Abstract: A method and apparatus for measuring the volume of a fluid using a load cell transducer in which the container holding the fluid, such as a cardiotomy reservoir, is firmly but detachably engaged to an adapter for a load cell transducer. Further, this invention relates to a method and apparatus for detecting the presence and alignment of the container on a load cell so as to allow accurate measurement of the volume of a fluid contained within the container. The apparatus generally includes a magnetic ring on a bottom-facing surface of the container, a metallic ring on an upward-facing surface of the mounting adapter for the load cell and a sensor capable of detecting a magnetic field.

Abstract: A pseudo palate is formed of a thin sheet of material shaped to the contour of the palate of a person whose speech is to be tested. On the lingual surface of the sheet is an array of electrodes located in the lingual contact areas of the palate and spaced apart predetermined distances. Conductors attached to the electrodes are embedded in the sheet and are grouped together in at least one bundle to exit from the palate at its posterior, into the buccal cavity of the patient's mouth where the bundle of conductors may exit from the mouth at a corner thereof. These conductors are attached to suitable instrumentation which may give a visual or possibly aural signal corresponding to the position of the tongue when the patient makes, or attempts to make, designated speech sounds.