members are standard stock and require no special machining except for the slots necessary to enable positioning of the insertion guides 64 and the calibration openings it should be apparent that the breathing exerciser disclosed and described herein provides a means by which a patient receiving respiratory therapy can engage in breathing exercises which can be easily monitored and controlled the ability to monitor and control the tidal volume of respiratory patients can be utilized in the application of medicines in the form of a vapor the form most frequently utilized for respiratory patients a breathing exerciser in accordance with this invention can be used in conjunction with an inhalation therapy apparatus commonly referred to as a nebulizer as shown diagrammatically in fig1 the nebulizer 100 comprises a reservoir for a medicinal fluid and means for a patient to inhale oxygen which has been saturated with vapor from the medicinal fluid a t connector 102 has one end attached to the tapered end 20 of exerciser 10 and the other end attached to mouthpiece 104 tapered end 20 facilitates attachment to almost any other apparatus for example directly to mouthpiece 104 if the nebulizer is not utilized saturation usually occurs by a vacuum driven venturi jet in the atomization chamber 106 the.