Abstract: A dispenser apparatus for ultrasound gel comprises a cylindrical body having a closed first end and a dispensing opening at the other end. There is an inlet opening near the first end in fluid communication with a source of pressurized ultrasound gel. A plunger is secured to a shaft near its first end; and there is a valve element at the second end of the shaft, adapted to close the dispensing opening when the shaft is in a first, at rest position, and to permit a dispensing operation when the shaft is in a second, dispensing position. The plunger has at least one passageway formed through its thickness, extending towards a second face. A plunger return spring acts against the second face of the plunger, so as to urge it towards the rest position. A freely moving sealing plate covers the passageway, and is mounted for longitudinal movement along the shaft; and has a return spring to urge it towards the second face of the plunger. The plunger covers the inlet opening when in its first position.

Abstract: A disposable sheath (10) for a medical scope (11) and having a flexible, elongated body portion (13) formed from a translucent plastic material (15) with a rough-textured interior surface (19) and a flexible, transparent tip portion (22). The rough-textured interior surface includes projections (18) that result from a plurality of indentations (17) formed in the exterior surface (16) of the body portion of the sheath. The translucent plastic material of the body portion is bonded to the transparent tip portion of the sheath by high frequency heat sealing, which is pathogen impermeable. The plastic materials of the sheath are also pathogen impermeable. In one embodiment, the tip portion (46) of the sheath (33) is formed from a flat, foldable sheet (48) of plastic material. The lateral edges (51, 52) of the foldable sheet are heat sealed to each other, and the proximal edges (49, 50) are heat sealed to the distal end (47) of the body portion (35) of the sheath.