An auto-retractable syringe having a barrel and a plunger wherein engagement of said plunger with an otherwise immobilised needle hub allows a biasing member to push the needle hub into a cavity in the plunger.

A pneumatically activated retractable-needle syringe comprising a syringe barrel, a plunger, a needle, a needle hub, a locking tip, a propellant gas release cell and a rupture mechanism is provided. The plunger has a retraction lumen defined therein for receiving the needle when the retractable-needle syringe is actuated.

Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.

Embodiments of a retractable syringe assembly are provided that include a dual syringe barrel configuration. One or more embodiments include reuse prevention features and features that prevent premature activation of the retraction mechanism. Methods for aspirating and expelling liquid from medical devices are also provided.

The invention relates to medical equipment, in particular to single-use devices for injection. The syringe consists of a needle, a barrel, a plunger, and a plunger stopper. The plunger with the plunger stopper has the same length as the syringe barrel and a specific form of a cylindrical handle stop. In order to release the solution, the syringe has not one but several small holes allowing the solution to pass through smoothly, while preventing the plunger from being pushed out from the needle fitting tip. The technical result consists in preventing reuse of the syringe with full immersion of the plunger.

The present teachings relate generally to a medical sampling device assembly (10), comprising: a sampling portion (20) disposed at a distal end (12) of the assembly; handle portion (30) disposed at a proximal end (14) of the assembly and including a bias member (32), a locking member (34) coupled to the bias member, and an indicator member (36); an intermediate portion (40) disposed between and interconnecting the sampling portion and the handle portion; and a sampling member (50) slidably disposed within the handle portion, the intermediate portion, and the sampling portion and protruding distally thereof, and in mechanical communication with the bias member; wherein the indicator member is deployed and the sampling member retracts permanently and completely into the sampling portion upon decoupling the locking member from the sampling member.

Disclosed is a single use self-disabling syringe capable of preventing the syringe from being reused after the syringe is used once on a patient, thereby preventing syringe reuse. The single use self-disabling syringe includes: a barrel having a needle attached to a tip end thereof and a fluid containing space defined therein, the fluid containing space being open at a rear end of the barrel; a plunger contained in the barrel and configured to draw in and expel a fluid; and a syringe reuse prevention means provided in the barrel along an inner surface thereof in an axial direction and configured to tear a part of the plunger so as to prevent the syringe from being reused.

A pneumatic retractable syringe has a plunger having an interior retraction lumen. The plunger and syringe barrel have cooperating locking elements so that the plunger is locked after use within the syringe barrel. After injection of medicament is completed, the needle is retracted into the lumen by compressed gas that is released from a gas cell within the syringe when the gas cell is ruptured just before the plunger reaches the end of its downstream path of travel.

One embodiment is directed to a system for injecting, comprising a syringe body defining an interior medicine chamber; a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; and a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber.

One embodiment is directed to a system for injecting, comprising a syringe body defining an interior medicine chamber; a stopper member configured to be inserted into the interior medicine chamber to contain medicine within the medicine chamber; a plunger member configured to be manually manipulated to insert the stopper member relative to the syringe body; and a needle having proximal and distal ends, the proximal end comprising an anchoring geometry configured to be at least partially inserted into the stopper member such that upon retraction of the stopper member, the needle is pulled proximally along with the stopper to be at least partially contained within the interior medicine chamber.