Abstract: A tubing injection site guard comprising a compressible, penetrable sleeve for surrounding a continuous tube and a rigid casing enclosing the sleeve. The casing comprises two opposing longitudinal sections longitudinally hinged, with a needle access port in one section to allow insertion of a needle through the sleeve and into the tube. The sections are capable of being locked together to radially compress the sleeve over its entire length and thereby seal needle holes. An adjustable locking means is provided to lock the sections together and to allow adjustment of the radial compression. The site guard also protects the operator from injury while inserting the needle by enclosing the entire injection site except at the needle access port.

Abstract: Sturdily mounting a disposable medical device by rotatably attaching a back plate to a back brace, biasing the back plate toward the medical device and employing a camming means on the back plate cooperating with a tab on the device to rotate the plate away from the device as the device is initially slid onto the mount and to return the plate to lock the device in place when the device is slid fully onto the mount.

Abstract: Monitoring the level of both opaque and clear liquids in a reservoir without contacting the liquids by providing first and second reservoir wall portions that define a region through which a light beam is passed from a light source to a light sensor so that opaque liquid extinguishes the light beam and so that the wall portions cooperate with the clear liquid to refract the light beam away from the sensor. A monitoring line segment, defined as the portion of a hypothetically unrefracted and unreflected light beam between the first and second reservoir wall portions, is a small fraction of the largest interior linear dimension of the reservoir in a plane containing the monitoring line segment and a line normal to the first reservoir wall portion.

Abstract: A mount for a fluid flow transfer apparatus for facilitating degassing of the apparatus comprises a pair of trunnions for cooperating with a pair of stub shafts on opposite sides of the fluid flow transfer apparatus, to permit rotation of the apparatus, and a selectively disengageable latch spaced radially from the axis of rotation of the trunnions and shafts, to secure the apparatus against rotation once the apparatus is placed in either an operational position or an inverted degassing position.

Abstract: A fluid flow transfer apparatus is constructed by placing a pleated membrane within a central chamber in a housing, injecting liquid potting material into the central chamber, positioning the housing while the potting is still flowable such that the membrane tips to be anchored to the housing are horizontal at the bottom of the membrane body and the inner housing surface adjacent to those membrane tips is horizontal, allowing the liquid potting to flow between that surface and those lower membrane tips and settle uniformly therebetween, and curing the potting material to anchor those tips to the housing.