Abstract: A device for automatically administering predetermined amounts of medication from a syringe through a conduit to a patient is described. This device includes an automatic flushing mechanism which flushes the medication from the conduit after the completion of the medication dosage using a flush syringe containing a flush solution. A force derived from a spring is used to expel the medication and the flush solution from their respective syringes. Thus, the patient is insured a full dosage of prescribed medication without the need of continuous attention by hospital staff.

Abstract: A spirometer is provided which has a cylinder with a piston slidable in the cylinder. A pair of orifices from the atmosphere to the opposite sides of the piston are provided, the resistance to air flow through them being in a predetermined ratio. A tube is provided for connecting the mouth of a patient to one side of the piston chamber for effecting movement of the piston during inhalation or exhalation. The cylinder is provided with indicia representing units of air volume inhaled or exhaled with the volume of the cylinder being substantially smaller than the volume of air indicated by the spirometer.

Abstract: A patient breathing apparatus is disclosed which includes a liquid drain connected to receive liquid condensation. The drain includes a barrier which is water permeable and gas impermeable when wet. The barrier may be provided with a water soluble layer that is gas impermeable when dry.