"In some embodiments, the first one-way valve and the second one-way valve may be aligned with the third port. The first and second one-way valves may comprise umbrella valves, for example. The nebulizer connector may include a nebulizer port that may be situated between the first and second one-way valves. The nebulizer port may be adapted for coupling to a nebulizer. In some embodiments, the nebulizer connector may include a first tubular member that may carry the first one-way valve at a first end and that may carry the second one-way valve at a second end. The nebulizer connector may include a second tubular member that may be perpendicular to the first tubular member. The second tubular member may serve as the nebulizer port.
"According to this disclosure, a respiratory therapy device may include a housing having a first port to receive a person's exhaled breath generally along a flow path. The housing may have an end wall that is spaced from the first port and that may be arranged generally perpendicular to the flow path. The end wall may have a second port, a third port, and a fourth port. A standard positive expiratory pressure (PEP) device may be coupled to the second port. An oscillatory PEP device may be coupled to the third port. A nebulizer connector may be coupled to the fourth port.
"The respiratory therapy device may further include a first manually operable member that may be movable to select whether the first port communicates with the standard PEP device through the second port or whether the first port communicates with the oscillatory PEP device through the third port. Furthermore, a second manually operable member may be movable to adjust operation of at least one of the standard PEP device and the oscillatory PEP device. The second manually operable member may include a rotatable knob that, in turn, may have a first portion which adjusts operation of the standard PEP device when the knob is rotated and a second portion which adjusts operation of the oscillatory PEP device when the knob is rotated.
"The first portion of the rotatable knob may include a cylindrical stem that may have a hollow core and a plurality of apertures extending through the cylindrical stem. The second portion of the rotatable knob may include a disk. The disk may be eccentric to an axis about which the knob rotates. In some embodiments, the disk may include an edge having notches that may selectively receive an adjustment member of the oscillatory PEP device when the respective notch is aligned with the adjustment member. The oscillatory PEP device may include a flexible tube and movement of the adjustment member by the disk may change a characteristic of oscillation of the flexible tube. For example, the characteristic of oscillation changed by movement of the disk may include at least one of a frequency of oscillation and an amplitude of oscillation. According to this disclosure, the oscillatory PEP device may include an elongated stick coupled to the adjustment device and extending alongside the flexible tube. The adjustment device may be formed as a tab extending from the elongated stick.
"According to this disclosure, the first manually operable member may include a knob, a stem extending from the knob, and a plug coupled to the stem. The plug may have a first end that may block the second port from communicating with the first port when the knob is rotated to a first position and the plug may have a second end that may block the third port from communicating with the first port when the knob is rotated to a second position. In some embodiments, the first and second ends of the plug are tapered. For example, the first and second ends of the plug may be substantially conical.
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