Abstract: Making temperature measurements of blood inside a disposable, sterilized medical device by providing receptacles in the walls of the device for receiving temperature-sensitive probes, the receptacles including a tubular heat-conductive member, extending through a wall of the device and being sealed to the wall, and a cylindrical body having protuberances extending radially for cooperating with slots in a temperature-sensitive probe.

Abstract: Diffusing gas into and out of a liquid at a uniform rate by distributing a foam consisting of bubbles with liquid walls surrounding the gas through elongated passages defined by a corrugated surface adjacent to a smooth surface, while simultaneously providing for indirect heat - exchange of the blood foam while the foam is within the elongated passages.

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: A blood oxygenator with an oxygen filter in the oxygen inlet chamber, featuring in a particular aspect elevating the filter above the diffuser plug of the oxygenator.

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 cap for a tubular fitting featuring a tubular body adapted to fit loosely over the exterior of a tubular fluid fitting and an interior surface inside the tubular body for bearing against a mating exterior surface on the fitting, the tubular body being retained either in a loose breathing position over the tubular fitting or in a sealing position with the mating interior and exterior surfaces tightly engaged. Releasable retaining means are provided to retain the body in either the breathing or sealing position and twisting means are provided to move the cap from one position to the other.