/00 ,  A61B5/024

    Abstract: A pulse oximeter method and apparatus which provides (1) a notch filter at a distance between a modulation frequency and a common multiple of commonly used power line frequencies (50, 60, 100 and 120) and also (2) a demodulation frequency greater than a highest pulse rate of a person and lower than any harmonic of 50, 60, 100 or 120 Hz, to filter ambient light interference, while choosing an optimum demodulation frequency that avoids interference from the notch filter or from harmonics of the line interference. Also, ambient light for any low frequency interference, such as power line interference, is measured both before and after each of the light emitter wavelengths and the average of the ambient light is then subtracted from the detected signal.

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