Abstract: A check valve and, in particular, an anti-siphon valve, for medical infusion lines and the like, including an axial upstream passageway and an axial downstream passageway, staggered and parallel with respect to each other, and a diaphragm of elastic material cooperating with an annular valve seat for normally keeping communication between these passageways closed. The diaphragm is composed of the end wall of a cup-shaped element on which a plunger rests coaxially, the plunger being slidable between a retracted inoperative position and an advanced operative position. Valve opening occurs following flexion of the diaphragm, which can be spontaneous due to a predetermined fluid pressure developing in the upstream passageway, or positively operated via the plunger (9).

Abstract: A safety syringe is provided which includes a housing and a barrel mounted for reciprocating movement within the housing. A ring is mounted to the barrel and is rotatable relative to the housing and to the barrel. The ring includes a plurality of tabs circumferentially spaced from each other. An interior wall of the housing includes a plurality of ramps and a plurality of stops. The ramps cooperate with the tabs of the ring so as to rotate the ring relative to the housing and to the barrel, while the stops cooperate with the tabs for stopping the rotation of the ring relative to the housing and to the barrel. Locking means is also included within the interior wall of the housing for locking the barrel so as to allow for only a single use of the safety syringe.

Abstract: A catheter(10) includes an elongated tubular member (14) having a proximal end (34) opposite a distal end (36). The distal end has a loop hole (70), at least one transition hole (72), and an end hole (78). A thread (60) has one end (62) fixed at the proximal end. The thread extends through the interior of the tubular member and out from the loop hole. The thread then extends through the transition hole and re-enters the tubular member at the end hole (78). The thread has a pulling end (64) exiting the tubular member at the proximal end. Application of a pulling force on the pulling end causes the distal end to form a first loop from the loop hole to the transition hole and a second loop from the transition hole to the end hole. The tubular member has a plurality of drainage/infusion ports (40) between the distal end and the end hole. The ports are in a radial position substantially opposite the radial position of the loop hole. The catheter (10) further includes a hub (12) having a channel (20) therethrough.