Abstract: A captive deadender cap for use in venting the patient side chamber of a disposable pressure transducer through a vent port. The captive deadender cap includes retention tabs formed along the internal threads of the standard Luer threads of the deadender cap and which create a resistance with the mating external threads of the female Luer fitting on the vent port. Thus the captive deadender cap is not easily removable but is held captive to the vent port. By an increase in the torque, however, the resistance may be overcome by the user and, if desired, the captive deadender cap may be fully removed from the vent port.

Abstract: A deadender cap that is designed to be screwed into a standard medical Luer male thread connection to dead end that connection. The deadender cap is a one-piece molded construction having an internal tapered projection that fits within the open passages of the male Luer connection a predetermined distance when the deadender cap is tightened into position, thus liquid within the open passage is forced outwardly and then as the deadender cap is tightened and no air bubbles are formed.

Abstract: Method of making grooved, bell-ended thermoplastic pipe. In order to remove the core from undercuts, most of the molded article is cooled until substantially rigid while the bell-end is cooled more slowly. The article is ejected from the mold while the bell end is still soft enough to be deformed during ejection but recovers its shape after removal from the mold.