Medical device assemblies capable of aspirating liquid into a syringe barrel or other medical devices while evacuating any air from the syringe are described. An exemplary medical device includes a syringe barrel, plunger rod and stopper assembly having an air permeable and liquid impermeable porous portion and structure for forming a vacuum within either the stopper or the plunger rod. Described is a medical device including a syringe barrel, plunger rod and stopper assembly having an air permeable and liquid impermeable porous portion and structure for forming a vacuum within chamber between the stopper and plunger rod wherein the plunger rod includes a sealing edge and is moveable relative to the stopper. Exemplary medical devices may include a vent for allowing air that permeates through the porous portion to escape to atmosphere. Methods for aspirating a syringe barrel with a liquid are also provided.

A needle structure for injecting a filler and monitoring a blood backflow situation simultaneously includes a needle, a housing and a partitioning member. The needle includes a needle chamber and a needle opening connected to the needle chamber. The housing includes a housing chamber and a housing opening connected to the housing chamber, and the housing chamber is connected to the needle chamber to form a needle housing chamber. The partitioning member is disposed in the needle housing chamber. The needle housing chamber is separated into a first chamber and a second chamber by the partitioning member. The needle opening is separated into an injection opening and a blood backflow opening by the partitioning member. The first chamber is connected to the injection opening, and the blood backflow opening and the housing opening are connected by the second chamber.

A syringe barrel including a tubular, barrel body operable to receive a syringe plunger at a proximal end thereof and a syringe needle at a distal end and sidewalls of said syringe body being flexible and elliptical in cross-section and opposing compression of said syringe barrel at opposite ends a major axis of said syringe barrel cross-section serving to operably flex the elliptical cross-section of said syringe body into a more circular cross-sectional configuration and increasing the volume of said syringe barrel body and concomitantly serving to create a relative vacuum within said syringe body as compared with the configuration of said syringe tubular, barrel body prior to application of said compression.

An anesthetic administration device comprising an infusion device, which is in fluid connection with a regional anesthetic needle by means of a feed tube. The infusion device comprises one or more anesthetic flow devices capable of triggering forward flow, and optionally backward flow, of the local anesthetic through the regional anesthetic needle. Forward, and optionally backward flow, of the local anesthetic through the regional anesthetic needle is controlled by a controller that comprises one or more actuator switches. The one or more actuator switches are positioned on the device such that they may be operated by hand.

Various handheld medical dispensing configurations and methods including the following: Handheld medical dispensing system comprises a syringe, which has a plunger, releasably mounted to syringe actuation apparatus, the apparatus having an actuator configured such that it can move the plunger more than once to dispense a plurality of amounts of substance from the syringe. A method of dispensing fluid from a syringe comprises holding a medical substance delivery system including a syringe, which has a needle, and which is secured to syringe actuation apparatus configured to dispense predetermined amounts of the substance from the syringe, penetrating the needle at one patient site and using the apparatus to deliver a predetermined amount of the substance, and penetrating the needle at another patient site and using the apparatus to deliver a predetermined amount of the substance.

A catheter system may include a catheter adapter, a catheter extending distally from the distal end of the catheter adapter, and a needle hub coupled to the catheter adapter. The needle hub may be transparent, and a needle may be secured within the needle hub. The catheter system may also include a flow control plug coupled to the proximal end of the needle hub. In some embodiments, a flashback pathway may be disposed between an outer surface of the flow control plug and an inner surface of the needle hub. In some embodiments, the catheter system may include an inner barrel and an outer barrel, and the inner barrel and the needle hub may be configured to move proximally within the outer barrel to retract the needle. The flashback pathway may be disposed between an outer surface of the needle hub and an inner surface of the inner barrel.

A pre-fill syringe with a receiver tube (1, 12, 21) with a nozzle (4, 20) positioned at the nozzle-side end of the receiving tube (1, 12, 21), the piston (2, 18) is to be formed in such a manner that it for a transport state at the nozzle-side end of the receiver tube (1, 12, 21) can be connected with the receiving tube.

A catheter system may include a catheter adapter, a catheter extending distally from the distal end of the catheter adapter, and a needle hub coupled to the catheter adapter. The needle hub may be transparent, and a needle may be secured within the needle hub. The catheter system may also include a flow control plug coupled to the proximal end of the needle hub. In some embodiments, a flashback pathway may be disposed between an outer surface of the flow control plug and an inner surface of the needle hub. In some embodiments, the catheter system may include an inner barrel and an outer barrel, and the inner barrel and the needle hub may be configured to move proximally within the outer barrel to retract the needle. The flashback pathway may be disposed between an outer surface of the needle hub and an inner surface of the inner barrel.