Buxco Electronics, Inc.

Data Sciences International, Inc.

Buxco Electric, Inc.

Joseph Lomask

Richard A Larson

Hai Dang Nguyen

Richard A Shafer

Yuval Shemesh

Chau Hong Le

Steve Karpinski

A plethysmograph is described that includes a test chamber having an opening; a sealing member including an annular flexible seal to receive at least a part of the head of the test animal mounted across the opening whereby the animal breathes air outside the test chamber, while the animal's body is within the test chamber; and a restraining member attachable to the sealing member, the restraining member including a clamp positionable behind the test animal's head, to prevent the animal from withdrawing its head from the restraining member. The animal is positioned in the restraining member and the sealing member is attached to the restraining member before insertion of the animal and assembly into the test chamber, avoiding previous difficulties in simultaneously placing an animal into the chamber while inserting the animal's nose into the seal. The plethysmograph also eliminates the necessity for a plunger to prevent rearward movement of the animal.

Plethysmograph with animal restraint

An integrated respiratory ventilation system and method for its calibration is described. The system includes a ventilator having air conduits, transducers adapted to emit signals proportional to the level of air pressure or air flow within the air conduits, and inspiration, expiration and exhaust ports. A processor-controlled calibrator is in communication with one or more of the air conduits. A preferred calibrator includes a water-filled outer column and a vertically aligned inner column extending into the outer column, the inner column having an upper end in communication with at least one of the ports. A processor controls the opening and closing of the ports and the level of air pressure in, and air flow from, the inner column to measure the level of transducer signals at two known pressures and two known flows. The processor uses the measured transducer signals to calibrate the transducer.

Integrated ventilator with calibration

A plethysmograph is constructed with a base including parallel, horizontal guide rails; an open-ended, moveable enclosure section having a horizontal central axis slidable on the guide rails between open and closed positions; a fixed enclosure section mounted on the base transverse to the horizontal pathway, the fixed enclosure section including an inner face toward the open end of the enclosure section adapted for sealing engagement with the open end of the moveable enclosure section when the moveable enclosure section is in its closed position; and a support table attached to the fixed section, the table projecting into the moveable enclosure section when the moveable enclosure section is in the closed position, the table being vertically adjustable and having an angularly adjustable longitudinal axis.

Adjustable table plethysmograph

Generally, the present invention is directed towards a system and method for displaying a scientific research data set viewable on an electronic display. The system is made up of a computerized device having an electronic display for displaying a selectable range of data points, an input device for receiving user input, and a digital processor for processing data and a memory for storing computer instructions and data. A set of graphical user interface instructions executable by the digital processor is stored within the memory to realize the method. The method includes steps of generating at least one data graphing area on the electronic display; graphing within the at least one data graphing area at least one line graph of data points representing at least a portion of the graphical data set; generating at least one graphical interface control for selectively rendering or removing from view a selectable range of the at least one line graph of data points; receiving input by way of the at least one graphical user interface control values indicative of the selectable range to render or remove and an indication of whether or not to render or remove from view the selectable range; and dynamically rendering or removing from view the selectable range of the at least one line graph of data points.

Collapsible (folding) graph

A cough event is differentiated from a sneeze event of a test subject enclosed within a plethysmograph test chamber by measuring air pressure changes during the event, and comparing the pressure changes against criteria indicative of a cough to determine the likelihood that the event is a cough. Air pressure changes are recorded as pressure and/or sound values. A graphical record of a waveform of changes in the air pressure during an event relative to a baseline value is recorded, and a value is calculated that is indicative of the likelihood that the event is a cough based on the sizes of areas between the waveform and baseline during the event, said areas including a first area indicative of the change in air pressure during air inspiration, a second area indicative of the change in air pressure during air compression, and a third area indicative of the change in air pressure during expiration.

Cough/sneeze analyzer and method

The accuracy of measurements of changes in air volumes within a plethysmograph is improved by addition of a manifold to provide a common source of exterior air to the plethysmograph test and reference chamber. The preferred plethysmograph includes test and reference chambers divided by a common separator wall, pneumotachs in communication with the chambers, and a differential pressure transducer having a first inlet in communication with the test chamber and a second inlet in communication with the reference chamber. The manifold includes an exterior air inlet and a passageway extending between the two pneumotachs and the air inlet. The passageway may be in the form of separate tubes or conduits, or a common housing covering the pneumotachs. Preferably, the distances from the exterior air inlets to the two pneumotachs are approximately the same.

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Wilmington, NC, United States of America

Joseph Lomask