Abstract: An oscillatory positive expiratory pressure respiratory therapy device which may be incorporated into the expiratory limb of a ventilator circuit. Accordingly, this device allows a patient on a ventilator to be subjected to positive expiratory pressure (PEP) therapy combined with airway oscillation and intermittent air flow acceleration while allowing the oscillatory PEP respiratory therapy treatment to be bypassed without interrupting the integrity of the ventilating circuit once the device has been installed in the ventilator circuit. In this manner, all expiratory air in the ventilator circuit is accounted for, the expiratory air volume may be accurately monitored and the ventilator circuit does not have to be broken for insertion or removal of the device.

Abstract: An oxygen mask assembly including an oxygen dilutor assembly with air inlet apertures located in a top wall thereof for diluting the oxygen flowing therethrough. In one embodiment, the mask assembly additionally includes an air reservoir bag assembly, a one-way inhalation valve for maintaining continuous positive airway pressure in the mask and a pressure valve on the mask for adjusting the air pressure in the mask.

Abstract: A multi-use, hand held, single patient oscillatory positive expiratory pressure respiratory therapy device which is easily assembled and disassembled for cleaning, and which is not position dependent during therapy, but operable through a wide range of device orientation.

Abstract: An oscillatory positive expiratory pressure respiratory therapy device which may be incorporated into the expiratory limb of a ventilator circuit. Accordingly, this device allows a patient on a ventilator to be subjected to positive expiratory pressure (PEP) therapy combined with airway oscillation and intermittent air flow acceleration while allowing the oscillatory PEP respiratory therapy treatment to be bypassed without interrupting the integrity of the ventilating circuit once the device has been installed in the ventilator circuit. In this manner, all expiratory air in the ventilator circuit is accounted for, the expiratory air volume may be accurately monitored and the ventilator circuit does not have to be broken for insertion or removal of the device.

Abstract: A HME bypass system including a manually actuated bypass valve which is coupled into a respiratory air circuit, preferably upstream of the HME, to permit inspiratory air to be selectively passed through the HME, or to bypass the HME, depending upon the treatment desired by the healthcare provider.

Abstract: An enhanced PEP therapy device which provides a variable frequency and variable magnitude positive expiratory pressure by utilizing a nonlinear orifice for adjusting and maintaining a desired positive expiratory pressure oscillation in accordance with a predetermined pressure range of a patient's expiratory air.

Abstract: An improved maximum expiratory pressure device and cough simulator including a flow tube having an integral mouthpiece at a patient input end, and a hinged door at an opposite or discharge end for sealing off the flow tube. The hinged door is held closed by a releasable trigger operable by the patient to release the door after pressure build up to simulate a cough. A foldable pressure monitoring port is provided to connect the maximum expiratory pressure device to a pressure gauge, if desired, for monitoring the expiratory pressure developed within the flow tube.

Abstract: An improved continuous positive airway pressure therapy device including a ring orifice through which compressed air or oxygen is introduced to effectively amplify the air flow to the patient by drawing ambient air into the device inlet for maintaining a continuous positive pressure of a patient's lungs during all portions of the breathing cycle.

Abstract: An improved incentive spirometer having a modular goal recording counter (GRC) releasably attached thereto for enabling a patient to view the number of times a predetermined respiratory therapy inhalation exercise has been properly performed. The GRC also includes a coaching lamp to facilitate the patient's maintaining the desired flow rate of inspiratory air for a predetermined time period. The GRC is operational in one mode to initiate a count of the number of successful exercise completions beginning with “0”, and in another operational mode to retain and recall the count of the number of successful exercises previously completed. The operation of the GRC is controlled by a microcontroller which controls the operation of the GRC and the electrical circuit connected thereto is designed to minimize the power requirements of the components when the GRC is placed in the retain and recall mode of operation.

Abstract: A single switch is utilized within a common ground line to control the current flow through a plurality of loads, whereby power to all of these loads may be interrupted by opening the system ground return so that power can be supplied to a particular component of the circuit, a microprocessor, to the exclusion of all remaining components by the operation of a single switch.