An infusion set, patch pump, or elements thereof, having an exemplary catheter (14) provided with one or more channels, grooves and coatings (24, 34, 44), configured and arranged to provide a degree of strength and flexibility. The catheter (14) can also have an exemplary flexible union with the hub (12) having at least one of a ball-and-socket joint (66, 68), a sliding plate (86), and a flexible bushing (106), and which is sealed to allow even further movement of the catheter (14) while preventing leakage of medication through the junction. In doing so, a number of benefits associated with the use of rigid materials in catheter construction can be provided while at the same time, benefits associated with the use of flexible materials in catheter construction and/or flexible engagement with the hub can also be provided.

An infusion set adapted to be secured to a skin surface includes a fixed base member and a movable slide member. The fixed base member is connectable to the skin surface. The movable slide member has a needle or cannula connected thereto and is movable relative to the fixed base member. The movable slide member is movable from a first position in which the needle or cannula is not exposed externally of the fixed base member to a second position in which the needle or cannula is exposed externally of the fixed base member. The movable slide member is locked to the fixed base member in the second position.

An arrangement for introducing a liquid into the body of a patient or for withdrawing a liquid from the body of a patient, including a first structural part carrying a cannula for positioning in the body of the patient, and a second structural part with a connection port for detachably coupling a conduit for supplying or withdrawing a liquid, wherein the first and second structural parts are connected, can be rotated relative to each another and in relative rotational positions form a channel for introducing a liquid from the conduit to the cannula or for withdrawing a liquid from the cannula to the conduit, and whereby movement of the conduit for coupling and uncoupling is transverse to the longitudinal axis of the cannula.

A vascular access device for haemodialysis permanently implantable in a patient having a pre-existing arteriovenous fistula or, alternatively, in a vein, an artery or between a vein and an artery, to create an artificial arteriovenous fistula and a vascular access healing device and a sterile package containing a single-use device of collecting and/or injecting blood usable in combination with the vascular access device.

A manual infusion set comprises a top connector lockable in a plurality of positions. The top connector and tubing is initially loaded from the top and then slid forward in order to puncture the septum. Once the connector is attached, it cannot be rotated. With the connector locked in place, flexible tubing connects the septum hub with a medicine pump, which continually supplies medicine such as insulin to a user.

A method, including the operations of molding a hollow cannula to create flash on the cannula at parting lines of a mold, retaining the flash on the cannula, and installing the cannula with the flash in a medical device.

A system for delivering fluid to a user transcutaneously includes a torsion spring, a drive wheel, a linear slide having a stylet attached thereto, and a cannula. The torsion spring, when actuated, is configured to rotate the drive wheel to cause the linear slide to move axially to drive the stylet and cannula into a user-s skin.

Embodiments of devices and methods to maintain preservative concentration in a medication delivered using a medical device are provided. A barrier layer can be used to prevent migration of preservatives. A vent can be used to allow release of preservatives prior to delivery to the patient. An absorbent element can be used to maintain preservative concentration at a desired level. A filter can be used to capture particulates from the medication prior to delivery to a patient.

A wearable infusion pump assembly. The wearable infusion pump assembly includes a reservoir for receiving an infusible fluid and a fluid delivery system configured to deliver the infusible fluid from the reservoir to an external infusion set. The fluid delivery system includes a controller, a pump assembly for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid to the external infusion set, the pump assembly comprising a pump plunger, the pump plunger having distance of travel, the distance of travel having a starting position and an ending position, at least one optical sensor assembly for sensing the starting position and ending position of the pump plunger distance of travel and sending sensor output to the controller, and a first valve assembly configured to selectively isolate the pump assembly from the reservoir, wherein the controller receives the sensor output and determines the total displacement of the pump plunger.

In accordance with yet another embodiment of the present disclosure an inserter assembly may comprise a housing. The inserter assembly may further comprise an infusion set having adhesive on a portion thereof for adhering the portion of the infusion set to skin. The inserter assembly may further comprise a sharp bearing body. The inserter assembly may further comprise a trigger. The inserter assembly may further comprise an insertion bias member held in an energy storing state by the trigger. The insertion bias member may urge the sharp bearing body from a raised state to a forward state when the trigger is released. The inserter assembly may further comprise a means for releasing the trigger after inserter assembly is withdrawn from the body and skin adhered to the portion of the infusion set has been lifted from underlying anatomy.